TY - JOUR
T1 - An unusually fast-evolving supernova
AU - Poznanski, Dovi
AU - Chornock, Ryan
AU - Nugent, Peter E.
AU - Bloom, Joshua S.
AU - Filippenko, Alexei V.
AU - Ganeshalingam, Mohan
AU - Leonard, Douglas C.
AU - Li, Weidong
AU - Thomas, Rollin C.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - Analyses of supernovae (SNe) have revealed two main types of progenitors: exploding white dwarfs and collapsing massive stars. Here we describe SN 2002bj, which stands out as different from any SN reported to date. Its light curve rose and declined very rapidly, yet reached a peak intrinsic brightness greater than -18 magnitude. A spectrum obtained 7 days after discovery shows the presence of helium and intermediate-mass elements, yet no clear hydrogen or iron-peak elements. The spectrum only barely resembles that of a type Ia SN, with added carbon and helium. Its properties suggest that SN 2002bj may be representative of a class of progenitors that previously has been only hypothesized: a helium detonation on a white dwarf, ejecting a small envelope of material. New surveys should find many such objects, despite their scarcity.
AB - Analyses of supernovae (SNe) have revealed two main types of progenitors: exploding white dwarfs and collapsing massive stars. Here we describe SN 2002bj, which stands out as different from any SN reported to date. Its light curve rose and declined very rapidly, yet reached a peak intrinsic brightness greater than -18 magnitude. A spectrum obtained 7 days after discovery shows the presence of helium and intermediate-mass elements, yet no clear hydrogen or iron-peak elements. The spectrum only barely resembles that of a type Ia SN, with added carbon and helium. Its properties suggest that SN 2002bj may be representative of a class of progenitors that previously has been only hypothesized: a helium detonation on a white dwarf, ejecting a small envelope of material. New surveys should find many such objects, despite their scarcity.
UR - http://www.scopus.com/inward/record.url?scp=74849105635&partnerID=8YFLogxK
U2 - 10.1126/science.1181709
DO - 10.1126/science.1181709
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C2 - 19892941
AN - SCOPUS:74849105635
SN - 0036-8075
VL - 327
SP - 58
EP - 60
JO - Science
JF - Science
IS - 5961
ER -