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Article: Spatially resolved STIS spectroscopy of SN 1987A: Evidence for shock interaction with circumstellar gas

TitleSpatially resolved STIS spectroscopy of SN 1987A: Evidence for shock interaction with circumstellar gas
Authors
KeywordsCircumstellar Matter
Supernova Remnants
Supernovae: Individual (Sn 1987A)
Issue Date1998
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 1998, v. 492 n. 2 PART II, p. L139-L142 How to Cite?
AbstractVisual and ultraviolet spatially resolved (∼0″.1) spectra of SN 1987A obtained on days 3715 and 3743 with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope show that the high-velocity supernova debris is colliding with circumstellar gas. Very broad Lyα emission with velocities extending to ∼± 20,000 km s -1 originates inside the inner circumstellar ring and appears to fill most of the surface area within 0″.67 ±0″.03 (0.14 pc at a distance of 50 kpc) of the ring's center. The observed Lyα flux from the shocked ejecta is (1.85 ± 0.53) × 10 -13 and (1.25 ± 0.51) × 10 -12 ergs cm -2 s -l after correcting for extinction. A spatially unresolved blueshifted emission feature was discovered in Ha (and other lines) on the inner ring at position angle 31° ± 8°. The Hα emission extends to -250 km s -1 with no corresponding redshifted emission. This highly localized interaction appears to be the initial contact of the supernova blast wave with an inward protrusion of the inner ring. The broad Lyα emission and the "hot spot" are separate interaction phenomena associated with the reverse and forward shocks, respectively. We also find that the size of the inner ring in forbidden lines of oxygen has a dependence on ionization potential, in agreement with photoionization models of the ring. © 1998. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/174969
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
References

 

DC FieldValueLanguage
dc.contributor.authorSonneborn, Gen_US
dc.contributor.authorPun, CSJen_US
dc.contributor.authorKimble, RAen_US
dc.contributor.authorGull, TRen_US
dc.contributor.authorLundqvist, Pen_US
dc.contributor.authorMccray, Ren_US
dc.contributor.authorPlait, Pen_US
dc.contributor.authorBoggess, Aen_US
dc.contributor.authorBowers, CWen_US
dc.contributor.authorDanks, ACen_US
dc.contributor.authorGrady, Jen_US
dc.contributor.authorHeap, SRen_US
dc.contributor.authorKraemer, Sen_US
dc.contributor.authorLindler, Den_US
dc.contributor.authorLoiacono, Jen_US
dc.contributor.authorMaran, SPen_US
dc.contributor.authorMoos, HWen_US
dc.contributor.authorWoodgate, BEen_US
dc.date.accessioned2012-11-26T08:48:26Z-
dc.date.available2012-11-26T08:48:26Z-
dc.date.issued1998en_US
dc.identifier.citationAstrophysical Journal Letters, 1998, v. 492 n. 2 PART II, p. L139-L142en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/174969-
dc.description.abstractVisual and ultraviolet spatially resolved (∼0″.1) spectra of SN 1987A obtained on days 3715 and 3743 with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope show that the high-velocity supernova debris is colliding with circumstellar gas. Very broad Lyα emission with velocities extending to ∼± 20,000 km s -1 originates inside the inner circumstellar ring and appears to fill most of the surface area within 0″.67 ±0″.03 (0.14 pc at a distance of 50 kpc) of the ring's center. The observed Lyα flux from the shocked ejecta is (1.85 ± 0.53) × 10 -13 and (1.25 ± 0.51) × 10 -12 ergs cm -2 s -l after correcting for extinction. A spatially unresolved blueshifted emission feature was discovered in Ha (and other lines) on the inner ring at position angle 31° ± 8°. The Hα emission extends to -250 km s -1 with no corresponding redshifted emission. This highly localized interaction appears to be the initial contact of the supernova blast wave with an inward protrusion of the inner ring. The broad Lyα emission and the "hot spot" are separate interaction phenomena associated with the reverse and forward shocks, respectively. We also find that the size of the inner ring in forbidden lines of oxygen has a dependence on ionization potential, in agreement with photoionization models of the ring. © 1998. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectCircumstellar Matteren_US
dc.subjectSupernova Remnantsen_US
dc.subjectSupernovae: Individual (Sn 1987A)en_US
dc.titleSpatially resolved STIS spectroscopy of SN 1987A: Evidence for shock interaction with circumstellar gasen_US
dc.typeArticleen_US
dc.identifier.emailPun, CSJ: jcspun@hkucc.hku.hken_US
dc.identifier.authorityPun, CSJ=rp00772en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-26344461663en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-26344461663&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume492en_US
dc.identifier.issue2 PART IIen_US
dc.identifier.spageL139en_US
dc.identifier.epageL142en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridSonneborn, G=7006137500en_US
dc.identifier.scopusauthoridPun, CSJ=7003931846en_US
dc.identifier.scopusauthoridKimble, RA=7005778884en_US
dc.identifier.scopusauthoridGull, TR=7007163365en_US
dc.identifier.scopusauthoridLundqvist, P=7004499555en_US
dc.identifier.scopusauthoridMcCray, R=35954431900en_US
dc.identifier.scopusauthoridPlait, P=6603448041en_US
dc.identifier.scopusauthoridBoggess, A=7004509542en_US
dc.identifier.scopusauthoridBowers, CW=35602562300en_US
dc.identifier.scopusauthoridDanks, AC=8206684100en_US
dc.identifier.scopusauthoridGrady, J=7004900722en_US
dc.identifier.scopusauthoridHeap, SR=7006202699en_US
dc.identifier.scopusauthoridKraemer, S=7102267525en_US
dc.identifier.scopusauthoridLindler, D=7003839081en_US
dc.identifier.scopusauthoridLoiacono, J=6603660119en_US
dc.identifier.scopusauthoridMaran, SP=7003703651en_US
dc.identifier.scopusauthoridMoos, HW=7006436101en_US
dc.identifier.scopusauthoridWoodgate, BE=7005936713en_US

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