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The GALEX-PTF experiment: II. supernova progenitor radius and energetics via shock-cooling modeling

Ganot, Noam and Ofek, Eran O. and Gal-Yam, Avishay and Soumagnac, Maayane T. and Morag, Jonathan and Waxman, Eli and Kulkarni, Shrinivas R. and Kasliwal, Mansi M. and Neill, James (2020) The GALEX-PTF experiment: II. supernova progenitor radius and energetics via shock-cooling modeling. . (Unpublished)

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The radius and surface composition of an exploding massive star, as well as the explosion energy per unit mass, can be measured using early ultraviolet (UV) observations of core-collapse supernovae (CC SNe). We present the results from a simultaneous \GALEX and Palomar Transient Factory (PTF) search for early UV emission from SNe. We analyze five CC SNe for which we obtained NUV measurements before the first ground-based R-band detection. We introduce SOPRANOS, a new maximum likelihood fitting tool for models with variable temporal validity windows, and use it to fit the Sapir & Waxman (2017) shock cooling model to the data. We report four Type II SNe with progenitor radii in the range of R_∗ ≈ 600−1100 R_⊙ and a shock velocity parameter in the range of v_(s∗) ≈ 2700−6000 km s⁻¹ (E/M ≈ 2−8 × 10⁵⁰ erg/M_⊙) and one type IIb SN with R_∗ ≈ 210 R_⊙ and v_(s∗) ≈ 11000 km s⁻¹ (E/M ≈ 1.8 × 10⁵¹ erg/M_⊙). Our pilot GALEX/PTF project thus suggests that a dedicated, systematic SN survey in the NUV band, such as the wide-field UV explorer ULTRASAT mission, is a compelling method to study the properties of SN progenitors and SN energetics.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Ofek, Eran O.0000-0002-6786-8774
Gal-Yam, Avishay0000-0002-3653-5598
Soumagnac, Maayane T.0000-0001-6753-1488
Waxman, Eli0000-0002-9038-5877
Kulkarni, Shrinivas R.0000-0001-5390-8563
Kasliwal, Mansi M.0000-0002-5619-4938
Neill, James0000-0002-0466-1119
Additional Information:We want to thank Barak Zackay for useful discussions leading to the development of SOPRANOS formalism. E.O.O. is grateful for the support by grants from the Israel Science Foundation, Minerva, Israeli Ministry of Technology and Science, the US-Israel Binational Science Foundation, Weizmann-UK, Weizmann-Yale, the Weizmann-Caltech grants, the Norman E. Alexander Family M. Foundation ULTRASAT Data Center Fund, Jonathan Beare, André Deloro Institute for Space and Optics Research, Schwartz/Reisman Collaborative Science Program and the Willner Family Leadership Institute for the Weizmann Institute of Science. AGY’s research is supported by the EU via ERC grant No. 725161, the ISF GW excellence center, an IMOS space infrastructure grant and BSF/Transformative and GIF grants, as well as The Benoziyo Endowment Fund for the Advancement of Science, the Deloro Institute for Advanced Research in Space and Optics, The Veronika A. Rabl Physics Discretionary Fund, Minerva, Yeda-Sela and the Schwartz/Reisman Collaborative Science Program; AGY is the recipient of the Helen and Martin Kimmel Award for Innovative Investigation. MMK acknowledges generous support from the David and Lucille Packard Foundation.
Group:Astronomy Department
Funding AgencyGrant Number
Israel Science FoundationUNSPECIFIED
Ministry of Science (Israel)UNSPECIFIED
Binational Science Foundation (USA-Israel)UNSPECIFIED
Norman E. Alexander Family M. FoundationUNSPECIFIED
Jonathan Beare,UNSPECIFIED
Deloro Institute for Advanced Research in Space and OpticsUNSPECIFIED
Schwartz/Reisman Collaborative Science ProgramUNSPECIFIED
Willner Family Leadership InstituteUNSPECIFIED
European Research Council (ERC)725161
Israel Science FoundationUNSPECIFIED
Veronika A. Rabl Physics Discretionary FundUNSPECIFIED
Helen and Martin Kimmel AwardUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Subject Keywords:supernovae: general; Astrophysics - High Energy Astrophysical Phenomena; Astrophysics - Cosmology and Nongalactic Astrophysics
Record Number:CaltechAUTHORS:20210204-092718925
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107907
Deposited By: George Porter
Deposited On:05 Feb 2021 20:48
Last Modified:05 Feb 2021 20:48

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