BEGIN:VCALENDAR VERSION:2.0 PRODID:-//AIP Calendar//www.aip.de// METHOD:PUBLISH BEGIN:VEVENT SUMMARY:Colloquium | Tobias Buck (Heidelberg) DTSTART:20261119T133000Z DTEND:20261119T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2306 CATEGORIES:Wissenschaftliches CATEGORIES:Allgemeiner Kalendertermin CATEGORIES:öffentlich CONTACT:Ewald Puchwein DESCRIPTION:Speaker: Tobias Buck (Heidelberg)\nTitle: TBD\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Serena Criscuoli (National Solar Observatory | Boulde r\, CO\, USA) DTSTART:20260618T123000Z DTEND:20260618T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2352 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Julián Alvarado-Gómez DESCRIPTION:Speaker: Serena Criscuoli (National Solar Observatory | Boulde r\, CO\, USA)\nTitle: Using Spatially Resolved Solar Observations to Impro ve Models of Solar and Stellar Variability\nAbstract: Models of solar and stellar variability are essential for a wide range of applications\, from understanding the influence of solar irradiance on Earth's atmosphere to c haracterizing exoplanet host stars and improving the detectability of exop lanets. Over the past decades\, irradiance variability models have achieve d considerable success in reproducing many observed signatures of magnetic activity. However\, important discrepancies remain\, highlighting limitat ions in our understanding of how different atmospheric structures contribu te to spectral variability.\nIn this seminar\, I will provide a brief over view of current solar and stellar variability models\, discussing both the ir achievements and their outstanding challenges. I will then focus on one puzzling problem: the variability of the hydrogen Balmer lines. These lin es\, especially Hα\, Hβ\, Hγ\, and Hδ\, are among the most widely used diagnostics of stellar magnetic activity\, yet recent observations have r evealed complex and sometimes unexpected behavior\, including weak or even anti-correlated variations with traditional chromospheric activity indica tors such as the Ca II lines.\nI will present recent efforts to understand the origin of this behavior through a combination of disk-integrated obse rvations\, spatially resolved measurements\, and semi-empirical atmospheri c modeling. I will discuss how modern high-resolution observations enable us to identify the physical origins of these discrepancies and refine exis ting models. Particular attention will be given to recent observations acq uired with the IAG spectrograph and results from the Visible Spectro-Polar imeter (ViSP) at the Daniel K. Inouye Solar Telescope\, which provide new insights into the relationship between magnetic activity and Balmer-line v ariability in the Sun and solar-like stars. Finally\, I will present preli minary results from an analysis of synoptic ChroTel Hα and Ca II K observ ations\, which suggest that chromospheric features\, often neglected in cu rrent solar and stellar irradiance models\, may play a role in shaping chr omospheric variability\nNote: Host: Meetu Verma\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Antoine Strugarek (CEA Saclay | Paris\, France) DTSTART:20261015T123000Z DTEND:20261015T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2353 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Julián Alvarado-Gómez DESCRIPTION:Speaker: Antoine Strugarek (CEA Saclay | Paris\, France)\nTitl e: TBD\nAbstract: TBD\nNote: Hosts: Ilaria Civale and Katja Poppenhäger\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Andrew Pontzen (Durham University) DTSTART:20261112T133000Z DTEND:20261112T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2359 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Ewald Puchwein DESCRIPTION:Speaker: Andrew Pontzen (Durham University)\nTitle: TBD\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Boris Gaensicke (University of Warwick | Coventry\, U K) DTSTART:20260924T123000Z DTEND:20260924T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2361 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Julián Alvarado-Gómez DESCRIPTION:Speaker: Boris Gaensicke (University of Warwick | Coventry\, U K)\nTitle: TBD\nAbstract: TBD\nNote: Host: Axel Schwope\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Tobias Buck (Heidelberg) DTSTART:20261119T133000Z DTEND:20261119T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2365 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Ewald Puchwein DESCRIPTION:Speaker: Tobias Buck (Heidelberg)\nTitle: TBD\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Dominika Wylezalek (University of Heidelberg | German y) DTSTART:20261203T133000Z DTEND:20261203T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2366 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Julián Alvarado-Gómez DESCRIPTION:Speaker: Dominika Wylezalek (University of Heidelberg | German y)\nTitle: TBD\nAbstract: TBD\nNote: Hosts: Tanya Urrutia and Guilherme Co uto\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Kolloquium | Paul Groot (UCT/SAAO and Radboud University) DTSTART:20260625T123000Z DTEND:20260625T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2369 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Ivan Minchev DESCRIPTION:Speaker: Paul Groot (UCT/SAAO and Radboud University)\nTitle: Ultra-compact binaries and gravitational-wave progenitors\nAbstract: Trans ients are lighting up the skies at an ever increasing\ndetection rate acro ss all wavelengths and messengers. 'Classical'\noptical detections have be en joined by all other electromagnetic\nwavelengths\, as well as gravtatio nal waves and neutrinos. This allows\nus not only to probe the physics res ponsible for\, and revealed by\, the\ntransient events themselves\, but al so to use them as probes of their\nunderlying populations. These are often binary systems with at least\none stellar remnant (white dwarf\, neutron star or black hole) and the\ntransient event itself often marks a dramatic and important moment\nin the evolutionary history of such binaries. Under standing the binary\nevolution and physics is important to understand thei r role in various\nphenomena such as supernovae Type Ia\, core-collapse su pernovae\, the\nfirst stars and stellar-mass black holes\, as well as the chemical\nenrichment of the Universe and the physics of accretion disks. \ nThe field of transients\, and in a broader sense\, time-domain astronomy\ ,\nis undergoing a revolution. With more and more instruments we can\ndisc over them at an ever-higher rate\, and response times have come down\nfrom days to minutes. However\, a major bottle neck is the lack of\nspectrosco pic facilities to identify and characterise these events.\nWithin the cont ext of the ESO Expanding Horizon's initiative\, the Time\nDomain Telescope is being defined to remedy this looming gap: a highly\nflexible\, 'on-dem and' facility that will provide immediate\nspectroscopic capability throug h a set of 100 2-meter telescopes that\nare each AO-assisted to provide ne ar-diffraction limited spectroscopy\nat resolutions ranging from 1-100k\, across the 0.4-2.2 micron\nwavelength range. The unit telescopes are all i ndividually steerable\,\nand combining all 100-units on a single target wi ll allow for optical\nspectroscopy at g~25 on a 30 minute time-scale\, pro viding the perfect\nfacility for not only the current generation of transi ent discoverers\nbut also the next who will be using LISA\, Einstein Teles cope\, Athena\,\nArgus\, the Digital Telescopes and many more facilities t o uncover the\ndynamic Universe.\nNote: Host: Alex Schwope\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Heino Falke (Radboud University Nijmegen | The Nether lands) DTSTART:20261126T133000Z DTEND:20261126T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2373 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Ewald Puchwein DESCRIPTION:Speaker: Heino Falke (Radboud University Nijmegen | The Nether lands)\nTitle: TBD\nAbstract: TBD\nNote: Host: Christoph Pfrommer\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Thinkshop zum Thema "Magellanic Clouds" DTSTART;VALUE=DATE:20270906 DTEND;VALUE=DATE:20270911 DTSTAMP:20260706T223518Z UID:www.aip.de-2388 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftliches Meeting/Workshop CATEGORIES:öffentlich DESCRIPTION: END:VEVENT BEGIN:VEVENT SUMMARY:Colloquium | Marta Volonteri (IAP\, Paris) DTSTART:20261105T133000Z DTEND:20261105T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2406 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Kolloquium CONTACT:Ewald Puchwein DESCRIPTION:Speaker: Marta Volonteri (IAP\, Paris)\nTitle: TBD\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Jamboree (ISC) DTSTART:20261110T133000Z DTEND:20261110T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2414 CATEGORIES:Internes CATEGORIES:Institutstermin CATEGORIES:öffentlich DESCRIPTION: LOCATION:Maria-Margaretha-Kirch-Haus\, Campus Babelsberg END:VEVENT BEGIN:VEVENT SUMMARY:Karriere-Event DTSTART:20261006T123000Z DTEND:20261006T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2415 CATEGORIES:Internes CATEGORIES:Institutstermin CATEGORIES:öffentlich DESCRIPTION: LOCATION:Konferenzraum Maria-Margaretha-Kirch-Haus\, Campus Babelsberg END:VEVENT BEGIN:VEVENT SUMMARY:SOLER User Workshop DTSTART;VALUE=DATE:20260630 DTEND;VALUE=DATE:20260703 DTSTAMP:20260706T223518Z UID:www.aip.de-2429 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftliches Meeting/Workshop CATEGORIES:öffentlich CONTACT:Alexander Warmuth DESCRIPTION: END:VEVENT BEGIN:VEVENT SUMMARY:Tag der offenen Tür auf dem Telegrafenberg - Großer Refraktor un d Einsteinturm DTSTART;VALUE=DATE:20260926 DTEND;VALUE=DATE:20260927 DTSTAMP:20260706T223518Z UID:www.aip.de-2430 CATEGORIES:Öffentliches CATEGORIES:Öffentlichkeitsarbeit CATEGORIES:öffentlich CONTACT:presse@aip.de DESCRIPTION: LOCATION:Wissenschaftspark Albert-Einstein\, Telegrafenberg\, Potsdam END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Junais (AIP) DTSTART:20260609T123000Z DTEND:20260609T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2467 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Marcel Pawlowski DESCRIPTION:Speaker: Junais (AIP)\nTitle: Low surface brightness galaxies in the era of deep large-sky surveys and artificial intelligence\nAbstract : Low surface-brightness (LSB) galaxies\, which are typically fainter than the night sky\, contribute to the majority of the total number density of galaxies in the universe. They are a crucial and powerful laboratory for testing our understanding of galaxy formation and evolution. However\, the extremely faint nature of these galaxies has long hindered in-depth studi es of them\, biasing our knowledge of galaxy physics towards only bright\, massive galaxies. With the advent of new\, powerful instruments capable o f carrying out deep\, large sky surveys (e.g.\, Euclid\, LSST)\, combined with the era of modern artificial intelligence (AI) tools\, we are opening a new window into a comprehensive understanding of the LSB galaxies. In t his talk\, I will present our recent and ongoing work on LSB galaxies. Thi s includes the development of novel AI tools for the automatic identificat ion and characterisation of LSB and dwarf galaxies\, investigating the rol e of environment in their evolution\, morphology\, and gas content. Additi onally\, I will also present some follow-up observing campaigns we did on extreme cases like ultra-diffuse and giant LSB galaxies.\n LOCATION:AIP\; Schwarzschildhaus\, Hörsaal END:VEVENT BEGIN:VEVENT SUMMARY:Special Seminar | Nic Scott (Georgia State University (The CHARA A rray)) DTSTART:20260713T090000Z DTEND:20260713T100000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2497 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Special Seminar CATEGORIES:Sonstiges CONTACT:Kalaga Madhav DESCRIPTION:Speaker: Nic Scott (Georgia State University (The CHARA Array) )\nTitle: Recent technical and scientific highlights from the CHARA Array\ nAbstract: The Center for High Angular Resolution Astronomy (CHARA) Array is a six-element interferometer at Mount Wilson Observatory with baselines ranging from 34 to 331 m. The Array hosts a number of new or upgraded\, s ix-telescope beam combiners that span the spectrum from the visible R-band to the near-infrared K-band with a range in available spectral resolution . The most recent are the Silmaril beam combiner that is a three-telescope instrument for H- and K-bands that is designed for very high sensitivity on fainter targets and the CHARA Array Integrated Optics Testbed (CHARIOT) that is a platform for characterizing integrated optic combiners. A seven th\, mobile telescope is now on-site for use with fiber optics for H-band beam transport. The mobile telescope will extend the baseline range from 2 0 m to 579 m\, creating new opportunities for measurements of stars with l arge and small angular diameters. Observing time is available to the commu nity through a program funded by NSF. The observing programs are solicited and peer-reviewed by NSF's NOIRLab.\nAbout Dr. Scott:\nNic Scott is the T elescope Systems Scientist at the Georgia State University Center for High Angular Resolution Astronomy (CHARA) Array. Nic directs all aspects of co ntrol and development of the telescopes\, enclosures\, and relay optics of the seven CHARA Array telescopes. Nic received dual PhD degrees from Geor gia State University and the Observatoire de Paris for his work on a novel fiber optics beam combiner at the Array. Prior to his current appointment at CHARA\, Nic was a Lead Research Scientist at the NASA Ames Research Ce nter where he developed speckle interferometry cameras for the WIYN\, Gemi ni-North\, and Gemini-South telescopes. Nic is currently leading the integ ration of the CHARA Array Integrated Optics Testbed (CHARIOT) experiment t o provide a flexible station in the beam combining laboratory to character ize novel integrated optics combiners.\nNote: Let me know if you want to m eet Nic. He will be at AIP until 14.05.\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Leibniz Academy Follow-up Workshop 2-10-25 DTSTART;VALUE=DATE:20260930 DTEND;VALUE=DATE:20261002 DTSTAMP:20260706T223518Z UID:www.aip.de-2500 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftliches Meeting/Workshop CATEGORIES:öffentlich CONTACT:Hakan Önel DESCRIPTION: LOCATION:Leibniz-Institut für Astrophysik Potsdam (AIP)\, Forschungscampu s Babelsberg\, Maria-Margaretha-Kirch-Haus END:VEVENT BEGIN:VEVENT SUMMARY:Virtuelle Babelsberger Sternennacht DTSTART:20260618T180000Z DTEND:20260618T190000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2502 CATEGORIES:Öffentliches CATEGORIES:Allgemeiner Kalendertermin CATEGORIES:öffentlich CONTACT:presse@aip.de DESCRIPTION:Vortrag: Licht lesbar machen (Daniel Sablowski)\n LOCATION:Der Vortrag wird über den YouTube-Kanal Urknall\, Weltall und da s Leben ausgestrahlt. END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Kaffeerunde (AIP) DTSTART:20260707T123000Z DTEND:20260707T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2503 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Marcel Pawlowski DESCRIPTION:Speaker: Kaffeerunde (AIP)\nTitle: Kaffeerunde\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Geraint Lewis (University of Sydney) DTSTART:20260616T123000Z DTEND:20260616T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2504 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Marcel Pawlowski DESCRIPTION:Speaker: Geraint Lewis (University of Sydney)\nTitle: Confront ing the Cosmological Principle: How secure are the foundations of the cosm os?\nAbstract: For nearly a century\, the cosmological principle has been the bedrock of our understanding of the universe. But what if this foundat ion is starting to crack? In this talk\, I describe how we have used quasa rs and radio galaxies to test the assumption that the cosmos is isotropic and homogeneous. We know that the Cosmic Microwave Background displays a s trong dipole\, attributed to our motion relative to the local Hubble flow\ , and if this motion truly defines our cosmic frame\, its imprint should a ppear elsewhere. Indeed\, we find a dipole in large-scale surveys of cosmo logical sources\, and whilst the direction agrees\, the amplitude does no t\, diverging sharply from expectations based on the CMB. I will explore p ossible explanations for these tensions and ask whether they signal new ph ysics or a fundamental shift in our cosmological worldview.\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:EPIC Technology Meeting DTSTART;VALUE=DATE:20260608 DTEND;VALUE=DATE:20260610 DTSTAMP:20260706T223518Z UID:www.aip.de-2506 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftliches Meeting/Workshop CATEGORIES:öffentlich DESCRIPTION:EPIC Technology Meeting on Photonics for Space and New Space a t AIP\n LOCATION:Kirch-Haus\, Konferenzraum\, AIP Campus Babelsberg END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Oliver Gressel (AIP) DTSTART:20260623T123000Z DTEND:20260623T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2518 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Rainer Arlt DESCRIPTION:Speaker: Oliver Gressel (AIP)\nTitle: Magnetic phenomena in pr otoplanetary discs\nAbstract: Advances in global magnetohydrodynamic (MHD) simulations along with radiative-chemical modelling have greatly promoted our understanding of protoplanetary discs. With few exceptions\, magnetic fields are playing a pivotal role. The evolutionary processes are general ly found to depend sensitively on the overall amplitude of the large-scale magnetic flux. This mandates to follow the magnetic flux evolution in tan dem with the non-ideal plasma effects. In the context of planet-formation theories\, our models can serve as the backdrop for population synthesis – governing the growth as well as orbital migration of the evolving plan ets\, and discerning in-situ from ex-situ formation pathways.\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Jake Mitchell (AIP) DTSTART:20260929T123000Z DTEND:20260929T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2519 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Rainer Arlt DESCRIPTION:Speaker: Jake Mitchell (AIP)\nTitle: tba.\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Kaffeerunde (AIP) DTSTART:20260901T123000Z DTEND:20260901T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2520 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Rainer Arlt DESCRIPTION:Speaker: Kaffeerunde (AIP)\nTitle: -\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Kaffeerunde (AIP) DTSTART:20261103T133000Z DTEND:20261103T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2521 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Rainer Arlt DESCRIPTION:Speaker: Kaffeerunde (AIP)\nTitle: -\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:AIP Seminar | Kaffeerunde (AIP) DTSTART:20261208T133000Z DTEND:20261208T143000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2522 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:AIP Seminar CONTACT:Rainer Arlt DESCRIPTION:Speaker: Kaffeerunde (AIP)\nTitle: -\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Special Seminar | Hanyuan Zhang (Cambridge) DTSTART:20260622T090000Z DTEND:20260622T100000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2524 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Special Seminar CATEGORIES:Galaxien\, Kosmologie CONTACT:Ivan Minchev DESCRIPTION:Speaker: Hanyuan Zhang (Cambridge)\nTitle: Modelling the secul ar evolution of the Milky Way’s disc\nAbstract: Stellar orbits in galact ic discs are not static but evolve through gravitational interactions with non-axisymmetric perturbations\, such as bars\, spirals\, and giant molec ular clouds. This process\, known as secular evolution\, efficiently redis tributes stars across the disc\, thereby mixing chemical signatures from t heir birthplaces and altering the galaxy's chemodynamical properties. Obse rvationally\, the age-metallicity distribution of the Galactic disc offers valuable insights into the Milky Way's secular evolution history. In this talk\, I will present our recent findings on mapping the Milky Way's secu lar evolution using main-sequence turn-off stars from LAMOST. I will demon strate how bar-driven radial migration can reproduce observed bimodal age- metallicity sequences. Additionally\, I will introduce our new chemo-chron o-dynamical model of the Galactic disc\, which reconstructs its inside-out growth\, metallicity evolution\, and secular evolution history. Our work reveals a clear transition in radial migration strength\, occurring around the epoch of the high- to low-α disc transition. Finally\, by comparing these findings with Nexus simulations\, I will discuss the implications of the inferred secular evolution history for the Milky Way.\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Special Seminar | Tamal Mukherjee (Macquarie University) DTSTART:20260623T090000Z DTEND:20260623T100000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2525 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Special Seminar CATEGORIES:Galaxien\, Kosmologie CONTACT:John Pharo DESCRIPTION:Speaker: Tamal Mukherjee (Macquarie University)\nTitle: Myster ies in the Peaks: What double-peaked Lyα emission reveals about galaxy-CG M interactions\nAbstract: Understanding how galaxies acquire and redistrib ute baryons remains one of the key open questions in galaxy evolution. Due to its resonant nature\, Lyman-α (Lyα) emission is highly sensitive to the distribution and kinematics of neutral gas\, making it a powerful trac er of the gaseous environments surrounding galaxies. In this talk\, I will present recent results from VLT/MUSE observations of Lyα emitters at z~3 –6\, focusing on what the diverse Lyα spectral profiles can tell us abo ut gas flows on circumgalactic scales. In particular\, the properties of d ouble-peaked Lyα emission\, including peak separation\, trough flux\, pea k asymmetry\, reveal systematic variations in neutral hydrogen column dens ity and gas kinematics with halo radius. Several systems also appear to be promising candidates for ionising photon escape\, linking Lyα spectral p roperties to feedback and radiation leakage.\nA small fraction of Lyα emi tters show blue-peak dominant profiles\, a rare spectral feature commonly interpreted as a signature of gas inflow. Deep JWST imaging and spectrosco py reveal that many of these blue-dominant systems are associated with com pact\, ultra-low-mass galaxies embedded within extended Lyα-emitting stru ctures. Their young stellar populations and elevated ionisation conditions suggest recent star formation likely triggered by the accretion of fresh\ , low-metallicity gas. Together\, these results highlight how Lyα spectra l complexity can provide a direct observational window into the interactio n between galaxies and the CGM in the early Universe.\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT BEGIN:VEVENT SUMMARY:Partielle Sonnenfinsternis DTSTART:20260812T150000Z DTEND:20260812T180000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2531 CATEGORIES:Öffentliches CATEGORIES:Öffentlichkeitsarbeit CATEGORIES:öffentlich CONTACT:presse@aip.de DESCRIPTION:Kleines Programm am AIP auf dem Campus in Babelsberg mit Vortr ägen und Sonnenbeobachtungen.\n LOCATION:AIP\, Campus Babelsberg\, An der Sternwarte 16\, 14482 Potsdam END:VEVENT BEGIN:VEVENT SUMMARY:Special Seminar | Dr. Nitin Yadav (Indian Institute of Technology\ , Delhi) DTSTART:20260629T123000Z DTEND:20260629T133000Z DTSTAMP:20260706T223518Z UID:www.aip.de-2533 CATEGORIES:Wissenschaftliches CATEGORIES:Wissenschaftlicher Vortrag CATEGORIES:öffentlich CATEGORIES:Special Seminar CATEGORIES:Sonne\, Sterne\, Exoplaneten CONTACT:Meetu Verma DESCRIPTION:Speaker: Dr. Nitin Yadav (Indian Institute of Technology\, Del hi)\nTitle: From Photospheric Vortices to Torsional Alfvén Waves: Pathway s for Energy Transport in the Solar Atmosphere\nAbstract: Magnetohydrodyna mic (MHD) waves are widely regarded as key candidates for transporting and dissipating energy in the solar atmosphere. Among them\, torsional Alfvé n waves—driven by rotational or vortex-like flows—have received increa sing attention as efficient channels for coupling photospheric dynamics to the chromosphere and corona. Vortex flows are ubiquitous in the solar pho tosphere\, arising from turbulent convection and interacting with magnetic flux concentrations. Their signatures have been identified across a wide range of magnetic environments\, from quiet Sun regions to strongly magnet ized plages\, and are now recognized as potential drivers of wave energy f lux into the upper atmosphere.\nIn this talk\, I will provide an overview of the current understanding of vortices and their connection to torsional Alfvén waves\, drawing on both observations and numerical models. I will then highlight results from recent three-dimensional radiation-MHD simula tions (MURaM)\, which allow us to systematically study vortex dynamics acr oss quiet Sun\, weak plage\, and strong plage conditions. These simulation s reveal how vortex generation\, spatial distribution\, and evolution depe nd on the magnetic environment\, and how the resulting swirling motions ar e linked to Alfvénic perturbations. In particular\, I will discuss the ef ficiency of vortex-induced Alfvén wave propagation in different regimes a nd the possible pathways toward dissipation and heating through vortex int eractions in strongly magnetized flux tubes.\n LOCATION:AIP\; Kirch-Haus\, Konferenzraum END:VEVENT END:VCALENDAR