SN 2005cs

SN 2005cs
Event typeSupernova
Type IIp[1]
Datec. 27.4 million years ago
(discovered 28 June 2005 by Wolfgang Kloehr)
ConstellationCanes Venatici
Right ascension13h 29m 53.37s[2]
Declination+47° 10′ 28.2″[2]
EpochJ2000
Distance27.4 ± 2.3 Mly (8.4 ± 0.7 Mpc)[3]
HostWhirlpool Galaxy[3]
Progenitor7–13 M☉[4]
Progenitor typeRed Supergiant[3]
Colour (B-V)0.14 ±0.02
Peak apparent magnitude14.5[1]
Other designationsSN 2005cs
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SN 2005cs was a supernova in the spiral galaxy M51,[3] known as the Whirlpool Galaxy. It was a type II-P core-collapse supernova, discovered June 28, 2005 by Wolfgang Kloehr, a German amateur astronomer.[5] The event was positioned at an offset of 15″ west and 78″ south of the galactic nucleus of M51.[2] Based on the data, the explosion was inferred to occur 2.8 days before discovery.[6] It was considered under-luminous for a supernova of its type, releasing an estimated 3×1050 erg in energy.[4]

The progenitor star was identified from a Hubble Space Telescope image taken January 20–21, 2005. It was a red supergiant with a spectral type in the mid-K to late-M type range and an estimated initial (ZAMS) mass of 9+3
−2 M☉. A higher mass star enshrouded in a cocoon of dust has been ruled out.[7]

  1. ^ a b Cite error: The named reference Barbon_et_al_2008 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Kloehr_et_al_2005 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Vinkó_et_al_2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Pastorello_et_al_2009 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Bishop2014 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Dessart_et_al_2008 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Maund_et_al_2005 was invoked but never defined (see the help page).