Splinter Meeting Stellar
Stellar Interactions
Time: Thursday September 24, 14:00-18:00 and Friday September 25, 09:00-13:00 and 14:00-18:00 CEST (UTC+2)
Room: virtual room M
Convenor(s): S. Geier [1], E. Günther [2], K. Poppenhäger [3], N. Reindl [1], V. Schaffenroth [1], H. Todt [1]
[1] U Potsdam, [2] TLS Tautenburg, [3] AIP
Stars are not formed in isolation. Their nurseries are large clouds of gas where they are born together interacting with each other and the material around them. Also in the later stages of their evolution various stellar interactions are common and important for many fields of astrophysics.
More than half of all stars have one of more companions and a significant fraction of those will at some point interact with each other. Those interactions can be rather gentle effects like irradiation or tidal deformation. But they can also be quite dramatic. Stars can transfer significant amounts of mass, swallow each other and form a common envelope or even merge altogether forming a single object. In the most extreme cases the mergers of stellar remnants can be detected as
gravitational wave sources or gamma ray bursts. Close encounters of stars with supermassive black holes can eject stars out of their host galaxies or lead to tidal disruptions of the stars observed as transients.
Stars are not only interacting with each other, but also with their environment. Massive stars and stars in the late phases of their evolution lose significant amounts of mass via stellar winds and enrich the interstellar medium with nuclear processed material. Stellar
explosions create shock waves and deposit large amounts of energy sometimes triggering the formation of new stars.
Stars also interact with the planetary systems around them in various ways. Tidal or magnetic interaction with Hot Jupiters can be expected through analogies to stellar binaries. Furthermore, stars can influence
the gaseous atmospheres of their planets significantly. Especially in young systems the intense high-energy flux of the star may heat and evaporate the planetary atmosphere in part or even completely.
In this splinter session we aim at gathering an interdisciplinary group of experts to discuss most recent developments in the broad field of
stellar interactions, share ideas and maybe form new collaborations.
Program
Thursday September 24, 14:00-18:00 Stellar Interactions - Session I (virtual room M)
14:00 | Welcome |
Wide Binaries |
14:05 | Koushik Sen: |
Case A mass transfer: A comprehensive study of their observable stellar properties |
14:23 | Ingrid Pelisoli: |
Observational evidence that binary interaction is always required to form hot subdwarf stars |
14:41 | Joris Vos: |
The impact of Galactic evolution on binary interactions, as shown in hot subdwarf binaries. |
14:59 | Olga Lebiga: |
Investigating the effect of a circumbinary disk on Main Sequence star abundance patterns |
15:17 | Mathieu Renzo: |
Kinematic and cosmetic consequences of (massive) binary interactions |
15:35 | Javier Alcolea: |
The new orbital paramaters of the R Aqr symbiotic system |
15:53 | Break |
16:23 | Jane Pratt: |
Convective overshooting in hydrodynamic simulations of the F-type eclipsing binary BW Aquarii |
Surveys/Catalogs |
16:41 | Thomas Kupfer: |
Treasures from the Zwicky Transient Facility Galactic Plane observations |
16:59 | Harry Dawson: |
The First Volume-Limited Complete Catalogue of Hot Subdwarf Stars |
17:17 | Jaroslav Merc: |
Characterizing the symbiotic population using the Gaia data |
17:35 | Richard Culpan: |
A Catalogue of Blue Horizontal Branch Stars from Gaia DR2 |
17:53 | End |
Friday September 25, 09:00-13:00 Stellar Interactions - Session II (virtual room M)
09:15 | Welcome |
Star-Planet |
09:20 | J. D. Alvarado-Gómez: |
Eruptive events in active stars: Lessons from numerical simulations |
09:38 | Nikoleta Ilic: |
Measuring the tidal interaction footprint on stellar magnetic activity in star-planet systems |
09:56 | Grace Foster: |
The corona of GJ 1151 in the context of star-planet interaction |
10:14 | Friedrich Röpke: |
Formation of sdB stars in common envelope interaction with substellar companions |
10:32 | Veronika Schaffenroth: |
A quantitative in-depth analysis of the prototype sdB+BD system SDSS J08205+0008 |
10:50 | Break |
Stellar populations |
11:20 | N. Castro: |
MYMST: Mapping the Youngest and most Massive Stars in the Tarantula nebula |
11:38 | Andreas Sander: |
On the nature of WR-type mass loss in different environments |
11:56 | Varsha Ramachandran: |
Massive star feedback in the Magellanic Clouds and the Bridge |
12:14 | Ekaterina Ilin: |
From ZAMS to solar age: Calibrating the flaring-age-mass relation in open clusters |
12:32 | Banafsheh Shahzamanian: |
Large-scale proper motion study of the Galactic Centre |
12:50 | Break |
Friday September 25, 14:00-18:00 Stellar Interactions - Session III (virtual room M)
14:00 | Welcome |
Merger/Common envelope |
14:05 | Christian Sand: |
Common-envelope evolution of an AGB star |
14:23 | Henri Boffin: |
Post-common-envelope binary central star in planetary nebulae |
14:41 | Nicole Reindl: |
An in-depth reanalysis of the alleged type Ia supernova progenitor Henize 2-428 |
14:59 | Fiona Prodöhl: |
Studying the atmosphere of the close binary star system AADor with PHOENIX/3D |
15:17 | Aldana Grichener: |
High-Energy Neutrino Emission From Common Envelope Jets Supernova (CEJSN) impostors |
15:35 | Fabian Schneider: |
Stellar mergers as the origin of magnetic massive stars |
15:53 | Break |
Supernovae/Transients |
16:23 | Eva Laplace: |
How being single or stripped in a binary affects the death of massive stars |
16:41 | Amir Michaelis: |
3d simulations of the later phase of a merger-burst ILOT |
16:59 | Alexey Bobrick: |
White Dwarf Neutron Star Binaries and the Transients they Produce |
17:35 | Lieke van Son: |
Can Massive stars produce BHs with masses in the Pair-Instability Mass Gap? |
17:53 | Goodbye/End |
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