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          Institute: MPI für Radioastronomie     Collection: Publikationen des MPI für Radioastronomie     Display Documents

ID: 11078.0, MPI für Radioastronomie / Publikationen des MPI für Radioastronomie
High-resolution mid-infrared imaging of G339.88-1.26
Authors:De Buizer, J. M.; Walsh, A. J.; Pina, R. K.; Phillips, C. J.; Telesco, C. M.
Date of Publication (YYYY-MM-DD):2002-01-01
Title of Journal:Astrophysical Journal
Journal Abbrev.:Astrophys. J.
Issue / Number:1
Start Page:327
End Page:332
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:G339.88-1.26 is considered to be a good candidate for a massive star with a circumstellar disk. This has been supported by the observations of linearly distributed methanol maser spots believed to delineate this disk and mid-infrared observations that have discovered a source at this location that is elongated at the same position angle as the methanol maser distribution. We used the mid-infrared imager/spectrometer OSCIR at Keck Observatory to make high-resolution images of G339.88-1.26. We resolve the mid-infrared emission into three sources within 1".5 of the location of the masers. We determine that the methanol masers are most likely not located in a circumstellar disk. Furthermore, we find that the observed radio continuum emission most likely comes from two sources in close proximity to each other. One source is an unobscured massive star with an extended H II region that is responsible for the peak in the radio continuum emission. A second source is embedded and centered on the elongation in the radio continuum emission that is believed to be tracing an outflow in this region.
Free Keywords:HII regions; infrared : ISM; ISM : individual (G339.88-1.26); ISM : jets and outflows; masers; stars : formation
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Radioastronomie
External Affiliations:Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla; 603, La Serena, Chile; Natl Opt Astron Observ, Cerro Tololo Interamer Observ, La Serena, Chile; Max Planck Inst Radioastron, D-53121 Bonn, Germany; Univ Florida, Dept Astron, Gainesville, FL 32601 USA; Radiostrerrenwacht Dwingeloo, Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands
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