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Bima Array Detections of HCN in Comets Linear (C/2002 T7) and Neat (C/2001 Q4).

Author
Remijan, A.
Published
January 2004.
Physical Description
1 electronic document
Additional Creators
Snyder, L. E., dePater, Imke, Blake, Geoffrey A., Dickel, H. R., Hogerheijde, M. R., Forster, J. R., Friedel, D. N., and AHearn, M. F.
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Summary
We present interferometric detections of HCN in comets LINEAR (C/2002 T7) and NEAT (C/2001 Q4) with the Berkeley-Illinois-Maryland Association (BIMA) Array in its D-configuration cross-correlation mode. We detected the HCN J = 1 - 0 emission line in both comets. With a 25".4 x 20".3 synthesized beam around Comet LINEAR, we found a total beam averaged HCN column density (assuming a rotation temperature of 146 K) of < N(sub T) > = 2.1(11)x 10(sup 13) cm(exp -2), and a HCN production rate of Q(HCN)=2.8(15)x 10(sup 27) s(exp -1). With a 21".3 x 17".5 synthesized beam around Comet NEAT, we found a total beam averaged HCN column density (assuming a rotation temperature of 107 K) of < N(sub T) > = 5.7(30) x 10(sup l2) cm(exp -2), and a HCN production rate of Q(HCN)=8.3(44) x 10(sup 26) s(exp -l) giving a production rate of HCN relative to H2O of approximately 0.09(5)%. The production rates relative to H2O and spatial extent of HCN are similar to previous comet observations.
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Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20040182390.
Terms of Use and Reproduction
Copyright, Distribution as joint owner in the copyright.
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