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  • 1
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    IRAS sources near the positions of pulsars (1993)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: We searched the IRAS database at the positions of pulsars to see if they are associated with FIR sources, as might be expected if some pulsars possess preplanetary disks. There are 13 IRAS sources from the Point Source Catalog within 1 arcmin of nearly 500 radio pulsars. While this does not represent an enhancement over the number of chance coincidences, we argue that several are in fact associated with pulsars.
    Keywords: ASTRONOMY
    Type: In: Planets around pulsars; Proceedings of the Conference, California Inst. of Technology, Pasadena, Apr. 30-May 1, 1992 (A93-36426 14-90); p. 327-333.
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    IRAS results on outer galaxy star formation (1989)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    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.
    Keywords: ASTRONOMY
    Type: NASA, Ames Research Center, Interstellar Dust: Contributed Papers; p 235
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A correlation between the IRAS infrared cirrus at 60 or 100 microns and neutral atomic hydrogen in the outer galaxy (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: A linear correlation was found between the infrared cirrus at 100 or 60 microns and neutral atomic hydrogen near the galactic plane. Infrared Astronomy Satellite (IRAS) Sky Brightness images were compared to the 0.5 deg resolution Weaver-Williams HI survey in two regions of the outer Galaxy near l = 125 deg and l = 215 deg. The dust temperature inferred is nearly uniform and in reasonable agreement with theoretical predictions of thermal dust emission.
    Keywords: ASTRONOMY
    Type: NASA, Washington Star Formation in Galaxies; p 103-105
    Format: application/pdf
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  • 4
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    IRAS colors of VLA identified objects in the galaxy (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Infrared Astronomy Satellite (IRAS) sources found within 4 degrees of l = 125 deg, b = 2 deg on the 3rd HCON 60 micron Sky Brightness Images were observed at the Very Large Array (VLA). Regions were to be identified where massive stars are forming by looking for small areas of radio continuum emissions. The IRAS sources could be divided into three groups by their IRAS 12 micron/25 micron and 60 micron/100 micron color. The group identified with star forming regions contained essentially all of the objects with extended radio emission. In all of these cases the extended radio emission showed a morphology consistent with the identification of these objects as HII regions. The conclusion drawn is that star formation regions can be distinguished from other objects by their infrared colors.
    Keywords: ASTRONOMY
    Type: NASA, Washington Star Formation in Galaxies; p 63-66
    Format: application/pdf
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