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2019

 

Indications for transit-timing variations in the exo-Neptune HAT-P-26b. C. von Essen, S. Wedemeyer, M. S. Sosa, M. Hjorth, V. Parkash, J. Freudenthal, M. Mallonn, R. G. Miculán, L. Zibecchi, S. Cellone, and A. F. Torres. A&A, 628:A116, 2019. [ DOI | arXiv | ADS ]

Keywords: instrumentation: photometers, techniques: photometric, time, planets and satellites: fundamental parameters, stars: activity

 

First light of engineered diffusers at the Nordic Optical Telescope reveal time variability of the optical eclipse depth of WASP-12b. C. von Essen, G. Stefansson, M. Mallonn, T. Pursimo, A. A. Djupvik, S. Mahadevan, H. Kjeldsen, J. Freudenthal, and S. Dreizler. A&A, 628:A115, 2019. [ DOI | ADS ]

Keywords: instrumentation: photometers, methods: observational, techniques: photometric, stars: individual: WASP-12, stars: individual: CoRoT-1, stars: individual: TrES-3

 

Kepler Object of Interest Network. III. Kepler-82f: a new non-transiting 21 M planet from photodynamical modelling. J. Freudenthal, C. von Essen, A. Ofir, S. Dreizler, E. Agol, S. Wedemeyer, B. M. Morris, A. C. Becker, H. J. Deeg, S. Hoyer, M. Mallonn, K. Poppenhaeger, E. Herrero, I. Ribas, P. Boumis, and A. Liakos. A&A, 628:A108, 2019. [ DOI | arXiv | ADS ]

Keywords: planets and satellites: dynamical evolution and stability, planets and satellites: detection, methods: data analysis, techniques: photometric, stars: individual: Kepler-82, stars: fundamental parameters

 

Early B-type Stars with Resolved Zeeman Split Lines. S. Hubrig, S. P. Järvinen, M. Schöller, and J. F. González. In K. Werner, C. Stehle, T. Rauch, and T. Lanz, editors, Radiative Signatures from the Cosmos, volume 519 of Astronomical Society of the Pacific Conference Series, page 193, 2019. [ arXiv | ADS ]

 

Examining Magnetospheric Accretion in Herbig Ae/Be Stars Through Near-infrared Spectroscopic Signatures. M. Schoeller, S. Hubrig, M. A. Pogodin, S. P. Jarvinen, N. A. Drake, and J. A. Cahuasqui. In K. Werner, C. Stehle, T. Rauch, and T. Lanz, editors, Radiative Signatures from the Cosmos, volume 519 of Astronomical Society of the Pacific Conference Series, page 287, 2019. [ arXiv | ADS ]

 

VizieR Online Data Catalog: Byurakan-IRAS galaxies (BIG) with SDSS spectra (Mickaelian+, 2018). A. M. Mickaelian, G. S. Harutyunyan, and A. Sarkissian. VizieR Online Data Catalog, 904, 2019. [ ADS ]

Keywords: Active gal. nuclei, Galaxies: IR, Spectra: optical, Radio sources, Redshifts, Equivalent widths, Radial velocities, Photometry: SDSS, Cross identifications

 

VizieR Online Data Catalog: Activity types of ROSAT/SDSS galaxies (Paronyan+, 2019). G. M. Paronyan, A. M. Mickaelian, G. S. Harutyunyan, H. V. Abrahamyan, G. A. Mikayelyan, and G. V. Gyulzadyan. VizieR Online Data Catalog (other), 160, 2019. [ ADS ]

Keywords: Active gal. nuclei, Cross identifications, Equivalent widths, X-ray sources, Radial velocities, Photometry: infrared, Radio sources, Spectra: optical

 

The Extremely Long Magnetic Period of Przybylski's Star. S. Hubrig, V. D. Bychkov, L. V. Bychkova, S. P. Järvinen, J. Madej, I. Ilyin, and M. Schöller. In D. O. Kudryavtsev, I. I. Romanyuk, and I. A. Yakunin, editors, Physics of Magnetic Stars, volume 518 of Astronomical Society of the Pacific Conference Series, page 27, 2019. [ ADS ]

 

Observations of Magnetic Fields in Herbig Ae/Be Stars. S. Hubrig, S. P. Järvinen, M. Schöller, T. A. Carroll, I. Ilyin, and M. A. Pogodin. In D. O. Kudryavtsev, I. I. Romanyuk, and I. A. Yakunin, editors, Physics of Magnetic Stars, volume 518 of Astronomical Society of the Pacific Conference Series, page 18, 2019. [ arXiv | ADS ]

 

VizieR Online Data Catalog: HD 96446 radial velocities (Gonzalez+, 2019). J. F. Gonzalez, M. Briquet, N. Przybilla, M.-F. Nieva, P. De Cat, S. Saesen, S. Hubrig, A. Thoul, P. I. Papics, L. Palaversa, D. Naef, M. Neveu-van Malle, S. Jarvinen, K. R. Pollard, P. Kilmartin, N. Mowlavi, and K. Butler. VizieR Online Data Catalog, 362, 2019. [ ADS ]

Keywords: Binaries: spectroscopic, Radial velocities

 

Magnetic activity of the young solar analog V1358 Orinis. L. Kriskovics, Z. Kovári, K. Vida, K. Oláh, T. A. Carroll, and T. Granzer. A&A, 627:A52, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: activity, stars: imaging, starspots, stars: individual: V1358 Ori

 

HD 96446: a long-period binary with a strongly magnetic He-rich primary with β Cephei pulsations. J. F. González, M. Briquet, N. Przybilla, M.-F. Nieva, P. De Cat, S. Saesen, S. Hubrig, A. Thoul, P. I. Pápics, L. Palaversa, D. Naef, M. Neveu-Van Malle, S. Järvinen, K. R. Pollard, P. Kilmartin, N. Mowlavi, and K. Butler. A&A, 626:A94, 2019. [ DOI | ADS ]

Keywords: binaries: spectroscopic, stars: chemically peculiar, stars: early-type, stars: magnetic field, stars: oscillations, stars: individual: HD 96446

 

Evidence of New Magnetic Transitions in Late-type Dwarfs from Gaia DR2. A. C. Lanzafame, E. Distefano, S. A. Barnes, and F. Spada. ApJ, 877:157, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: evolution, stars: late-type, stars: magnetic field, stars: rotation

 

Mapping M Dwarf Metallicities. V. DiTomasso and S. J. Schmidt. In The Gaia Universe, page 23, 2019. [ DOI | ADS ]

 

Exploring the Age-dependent Properties of M and L Dwarfs Using Gaia and SDSS. R. Kiman, S. J. Schmidt, R. Angus, K. L. Cruz, J. K. Faherty, and E. Rice. AJ, 157:231, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: activity, stars: kinematics and dynamics, stars: low-mass

 

Magnetism in the Brown Dwarf Regime. M. Kao, J. S. Pineda, P. Williams, R. Yadav, D. Shulyak, J. Saur, D. J. Stevenson, S. Schmidt, A. Burgasser, G. Hallinan, and K. Cruz. In Bulletin of the American Astronomical Society, volume 51 of BAAS, page 484, 2019. [ ADS ]

 

VizieR Online Data Catalog: HD199178 1994-2017 spectra (Hackman+, 2019). T. Hackman, I. Ilyin, J. J. Lehtinen, O. Kochukhov, M. J. Kaepylae, N. Piskunov, and T. Willamo. VizieR Online Data Catalog, 362, 2019. [ ADS ]

Keywords: Stars: late-type, Spectroscopy

 

The two magnetic components in the Herbig Ae SB2 system HD 104237. S. P. Järvinen, T. A. Carroll, S. Hubrig, I. Ilyin, M. Schöller, N. A. Drake, and M. A. Pogodin. MNRAS, 486:5499, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: individual: HD 104237, stars: magnetic field, stars: pre-main-sequence, stars: variables: T Tauri, Herbig Ae/Be

 

Activity Types of Galaxies Selected from HRC/BHRC Sample. G. M. Paronyan, A. M. Mickaelian, G. S. Harutyunyan, H. V. Abrahamyan, and G. A. Mikayelyan. Astrophysics, 62:147, 2019. [ DOI | ADS ]

Keywords: AGN, X-ray, spectral classification, HRC/BHRC, X-ray AGN

 

Starspot activity of HD 199178. Doppler images from 1994-2017. T. Hackman, I. Ilyin, J. J. Lehtinen, O. Kochukhov, M. J. Käpylä, N. Piskunov, and T. Willamo. A&A, 625:A79, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: activity, starspots, stars: late-type, stars: imaging, stars: individual: HD 199178

 

The Largest M Dwarf Flares from ASAS-SN. S. J. Schmidt, B. J. Shappee, J. L. van Saders, K. Z. Stanek, J. S. Brown, C. S. Kochanek, S. Dong, M. R. Drout, S. Frank, T. W.-S. Holoien, S. Johnson, B. F. Madore, J. L. Prieto, M. Seibert, M. K. Seidel, and G. V. A. Simonian. ApJ, 876:115, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: chromospheres, stars: late-type, stars: low-mass

 

Warm and cool starspots with opposite polarities. A high-resolution Zeeman-Doppler-Imaging study of II Pegasi with PEPSI. K. G. Strassmeier, T. A. Carroll, and I. V. Ilyin. A&A, 625:A27, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: imaging, stars: activity, starspots, stars: individual: II Peg

 

VizieR Online Data Catalog: II Pegasi spectra with PEPSI (Strassmeier+, 2019). K. G. Strassmeier, T. A. Carroll, and I. V. Ilyin. VizieR Online Data Catalog, 362, 2019. [ ADS ]

Keywords: Stars: variable, Spectroscopy

 

VizieR Online Data Catalog: K2 ultracool dwarfs survey. III. M6-L0 flares (Paudel+, 2018). R. R. Paudel, J. E. Gizis, D. J. Mullan, S. J. Schmidt, A. J. Burgasser, P. K. G. Williams, and E. Berger. VizieR Online Data Catalog, 185, 2019. [ ADS ]

Keywords: Stars: flare, Stars: L-type, Stars: distances, Stars: brown dwarf

 

K2 Ultracool Dwarfs Survey - V. High superflare rates on rapidly rotating late-M dwarfs. R. R. Paudel, J. E. Gizis, D. J. Mullan, S. J. Schmidt, A. J. Burgasser, P. K. G. Williams, A. Youngblood, and K. G. Stassun. MNRAS, 486:1438, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: activity, stars: flare, stars: individual: (2MASS J08371832+2050349, 2MASS J08315742+2042213, 2MASS J08312608+2244586, TRAPPIST-1), stars: low-mass

 

Surface magnetic activity of the fast-rotating G5 giant IN Comae, central star of the faint planetary nebula LoTr 5. Z. Kovári, K. G. Strassmeier, K. Oláh, L. Kriskovics, K. Vida, T. A. Carroll, T. Granzer, I. Ilyin, J. Jurcsik, E. Kovári, and M. Weber. A&A, 624:A83, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: activity, stars: imaging, stars: late-type, stars: individual: IN Com, starspots

 

VizieR Online Data Catalog: HAT-P-32b differential photometry time series (Mallonn+, 2019). M. Mallonn, J. Koehler, X. Alexoudi, C. von Essen, T. Granzer, K. Poppenhaeger, and K. G. Strassmeier. VizieR Online Data Catalog, 362, 2019. [ ADS ]

Keywords: Stars: double and multiple, Exoplanets, Photometry

 

Low albedos of hot to ultra-hot Jupiters in the optical to near-infrared transition regime. M. Mallonn, J. Köhler, X. Alexoudi, C. von Essen, T. Granzer, K. Poppenhaeger, and K. G. Strassmeier. A&A, 624:A62, 2019. [ DOI | arXiv | ADS ]

Keywords: methods: observational, techniques: photometric, planets and satellites: fundamental parameters

 

The PDS 110 observing campaign - photometric and spectroscopic observations reveal eclipses are aperiodic. H. P. Osborn, M. Kenworthy, J. E. Rodriguez, E. J. W. de Mooij, G. M. Kennedy, H. Relles, E. Gomez, M. Hippke, M. Banfi, L. Barbieri, I. S. Becker, P. Benni, P. Berlind, A. Bieryla, G. Bonnoli, H. Boussier, S. M. Brincat, J. Briol, M. R. Burleigh, T. Butterley, M. L. Calkins, P. Chote, S. Ciceri, M. Deldem, V. S. Dhillon, E. Dose, F. Dubois, S. Dvorak, G. A. Esquerdo, D. F. Evans, S. Ferratfiat, S. J. Fossey, M. N. Günther, J. Hall, F.-J. Hambsch, E. Herrero, K. Hills, R. James, R. Jayawardhana, S. Kafka, T. L. Killestein, C. Kotnik, D. W. Latham, D. Lemay, P. Lewin, S. Littlefair, C. Lopresti, M. Mallonn, L. Mancini, A. Marchini, J. J. McCormac, G. Murawski, G. Myers, R. Papini, V. Popov, U. Quadri, S. N. Quinn, L. Raynard, L. Rizzuti, J. Robertson, F. Salvaggio, A. Scholz, R. Sfair, A. M. S. Smith, J. Southworth, T. G. Tan, S. Vanaverbeke, E. O. Waagen, C. A. Watson, R. G. West, O. C. Winter, P. J. Wheatley, R. W. Wilson, and G. Zhou. MNRAS, 485:1614, 2019. [ DOI | arXiv | ADS ]

Keywords: protoplanetary discs, stars: individual:PDS 110, stars: variables: T Tauri, Herbig Ae/Be

 

A short and sudden increase of the magnetic field strength and the accompanying spectral variability in the O9.7 V star HD 54879. S. Hubrig, M. Küker, S. P. Järvinen, A. F. Kholtygin, M. Schöller, E. B. Ryspaeva, and D. D. Sokoloff. MNRAS, 484:4495, 2019. [ DOI | arXiv | ADS ]

Keywords: MHD, stars: atmospheres, stars: early-type, stars: individual: HD 54879, stars: magnetic field, stars: variables: general

 

Spectangular: Disentangling variable spectra. D. P. Sablowski, S. Järvinen, and M. Weber. A&A, 623:A31, 2019. [ DOI | arXiv | ADS ]

Keywords: techniques: spectroscopic, binaries: spectroscopic, binaries: eclipsing, methods: observational

 

Carbon 12C/13C isotope ratio of α Aurigae revised. D. P. Sablowski, S. Järvinen, I. Ilyin, and K. G. Strassmeier. A&A, 622:L11, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: evolution, binaries: spectroscopic, methods: observational, techniques: spectroscopic

 

Long-term spot monitoring of the young solar analogue V889 Herculis*. T. Willamo, T. Hackman, J. J. Lehtinen, M. J. Käpylä, I. Ilyin, G. W. Henry, L. Jetsu, O. Kochukhov, and N. Piskunov. A&A, 622:A170, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: activity, starspots, stars: solar-type, stars: individual: HD 171488

 

VizieR Online Data Catalog: V-band differential photometry for V889 Her (Willamo+, 2019). T. Willamo, T. Hackman, J. J. Lehtinen, M. J. Kapyla, I. Ilyin, G. W. Henry, L. Jetsu, O. Kochukhov, and N. Piskunov. VizieR Online Data Catalog, 362, 2019. [ ADS ]

Keywords: Stars: variable, Photometry

 

Flares in open clusters with K2 . I. M 45 (Pleiades), M 44 (Praesepe), and M 67. E. Ilin, S. J. Schmidt, J. R. A. Davenport, and K. G. Strassmeier. A&A, 622:A133, 2019. [ DOI | arXiv | ADS ]

Keywords: methods: data analysis, stars: activity, stars: flare, stars: low-mass

 

Spectroscopic membership for the populous 300 Myr-old open cluster NGC 3532***. D. J. Fritzewski, S. A. Barnes, D. J. James, A. M. Geller, S. Meibom, and K. G. Strassmeier. A&A, 622:A110, 2019. [ DOI | arXiv | ADS ]

Keywords: techniques: radial velocities, stars: abundances, stars: kinematics and dynamics, stars: late-type, open clusters and associations: individual: NGC 3532, Galaxy: stellar content

 

VizieR Online Data Catalog: 15 hot Jupiter exoplanets light curves (Mallonn+, 2019). M. Mallonn, C. von Essen, E. Herrero, X. Alexoudi, T. Granzer, M. Sosa, K. G. Strassmeier, G. Bakos, D. Bayliss, R. Brahm, M. Bretton, F. Campos, L. Carone, K. D. Colon, H. A. Dale, D. Dragomir, N. Espinoza, P. Evans, F. Garcia, S.-H. Gu, P. Guerra, Y. Jongen, A. Jordan, W. Kang, E. Keles, T. Kim, M. Lendl, D. Molina, M. Salisbury, F. Scaggiante, A. Shporer, R. Siverd, E. Sokov, I. Sokova, and A. Wuensche. VizieR Online Data Catalog, 362, 2019. [ ADS ]

Keywords: Stars: double and multiple, Exoplanets, Photometry

 

The Near-ultraviolet Continuum Radiation in the Impulsive Phase of HF/GF-type dMe Flares. I. Data. A. F. Kowalski, J. P. Wisniewski, S. L. Hawley, R. A. Osten, A. Brown, C. Fariña, J. A. Valenti, S. Brown, M. Xilouris, S. J. Schmidt, and C. Johns-Krull. ApJ, 871:167, 2019. [ DOI | ADS ]

Keywords: stars: flare

 

Ephemeris refinement of 21 hot Jupiter exoplanets with high timing uncertainties. M. Mallonn, C. von Essen, E. Herrero, X. Alexoudi, T. Granzer, M. Sosa, K. G. Strassmeier, G. Bakos, D. Bayliss, R. Brahm, M. Bretton, F. Campos, L. Carone, K. D. Colón, H. A. Dale, D. Dragomir, N. Espinoza, P. Evans, F. Garcia, S.-H. Gu, P. Guerra, Y. Jongen, A. Jordán, W. Kang, E. Keles, T. Kim, M. Lendl, D. Molina, M. Salisbury, F. Scaggiante, A. Shporer, R. Siverd, E. Sokov, I. Sokova, and A. Wünsche. A&A, 622:A81, 2019. [ DOI | ADS ]

Keywords: methods: observational, techniques: photometric, planets and satellites: fundamental parameters

 

An optical transmission spectrum of the ultra-hot Jupiter WASP-33 b. First indication of aluminum oxide in an exoplanet. C. von Essen, M. Mallonn, L. Welbanks, N. Madhusudhan, A. Pinhas, H. Bouy, and P. Weis Hansen. A&A, 622:A71, 2019. [ DOI | ADS ]

Keywords: asteroseismology, instrumentation: spectrographs, methods: data analysis, methods: observational, planets and satellites: composition, planets and satellites: atmospheres

 

Measuring Rotation Periods and Flare Rates for K2 M Dwarfs. M. Popinchalk, J. K. Faherty, S. J. Schmidt, R. Angus, K. Cruz, E. Rice, R. Kiman, and E. Schwab. In American Astronomical Society Meeting Abstracts #233, volume 233 of American Astronomical Society Meeting Abstracts, page #259.10, 2019. [ ADS ]

 

Atmospheric Dynamics and the Variable Transit of KELT-9 b. P. W. Cauley, E. L. Shkolnik, I. Ilyin, K. G. Strassmeier, S. Redfield, and A. Jensen. 157:69, 2019. [ DOI | arXiv | ADS ]

Keywords: planets and satellites: atmospheres, planets and satellites: composition, stars: flare

 

Cycle period, differential rotation, and meridional flow for early M dwarf stars. M. Küker, G. Rüdiger, K. Olah, and K. G. Strassmeier. A&A, 622:A40, 2019. [ DOI | arXiv | ADS ]

Keywords: stars: late-type, stars: magnetic field, stars: activity, magnetohydrodynamics (MHD), turbulence

 

VizieR Online Data Catalog: Photometric timeseries and timing data (Maciejewski+, 2018). G. Maciejewski, M. Fernandez, F. Aceituno, S. Martin-Ruiz, J. Ohlert, D. Dimitrov, K. Szyszka, C. Vonessen, M. Mugrauer, R. Bischoff, K.-U. Michel, M. Mallonn, M. Stangret, and D. Mozdzierski. VizieR Online Data Catalog, 1206, 2019. [ ADS ]

Keywords: Stars: double and multiple, Exoplanets, Photometry

 

VizieR Online Data Catalog: Photometry and RV follow-up observations of K2-18 (Sarkis+, 2018). P. Sarkis, T. Henning, M. Kurster, T. Trifonov, M. Zechmeister, L. Tal-Or, G. Anglada-Escude, A. P. Hatzes, M. Lafarga, S. Dreizler, I. Ribas, J. A. Caballero, A. Reiners, M. Mallonn, J. C. Morales, A. Kaminski, J. Aceituno, P. J. Amado, V. J. S. Bejar, H.-J. Hagen, S. Jeffers, A. Quirrenbach, R. Launhardt, C. Marvin, and D. Montes. VizieR Online Data Catalog, 515, 2019. [ ADS ]

Keywords: Stars: nearby, Stars: dwarfs, Stars: M-type, Photometry: UBVRI, Radial velocities, Spectroscopy, Exoplanets

 

Finding age relations for low mass stars using magnetic activity and kinematics. R. Kiman, S. J. Schmidt, R. Angus, K. Cruz, J. Faherty, and E. Rice. In American Astronomical Society Meeting Abstracts #233, volume 233 of American Astronomical Society Meeting Abstracts, page #259.15, 2019. [ ADS ]

 

Abundance Systematics in Herbig Ae/Be Stars. C. Cowley, S. Hubrig, S. Jarvinen, and R. Monier. In American Astronomical Society Meeting Abstracts #233, volume 233 of American Astronomical Society Meeting Abstracts, page #168.01, 2019. [ ADS ]

 

Poster Winner of the 2018 Beth Brown Memorial Award: Finding Flares on M Dwarfs with ASAS-SN. R. Rodríguez-Martínez, L. A. Lopez, B. Shappee, and S. J. Schmidt. In American Astronomical Society Meeting Abstracts #233, volume 233 of American Astronomical Society Meeting Abstracts, page #259.45, 2019. [ ADS ]

 

Using APOGEE and Gaia to Probe the Galaxy With K and M Dwarfs. S. J. Schmidt and J. Johnson. In American Astronomical Society Meeting Abstracts #233, volume 233 of American Astronomical Society Meeting Abstracts, page #235.05, 2019. [ ADS ]