Dusan Tubin

Welcome! I am Dusán Tubín Arenas, a Chilean Ph.D. student at the Leibniz-Institut für Astrophysik Potsdam (AIP).

My research focuses on high-energy astrophysics, mainly with the extended ROentgen Survey with an Imaging Telescope Array (eROSITA) and XMM-Newton X-ray missions. During my Ph.D., I will lead the search for supermassive black hole binary systems!

Feel free to contact me at dtubin@aip.de
Twitter: @DusanTubin

X-ray Astronomy

Doctoral Candidate

Office: SH/230.2
Phone: +49 331 7499 372
dtubin@aip.de

Leibniz-Institut
für Astrophysik Potsdam (AIP)
An der Sternwarte 16
14482 Potsdam

Research Interests:

I started studying active galactic nuclei (AGN) during my bachelor's degree at Pontificia Universidad Católica de Chile. Throughout my master's, I published my first first-author scientific publication, where we analyzed the optical/near-IR VLT/MUSE data of the particularly "happy" dual AGN, Mrk 739 (see image below).
I have always been interested in the field of galaxy evolution and the astrophysics behind AGN activity, pairs of supermassive black holes, star formation, and galaxy mergers. Now during my Ph.D., I have the chance to keep studying and searching for these fascinating and elusive supermassive black hole pairs!

Mrk 739: Mrk 739 is a nearby dual AGN galaxy whose projected nuclear separation is ~ 3.4 kpc. We analyzed the Multi Unit Spectroscopic Explorer (MUSE) at the Very Large Telescope (VLT) data. We found that the galaxy has an extended AGN-ionized emission-line region while star-forming regions are close to the nuclei. The morphology and dynamics of the dual AGN Mrk 739 are consistent with an early stage of the collision, where the foreground galaxy (Mrk 739W) is a young star-forming galaxy in an ongoing first passage with its background companion (Mrk 739E). Link to the publication: https://iopscience.iop.org/article/10.3847/1538-4357/abedba

Reconstructed VLT/MUSE image of dual AGN galaxy Mrk 739.
Credit: D. Tubín/ESO

The eROSITA upper limit server: Currently, I am leading the implementation of the eROSITA upper limit server, which will be a platform where users can retrieve X-ray flux upper limits and photometric products from the eROSITA observations that belong to the German consortium.

Searching supermassive black hole binaries: My Ph.D. project consists of searching for the presence of pairs of supermassive black holes at the center of galaxies with sub-pc separation using X-ray observations from eROSITA, NICER, Swift, and XMM-Newton missions.

Publications

Publications at NASA ADS: ADS library

Latest refereed publications, retrieved from NASA ADS:

Complex AGN feedback in the Teacup galaxy. A powerful ionised galactic outflow, jet-ISM interaction, and evidence for AGN-triggered star formation in a giant bubble

Venturi, G., ... Tubín, D., 2023
Astronomy and Astrophysics, 678, A127; published October 2023

doi:10.1051/0004-6361/202347375, NASA ADS

Participating AIP sections and groups: Galaxies and Quasars / X-ray Astronomy

Serendipitous discovery of the magnetic cataclysmic variable SRGE J075818−612027

Ok, S., Lamer, G., Schwope, A., ... Kurpas, J., Tubín, D., Traulsen, I., 2023
Astronomy and Astrophysics, 672, A188; published April 2023

doi:10.1051/0004-6361/202345966, NASA ADS

Participating AIP sections and groups: Galaxies and Quasars / X-ray Astronomy

XMM-Newton and SRG/eROSITA observations of the isolated neutron star candidate 4XMM J022141.5−735632

Pires, A. M., ... Kurpas, J., Schwope, A. D., ... Traulsen, I., Tubín, D., ..., 2022
Astronomy and Astrophysics, 666, A148; published October 2022

doi:10.1051/0004-6361/202244514, NASA ADS

Participating AIP sections and groups: Galaxies and Quasars / X-ray Astronomy

Detailed Accretion History of the Supermassive Black Hole in NGC 5972 over the Past ≳10⁴ yr through the Extended Emission-line Region

Finlez, C., ... Tubín, D., ..., 2022
The Astrophysical Journal, 936, 1, 88; published September 2022

doi:10.3847/1538-4357/ac854e, NASA ADS

Participating AIP sections and groups: Galaxies and Quasars / X-ray Astronomy