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A Herschel Study of D/H in Water in the Jupiter-Family Comet 45P/Honda-Mrkos-Pajdušáková and Prospects for D/H Measurements with CCAT

Lis, D. C. and Biver, N. and Bockelée-Morvan, D. and Hartogh, P. and Bergin, E. A. and Blake, G. A. and Crovisier, J. and de Val-Borro, M. and Jehin, E. and Küppers, M. and Manfroid, J. and Moreno, R. and Rengel, M. and Szutowicz, S. (2013) A Herschel Study of D/H in Water in the Jupiter-Family Comet 45P/Honda-Mrkos-Pajdušáková and Prospects for D/H Measurements with CCAT. Astrophysical Journal Letters, 774 (1). Art. No. L3. ISSN 2041-8205. doi:10.1088/2041-8205/774/1/L3.

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We present Herschel observations of water isotopologues in the atmosphere of the Jupiter-family comet 45P/Honda–Mrkos–Pajdušáková. No HDO emission is detected, with a 3σ upper limit of 2.0 × 10^(−4) for the D/H ratio. This value is consistent with the earlier Herschel measurement in the Jupiter-family comet 103P/Hartley 2. The canonical value of 3 × 10^(−4) measured pre-Herschel in a sample of Oort-cloud comets can be excluded at a 4.5σ level. The observations presented here further confirm that a diversity of D/H ratios exists in the comet population and emphasize the need for additional measurements with future ground-based facilities, such as CCAT, in the post-Herschel era.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Lis, D. C.0000-0002-0500-4700
Bergin, E. A.0000-0003-4179-6394
Blake, G. A.0000-0003-0787-1610
Additional Information:© 2013 The American Astronomical Society. Received 2013 June 19; accepted 2013 July 17; published 2013 August 12. HIFI has been designed and built by a consortium of institutes and university departments from across Europe, Canada, and the United States (NASA) under the leadership of SRON, Netherlands Institute for Space Research, Groningen, The Netherlands, and with major contributions from Germany, France, and the US. Support for this work was provided by NASA through an award issued by JPL/Caltech. M.dV.B. acknowledges support from NSF (AST-1108686) and NASA (NNX12AH91H) and S.S. from Polish MNiSW (181/N-HSO/2008/0).We thank J. Giorgini for preparing the ephemeris used in the observations and numerous amateur astronomers who provided astrometric measurements on short notice.
Group:UNSPECIFIED, UNSPECIFIED, Division of Geological and Planetary Sciences
Funding AgencyGrant Number
Ministerstwo Nauki i Szkolnictwa Wyższego (MNiSW)181/N-HSO/2008/0
Subject Keywords:comets: general – comets: individual (45P/Honda–Mrkos–Pajdušáková) – molecular processes – submillimeter: planetary systems
Issue or Number:1
Record Number:CaltechAUTHORS:20130812-095347891
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Official Citation:D. C. Lis et al 2013 ApJL 774 L3
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39867
Deposited By: Ruth Sustaita
Deposited On:12 Aug 2013 17:39
Last Modified:09 Nov 2021 23:47

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