Missing bright red giants in the Galactic center: A fingerprint of its once active state?

0539458 - ASÚ 2022 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Zajaček, Michal - Araudo, Anabella - Karas, Vladimír - Czerny, B. - Eckart, A. - Suková, Petra - Štolc, Marcel - Witzany, V.
Missing bright red giants in the Galactic center: A fingerprint of its once active state?
Proceedings of RAGtime 20/22: Workshops on black holes and neutron stars. Opava: Silesian University, 2020, s. 357-374. ISBN 978-80-7510-433-5. E-ISSN 2336-5676.
[RAGtime /20.-22./. Opava (CZ), 15.10.2018-19.10.2018]
Grant CEP: GA MŠMT LTI17018; GA MŠMT(CZ) 8J20PL037
Institucionální podpora: RVO:67985815
Klíčová slova: galaxy center * supergiants * jets
Obor OECD: Astronomy (including astrophysics,space science)
http://proceedings.physics.cz/images/proc21/zaj.pdf

We propose a novel scenario for the bright red-giant depletion based onthe collisions between red giants and the nuclear jet, which was likely active in the Galactic center a few million years ago and could have led to the formation of the large-scaleγ-ray Fermi bubbles. The process of the jet-induced ablation of red giants appears to be most efficient within∼0.04 pc(S-cluster), while at larger distances it was complemented by star–accretion disc collisions and at smaller scales, tidal stripping operated. These three mechanisms likely operated simultaneously and createdan apparent core of late-type stars within∼0.5 pc.
Trvalý link: http://hdl.handle.net/11104/0317197