publication . Article . Preprint . 2009

SN 2008iy: an unusual Type IIn Supernova with an enduring 400‐d rise time

N. Butler; Adam A. Miller; Josh Bloom; Wenbo Li; Nathan Smith; T. N. Steele; A. V. Filippenko; C. Klein; Mohan Ganeshalingam; Ryan Chornock; ...
Open Access
  • Published: 25 Nov 2009 Journal: Monthly Notices of the Royal Astronomical Society (issn: 0035-8711, eissn: 1365-2966, Copyright policy)
  • Publisher: Oxford University Press (OUP)
Abstract
We present spectroscopic and photometric observations of the Type IIn supernova (SN) 2008iy. SN 2008iy showed an unprecedentedly long rise time of ~400 days, making it the first SN to take significantly longer than 100 days to reach peak optical luminosity. The peak absolute magnitude of SN 2008iy was M_r ~ -19.1 mag, and the total radiated energy over the first ~700 days was ~2 x 10^50 erg. Spectroscopically, SN 2008iy is very similar to the Type IIn SN 1988Z at late times, and, like SN 1988Z, it is a luminous X-ray source (both supernovae had an X-ray luminosity L_ X > 10^41 erg/s). The Halpha emission profile of SN 2008iy shows a narrow P Cygni absorption com...
Subjects
free text keywords: Space and Planetary Science, Astronomy and Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics, Luminous blue variable, Pair-instability supernova, Astronomy, Supernova, Dwarf galaxy, Stellar mass, Astrophysics, Luminosity, Type II supernova, Physics, Galaxy
Funded by
NSF| Nearby Supernovae: Discovery at Birth and Follow-up Studies
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0908886
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
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