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SN 2011dh

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SN 2011dh
Event typeSupernovaEdit this on Wikidata
IIb[1][2]
Date31 May 2011[3]
ConstellationCanes Venatici
Right ascension13h30m05.08s[4][5]
Declination+47° 10′ 11.2″[4][5]
EpochJ2000
HostWhirlpool Galaxy(M51)
Progenitor?
Progenitor typeyellow supergiant[6][7]
Colour(B-V)?
Peakapparent magnitude12.1[8]
Other designationsSN 2011dh, [RMS2015] J133005+471010

SN 2011dhwas asupernovain theWhirlpool Galaxy(M51). It was discovered on 31 May 2011, with anapparent magnitude13.5.[4]and confirmed by several sources, including thePalomar Transient Factory.[5]A candidate progenitor was detected inHubble Space Telescopeimages.[9]The progenitor may have been a highly luminousyellow supergiantwith an initial mass of 18-24solar masses.[6]The supernova peaked nearapparent magnitude12.1 on 19 June 2011.[8]Emission spectraindicated that the explosion was atype II supernova,in which a massive star collapses oncenuclear fusionhas ceased in its core.[4]

SN2011dh was the third supernova to be recorded in the Whirlpool galaxy since 1994 (followingSN 1994IandSN 2005cs).[10]The supernova frequency in theMilky Wayis estimated to be around one event every 40 years.[11]

References

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  1. ^"ATEL 3413: PTF11eon/SN2011dh is Possibly a Type IIb Event".Astronomers Telegram. 2011-06-08.Retrieved2011-06-08.
  2. ^"Early Optical Spectroscopy of SN 2011dh in M51".Astronomers Telegram. 2011-06-12.Retrieved2011-06-14.
  3. ^Kelly Beatty (June 3, 2011)."Supernova Erupts in Whirlpool Galaxy".Sky and Telescope.Retrieved2011-06-06.
  4. ^abcdRichard Kinne (kqr) (2011-06-03)."AAVSO Special Notice #241: New Supernova in M51".AAVSO.Retrieved2011-06-06.
  5. ^abc"ATEL 3398: PTF Discovery of a Type II Supernova in M51".Astronomers Telegram. 2011-06-03.Retrieved2011-06-06.
  6. ^ab"ATEL 3401: Properties of the Candidate Progenitor of SN 2011dh in M51".Astronomers Telegram. 2011-06-03.Retrieved2011-06-06.
  7. ^Matson, John (2013). "Sayonara, Supergiant".Scientific American.309(5): 18–9.doi:10.1038/scientificamerican1113-18a.PMID24283007.
  8. ^abDavid Bishop."Supernovae 2011dh in M51".supernovae.net (International Supernovae Network).Retrieved2011-06-06.
  9. ^"ATEL 3399: POSSIBLE PROGENITOR OF THE NEW TYPE II SN IN M51".Astronomers Telegram. 2011-06-03.Retrieved2011-06-06.
  10. ^Nemiroff, R.; Bonnell, J., eds. (5 June 2011)."Another Nearby Supernova in the Whirlpool Galaxy".Astronomy Picture of the Day.NASA.
  11. ^Tammann, G. A.; Loeffler, W.; Schroeder, A. (June 1994)."The Galactic supernova rate".The Astrophysical Journal Supplement Series.92(2): 487–493.Bibcode:1994ApJS...92..487T.doi:10.1086/192002.
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