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Sökning: onr:"swepub:oai:research.chalmers.se:85d07e3b-3a1f-4aad-a38c-ae3efeff89b0" > Radio observations ...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00005568naa a2200541 4500
001oai:research.chalmers.se:85d07e3b-3a1f-4aad-a38c-ae3efeff89b0
003SwePub
008171008s2007 | |||||||||||000 ||eng|
009oai:DiVA.org:su-11730
0247 a https://research.chalmers.se/publication/422412 URI
0247 a https://doi.org/10.1016/j.icarus.2006.10.0112 DOI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-117302 URI
040 a (SwePub)cthd (SwePub)su
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Biver, N.u Observatoire de Paris-Meudon4 aut
2451 0a Radio observations of Comet 9P/Tempel 1 before and after Deep Impact
264 1b Elsevier BV,c 2007
500 a and 14 other authors
520 a Comet 9P/Tempel 1 was the target of a multi-wavelength worldwide investigation in 2005. The NASA Deep Impact mission reached the comet on 4.24 July 2005, delivering a 370-kg impactor which hit the comet at 10.3 km s -1 . Following this impact, a cloud of gas and dust was excavated from the comet nucleus. The comet was observed in 2005 prior to and after the impact, at 18-cm wavelength with the Nançay radio telescope, in the millimeter range with the IRAM and CSO radio telescopes, and at 557 GHz with the Odin satellite. OH observations at Nançay provided a 4-month monitoring of the outgassing of the comet from March to June, followed by the observation of H 2 O with Odin from June to August 2005. The peak of outgassing was found to be around 1 × 10 28   molec. s -1 between May and July. Observations conducted with the IRAM 30-m radio telescope in May and July 2005 resulted in detections of HCN, CH 3 OH and H 2 S with classical abundances relative to water (0.12, 2.7 and 0.5%, respectively). In addition, a variation of the HCN production rate with a period of 1.73 ± 0.10 days was observed in May 2005, consistent with the 1.7-day rotation period of the nucleus. The phase of these variations, as well as those of CN seen in July by Jehin et al. [Jehin, E., Manfroid, J., Hutsemékers, D., Cochran, A.L., Arpigny, C., Jackson, W.M., Rauer, H., Schulz, R., Zucconi, J.-M., 2006. Astrophys. J. 641, L145-L148], is consistent with a rotation period of the nucleus of 1.715 days and a strong variation of the outgassing activity by a factor 3 from minimum to maximum. This also implies that the impact took place on the rising phase of the "natural" outgassing which reached its maximum ≈4 h after the impact. Post-impact observations at IRAM and CSO did not reveal a significant change of the outgassing rates and relative abundances, with the exception of CH 3 OH which may have been more abundant by up to one order of magnitude in the ejecta. Most other variations are linked to the intrinsic variability of the comet. The Odin satellite monitored nearly continuously the H 2 O line at 557 GHz during the 38 h following the impact on the 4th of July, in addition to weekly monitoring. Once the periodic variations related to the nucleus rotation are removed, a small increase of outgassing related to the impact is present, which corresponds to the release of ≈ 5000 ± 2000 tons of water. Two other bursts of activity, also observed at other wavelengths, were seen on 23 June and 7 July; they correspond to even larger releases of gas. © 2006 Elsevier Inc. All rights reserved.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
7001 a Bockelée-Morvan, D.u Observatoire de Paris-Meudon4 aut
7001 a Boissier, J.u Observatoire de Paris-Meudon4 aut
7001 a Crovisier, J.u Observatoire de Paris-Meudon4 aut
7001 a Colom, P.u Observatoire de Paris-Meudon4 aut
7001 a Lecacheux, A.u Observatoire de Paris-Meudon4 aut
7001 a Moreno, R.u Observatoire de Paris-Meudon4 aut
7001 a Paubert, G.u Institut de Radioastronomie Millimétrique (IRAM)4 aut
7001 a Lis, D.u California Institute of Technology (Caltech)4 aut
7001 a Sumner, M.u California Institute of Technology (Caltech)4 aut
7001 a Frisk, U.u Swedish Space Corporation (SSC)4 aut
7001 a Hjalmarson, Åke,d 1939u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)akehjalm
7001 a Olberg, Michael,d 1956u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)olberg
7001 a Winnberg, Anders,d 1937u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)andwin
7001 a Florén, Hans-Gustavu Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)flore
7001 a Sandqvist, Aa.4 aut
7001 a Kwok, S.u University of Calgary,Academia Sinica Taiwan4 aut
7001 a Sandqvist, Aageu Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)aage
7102 a Observatoire de Paris-Meudonb Institut de Radioastronomie Millimétrique (IRAM)4 org
7730 t Icarusd : Elsevier BVg 187:1, s. 253-271q 187:1<253-271x 1090-2643x 0019-1035
8564 u http://dx.doi.org/10.1016/j.icarus.2006.10.011y FULLTEXT
8564 u http://arxiv.org/pdf/astro-ph/0610717
8564 8u https://research.chalmers.se/publication/42241
8564 8u https://doi.org/10.1016/j.icarus.2006.10.011
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-11730

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