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Reconstructing the Scene: New Views of Supernovae and Progenitors from the SNSPOL Project

Published online by Cambridge University Press:  28 July 2017

Jennifer L. Hoffman Open the ORCID record for Jennifer L. Hoffman [Opens in a new window] ,
G. Grant Williams ,
Douglas C. Leonard ,
Christopher Bilinski ,
Luc Dessart ,
Leah N. Huk ,
Jon C. Mauerhan ,
Peter Milne ,
Amber L. Porter  and
Nathan Smith
...Show all authors
Jennifer L. Hoffman
Affiliation:
Department of Physics & Astronomy, University of Denver, 2112 E. Wesley Ave., Denver, CO 80210-6900, USA email: jennifer.hoffman@du.edu
G. Grant Williams
Affiliation:
MMT Observatory, P.O. Box 210065, University of Arizona, Tucson, AZ 85721-0065, USA Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA
Douglas C. Leonard
Affiliation:
Department of Astronomy, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-1221, USA
Christopher Bilinski
Affiliation:
Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA
Luc Dessart
Affiliation:
Unidad Mixta Internacional Franco-Chilena de Astronomía (CNRS UMI 3386), Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, Chile
Leah N. Huk
Affiliation:
Department of Physics & Astronomy, University of Denver, 2112 E. Wesley Ave., Denver, CO 80210-6900, USA email: jennifer.hoffman@du.edu
Jon C. Mauerhan
Affiliation:
Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
Peter Milne
Affiliation:
Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA
Amber L. Porter
Affiliation:
Department of Physics and Astronomy, Clemson University, 118 Kinard Laboratory, Clemson, SC 29634
Nathan Smith
Affiliation:
Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA
Paul S. Smith
Affiliation:
Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA
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Abstract

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Because polarization encodes geometrical information about unresolved scattering regions, it provides a unique tool for analyzing the 3-D structures of supernovae (SNe) and their surroundings. SNe of all types exhibit time-dependent spectropolarimetric signatures produced primarily by electron scattering. These signatures reveal physical phenomena such as complex velocity structures, changing illumination patterns, and asymmetric morphologies within the ejecta and surrounding material. Interpreting changes in polarization over time yields unprecedentedly detailed information about supernovae, their progenitors, and their evolution.

Begun in 2012, the SNSPOL Project continues to amass the largest database of time-dependent spectropolarimetric data on SNe. I present an overview of the project and its recent results. In the future, combining such data with interpretive radiative transfer models will further constrain explosion mechanisms and processes that shape SN ejecta, uncover new relationships among SN types, and probe the properties of progenitor winds and circumstellar material.

Keywords

polarizationastronomical databases:miscellaneoussupernovae: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 54 - 58
Copyright
Copyright © International Astronomical Union 2017 

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