The Morphology Of The Ejecta In Supernova 1987A: A Study Over Time And Wavelength

Simple item page
dc.contributor.utaustinauthorWheeler, J. Craigen_US
dc.creatorLarsson, Josefinen_US
dc.creatorFransson, Claesen_US
dc.creatorKjaer, Karinaen_US
dc.creatorJerkstrand, Andersen_US
dc.creatorKirshner, Robert P.en_US
dc.creatorLeibundgut, Brunoen_US
dc.creatorLundqvist, Peteren_US
dc.creatorMattila, Seppoen_US
dc.creatorMcCray, Richarden_US
dc.creatorSollerman, Jesperen_US
dc.creatorSpyromilio, Jasonen_US
dc.creatorWheeler, J. Craigen_US
dc.date.accessioned2016-04-28T19:35:13Z
dc.date.available2016-04-28T19:35:13Z
dc.date.issued2013-05en
dc.description.abstractWe present a study of the morphology of the ejecta in Supernova 1987A based on images and spectra from the Hubble Space Telescope (HST) as well as integral field spectroscopy from VLT/SINFONI. The HST observations were obtained between 1994 and 2011 and primarily probe the outer H-rich zones of the ejecta. The SINFONI observations were obtained in 2005 and 2011 and instead probe the [Si I]+[Fe II] emission from the inner regions. We find a strong temporal evolution of the morphology in the HST images, from a roughly elliptical shape before similar to 5000 days, to a more irregular, edge-brightened morphology with a "hole" in the middle thereafter. This transition is a natural consequence of the change in the dominant energy source powering the ejecta, from radioactive decay before similar to 5000 days to X-ray input from the circumstellar interaction thereafter. The [Si I]+[Fe II] images display a more uniform morphology, which may be due to a remaining significant contribution from radioactivity in the inner ejecta and the higher abundance of these elements in the core. Both the Ha and the [Si I]+[Fe II] line profiles show that the ejecta are distributed fairly close to the plane of the inner circumstellar ring, which is assumed to define the rotational axis of the progenitor star. The Ha emission extends to higher velocities than [Si I]+[Fe II], as expected from theoretical models. There is no clear symmetry axis for all the emission. Instead, we find that the emission is concentrated to clumps and that the emission is distributed somewhat closer to the ring in the north than in the south. This north-south asymmetry may be partially explained by dust absorption. We compare our results with explosion models and find some qualitative agreement, but note that the observations show a higher degree of large-scale asymmetry.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipSwedish National Space Boarden_US
dc.description.sponsorshipSwedish Research Councilen_US
dc.description.sponsorshipNational Science Foundation NSF PHY11-25915en_US
dc.description.sponsorshipNASA through grants from the Space Telescope Science Institute 02563, 03853, 04445, 05480, 06020, 07434, 08243, 08648, 09114, 09428, 10263, 11181, 11973, 12241en_US
dc.description.sponsorshipNASA NAS5-26555en_US
dc.description.sponsorshipEuropean Organisation for Astronomical Research in the Southern Hemisphere, Chile (ESO Programme) 076.D0558, 086.D-0713(C)en_US
dc.identifierdoi:10.15781/T29Z3N
dc.identifier.Filename2013_05_supernova1987a.pdfen_US
dc.identifier.citationLarsson, Josefin, Claes Fransson, Karina Kjaer, Anders Jerkstrand, Robert P. Kirshner, Bruno Leibundgut, Peter Lundqvist et al. "The morphology of the ejecta in Supernova 1987A: a study over time and wavelength." The Astrophysical Journal, Vol. 768, No. 1 (May., 2013): 89.en_US
dc.identifier.doi10.1088/0004-637x/768/1/89en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34824
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectsupernovae: individual (sn 1987a)en_US
dc.subjectcore-collapse supernovaeen_US
dc.subjectinner circumstellar ringen_US
dc.subjectcassiopeia-aen_US
dc.subjectsupernovaen_US
dc.subjectsn 1987aen_US
dc.subjectline emissionen_US
dc.subjectlight-curveen_US
dc.subjectchandra observationsen_US
dc.subjecthot-spotsen_US
dc.subjectremnanten_US
dc.subjectevolutionen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Morphology Of The Ejecta In Supernova 1987A: A Study Over Time And Wavelengthen_US
dc.typeArticleen_US

Access full-text files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
2013_05_supernova1987a.pdf
Size:
2.41 MB
Format:
Adobe Portable Document Format
Download

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.65 KB
Format:
Plain Text
Description:
Download

Collections

UT Faculty/Researcher Works