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Detection of OH Absorption Against PSR B1849+00


Stanimirovic, S and Weisberg, JM and Dickey, JM and de la Fuente, A and Devine, K and Hedden, A and Anderson, SB, Detection of OH Absorption Against PSR B1849+00, The Astrophysical Journal, 592, (2) pp. 953-963. ISSN 0004-637X (2003) [Refereed Article]

DOI: doi:10.1086/375779


We have searched for OH absorption against seven pulsars using the Arecibo telescope. In both OH main lines (at 1665 and 1667 MHz), deep and narrow absorption features were detected toward PSR B1849+00. In addition, we have detected several absorption and emission features against B33.6+0.1, a nearby supernova remnant (SNR). The most interesting result of this study is that a pencil-sharp absorption sample against the PSR differs greatly from the large-angle absorption sample observed against the SNR. If both the PSR and the SNR probe the same molecular cloud, then this finding has important implications for absorption studies of the molecular medium, since it shows that the statistics of absorbing OH depends on the size of the background source. We also show that the OH absorption against the PSR most likely originates from a small (<30″) and dense (>105 cm -3) molecular clump.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Dickey, JM (Professor John Dickey)
ID Code:35939
Year Published:2003
Web of Science® Times Cited:18
Deposited By:Physics
Deposited On:2005-09-20
Last Modified:2011-11-29

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