A search for 22-GHz H2O masers in supernova remnants

Details A search for 22-GHz H2O masers in supernova remnants A search for 22-GHz H2O masers in supernova remnants

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.378l..20w&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 378, Issue 1, pp. L20-L23.

Astronomy and Astrophysics

Astronomy

2

Mhd, Masers, Radiative Transfer, Shock Waves, Supernova Remnants, Radio Lines: Ism

Scientific paper

We have examined 18 known supernova remnants for evidence of the 22.235-GHz water maser spectral line, using the 20-m telescope at the Onsala observatory in Sweden. No evidence of such emission was discovered above the background noise in any of the observations. We have developed a radiative transfer water maser model for the shocked regions of supernova remnants in order to determine why this emission was not detected. The model indicates an insignificant amount of 22.235-GHz gain; the gain lengths are far too short to allow the formation of detectable water masers from these objects. We predict that only in unusual environments can 22-GHz water masers be detected around supernova remnants.

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