Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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WATER VAPOR MASERS: A SIGNPOST FOR LOW MASS STAR FORMATION

  • Migenes, V. (University of Gunajuato, Department of Astronomy) ;
  • Trinidad, M.A. (University of Gunajuato, Department of Astronomy) ;
  • Valdettaro, R. (INAF - Osservatorio Astrofisico di Arcetri, Largo E.) ;
  • Brand, J. (INAF - Istituto di Radioastronomia) ;
  • Palla, F. (INAF - Osservatorio Astrofisico di Arcetri, Largo E.)
  • Published : 2007.12.31
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Abstract

It is well known that water vapor maser emission at 22.2 GHz is associated with the earliest stages of both low- and high-mass star formation and it can be considered a reliable diagnostic of their evolutionary state. Bright Rimmed Clouds (BRCs) are clouds that have been compressed by an external ionization-shock front which focuses the neutral gas into compact globules. The boundary layer between the neutral gas and the gas ionized by the incident photons is often called "bright rim" but the clumps are sometimes classified also as speck globules or cometary globules depending on their appearance. Small globules with bright rims have been considered to be potential sites of star formation and have been studied in several individual regions. We present results from high resolution VLA observations searching for new candidates of recent star formation in bright-rimmed clouds/globules associated with IRAS point sources.

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References

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