A study of the distant activity of comet C/2006 W3 (Christensen) with Herschel and ground-based radio telescopes

被引：39

作者：

Bockelee-Morvan, D. ^{[1
]}

Hartogh, P. ^{[2
]}

Crovisier, J. ^{[1
]}

Vandenbussche, B. ^{[3
]}

Swinyard, B. M. ^{[4
]}

Biver, N. ^{[1
]}

Lis, D. C. ^{[5
]}

Jarchow, C. ^{[2
]}

Moreno, R. ^{[1
]}

Hutsemekers, D. ^{[6
]}

Jehin, E. ^{[6
]}

Kueppers, M. ^{[11
]}

Lara, L. M. ^{[12
]}

Lellouch, E. ^{[1
]}

Manfroid, J. ^{[6
]}

de Val-Borro, M. ^{[2
]}

Szutowicz, S. ^{[7
]}

Banaszkiewicz, M. ^{[7
]}

Bensch, F. ^{[8
]}

Blecka, M. I. ^{[7
]}

Emprechtinger, M. ^{[5
]}

Encrenaz, T. ^{[1
]}

Fulton, T. ^{[9
]}

Kidger, M. ^{[10
]}

Rengel, M. ^{[2
]}

Waelkens, C. ^{[3
]}

Bergin, E. ^{[13
]}

Blake, G. A. ^{[5
]}

Blommaert, J. A. D. L. ^{[3
]}

Cernicharo, J. ^{[20
]}

Decin, L. ^{[3
]}

Encrenaz, P. ^{[21
,22
]}

de Graauw, T. ^{[14
,18
,19
]}

Leeks, S. ^{[4
]}

Medvedev, A. S. ^{[2
]}

Naylor, D. ^{[15
]}

Schieder, R. ^{[16
]}

Thomas, N. ^{[17
]}

机构：

[1] Observ Paris, LESIA, F-92195 Meudon, France

[2] Max Planck Inst Sonnensyst Forsch, Katlenburg Lindau, Germany

[3] Katholieke Univ Leuven, Inst Sterrenkunde, Louvain, Belgium

[4] Rutherford Appleton Lab, Didcot, Oxon, England

[5] CALTECH, Pasadena, CA 91125 USA

[6] Inst Astrophys & Geophys, FRS FNRS, Liege, Belgium

[7] Polish Acad Sci, Space Res Ctr, PL-01237 Warsaw, Poland

[8] Deutsch Zentrum Luft & Raumfahrt DLR, Bonn, Germany

[9] Blue Sky Spect Inc, Lethbridge, AB, Canada

[10] ESAC, Herschel Sci Ctr, Madrid, Spain

[11] European Space Astron Ctr, Madrid, Spain

[12] CSIC, Inst Astrofis Andalucia, Granada, Spain

[13] Univ Michigan, Ann Arbor, MI 48109 USA

[14] Joint ALMA Observ, Santiago, Chile

[15] Univ Lethbridge, Lethbridge, AB T1K 3M4, Canada

[16] Univ Cologne, D-5000 Cologne 41, Germany

[17] Univ Bern, CH-3012 Bern, Switzerland

[18] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[19] Univ Groningen, SRON Netherlands Inst Space Res, Groningen, Netherlands

[20] CAB INTA CSIC, Madrid 28850, Spain

[21] Univ Paris 06, Paris, France

[22] Observ Paris, LERMA, F-75014 Paris, France

来源：

ASTRONOMY & ASTROPHYSICS | 2010年 / 518卷

关键词：

comets: individual: C/2006 W3 (Christensen); techniques: photometric; radio lines: planetary systems; radio continuum: planetary systems; comets: general; HALE-BOPP; HYAKUTAKE; CONTINUUM; WATER;

D O I：

10.1051/0004-6361/201014655

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Comet C/2006 W3 (Christensen) was observed in November 2009 at 3.3 AU from the Sun with Herschel. The PACS instrument acquired images of the dust coma in 70-mu m and 160-mu m filters and spectra covering several H2O rotational lines. Spectra in the range 450-1550 GHz were acquired with SPIRE. The comet emission continuum from 70 to 672 mu m was measured, but no lines were detected. The spectral energy distribution indicates thermal emission from large particles and provides a measure of the size distribution index and dust production rate. The upper limit to the water production rate is compared to the production rates of other species (CO, CH3OH, HCN, H2S, OH) measured with the IRAM 30-m and Nancay telescopes. The coma is found to be strongly enriched in species more volatile than water, in comparison to comets observed closer to the Sun. The CO to H2O production rate ratio exceeds 220%. The dust-to-gas production rate ratio is on the order of 1.

引用

页数：6

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