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Discovery of a Rela...
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Soderberg, A. M.
(author)
Discovery of a Relativistic Supernova Without a Gamma-ray Trigger
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Numbers
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LIBRIS-ID:oai:DiVA.org:su-36303
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-36303URI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:pop swepub-contenttype
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Subject category:ovr swepub-publicationtype
Notes
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Type Ibc supernovae (SNe Ibc) mark the gravitational collapse of some massive stars (M > 20 Msun) propelling several solar masses of material to typical velocities of ~10,000 km/s. The closely-related but exceedingly rare class of long-duration gamma-ray bursts (GRBs) produce, in addition, a relativistic outflow powered by a central engine (accreting black hole or neutron star) and have been found exclusively through their gamma-ray signal. Here we report the discovery of luminous radio emission from the seemingly ordinary Type Ibc SN 2009bb which outshines that of all other SNe Ibc observed on a comparable timescale. These observations require a substantial mildly-relativistic outflow and indicate that the explosion was powered by a central engine, thus representing the first such event discovered without the aid of a gamma-ray trigger. A comparison with our extensive radio survey of SNe Ibc reveals that the fraction of such events is low (roughly 1 percent), measured independently from, and yet consistent with, the inferred rate of nearby GRBs. This discovery marks the observational realization that long-wavelength surveys will soon rival gamma-ray satellites in pinpointing nearby engine-driven explosions.
Subject headings and genre
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Astrophysics - High Energy Astrophysical Phenomena
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Astrophysics - Cosmology and Extragalactic Astrophysics
Added entries (persons, corporate bodies, meetings, titles ...)
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Chakraborti, S.
(author)
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Pignata, G.
(author)
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Chevalier, R. A.
(author)
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Chandra, P.
(author)
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Ray, A.
(author)
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Wieringa, M. H.
(author)
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Copete, A.
(author)
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Chaplin, V.
(author)
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Connaughton, V.
(author)
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Barthelmy, S. D.
(author)
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Bietenholz, M. F.
(author)
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Chugai, N.
(author)
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Stritzinger, M. D.
(author)
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Hamuy, M.
(author)
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Fransson, C.Stockholms universitet,Institutionen för astronomi(Swepub:su)frans
(author)
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Fox, O.
(author)
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Levesque, E. M.
(author)
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Grindlay, J. E.
(author)
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Challis, P.
(author)
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Foley, R. J.
(author)
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Kirshner, R. P.
(author)
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Milne, P. A.
(author)
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Torres, M. A. P.
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
Internet link
To the university's database
- By the author/editor
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Soderberg, A. M.
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Chakraborti, S.
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Pignata, G.
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Chevalier, R. A.
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Chandra, P.
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Ray, A.
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show more...
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Wieringa, M. H.
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Copete, A.
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Chaplin, V.
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Connaughton, V.
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Barthelmy, S. D.
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Bietenholz, M. F ...
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Chugai, N.
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Stritzinger, M. ...
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Hamuy, M.
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Fransson, C.
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Fox, O.
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Levesque, E. M.
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Grindlay, J. E.
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Challis, P.
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Foley, R. J.
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Kirshner, R. P.
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Milne, P. A.
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Torres, M. A. P.
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show less...
- By the university
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Stockholm University