Publication:
SN 2018hna: 1987A-like Supernova with a Signature of Shock Breakout

Файлы
W2969911235.pdf(3.77 MB)
Дата
2019
Авторы
Singh, Avinash
Sahu, D. K.
Anupama, G. C.
Kumar, Brajesh
Baklanov, Petr V.
Journal Title
Journal ISSN
Volume Title
Издатель
Научные группы
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
High-cadence ultraviolet, optical, and near-infrared photometric and low-resolution spectroscopic observations of the peculiar Type II supernova (SN) 2018hna are presented. The early-phase multiband light curves (LCs) exhibit the adiabatic cooling envelope emission following the shock breakout up to similar to 14 days from the explosion. SN. 2018hna has a rise time of similar to 88 days in the V band, similar to SN 1987A. A Ni-56 mass of similar to 0.087 +/- 0.004 M-circle dot is inferred for SN 2018hna from its bolometric LC. Hydrodynamical modeling of the cooling phase suggests a progenitor with a radius similar to 50 R-circle dot, a mass of similar to 14-20 M-circle dot, and an explosion energy of similar to 1.7-2.9 x 10(51) erg. The smaller inferred radius of the progenitor than a standard red supergiant is indicative of a blue supergiant progenitor of SN 2018hna. A subsolar metallicity (similar to 0.3 Z(circle dot)) is inferred for the host galaxy UGC 07534, concurrent with the low-metallicity environments of 1987A-like events.
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Цитирование
SN 2018hna: 1987A-like Supernova with a Signature of Shock Breakout / Singh, Avinash [et al.] // Astrophysical Journal Letters. - 2019. - 882. - № 2. - 10.3847/2041-8213/ab3d44
URI
https://www.doi.org/10.3847/2041-8213/ab3d44
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85073004770&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000484762500001
 https://openrepository.mephi.ru/handle/123456789/18678
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