A Caltech Library Service

No velocity-kicks are required to explain large-distance offsets of Ca-rich supernovae and short-GRBs

Perets, Hagai B. and Beniamini, Paz (2021) No velocity-kicks are required to explain large-distance offsets of Ca-rich supernovae and short-GRBs. Monthly Notices of the Royal Astronomical Society, 503 (4). pp. 5997-6004. ISSN 0035-8711. doi:10.1093/mnras/stab794.

PDF - Published Version
See Usage Policy.

[img] PDF - Accepted Version
See Usage Policy.


Use this Persistent URL to link to this item:


Environments of supernovae (SNe) and gamma-ray bursts (GRBs) link their progenitors to the underlying stellar population, providing critical clues for their origins. However, various transients including Ca-rich SNe and short-GRBs, appear to be located at remote locations, far from the stellar population of their host galaxy, challenging our understanding of their origin and/or physical evolution. These findings instigated models suggesting that either large velocity-kicks were imparted to the transient progenitors, allowing them to propagate to large distances and attain their remote locations; or that they formed in dense globular-clusters residing in the haloes. Here we show that instead, large spatial-offsets of such transients are naturally explained by observations of highly extended stellar populations in (mostly early-type) galaxy haloes, typically missed since they can only be identified through ultra-deep/stacked images. Consequently, no large velocity kicks, nor halo globular–cluster environments are required in order to explain the origin of these transients. These findings support thermonuclear explosions on white-dwarfs, for the origins of Ca-rich SNe progenitors, and the existence of small (or zero) kick-velocities given to short-GRB progenitors. Furthermore, since stacked/ultra-deep imaging show that early-type galaxies are more extended than late-type galaxies, studies of transients’ offset-distribution (e.g. type Ia SNe or FRBs) should account for host galaxy-type. Since early-type galaxies contain older stellar populations, transient arising from older stellar populations would have larger fractions of early-type hosts, and consequently larger fractions of large-offset transients. In agreement with our results for short-GRBs and Ca-rich SNe showing different offset distributions in early versus late-type galaxies.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Perets, Hagai B.0000-0002-5004-199X
Beniamini, Paz0000-0001-7833-1043
Additional Information:© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2021 March 15. Received 2021 March 15; in original form 2021 January 26. Published: 19 March 2021. We would like to thank the referee for thoughtful and constructive comments that improved the manuscript. HBP acknowledges support for this project from the European Union’s Horizon 2020 research and innovation program under grant agreement No 865932-ERC-SNeX and the Kingsley distingushed visitor program at Caltech. The research of PB was funded by the Gordon and Betty Moore Foundation through Grant GBMF5076. Data Availability: The simulations underlying this article will be shared on reasonable request to the corresponding author.
Group:TAPIR, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
European Research Council (ERC)865932
Kingsley FoundationUNSPECIFIED
Gordon and Betty Moore FoundationGBMF5076
Subject Keywords:gamma-ray burst: general – stars: neutron – fast radio bursts – gamma-ray bursts – neutron star mergers – transients: supernovae
Issue or Number:4
Record Number:CaltechAUTHORS:20210611-142946656
Persistent URL:
Official Citation:Hagai B Perets, Paz Beniamini, No velocity-kicks are required to explain large-distance offsets of Ca-rich supernovae and short-GRBs, Monthly Notices of the Royal Astronomical Society, Volume 503, Issue 4, June 2021, Pages 5997–6004,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109487
Deposited By: Tony Diaz
Deposited On:11 Jun 2021 21:58
Last Modified:11 Jun 2021 21:58

Repository Staff Only: item control page