Spectroscopic Confirmation of a Population of Isolated, Intermediate-mass Young Stellar Objects
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Author
Kuhn, Michael A.
Saber, Ramzi
Povich, Matthew S.
de Souza, Rafael S.
Krone-Martins, Alberto
Ishida, Emille E.~O.
Zucker, Catherine
Benjamin, Robert A.
Hillenbrand, Lynne A.
Castro-Ginard, Alfred
Zhou, Xingyu
Collaboration, COIN
Attention
2299/26603
Abstract
Wide-field searches for young stellar objects (YSOs) can place useful constraints on the prevalence of clustered versus distributed star formation. The Spitzer/IRAC Candidate YSO (SPICY) catalog is one of the largest compilations of such objects (∼120,000 candidates in the Galactic midplane). Many SPICY candidates are spatially clustered, but, perhaps surprisingly, approximately half the candidates appear spatially distributed. To better characterize this unexpected population and confirm its nature, we obtained Palomar/DBSP spectroscopy for 26 of the optically bright (G < 15 mag) “isolated” YSO candidates. We confirm the YSO classifications of all 26 sources based on their positions on the Hertzsprung-Russell diagram, H and Ca ii line emission from over half the sample, and robust detection of infrared excesses. This implies a contamination rate of
Publication date
2023-01-31Published in
The Astronomical JournalPublished version
https://doi.org/10.3847/1538-3881/ac9314Other links
http://hdl.handle.net/2299/26603Metadata
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