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dc.contributor.authorRusso, N.D.
dc.contributor.authorVervack, R.J., Jr.
dc.contributor.authorKawakita, H.
dc.contributor.authorBonev, B.P.
dc.contributor.authorDiSanti, M.A.
dc.contributor.authorGibb, E.L.
dc.contributor.authorMcKay, A.J.
dc.contributor.authorCochran, A.L.
dc.contributor.authorWeaver, H.A.
dc.contributor.authorBiver, N.
dc.contributor.authorCrovisier, J.
dc.contributor.authorBockelée-Morvan, D.
dc.contributor.authorKobayashi, H.
dc.contributor.authorHarris, W.M.
dc.contributor.authorRoth, N.X.
dc.contributor.authorSaki, M.
dc.contributor.authorKhan, Y.
dc.date.accessioned2022-03-17T01:57:21Z
dc.date.available2022-03-17T01:57:21Z
dc.date.issued2022
dc.identifier.citationRusso, N. D., Vervack, R. J., Jr., Kawakita, H., Bonev, B. P., DiSanti, M. A., Gibb, E. L., McKay, A. J., Cochran, A. L., Weaver, H. A., Biver, N., Crovisier, J., Bockelée-Morvan, D., Kobayashi, H., Harris, W. M., Roth, N. X., Saki, M., & Khan, Y. (2022). Volatile Abundances, Extended Coma Sources, and Nucleus Ice Associations in Comet C/2014 Q2 (Lovejoy). Planetary Science Journal.
dc.identifier.issn2632-3338
dc.identifier.doi10.3847/PSJ/ac323c
dc.identifier.urihttp://hdl.handle.net/10150/663619
dc.description.abstractHigh-resolution infrared spectra of comet C/2014 Q2 Lovejoy were acquired with NIRSPEC at the W. M. Keck Observatory on two post-perihelion dates (UT 2015 February 2 and 3). H2O was measured simultaneously with CO, CH3OH, H2CO, CH4, C2H6, C2H4, C2H2, HCN, and NH3 on both dates, and rotational temperatures, production rates, relative abundances, H2O ortho-to-para ratios, and spatial distributions in the coma were determined. The first detection of C2H4 in a comet from ground-based observations is reported. Abundances relative to H2O for all species were found to be in the typical range compared with values for other comets in the overall population to date. There is evidence of variability in rotational temperatures and production rates on timescales that are small compared with the rotational period of the comet. Spatial distributions of volatiles in the coma suggest complex outgassing behavior. CH3OH, HCN, C2H6, and CH4 spatial distributions in the coma are consistent with direct release from associated ices in the nucleus and are peaked in a more sunward direction compared with co-measured dust. H2O spatial profiles are clearly distinct from these other four species, likely due to a sizable coma contribution from icy grain sublimation. Spatial distributions for C2H2, H2CO, and NH3 suggest substantial contributions from extended coma sources, providing further evidence for distinct origins and associations for these species in comets. CO shows a different spatial distribution compared with other volatiles, consistent with jet activity from discrete nucleus ice sources. © 2022. The Author(s). Published by the American Astronomical Society.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.rightsCopyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleVolatile Abundances, Extended Coma Sources, and Nucleus Ice Associations in Comet C/2014 Q2 (Lovejoy)
dc.typeArticle
dc.typetext
dc.contributor.departmentLunar and Planetary Laboratory, University of Arizona
dc.identifier.journalPlanetary Science Journal
dc.description.noteOpen access journal
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitlePlanetary Science Journal
refterms.dateFOA2022-03-17T01:57:21Z


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Copyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
Except where otherwise noted, this item's license is described as Copyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.