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J/A+A/327/755       OH maser emission from IRAS sources (Palla+ 1997)
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Search for H_2_O maser emission from high-latitude IRAS sources
       Palla F., Codella C., Valdettaro R., Baffa C.
      <Astron. Astrophys. 327, 755 (1997)>
      =1997A&A...327..755P      (SIMBAD/NED BibCode)
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ADC_Keywords: Infrared sources ; Masers ; Radio lines
Keywords: masers - stars: formation - ISM: clouds - galaxies: starburst

Abstract:
    A high-sensitivity search for water maser emission at 22.2 GHz has
    been performed on a sample of 91 IRAS point sources at high-latitudes.
    The aim of the survey is to verify if these clouds are capable of star
    formation as indicated by the presence of water masers. The sample is
    based on the recent work of Magnani et al. (1995ApJS...96..159M) who
    have identified 192 infrared objects from the IRAS Faint Source Survey
    possibly associated with translucent clouds at galactic latitudes
    |b|>=30{deg}. These IRAS sources have far-infrared colours typical of
    young stellar objects and pre-main-sequence stars and thus provide a
    starting list for further studies about their actual nature. H_2_O
    maser emission is a good diagnostic of the presence of dense gas and
    of recent star formation. We did not find water maser emission at a
    level of 0.2-0.5Jy (3{sigma}) in any of the 91 objects. The negative
    result indicates that these high-latitude sources do not represent
    potential sites of star formation, consistent with the fact that most
    high-latitude molecular clouds do not appear gravitationally bound.

File Summary:
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  FileName Lrecl     Records   Explanations
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ReadMe        80           .   This file
table1        73          56   Sources with IRAS emission at all four bands
                                (Sample A)
table2        57          35   Sources with IRAS emission in the 12, 25, 60{mu}m
                                (Sample B)
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See also:
    J/A+A/277/453 : OH maser survey of cool IRAS sources (David+ 1993)

Byte-by-byte Description of file: table1 table2
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   Bytes Format Units   Label     Explanations
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   1-  7  A7    ---     Name      Source Name
  10- 20  A11   ---     IRAS      IRAS Source Name
  24- 25  I2    h       RAh       Right Ascension (1950)
  27- 28  I2    min     RAm       Right Ascension (1950)
  30- 33  F4.1  s       RAs       Right Ascension (1950)
      37  A1    ---     DE-       Declination sign
  38- 39  I2    deg     DEd       Declination (1950)
  41- 42  I2    arcmin  DEm       Declination (1950)
  44- 45  I2    arcsec  DEs       Declination (1950)
  49- 52  F4.2  Jy      rms       Noise of the spectrum
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Acknowledgements: Claudio Codella <codella@oan.es>
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(End)                                         Patricia Bauer [CDS]   09-Jul-1997