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Title: Pair-instability supernovae via collision runaway in young dense star clusters: PISNe via collision runaway

Journal Article · · Monthly Notices of the Royal Astronomical Society
 [1];  [1];  [2]
  1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Stars with helium cores between ~64 and 133 M are theoretically predicted to die as pair-instability supernovae. This requires very massive progenitors, which are theoretically prohibited for Pop II/I stars within the Galactic stellar mass limit due to mass-loss via line-driven winds. However, the runaway collision of stars in a dense, young star cluster could create a merged star with sufficient mass to end its life as a pair-instability supernova, even with enhanced mass-loss at non-zero metallicity. We show that the predicted rate from this mechanism is consistent with the inferred volumetric rate of roughly ~2 × 10-9 Mpc-3 yr-1 of the two observed pair-instability supernovae, SN 2007bi and PTF 10nmn, neither of which has metal-free host galaxies. Contrary to prior literature, only pair-instability supernovae at low redshifts $z < 2$ will be observable with the Large Synoptic Survey Telescope. We estimate that the telescope will observe ~102 such events per year that originate from the collisional runaway mergers in clusters.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of California, Oakland, CA (United States); Univ. of California, Santa Cruz, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231; FC02-06ER41438
OSTI ID:
1564900
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 423, Issue 3; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (12)

Explosion and nucleosynthesis of low-redshift pair-instability supernovae journal June 2014
CHEMICAL ENRICHMENT OF DAMPED Lyα SYSTEMS AS A DIRECT CONSTRAINT ON POPULATION III STAR FORMATION journal July 2013
Models and Simulations for the Photometric LSST Astronomical Time Series Classification Challenge (PLAsTiCC) journal July 2019
Radiative properties of pair-instability supernova explosions journal November 2012
Nebular spectra of pair-instability supernovae journal November 2015
Massive black hole binaries from runaway collisions: the impact of metallicity journal April 2016
A Superluminous Supernova in High Surface Density Molecular Gas within the Bar of a Metal-rich Galaxy journal August 2019
Models and simulations for the photometric lsst astronomical time series classification challenge (Plasticc) text January 2019
Explosion and nucleosynthesis of low redshift pair instability supernovae text January 2014
Nebular spectra of pair-instability supernovae text January 2015
Host-Galaxy Properties of 32 Low-Redshift Superluminous Supernovae from the Palomar Transient Factory text January 2016
A superluminous supernova in high surface density molecular gas within the bar of a metal-rich galaxy text January 2019

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