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Title: The Volumetric Rate of Calcium-rich Transients in the Local Universe

Abstract

Here, we present a measurement of the volumetric rate of "calcium-rich" optical transients in the local universe, using a sample of three events from the Palomar Transient Factory (PTF). This measurement builds on a detailed study of the PTF transient detection efficiencies and uses a Monte Carlo simulation of the PTF survey. We measure the volumetric rate of calcium-rich transients to be higher than previous estimates: 1.21 -0.39 +1.13 10 -5 events yr -1Mpc -3. This is equivalent to 33%-94% of the local volumetric Type Ia supernova rate. This calcium-rich transient rate is sufficient to reproduce the observed calcium abundances in galaxy clusters, assuming an asymptotic calcium yield per calcium-rich event of ~0.05 M . As a result, we also study the PTF detection efficiency of these transients as a function of position within their candidate host galaxies. We confirm as a real physical effect previous results that suggest that calcium-rich transients prefer large physical offsets from their host galaxies.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Univ. of Southampton, Southampton (United Kingdom); Univ. of Portsmouth, Portsmouth (United Kingdom)
  2. Univ. of Southampton, Southampton (United Kingdom)
  3. Queen's Univ. Belfast, Belfast (United Kingdom)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
1457006
Grant/Contract Number:  
[AC02-05CH11231]
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
[Journal Name: The Astrophysical Journal (Online); Journal Volume: 858; Journal Issue: 1; Related Information: © 2018. The American Astronomical Society. All rights reserved.]; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: clusters: general; galaxies: clusters: intracluster medium; supernovae: general

Citation Formats

Frohmaier, Chris, Sullivan, Mark, Maguire, Kate, and Nugent, Peter. The Volumetric Rate of Calcium-rich Transients in the Local Universe. United States: N. p., 2018. Web. doi:10.3847/1538-4357/aabc0b.
Frohmaier, Chris, Sullivan, Mark, Maguire, Kate, & Nugent, Peter. The Volumetric Rate of Calcium-rich Transients in the Local Universe. United States. doi:10.3847/1538-4357/aabc0b.
Frohmaier, Chris, Sullivan, Mark, Maguire, Kate, and Nugent, Peter. Fri . "The Volumetric Rate of Calcium-rich Transients in the Local Universe". United States. doi:10.3847/1538-4357/aabc0b. https://www.osti.gov/servlets/purl/1457006.
@article{osti_1457006,
title = {The Volumetric Rate of Calcium-rich Transients in the Local Universe},
author = {Frohmaier, Chris and Sullivan, Mark and Maguire, Kate and Nugent, Peter},
abstractNote = {Here, we present a measurement of the volumetric rate of "calcium-rich" optical transients in the local universe, using a sample of three events from the Palomar Transient Factory (PTF). This measurement builds on a detailed study of the PTF transient detection efficiencies and uses a Monte Carlo simulation of the PTF survey. We measure the volumetric rate of calcium-rich transients to be higher than previous estimates: 1.21-0.39+1.13 10-5 events yr-1Mpc-3. This is equivalent to 33%-94% of the local volumetric Type Ia supernova rate. This calcium-rich transient rate is sufficient to reproduce the observed calcium abundances in galaxy clusters, assuming an asymptotic calcium yield per calcium-rich event of ~0.05 M⊙. As a result, we also study the PTF detection efficiency of these transients as a function of position within their candidate host galaxies. We confirm as a real physical effect previous results that suggest that calcium-rich transients prefer large physical offsets from their host galaxies.},
doi = {10.3847/1538-4357/aabc0b},
journal = {The Astrophysical Journal (Online)},
number = [1],
volume = [858],
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: The three calcium-rich transients entering our sample, and their positions on the sky. Top left: The three light curves in apparent magnitude space, together with the Bazin et al. (2009) functional fits over-plotted. The other three panels show the PTF survey area considered in each year: 2010 (uppermore » right), 2011 (lower left), and 2012 (lower right). In each panel, the simulated areas are shown as green boxes, and the position of the calcium-rich transients as crosses. The color-coding shows the fraction of simulated events that passed the coverage cuts.« less

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