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Communication Dans Un Congrès Année : 2010

Spectroscopic Study of Massive Young Stellar Object Candidates in the Galactic Center

Résumé

We present results of a spectroscopic study of massive young stellar object (YSO) candidates in the central 200 pc region of the Milky Way Galaxy, using the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope. Our 107 massive YSO candidates were selected based on colors of point sources in high sensitivity Spitzer/IRAC images. Following our recent announcement of the first spectroscopic identification of massive YSOs in the Galactic Center, we show that about one third of our targets reveal spectral features characteristic of massive YSOs, such as molecular gas-phase absorptions from C2H2 (13.7 μm), HCN (14.0 μm), and CO2 (15.0 μm), and solid-phase absorptions from 15 μm CO2 ice with a broad absorption profile, suggestive of CO2 ice mixed with CH3OH ice. These IRS spectra of the YSO candidates will allow us to study the early stages of star formation in the Galactic Center.
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Dates et versions

hal-00473138 , version 1 (14-04-2010)

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D. An, S. V. Ramírez, K. Sellgren, R. G. Arendt, A. C. A. Boogert, et al.. Spectroscopic Study of Massive Young Stellar Object Candidates in the Galactic Center. Spectroscopic Study of Massive Young Stellar Object Candidates in the Galactic Center, Jan 2010, Washington, United States. pp.451,+. ⟨hal-00473138⟩
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