NDLI: Iras results on outer galaxy star formation

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Iras results on outer galaxy star formation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Terebey, Susan Fich, Michel
Copyright Year	1989
Description	An infrared defined (60 micron) sample of IRAS sources were systematically studied in order to investigate star formation in the outer Galaxy. Five percent of the sample are point sources with IRAS spectra that suggest the emission is from a dust shell surrounding a mature star. Ninety five percent have spectra where flux density strictly rises with wavelength. The sources are extended, and it is shown that Point Source Catalog fluxes seriously underestimate total fluxes. CO kinematic distances were reliably assigned to two thirds of the sources. Most of the infrared luminosities correspond to B spectral types. Six cm continuum emission were detected from all sources inferred to have spectral type B1 or earlier. The combined IRAS/CO/6 cm data show these sources are young, moderately massive stars that are embedded in interstellar clouds. The young embedded sources define a distinct band in an IRAS color-colar diagram. Normal IRAS galaxies fall in the same band, consistent with the interpretation that their infrared emission is due to star formation.
File Size	37667
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19910005640
Archival Resource Key	ark:/13960/t5dc2xt1v
Language	English
Publisher Date	1989-12-01
Access Restriction	Open
Subject Keyword	Astronomy Astronomical Catalogs Galactic Evolution Infrared Astronomy Satellite Stellar Luminosity Shell Stars Point Sources Cosmic Dust Star Formation Flux Density Emission Spectra Continuums Kinematics Infrared Radiation Interstellar Matter Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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