| タイトル | Bima Array Detections of HCN in Comets Linear (C/2002 T7) and Neat (C/2001 Q4) |
| 本文（外部サイト） | http://hdl.handle.net/2060/20040182390 |
| 著者（英） | Remijan, A.; Snyder, L. E.; dePater, Imke; Blake, Geoffrey A.; Dickel, H. R.; Hogerheijde, M. R.; Forster, J. R.; Friedel, D. N.; AHearn, M. F. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2004-01-01 |
| 言語 | eng |
| 内容記述 | 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. |
| NASA分類 | Astronomy |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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