Depletion of Bright Red Giants in the Galactic Center during Its Active Phases
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00539781" target="_blank" >RIV/67985815:_____/20:00539781 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-4357/abbd94" target="_blank" >https://doi.org/10.3847/1538-4357/abbd94</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/abbd94" target="_blank" >10.3847/1538-4357/abbd94</a>
Alternative languages
Result language
angličtina
Original language name
Depletion of Bright Red Giants in the Galactic Center during Its Active Phases
Original language description
Observations in the near-infrared domain showed the presence of the flat core of bright late-type stars inside similar to 0.5 pc from the Galactic center supermassive black hole (Sgr A*), while young massive OB/Wolf-Rayet stars form a cusp. Several dynamical processes were proposed to explain this apparent paradox of the distribution of the Galactic center stellar populations. Given the mounting evidence on the significantly increased activity of Sgr A* during the past million years, we propose a scenario based on the interaction between the late-type giants and a nuclear jet, whose past existence and energetics can be inferred from the presence of gamma-ray Fermi bubbles and bipolar radio bubbles. Extended, loose envelopes of red giant stars can be ablated by the jet with kinetic luminosity in the range of L-j 10(41)-10(44) erg s(-1) within the inner similar to 0.04 pc of Sgr A* (S-cluster region), which would lead to their infrared luminosity decrease after several thousand jet-star interactions. The ablation of the atmospheres of red giants is complemented by the process of tidal stripping that operates at distances of less than or similar to 1 mpc, and by the direct mechanical interaction of stars with a clumpy disk at greater than or similar to 0.04 pc, which can explain the flat density profile of bright late-type stars inside the inner half parsec from Sgr A*.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA20-19854S" target="_blank" >GA20-19854S: Particle Acceleration Studies in Astrophysical Jets</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
1538-4357
e-ISSN
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Volume of the periodical
903
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
18
Pages from-to
140
UT code for WoS article
000588836700001
EID of the result in the Scopus database
2-s2.0-85096610046