TY - JOUR
T1 - The he-rich core-collapse supernova 2007Y
T2 - Observations from X-ray to radio wavelengths
AU - Stritzinger, Maximilian
AU - Mazzali, Paolo
AU - Phillips, Mark M.
AU - Immler, Stefan
AU - Soderberg, Alicia
AU - Sollerman, Jesper
AU - Boldt, Luis
AU - Braithwaite, Jonathan
AU - Brown, Peter
AU - Burns, Christopher R.
AU - Contreras, Carlos
AU - Covarrubias, Ricardo
AU - Folatelli, Gastón
AU - Freedman, Wendy L.
AU - González, Sergio
AU - Hamuy, Mario
AU - Krzeminski, Wojtek
AU - Madore, Barry F.
AU - Milne, Peter
AU - Morrell, Nidia
AU - Persson, S. E.
AU - Roth, Miguel
AU - Smith, Mathew
AU - Suntzeff, Nicholas B.
PY - 2009/5/1
Y1 - 2009/5/1
N2 - A detailed study spanning approximately a year has been conducted on the Type Ib supernova (SN) 2007Y. Imaging was obtained from X-ray to radio wavelengths, and a comprehensive set of multi-band (w2m2w1u′g′ r′i′UBVYJHKs) light curves and optical spectroscopy is presented. A virtually complete bolometric light curve is derived, from which we infer a 56Ni mass of 0.06 M⊙. The early spectrum strongly resembles SN 2005bf and exhibits high-velocity features of Ca ii and Hα; during late epochs the spectrum shows evidence of an ejecta-wind interaction. Nebular emission lines have similar widths and exhibit profiles that indicate a lack of major asymmetry in the ejecta. Late phase spectra are modeled with a non-LTE code, from which we find 56Ni, O, and total-ejecta masses (excluding He) to be 0.06, 0.2, and 0.42 M⊙, respectively, below 4500 km s-1. The 56Ni mass confirms results obtained from the bolometric light curve. The oxygen abundance suggests that the progenitor was most likely a ≈3.3 M⊙ He core star that evolved from a zero-age-main-sequence mass of 10-13 M⊙. The explosion energy is determined to be ≈1050 erg, and the mass-loss rate of the progenitor is constrained from X-ray and radio observations to be ≤ 10-6 M⊙ yr-1. SN 2007Y is among the least energetic normal Type Ib SNe ever studied.
AB - A detailed study spanning approximately a year has been conducted on the Type Ib supernova (SN) 2007Y. Imaging was obtained from X-ray to radio wavelengths, and a comprehensive set of multi-band (w2m2w1u′g′ r′i′UBVYJHKs) light curves and optical spectroscopy is presented. A virtually complete bolometric light curve is derived, from which we infer a 56Ni mass of 0.06 M⊙. The early spectrum strongly resembles SN 2005bf and exhibits high-velocity features of Ca ii and Hα; during late epochs the spectrum shows evidence of an ejecta-wind interaction. Nebular emission lines have similar widths and exhibit profiles that indicate a lack of major asymmetry in the ejecta. Late phase spectra are modeled with a non-LTE code, from which we find 56Ni, O, and total-ejecta masses (excluding He) to be 0.06, 0.2, and 0.42 M⊙, respectively, below 4500 km s-1. The 56Ni mass confirms results obtained from the bolometric light curve. The oxygen abundance suggests that the progenitor was most likely a ≈3.3 M⊙ He core star that evolved from a zero-age-main-sequence mass of 10-13 M⊙. The explosion energy is determined to be ≈1050 erg, and the mass-loss rate of the progenitor is constrained from X-ray and radio observations to be ≤ 10-6 M⊙ yr-1. SN 2007Y is among the least energetic normal Type Ib SNe ever studied.
KW - Galaxies: individual (NGC 1187)
KW - Supernovae: general
KW - Supernovae: individual (SN 2007Y)
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U2 - 10.1088/0004-637X/696/1/713
DO - 10.1088/0004-637X/696/1/713
M3 - Article
AN - SCOPUS:71849118687
SN - 0004-637X
VL - 696
SP - 713
EP - 728
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
ER -