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

Journal Article · · The Astrophysical Journal (Online)
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)

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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1457006
Journal Information:
The Astrophysical Journal (Online), Vol. 858, Issue 1; Related Information: © 2018. The American Astronomical Society. All rights reserved.; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (16)

High-precision stellar abundances of the elements: methods and applications journal October 2018
Observational properties of thermonuclear supernovae journal August 2019
Models and Simulations for the Photometric LSST Astronomical Time Series Classification Challenge (PLAsTiCC) journal July 2019
A consistent estimate for gravitational wave and electromagnetic transient rates journal October 2018
Neutron star–white dwarf mergers: early evolution, physical properties, and outcomes journal January 2019
The volumetric rate of normal type Ia supernovae in the local Universe discovered by the Palomar Transient Factory journal March 2019
Tidal Disruption Events and Gravitational Waves from Intermediate-mass Black Holes in Evolving Globular Clusters across Space and Time journal November 2018
Toward Rate Estimation for Transient Surveys. I. Assessing Transient Detectability and Volume Sensitivity for iPTF journal August 2019
The Progenitors of Calcium-strong Transients journal December 2019
Stellar Binaries Incident on Supermassive Black Hole Binaries: Implications for Double Tidal Disruption Events, Calcium-rich Transients, and Hypervelocity Stars journal August 2018
Models and simulations for the photometric lsst astronomical time series classification challenge (Plasticc) text January 2019
Tidal Disruption Events and Gravitational Waves from Intermediate-mass Black Holes in Evolving Globular Clusters Across Space and Time text January 2018
High-precision stellar abundances of the elements - methods and applications text January 2018
Towards Rate Estimation for Transient Surveys I: Assessing Transient Detectability and Volume Sensitivity for iPTF text January 2019
White dwarf bounds on charged massive particles journal June 2020
Observational Properties of Thermonuclear Supernovae text January 2019

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