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DISCOVERY OF MASSIVE YOUNG STELLAR OBJECTS IN THE GALACTIC CENTER WITH WARM CO$_2$ GAS ABSORPTION

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/38040

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Title: DISCOVERY OF MASSIVE YOUNG STELLAR OBJECTS IN THE GALACTIC CENTER WITH WARM CO$_2$ GAS ABSORPTION
Creators: An, Deokkeun; Ramirez, Solange; Sellgren, Kris; Boogert, Adwin; Arendt, Richard; Cotera, Angela; Robitaille, Thomas; Schultheis, Mathias; Smith, Howard A.; Stolovy, Susan
Issue Date: 2009
Abstract: We report the detection of several molecular gas-phase and ice absorption features in three photometrically-selected young stellar object (YSOs) candidates in the central 280~pc of the Milky Way. Our spectra, obtained with the Infrared Spectrograph (IRS) onboard the {\it Spitzer Space Telescope}, reveal gas-phase absorption from CO$_2$ (15.0 $\mu$m), C$_2$H$_2$ (13.7 $\mu$m) and HCN (14.0 $\mu$m). We attribute this absorption to warm, dense gas in the massive YSOs. We also detect strong and broad 15.2 $\mu$m CO$_2$ ice absorption features, with an absorption profile indicating the presence of thermally processed CO$_2$ ice. Our IRS observations demonstrate the youth of these objects, and provide the first spectroscopic identification of massive YSOs in the Galactic Center.
URI: http://hdl.handle.net/1811/38040
Other Identifiers: 2009-WI-02
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