SN 2020acat: an energetic fast rising Type IIb supernova-Reference-Cited by-同舟云学术

SN 2020acat: an energetic fast rising Type IIb supernova

Published:2022-05-05 Issue:4 Volume:513 Page:5540-5558
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Medler K¹^ORCID,Mazzali P A¹²,Teffs J¹^ORCID,Ashall C³^ORCID,Anderson J P⁴,Arcavi I⁵⁶,Benetti S⁷^ORCID,Bostroem K A⁸^ORCID,Burke J⁹¹⁰,Cai Y-Z¹¹,Charalampopoulos P¹²,Elias-Rosa N⁷¹³,Ergon M¹⁴¹⁵,Galbany L¹³¹⁶^ORCID,Gromadzki M¹⁷^ORCID,Hiramatsu D¹⁸¹⁹,Howell D A⁹¹⁰,Inserra C²⁰^ORCID,Lundqvist P¹⁴¹⁵^ORCID,McCully C⁹¹⁰,Müller-Bravo T¹³^ORCID,Newsome M⁹¹⁰,Nicholl M²¹,Padilla Gonzalez E⁹¹⁰,Paraskeva E²²²³,Pastorello A⁷,Pellegrino C⁹¹⁰,Pessi P J²⁴,Reguitti A⁷²⁵²⁶^ORCID,Reynolds T M²⁷^ORCID,Roy R²⁸,Terreran G⁹¹⁰,Tomasella L⁷^ORCID,Young D R²⁹

Affiliation:

1. Astrophysical Research Institute Liverpool John Moores University , Liverpool L3 5RF, UK

2. Max-Planck Institute for Astrophysics , Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany

3. Institute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA

4. European Southern Observatory , Alonso de Córdova 3107, Casilla 19, Santiago, Chile

5. The School of Physics and Astronomy, Tel Aviv University , Tel Aviv 69978, Israel

6. CIFAR Azrieli Global Scholars program , CIFAR, Toronto, ON M5G 1M1, Canada

7. INAF – Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, I-35122 Padova, Italy

8. DIRAC Institute, Department of Astronomy, University of Washington , 3910 15th Avenue NE, Seattle, WA 98195, USA

9. Las Cumbres Observatory , 6740 Cortona Dr, Suite 102, Goleta, CA 93117-5575, USA

10. Department of Physics, University of California , Santa Barbara, CA 93106-9530, USA

11. Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University , Beijing 100084, China

12. DTU Space, National Space Institute, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark

13. Institute of Space Sciences (ICE, CSIC) , Campus UAB, Carrer de Can Magrans s/n, E-08193 Barcelona, Spain

14. Department of Astronomy, AlbaNova University Center , Stockholm University, SE-10691 Stockholm, Sweden

15. The Oskar Klein Centre , AlbaNova, SE-10691 Stockholm, Sweden

16. Institut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona, Spain

17. Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, PL-00-478 Warszawa, Poland

18. Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138-1516, USA

19. The NSF AI Institute for Artificial Intelligence and Fundamental Interactions , 77 Massachusetts Ave, 26-555. Cambridge, MA 02139, USA

20. Cardiff Hub for Astrophysics Research and Technology, School of Physics and Astronomy, Cardiff University , Queens Buildings, The Parade, Cardiff CF24 3AA, UK

21. Birmingham Institute for Gravitational Wave Astronomy and School of Physics and Astronomy, University of Birmingham , Birmingham B15 2TT, UK

22. IAASARS, Observatory of Athens , 15236 Penteli, Greece

23. Nordic Optical Telescope , Apartado 474, 38700 Santa Cruz de La Palma, Santa Cruz de Tenerife, Spain

24. Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata , Paseo del Bosque S/N, B1900FWA La Plata, Argentina

25. Departamento de Ciencias Físicas – Universidad Andres Bello , Avda. República 252, Santiago, Chile

26. Millennium Institute of Astrophysics , Nuncio Monsenor Sótero Sanz 100, Providencia, Santiago, Chile

27. The Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen , Rådmandsgade 62, DK-2200 København N, Denmark

28. Inter-University Centre for Astronomy and Astrophysics , Pune 411007, India

29. Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast , Belfast BT7 1NN, UK

Abstract

ABSTRACT The ultraviolet (UV) and near-infrared (NIR) photometric and optical spectroscopic observations of SN 2020acat covering ∼250 d after explosion are presented here. Using the fast rising photometric observations, spanning from the UV to NIR wavelengths, a pseudo-bolometric light curve was constructed and compared to several other well-observed Type IIb supernovae (SNe IIb). SN 2020acat displayed a very short rise time reaching a peak luminosity of $\mathrm{{\rm Log}_{10}}(L) = 42.49 \pm 0.17 \, \mathrm{erg \, s^{-1}}$ in only ∼14.6 ± 0.3 d. From modelling of the pseudo-bolometric light curve, we estimated a total mass of 56Ni synthesized by SN 2020acat of MNi = 0.13 ± 0.03 M⊙, with an ejecta mass of Mej = 2.3 ± 0.4 M⊙ and a kinetic energy of Ek = 1.2 ± 0.3 × 1051 erg. The optical spectra of SN 2020acat display hydrogen signatures well into the transitional period (≳ 100 d), between the photospheric and the nebular phases. The spectra also display a strong feature around 4900 Å that cannot be solely accounted for by the presence of the Fe ii 5018 line. We suggest that the Fe ii feature was augmented by He i 5016 and possibly by the presence of N ii 5005. From both photometric and spectroscopic analysis, we inferred that the progenitor of SN 2020acat was an intermediate-mass compact star with an MZAMS of 15–20 M⊙.

Funder

NASA

NSF

Ministerio de Ciencia e Innovación

Agencia Estatal de Investigación

CSIC

ANID

AEI

European Social Fund

European Research Council

Israel Science Foundation

BSF