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Article: High-velocity Lyα emission from SNR 1987A

TitleHigh-velocity Lyα emission from SNR 1987A
Authors
KeywordsCircumstellar Matter
Hydrodynamics
Supernovae: Individual (Sn 1987A)
Ultraviolet: Ism
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. L143-L146 How to Cite?
AbstractThe high-velocity Lyα emission from SN 1987A observed with the Space Telescope Imaging Spectrograph (STIS) evidently comes from a reverse shock formed where the outer envelope of SN 1987A strikes ionized gas inside the inner circumstellar ring. The observations can be explained by a simple kinematic model, in which the Lyα emission comes from hydrogen atoms with radial velocity ∼15,000 km s-1 crossing a reverse shock in the shape of a slightly prolate ellipsoid with equatorial radius 4.8 × 1017 cm or ∼80% of the distance to the inner surface of the inner ring. N v λλ1239, 1243 emission, if present, has a net luminosity ≲30% times that of the Lyα emission. Future STIS observations should enable us to predict the time of impact with the inner ring and to determine unambiguously whether or not N v emission is present. These observations will offer a unique opportunity to probe the structure of SN 1987A's circumstellar environment and the hydrodynamics and kinetics of very fast shocks. © 1998. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/174852
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
References

 

DC FieldValueLanguage
dc.contributor.authorMichael, Een_US
dc.contributor.authorMccray, Ren_US
dc.contributor.authorBorkowski, KJen_US
dc.contributor.authorPun, CSJen_US
dc.contributor.authorSonneborn, Gen_US
dc.date.accessioned2012-11-26T08:47:49Z-
dc.date.available2012-11-26T08:47:49Z-
dc.date.issued1998en_US
dc.identifier.citationAstrophysical Journal Letters, 1998, v. 492 n. 2 PART II, p. L143-L146en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/174852-
dc.description.abstractThe high-velocity Lyα emission from SN 1987A observed with the Space Telescope Imaging Spectrograph (STIS) evidently comes from a reverse shock formed where the outer envelope of SN 1987A strikes ionized gas inside the inner circumstellar ring. The observations can be explained by a simple kinematic model, in which the Lyα emission comes from hydrogen atoms with radial velocity ∼15,000 km s-1 crossing a reverse shock in the shape of a slightly prolate ellipsoid with equatorial radius 4.8 × 1017 cm or ∼80% of the distance to the inner surface of the inner ring. N v λλ1239, 1243 emission, if present, has a net luminosity ≲30% times that of the Lyα emission. Future STIS observations should enable us to predict the time of impact with the inner ring and to determine unambiguously whether or not N v emission is present. These observations will offer a unique opportunity to probe the structure of SN 1987A's circumstellar environment and the hydrodynamics and kinetics of very fast shocks. © 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.subjectHydrodynamicsen_US
dc.subjectSupernovae: Individual (Sn 1987A)en_US
dc.subjectUltraviolet: Ismen_US
dc.titleHigh-velocity Lyα emission from SNR 1987Aen_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-s2.0-0039884409en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0039884409&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume492en_US
dc.identifier.issue2 PART IIen_US
dc.identifier.spageL143en_US
dc.identifier.epageL146en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridMichael, E=7004899413en_US
dc.identifier.scopusauthoridMccray, R=35954431900en_US
dc.identifier.scopusauthoridBorkowski, KJ=7005527694en_US
dc.identifier.scopusauthoridPun, CSJ=7003931846en_US
dc.identifier.scopusauthoridSonneborn, G=7006137500en_US

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