MULTI-WAVELENGTH OBSERVATIONS OF SUPERNOVA 2011ei: TIME-DEPENDENT CLASSIFICATION OF TYPE IIb AND Ib SUPERNOVAE AND IMPLICATIONS FOR THEIR PROGENITORS
Author
dc.contributor.author
Vljevic, Dan Milisa
Author
dc.contributor.author
Margutti, Raffaella
es_CL
Author
dc.contributor.author
Soderberg, Alicia
es_CL
Author
dc.contributor.author
Pignata Libralato, Giuliano
es_CL
Author
dc.contributor.author
Chomiuk, Laura
es_CL
Author
dc.contributor.author
Fesen, Robert A.
es_CL
Author
dc.contributor.author
Bufano, Filomena
es_CL
Author
dc.contributor.author
Sanders, Nathan E.
es_CL
Author
dc.contributor.author
Parrent, Jerod T.
es_CL
Author
dc.contributor.author
Parker, Stuart
es_CL
Author
dc.contributor.author
Mazzali, Paolo
es_CL
Author
dc.contributor.author
Pian, Elena
es_CL
Author
dc.contributor.author
Pickering, Timothy
es_CL
Author
dc.contributor.author
Buckley, David A.
es_CL
Author
dc.contributor.author
Crawford, Steven M.
es_CL
Author
dc.contributor.author
Gulbis, Amanda A.
es_CL
Author
dc.contributor.author
Hettlage, Christian
es_CL
Author
dc.contributor.author
Hooper, Eric
es_CL
Author
dc.contributor.author
Nordsieck, Kenneth H.
es_CL
Author
dc.contributor.author
O’Donoghue, Darragh
es_CL
Author
dc.contributor.author
Husser, Tim Oliver
es_CL
Author
dc.contributor.author
Potter, Stephen
es_CL
Author
dc.contributor.author
Kniazev, Alexei
es_CL
Author
dc.contributor.author
Kotze, Paul
es_CL
Author
dc.contributor.author
Romero Colmenero, Encarni
es_CL
Author
dc.contributor.author
Vaisanen, Petri
es_CL
Author
dc.contributor.author
Wolf, Marsha
es_CL
Author
dc.contributor.author
Bietenholz, Michael F.
es_CL
Author
dc.contributor.author
Bartel, Norbert
es_CL
Author
dc.contributor.author
Fransson, Claes
es_CL
Author
dc.contributor.author
Walker, Emma S.
es_CL
Author
dc.contributor.author
Brunthaler, Andreas
es_CL
Author
dc.contributor.author
Chakraborti, Sayan
es_CL
Author
dc.contributor.author
Levesque, Emily M.
es_CL
Author
dc.contributor.author
MacFadyen, Andrew
es_CL
Author
dc.contributor.author
Drescher, Colin
es_CL
Author
dc.contributor.author
Bock, Greg
es_CL
Author
dc.contributor.author
Marples, Peter
es_CL
Author
dc.contributor.author
Anderson, Joseph P.
es_CL
Author
dc.contributor.author
Benetti, Stefano
es_CL
Author
dc.contributor.author
Reichart, Daniel
es_CL
Author
dc.contributor.author
Ivarsen, Kevin
es_CL
Admission date
dc.date.accessioned
2014-02-14T17:12:06Z
Available date
dc.date.available
2014-02-14T17:12:06Z
Publication date
dc.date.issued
2013-04
Cita de ítem
dc.identifier.citation
The Astrophysical Journal, 767:71 (19pp), 2013
en_US
Identifier
dc.identifier.other
doi:10.1088/0004-637X/767/1/71
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/126407
General note
dc.description
Artículo de publicación ISI
en_US
Abstract
dc.description.abstract
We present X-ray, UV/optical, and radio observations of the stripped-envelope, core-collapse supernova (SN)
2011ei, one of the least luminous SNe IIb or Ib observed to date. Our observations begin with a discovery within
∼1 day of explosion and span several months afterward. Early optical spectra exhibit broad, Type II-like hydrogen
Balmer profiles that subside rapidly and are replaced by Type Ib-like He-rich features on a timescale of one week.
High-cadence monitoring of this transition suggests absorption attributable to a high-velocity ( 12,000 km s−1)
H-rich shell, which is likely present in many Type Ib events. Radio observations imply a shock velocity of
v ≈ 0.13 c and a progenitor star average mass-loss rate of M˙ ≈ 1.4 × 10−5 M yr−1 (assuming wind velocity
vw = 103 km s−1). This is consistent with independent constraints from deep X-ray observations with Swift-XRT
and Chandra. Overall, the multi-wavelength properties of SN 2011ei are consistent with the explosion of a lowermass
(3–4 M ), compact (R∗ 1 × 1011 cm), He-core star. The star retained a thin hydrogen envelope at the
time of explosion, and was embedded in an inhomogeneous circumstellar wind suggestive of modest episodic mass
loss. We conclude that SN 2011ei’s rapid spectral metamorphosis is indicative of time-dependent classifications
that bias estimates of the relative explosion rates for Type IIb and Ib objects, and that important information about
a progenitor star’s evolutionary state and mass loss immediately prior to SN explosion can be inferred from timely
multi-wavelength observations.