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28 March 2024
 
  » arxiv » astro-ph/0107145

 Article overview


A Search for Supernova-Remnant Masers Toward Unidentified EGRET Sources
Z. Arzoumanian ; F. Yusef-Zadeh ; T. J. W. Lazio ;
Date 8 Jul 2001
Subject astro-ph
AffiliationNASA-GSFC), F. Yusef-Zadeh (NWU), T. J. W. Lazio (NRL
AbstractSupernova remnants expanding into adjacent molecular clouds are believed to be sites of cosmic ray acceleration and sources of energetic gamma-rays. Under certain environmental conditions, such interactions also give rise to unusual OH masers in which the 1720 MHz satellite line dominates over the more common 1665/7 MHz emission. Motivated by the apparent coincidence of a handful of EGRET sources with OH(1720 MHz) maser-producing supernova remnants, we have carried out a search using the Very Large Array for new OH(1720 MHz) masers within the error regions of 11 unidentified EGRET sources at low Galactic latitude. While a previously known maser associated with an HII region was serendipitously detected, initial results indicate that no new masers were found down to a limiting flux of, typically, 50 mJy. We discuss the implications of this result on the nature of the unidentified Galactic EGRET sources.
Source arXiv, astro-ph/0107145
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