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Record-breaking polarization from the interacting superluminous supernova 2017hcc
Jon C. Mauerhan, Nathan Smith, G. Grant Williams +12
We present multiepoch spectropolarimetry of the superluminous interacting Type IIn supernova SN2017hcc, covering 16 to 391 days after explosion. In our first epoch we measure conti…
Infrared Spectropolarimetric Detection of Intrinsic Polarization from a Core-Collapse Supernova
Samaporn Tinyanont, Maxwell Millar-Blanchaer, Mansi Kasliwal +8
Massive stars die an explosive death as a core-collapse supernova (CCSN). The exact physical processes that cause the collapsing star to rebound into an explosion are not well-unde…
SN 2014ab: An Aspherical Type IIn Supernova with Low Polarization
Christopher Bilinski, Nathan Smith, G. Grant Williams +20
We present photometry, spectra, and spectropolarimetry of supernova (SN) 2014ab, obtained through days after peak brightness. SN 2014ab was a luminous Type IIn SN ($M_V…
Spectral signatures of H-rich material stripped from a non-degenerate companion by a Type Ia supernova
Luc Dessart, Douglas C. Leonard, Jose L. Prieto
The single-degenerate scenario for Type Ia supernovae (SNe Ia) should yield metal-rich ejecta that enclose some stripped material from the non-degenerate H-rich companion star. We…
The Berkeley Sample of Stripped-Envelope Supernovae
Isaac Shivvers, Alexei V. Filippenko, Jeffrey M. Silverman +22
We present the complete sample of stripped-envelope supernova (SN) spectra observed by the Lick Observatory Supernova Search (LOSS) collaboration over the last three decades: 888 s…
SN2012ab: A Peculiar Type IIn Supernova with Aspherical Circumstellar Material
Christopher Bilinski, Nathan Smith, G. Grant Williams +18
We present photometry, spectra, and spectropolarimetry of supernova (SN) 2012ab, mostly obtained over the course of days after discovery. SN 2012ab was a Type IIn (SN II…
Spectropolarimetry of SN 2011dh in M51: geometric insights on a Type IIb supernova progenitor and explosion
Jon C. Mauerhan, G. Grant Williams, Douglas C. Leonard +11
We present seven epochs of spectropolarimetry of the Type IIb supernova (SN) 2011dh in M51, spanning 86 days of its evolution. The first epoch was obtained 9 days after the explosi…
Multi-epoch spectropolarimetry of SN 2009ip: direct evidence for aspherical circumstellar material
Jon C. Mauerhan, G. Grant Williams, Nathan Smith +8
We present spectropolarimetry of SN 2009ip throughout the evolution of its 2012 explosion. During the initial 2012a phase, when the source spectrum exhibits broad P-Cygni lines, we…
Hubble Space Telescope and Ground-Based Observations of the Type Iax Supernovae SN 2005hk and SN 2008A
Curtis McCully, Saurabh W. Jha, Ryan J. Foley +24
We present Hubble Space Telescope (HST) and ground-based optical and near-infrared observations of SN 2005hk and SN 2008A, typical members of the Type Iax class of supernovae (SNe)…
A Spectropolarimetric Comparison of the Type II-Plateau Supernovae SN 2008bk and SN 2004dj
Douglas C. Leonard, Luc Dessart, D. John Hillier +1
The Type II-Plateau supernova (SN II-P) SN 2004dj was the first SN II-P for which spectropolarimetry data were obtained with fine temporal sampling before, during, and after the fa…
On the Progenitors of Core-Collapse Supernovae
Douglas C. Leonard
Theory holds that a star born with an initial mass between about 8 and 140 times the mass of the Sun will end its life through the catastrophic gravitational collapse of its iron c…
An Unusually Fast-Evolving Supernova
Dovi Poznanski, Ryan Chornock, Peter E. Nugent +6
Analyses of supernovae (SNe) have revealed two main types of progenitors: exploding white dwarfs and collapsing massive stars. We present SN2002bj, which stands out as different fr…
Seeking Core-Collapse Supernova Progenitors in Pre-Explosion Images
Douglas C. Leonard
I summarize what we have learned about the nature of stars that ultimately explode as core-collapse supernovae from the examination of images taken prior to the explosion. By regis…
Type Ia supernova science 2010-2020
D. A. Howell, A. Conley, M. Della Valle +47
In the next decade Type Ia supernovae (SNe Ia) will be used to test theories predicting changes in the Dark Energy equation of state with time. Ultimately this requires a dedicated…
O/IR Polarimetry for the 2010 Decade (SSE): Science at the Edge, Sharp Tools for All
Jennifer L. Hoffman, Dean C. Hines, Andy Adamson +16
Science opportunities and recommendations concerning optical/infrared polarimetry for the upcoming decade in the fields of stars and stellar evolution. Community-based White Paper…
O/IR Polarimetry for the 2010 Decade (PSF): Science at the Edge, Sharp Tools for All
Dan Clemens, B. -G. Andersson, Andy Adamson +16
Science opportunities and recommendations concerning optical/infrared polarimetry for the upcoming decade in the fields of planetary systems and star formation. Community-based Whi…