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Published September 13, 2013 | Version Submitted + Published
Journal Article Open

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

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon École Normale Supérieure - PSL
  • 3. ROR icon Max Planck Society
  • 4. ROR icon University of Michigan–Ann Arbor
  • 5. ROR icon Princeton University
  • 6. ROR icon University of Liège
  • 7. ROR icon Centrum Badań Kosmicznych

Abstract

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.

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.

Attached Files

Published - Lis_2013_ApJL_774_L3.pdf

Submitted - 1307.6869v1.pdf

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Additional details

Identifiers

Eprint ID
39867
Resolver ID
CaltechAUTHORS:20130812-095347891

Related works

Describes
https://arxiv.org/abs/1307.6869 (URL)

Funding

NASA/JPL/Caltech
NSF
AST-1108686
NASA
NNX12AH91H
Ministerstwo Nauki i Szkolnictwa Wyższego (MNiSW)
181/N-HSO/2008/0

Dates

Created
2013-08-12
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Division of Geological and Planetary Sciences (GPS)