Publication:
HCN PRODUCTION FROM COMET HALLEY

dc.contributor.authorSchloerb, FP
dc.contributor.authorKINZEL, WM
dc.contributor.authorSWADE, DA
dc.contributor.authorIrvine, William M.
dc.contributor.departmentUniversity of Massachusetts - Amherst
dc.date2023-09-22T23:50:26.000
dc.date.accessioned2024-04-26T08:28:42Z
dc.date.available2024-04-26T08:28:42Z
dc.date.issued1986
dc.description<p>The published version is located at <a href="http://adsabs.harvard.edu/doi/10.1086/184781">http://adsabs.harvard.edu/doi/10.1086/184781</a></p>
dc.description.abstractThe HCN J = 1-0 rotational transition at 3.4 mm wavelength has been detected and has been monitored in comet P/Halley during a total of 56 individual observing sessions between November 18, 1985 and May 11, 1986. The HCN spectra show significant daily variations in total intensity, but the average HCN production rate is well correlated with the visual magnitude of the comet over the range of heliocentric distance observed (between 0.59 and 1.8). Observations of the ratios of the F = 2-1 and F = 1-1 hyperfine components also exhibit significant daily variations but are, in the mean, consistent with the 5:3 ratio expected from the statistical weights of the hyperfine levels. The outflow velocity of the coma, deduced from the HCN linewidths, is 0.87 + or - 0.12 km/s, which is consistent with recent theoretical estimates as well as the measurements of the Giotto spacecraft.
dc.description.pagesL55-L60
dc.identifier.doihttps://doi.org/10.1086/184781
dc.identifier.urihttps://hdl.handle.net/20.500.14394/3181
dc.relation.ispartofASTROPHYSICAL JOURNAL
dc.source.issue1
dc.source.issue310
dc.source.statuspublished
dc.subjectAstrophysics and Astronomy
dc.titleHCN PRODUCTION FROM COMET HALLEY
dc.typearticle
dc.typearticle
digcom.contributor.authorSchloerb, FP
digcom.contributor.authorKINZEL, WM
digcom.contributor.authorSWADE, DA
digcom.contributor.authorisAuthorOfPublication|email:irvine@astro.umass.edu|institution:University of Massachusetts - Amherst|Irvine, William M.
digcom.identifierastro_faculty_pubs/518
digcom.identifier.contextkey1683210
digcom.identifier.submissionpathastro_faculty_pubs/518
dspace.entity.typePublication
relation.isAuthorOfPublicationc3df84b6-eb22-47c9-9051-3c95c60ac458
relation.isAuthorOfPublication.latestForDiscoveryc3df84b6-eb22-47c9-9051-3c95c60ac458
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