Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21810808r&link_type=abstract
American Astronomical Society, AAS Meeting #218, #108.08; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We present results from our spectroscopic study, using the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope, designed to identify massive young stellar objects (YSOs) in the Galactic Center (GC). Our sample of 107 YSO candidates was selected based on IRAC colors from the high spatial resolution, high sensitivity Spitzer/IRAC images of the central 300 pc of the Milky Way Galaxy. We obtained IRS spectra over 5 um to 35 um using both high- and low-resolution IRS modules. We spectroscopically identify massive YSOs by the presence of a 15.4 um shoulder on the absorption profile of 15um CO2 ice, suggestive of CO2 ice mixed with CH3OH ice on grains. This 15.4 um shoulder is clearly observed in 16 sources and possibly observed in an additional 19 sources. We show that 9 massive YSOs also reveal molecular gas-phase absorption from CO2, C2H2, and/or HCN, which traces warm and dense gas in YSOs. Our results provide the first infrared spectroscopic census of the massive YSO population in the GC.
An Deokkeun
Arendt Richard G.
Boogert Adwin
Cotera Angela
Ramirez Solange S.
No associations
LandOfFree
Spectroscopic Identification of Massive Young Stellar Objects in the Galactic Center does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spectroscopic Identification of Massive Young Stellar Objects in the Galactic Center, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopic Identification of Massive Young Stellar Objects in the Galactic Center will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1736417