Infrared Continuum and Line Evolution of the Equatorial Ring around SN 1987A

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dc.contributor.authorArendt, Richard
dc.contributor.authorDwek, Eli
dc.contributor.authorBouchet, Patrice
dc.contributor.authorDanziger, I. John
dc.contributor.authorFrank, Kari A.
dc.contributor.authorGehrz, Robert D.
dc.contributor.authorPark, Sangwook
dc.contributor.authorWoodward, Charles E.
dc.date.accessioned2022-06-08T18:02:36Z
dc.date.available2022-06-08T18:02:36Z
dc.date.issued2016-02-18
dc.description.abstractSpitzer observations of SN 1987A have now spanned more than a decade. Since day ∼4000, mid-infrared (mid-IR) emission has been dominated by that from shock-heated dust in the equatorial ring (ER). From 6000 to 8000 days after the explosion, Spitzer observations included broadband photometry at 3.6–24 μm, and low and moderate resolution spectroscopy at 5–35 μm. Here we present later Spitzer observations, through day 10,377, which include only the broadband measurements at 3.6 and 4.5 μm. These data show that the 3.6 and 4.5 μm brightness has clearly begun to fade after day ∼8500, and no longer tracks the X-ray emission as well as it did at earlier epochs. This can be explained by the destruction of the dust in the ER on timescales shorter than the cooling time for the shocked gas. We find that the evolution of the late time IR emission is also similar to the now fading optical emission. We provide the complete record of the IR emission lines, as seen by Spitzer prior to day 8000. The past evolution of the gas as seen by the IR emission lines seems largely consistent with the optical emission, although the IR [Fe ii] and [Si ii] lines show different, peculiar velocity structures.en_US
dc.description.sponsorshipThis work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA. This research has made use of NASA's Astrophysics Data System Bibliographic Services. ED was supported by NASA grants 12-ADAP12-0145 and 13-ADAP13-0094. We thank the referee, A. Jones, for useful comments which improved this manuscript.en_US
dc.description.urihttps://iopscience.iop.org/article/10.3847/0004-6256/151/3/62en_US
dc.format.extent21 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m21zpr-1oyy
dc.identifier.citationRichard G. Arendt et al. Infrared Continuum and Line Evolution of the Equatorial Ring around SN 1987A.  The Astrophysical Journal. 151, 62 (2016). https://doi.org/10.3847/0004-6256/151/3/62.en_US
dc.identifier.urihttps://doi.org/10.3847/0004-6256/151/3/62
dc.identifier.urihttp://hdl.handle.net/11603/24857
dc.language.isoen_USen_US
dc.publisherIOP Scienceen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis is a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleInfrared Continuum and Line Evolution of the Equatorial Ring around SN 1987Aen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-8403-8548en_US

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