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8 solar masses) that have run out of nuclear fuel. Normally one would expect to see evidence of hydrogen and helium, but when these supernova occur in a binary system the companion has sometimes gravitationally stripped the outer layers of the progenitor star away, leaving only the heavier elements. Type Ib supernovae have no hydrogen, while Type Ics have neither hydrogen or helium.
Over the following weeks Alexei Filippenko et al. and the University of California at Berkeley discovered prominent He I absorption lines, thus changing the classification of the supernova to Type Ib.16h 21m 48s -2° 17' 00", Taken 16 Aug 09 02:17:13 UTC, Teide2 HM, 14-inch f/11 Schmidt-Cassegrain, SBIG ST-10XME CCD Camera, Sky Rating 3.9' title='NGC 6118 - From my misison to NGC 6118 (see other images and descriptions in My Missions).
You can't really see it, but the arrow points to where the supernova would be if you could. SN 2004dk was first reported by James Graham and Weidong Li on 1 August 2004. They found the new supernova by studying images produced by the Lick Observatory Supernova Search (LOSS) program with the 76 cm Katzman Automatic Imaging Telescope (KAIT) in San Jose, CA.[4]
SN 2004dk was initially classified by European Southern Observatory astronomer Fernando Patat et al. on 4 Aug 2004 as a Type Ic supernova.[5] Type Ib and Ic supernovae are the end result of massive stars (> 8 solar masses) that have run out of nuclear fuel. Normally one would expect to see evidence of hydrogen and helium, but when these supernova occur in a binary system the companion has sometimes gravitationally stripped the outer layers of the progenitor star away, leaving only the heavier elements. Type Ib supernovae have no hydrogen, while Type Ics have neither hydrogen or helium.
Over the following weeks Alexei Filippenko et al. and the University of California at Berkeley discovered prominent He I absorption lines, thus changing the classification of the supernova to Type Ib.16h 21m 48s -2° 17' 00", Taken 16 Aug 09 02:17:13 UTC, Teide2 HM, 14-inch f/11 Schmidt-Cassegrain, SBIG ST-10XME CCD Camera, Sky Rating 3.9' border=0 width=150 src='http://www.myslooh.com/data/members/70621/1250536444.jpg'>
8 solar masses) that have run out of nuclear fuel. Normally one would expect to see evidence of hydrogen and helium, but when these supernova occur in a binary system the companion has sometimes gravitationally stripped the outer layers of the progenitor star away, leaving only the heavier elements. Type Ib supernovae have no hydrogen, while Type Ics have neither hydrogen or helium.
Over the following weeks Alexei Filippenko et al. and the University of California at Berkeley discovered prominent He I absorption lines, thus changing the classification of the supernova to Type Ib.16h 21m 48s -2° 17' 00", Taken 16 Aug 09 02:17:13 UTC, Teide2 HM, 14-inch f/11 Schmidt-Cassegrain, SBIG ST-10XME CCD Camera, Sky Rating 3.9' title='NGC 6118 - From my misison to NGC 6118 (see other images and descriptions in My Missions).
You can't really see it, but the arrow points to where the supernova would be if you could. SN 2004dk was first reported by James Graham and Weidong Li on 1 August 2004. They found the new supernova by studying images produced by the Lick Observatory Supernova Search (LOSS) program with the 76 cm Katzman Automatic Imaging Telescope (KAIT) in San Jose, CA.[4]
SN 2004dk was initially classified by European Southern Observatory astronomer Fernando Patat et al. on 4 Aug 2004 as a Type Ic supernova.[5] Type Ib and Ic supernovae are the end result of massive stars (> 8 solar masses) that have run out of nuclear fuel. Normally one would expect to see evidence of hydrogen and helium, but when these supernova occur in a binary system the companion has sometimes gravitationally stripped the outer layers of the progenitor star away, leaving only the heavier elements. Type Ib supernovae have no hydrogen, while Type Ics have neither hydrogen or helium.
Over the following weeks Alexei Filippenko et al. and the University of California at Berkeley discovered prominent He I absorption lines, thus changing the classification of the supernova to Type Ib.16h 21m 48s -2° 17' 00", Taken 16 Aug 09 02:17:13 UTC, Teide2 HM, 14-inch f/11 Schmidt-Cassegrain, SBIG ST-10XME CCD Camera, Sky Rating 3.9' src='/include/render_title.php?font=script&fontsize=16&fg=D8D8D8&bg=0017A4&text=NGC+6118'> |
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