| タイトル | New Molecular Species In Comet C/1995 (Hale-Bopp) Observed with the Caltech Submillimeter Observatory |
| 本文（外部サイト） | http://hdl.handle.net/2060/19980055133 |
| 著者（英） | Despois, D.; Lis, D. C.; Gardner, M.; Crovisier, J.; Phillips, T. G.; Rauer, H.; Biver, N.; Benford, D.; Bockelee-Morvan, D.; Colom, P.; Mehringer, D. M. |
| 著者所属（英） | California Inst. of Tech. |
| 発行日 | 1998-04-01 |
| 言語 | eng |
| 内容記述 | We present millimeter-wave observations of HNCO, HC3N, SO, NH2CHO, H(13)CN, and H3O(+) in comet C/1995 O1 (Hale-Bopp) obtained in February-April, 1997 with the Caltech Submillimeter Observatory (CSO). HNCO, first detected at the CSO in comet C/1996 B2 (Hyakutake), is securely confirmed in comet Hale-Bopp via observations of three rotational transitions. The derived abundance with respect to H2O is (4-13) x 10(exp -4). HC3N, SO, and NH2CHO are detected for the first time in a comet. The fractional abundance of HC3N based on observations of three rotational lines is (1.9 +/- 0.2) x 10(exp -4). Four transitions of SO are detected and the derived fractional abundance, (2-8) x 10(exp -3), is higher than the upper limits derived from UV observations of previous comets. Observations of NH2CHO imply a fractional abundance of (1-8) x 10(exp -4). H3O(+) is detected for the first time from the ground. The H(13)CN (3-2) transition is also detected and the derived HCN/H(13)CN abundance ratio is 90 +/- 15, consistent with the terrestrial C-13/C-12 ratio. in addition, a number of other molecular species are detected, including HNC, OCS, HCO(+), CO(+), and CN (the last two are first detections in a comet at radio wavelengths). |
| NASA分類 | Astrophysics |
| レポートNO | NASA/CR-1998-207519
NAS 1.26:207519
Rept-1998-4 |
| 権利 | No Copyright |
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