Original title: Infrared-excess Source DSO/G2 Near the Galactic Center: Theory vs. Observations
Authors: Zajaček, M. ; Eckart, A. ; Peissker, F. ; Karssen, G. ; Karas, Vladimír
Document type: Papers
Conference/Event: Week of Doctoral Students, Prague (CZ), 20150604
Year: 2015
Language: eng
Abstract: 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.
Keywords: galactic centre
Host item entry: WDS 2015: Proceedings of Contributed Papers: Physics, ISBN 9788073783112

Institution: Astronomical Institute AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: https://hera.ph1.uni-koeln.de/~zajacek/WDS15_04_f1_Zajacek.pdf
Original record: http://hdl.handle.net/11104/0255836

Permalink: http://www.nusl.cz/ntk/nusl-201464


The record appears in these collections:
Research > Institutes ASCR > Astronomical Institute
Conference materials > Papers