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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421734.0, MPI für Astronomie / Publikationen_mpia
Mid-infrared photometry and spectra of three high-mass protostellar candidates at IRAS 18151-1208 and IRAS 20343+4129
Authors:Campbell, M. F.; Sridharan, T. K.; Beuther, H.; Lacy, J. H.; Hora, J. L.; Zhu, Q.; Kassis, M.; Saito, M.; De Buizer, J. M.; Fung, S. H.; Johnson, L. C.
Language:English
Date of Publication (YYYY-MM-DD):2008
Title of Journal:The Astrophysical Journal
Volume:673
Start Page:954
End Page:967
Review Status:not specified
Audience:Experts Only
Abstract / Description:We present arcsecond-scale mid-IR photometry (in the 10.5 mum N band and at 24.8 mum), and low-resolution spectra in the N band (R~=100) of a candidate high-mass protostellar object (HMPO) in IRAS 18151-1208 and of two HMPO candidates in IRAS 20343+4129, IRS 1 and IRS 3. In addition, we present high-resolution mid-IR spectra (R~=80,000) of the two HMPO candidates in IRAS 20343+4129. These data are fitted with simple models to estimate the masses of gas and dust associated with the mid-IR-emitting clumps, the column densities of overlying absorbing dust and gas, the luminosities of the HMPO candidates, and the likely spectral type of the HMPO candidate for which [Ne II] 12.8 mum emission was detected (IRAS 20343+4129 IRS 3). We suggest that IRAS 18151-1208 is a pre-ultracompact H II region HMPO, IRAS 20343+4129 IRS 1 is an embedded young stellar object with the luminosity of a B3 star, and IRAS 20343+4129 IRS 3 is a B2 ZAMS star that has formed an ultracompact H II region and disrupted its natal envelope.
Free Keywords:Stars: Circumstellar Matter; ISM: H II Regions; Infrared: ISM; ISM: Jets and Outflows; Stars: Formation; Stars: Pre-Main-Sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008ApJ...673..954C [ID No:1]
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