KECK OBSERVATIONS OF THE GALACTIC CENTER SOURCE G2: GAS CLOUD OR STAR?
نویسندگان
چکیده
منابع مشابه
Keck Observations of the Galactic Center Source G2: Gas Cloud or Star?
We present new observations and analysis of G2 – the intriguing red emission-line object which is quickly approaching the Galaxy’s central black hole. The observations were obtained with the laser guide star adaptive optics systems on the W. M. Keck I and II telescopes and include spectroscopy (R ∼ 3600) centered on the Hydrogen Brγ line as well as K ′ (2.1 μm) and L (3.8 μm) imaging. Analysis ...
متن کاملo - ph . G A ] 2 4 A pr 2 01 3 Keck Observations of the Galactic Center Source G 2 : Gas Cloud or Star ?
We present new observations and analysis of G2 – the intriguing red emission-line object which is quickly approaching the Galaxy’s central black hole. The observations were obtained with the laser guide star adaptive optics systems on the W. M. Keck I and II telescopes and include spectroscopy (R ∼ 3600) centered on the Hydrogen Brγ line as well as K ′ (2.1 μm) and L (3.8 μm) imaging. Analysis ...
متن کاملSpatially Resolved Observations of the Galactic Center Source , IRS 21
We present diffraction-limited 2-25 µm images obtained with the W. M. Keck 10-m telescopes that spatially resolve the cool source, IRS 21, one of a small group of enigmatic objects in the central parsec of our Galaxy that have eluded classification. Modeled as a Gaussian, the azimuthally-averaged intensity profile of IRS 21 has a half-width half-maximum (HWHM) size of 650±80 AU at 2.2 µm and an...
متن کاملDetection of Galactic Center Source G2 at 3.8 Microns during Periapse Passage
We report new observations of the Galactic Center source G2 from the W. M. Keck Observatory. G2 is a dusty red object associated with gas that shows tidal interactions as it nears closest approach with the Galaxy’s central black hole. Our observations, conducted as G2 passed through periapse, were designed to test the proposal that G2 is a 3 earth mass gas cloud. Such a cloud should be tidally ...
متن کاملSWS observations of the Galactic center
We present a 2.4–45 m spectrum of the center of our Galaxy obtained with the Short Wavelength Spectrometer (SWS) on board ISO. The wide range of ionic fine structure lines observed yields an average effective temperature for the ionizing stars of 35000 K, with a small contribution of significantly hotter stars, consistent with ageing of an active period of massive star formation that took place...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2013
ISSN: 2041-8205,2041-8213
DOI: 10.1088/2041-8205/773/1/l13