SN 1998bw
 | |
| Type Ic | |
| Date | 26 April 1998 |
|---|---|
| Constellation | Telescopium |
| Right ascension | 19h35m03.30s |
| Declination | −52° 50′ 45.9″ |
| Galactic coordinates | 344.99°, −27.72° |
| Redshift | 0.0085 |
| Host | ESO 184-G82 |
| Other designations | SN 1998bw, AAVSO 1927-53, GRB 980425 |
SN 1998bwwas a rare broad-lined Type Ic[1]gamma ray burstsupernovadetected on 26 April 1998 in theESO 184-G82spiral galaxy,which some astronomers believe may be an example of acollapsar(hypernova).[2]The hypernova has been linked toGRB 980425,which was detected on 25 April 1998, the first time a gamma-ray burst has been linked to a supernova.[3]The hypernova is approximately 140 million light years away, very close for a gamma ray burst source.[4]
The region of the galaxy where the supernova occurred hosts stars 5-8 million years old and is relatively free from dust. A nearby region hosts multipleWolf-Rayet starsless than 3 million years old, but it is unlikely that the supernova progenitor could be a runaway from that region. The implication is that the progenitor was a star originally 25-40M☉if it exploded as a single star at the end of its life.[5]
References
[edit]- ^Woosley, S. E.; Eastman, Ronald G.; Schmidt, Brian P. (1999)."Gamma-Ray Bursts and Type Ic Supernova SN 1998bw"(PDF).The Astrophysical Journal.516(2): 788–796.arXiv:astro-ph/9806299.Bibcode:1999ApJ...516..788W.doi:10.1086/307131.hdl:1885/94504.S2CID17690696.Archived fromthe original(PDF)on 2016-09-18.Retrieved2014-12-03.
- ^"Gamma-ray Burst 980425".RetrievedJune 11,2017.
- ^Vreeswijk, P.; Tanvir, N.; Galama, T. (2000)."Gamma-Ray Burst Afterglows: Surprises from the Sky".The ING Newsletter.2:5.Bibcode:2000INGN....2....5V.Retrieved2014-08-27.
- ^"A Strange Supernova with a Gamma-Ray Burst".European Southern Observatory.Retrieved2015-11-14.
- ^Krühler, Thomas; Kuncarayakti, Hanindyo;Schady, Patricia;Anderson, Joseph P.; Galbany, Lluís; Gensior, Jindra (2017). "Hot gas around SN 1998bw - Inferring the progenitor from its environment".Astronomy & Astrophysics.602(85): A85.arXiv:1702.05430.Bibcode:2017A&A...602A..85K.doi:10.1051/0004-6361/201630268.S2CID54903796.
External links
[edit]- Light curves and spectraArchived2017-10-23 at theWayback Machineon theOpen Supernova Catalog