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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1045| The balloon-borne large aperture submillimeter telescope (BLAST) 2005: a 4 deg² galactic plane survey in vulpecula (ℓ= 59°) | |
| David Hughes | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| We present the first results from a new 250, 350, and 500μm Galactic Plane survey taken with the Balloon-borne Large-Aperture Submillimeter Telescope (BLAST) in 2005. This survey’s primary goal is to identify and characterize high-mass proto-stellar objects (HMPOs). The región studied here covers 4 deg² near the open cluster NGC 6823 in the constellation Vulpecula (ℓ =59°). We find 60 compact sources (<60′′diameter) detected simultaneously in all three bands. Their spectral energy distributions (SEDs) are constrained through BLAST, IRAS, Spitzer MIPS, andMSX photometry, with inferred dust temperatures spanning ~12–40K assuming a dust emissivity index β = 1.5. The luminosity-to-mass ratio, a distance-independent quantity, spans ~ 0.2–130LꙩMꙩ¯¹. Distances are estimated from coincident ¹³CO(1 → 0) velocities combined with a variety of other velocity and morphological data in the literature. In total, 49 sources are associated with a molecular cloud complex encompassing NGC 6823 (distance ~2.3 kpc), 10 objects with the Perseus Arm (~8.5 kpc) and one object is probably in the outer Galaxy (~14 kpc). Near NGC 6823, the inferred luminosities and masses of BLAST sources span ~40–10⁴Lꙩ, and ~15–700Mꙩ, respectively. The mass spectrum is compatible with molecular gas masses in other high-mass star forming regions. Several luminous sources appear to be Ultra Compact H II regions powered by early B stars. However, many of the objects are cool, massive gravitationally-bound clumps with no obvious internal radiation from a protostar, and hence excellent HMPO candidates. | |
| The astrophysical journal | |
| 2008 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Chapin, E. L., et al., (2008). The balloon-borne large aperture submillimeter telescope (BLAST) 2005: a 4 deg² galactic plane survey in vulpecula (ℓ= 59°), The astrophysical journal, Vol.681:428-452 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
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| Fichero | Tamaño | Formato | |
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| 20_The Balloon-borne Large-A 4 sq. deg Galactic Plane.pdf | 1.44 MB | Adobe PDF | Visualizar/Abrir |