University of Hertfordshire

From the same journal

From the same journal

By the same authors

Locations of Peculiar Supernovae as a Diagnostic of Their Origins

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  • 1304.2400

    Accepted author manuscript, 262 KB, PDF document

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  • Fang Yuan
  • Chiaki Kobayashi
  • Brian P. Schmidt
  • Philipp Podsiadlowski
  • Stuart A. Sim
  • Richard A. Scalzo
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Original languageEnglish
Pages (from-to)1680-1686
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume432
Issue2
Early online date1 May 2013
DOIs
Publication statusPublished - 21 Jun 2013

Abstract

We put constraints on the properties of the progenitors of peculiar calcium-rich transients using the distribution of locations within their host galaxies. We confirm that this class of transients do not follow the galaxy stellar mass profile and are more likely to be found in remote locations of their apparent hosts. We test the hypothesis that these transients are from low metallicity progenitors by comparing their spatial distributions with the predictions of self-consistent cosmological simulations that include star formation and chemical enrichment. We find that while metal-poor stars and our transient sample show a consistent preference for large offsets, metallicity alone cannot explain the extreme cases. Invoking a lower age limit on the progenitor helps to improve the match, indicating these events may result from a very old metal-poor population. We also investigate the radial distribution of globular cluster systems, and show that they too are consistent with the class of calcium-rich transients. Because photometric upper limits exist for globular clusters for some members of the class, a production mechanism related to the dense environment of globular clusters is not favoured for the calcium-rich events. However the methods developed in this paper may be used in the future to constrain the effects of low metallicity on radially distant core-collapse events or help establish a correlation with globular clusters for other classes of peculiar explosions.

Notes

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2013 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

ID: 10327481