Název: Infrared-excess Source DSO/G2 Near the Galactic Center: Theory vs. Observations
Autoři: Zajaček, M. ; Eckart, A. ; Peissker, F. ; Karssen, G. ; Karas, Vladimír
Typ dokumentu: Příspěvky z konference
Konference/Akce: Week of Doctoral Students, Prague (CZ), 20150604
Rok: 2015
Jazyk: eng
Abstrakt: Based on the monitoring of the Dusty S-cluster Object (DSO/G2) during its closest approach to the Galactic Center supermassive black hole in 2014 and 2015 with ESO VLT/SINFONI, we further explore the model of a young, accreting star to explain observed spectral and morphological features. The stellar scenario is supported by our ndings, i.e., ionized-hydrogen emission from the DSO that remains spatially compact before and after the peribothron passage. The detection of DSO/G2 object as a compact single-peak emission-line source is not consistent with the original hypothesis of a core-less cloud that is necessarily tidally stretched, hence producing a double-peak emission line prole around the pericentre passage. This strengthens the evidence that the DSO/G2 source is a dust-enshrouded young star that appears to be in an accretion phase. The infall of material from the circumstellar disc onto the stellar surface can contribute signicantly to the emission of Br line as well as the observed large line width of the order of 10 angstrom.
Klíčová slova: galactic centre
Zdrojový dokument: WDS 2015: Proceedings of Contributed Papers: Physics, ISBN 9788073783112

Instituce: Astronomický ústav AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný na externích webových stránkách.
Externí umístění souboru: https://hera.ph1.uni-koeln.de/~zajacek/WDS15_04_f1_Zajacek.pdf
Původní záznam: http://hdl.handle.net/11104/0255836

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-201464


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