SN 2019muj – a well-observed Type Iax supernova that bridges the luminosity gap of the class-Reference-Cited by-同舟云学术

SN 2019muj – a well-observed Type Iax supernova that bridges the luminosity gap of the class

Published:2020-11-13 Issue:1 Volume:501 Page:1078-1099
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Barna Barnabás¹²^ORCID,Szalai Tamás²³,Jha Saurabh W⁴^ORCID,Camacho-Neves Yssavo⁴,Kwok Lindsey⁴,Foley Ryan J⁵,Kilpatrick Charles D⁵,Coulter David A⁵,Dimitriadis Georgios⁵,Rest Armin⁶⁷,Rojas-Bravo César⁵,Siebert Matthew R⁵,Brown Peter J⁸⁹,Burke Jamison¹⁰¹¹,Padilla Gonzalez Estefania¹⁰¹¹,Hiramatsu Daichi¹⁰¹¹,Howell D Andrew¹⁰¹¹,McCully Curtis¹⁰,Pellegrino Craig¹⁰¹¹,Dobson Matthew¹²,Smartt Stephen J¹²,Swift Jonathan J¹³,Stacey Holland¹³,Rahman Mohammed¹³,Sand David J¹⁴,Andrews Jennifer¹⁴,Wyatt Samuel¹⁴,Hsiao Eric Y¹⁵,Anderson Joseph P¹⁶,Chen Ting-Wan¹⁷,Della Valle Massimo¹⁸,Galbany Lluís¹⁹^ORCID,Gromadzki Mariusz²⁰,Inserra Cosimo²¹^ORCID,Lyman Joe²²^ORCID,Magee Mark²³,Maguire Kate²³^ORCID,Müller-Bravo Tomás E²⁴^ORCID,Nicholl Matt²⁵²⁶,Srivastav Shubham¹²,Williams Steven C²⁷²⁸^ORCID

Affiliation:

1. Astronomical Institute, Czech Academy of Science, Bocni II 1401, CZ-141 00 Prague, Czech Republic

2. Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, Szeged 6720, Hungary

3. Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary

4. Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854, USA

5. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA

6. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

7. Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA

8. Department of Physics and Astronomy, Texas A&M University, 4242 TAMU, College Station, TX 77843, USA

9. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics & Astronomy, 4242 TAMU, College Station, TX 77843, USA

10. Las Cumbres Observatory, 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA

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

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

13. Thacher Observatory, Thacher School, 5025 Thacher Rd., Ojai, CA 93023, USA

14. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA

15. Department of Physics, Florida State University, 77 Chieftan Way, Tallahassee, FL 32306, USA

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

17. The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-10691 Stockholm, Sweden

18. INAF – Capodimonte, Naples, Salita Moiariello 16, I-80131 Naples, Italy

19. Departamento de Física Teórica y del Cosmos, Universidad de Granada, E-18071 Granada, Spain

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

21. School of Physics & Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA, UK

22. Department of Physics, University of Warwick, Coventry CV4 7AL, UK

23. School of Physics, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland

24. School of Physics and Astronomy, University of Southampton, Southampton, Hampshire SO17 1BJ, UK

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

26. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill EH9 3HJ, UK

27. Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Quantum, Vesilinnantie 5, FI-20014 Turku, Finland

28. Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland

Abstract

ABSTRACT We present early-time (t < +50 d) observations of SN 2019muj (=ASASSN-19tr), one of the best-observed members of the peculiar SN Iax class. Ultraviolet and optical photometric and optical and near-infrared spectroscopic follow-up started from ∼5 d before maximum light [tmax(B) on $58707.8$ MJD] and covers the photospheric phase. The early observations allow us to estimate the physical properties of the ejecta and characterize the possible divergence from a uniform chemical abundance structure. The estimated bolometric light-curve peaks at 1.05 × 1042 erg s−1 and indicates that only 0.031 M⊙ of 56Ni was produced, making SN 2019muj a moderate luminosity object in the Iax class with peak absolute magnitude of $M_\rm {V} = -16.4$ mag. The estimated date of explosion is t0 = $58698.2$ MJD and implies a short rise time of trise = 9.6 d in B band. We fit of the spectroscopic data by synthetic spectra, calculated via the radiative transfer code tardis. Adopting the partially stratified abundance template based on brighter SNe Iax provides a good match with SN 2019muj. However, without earlier spectra, the need for stratification cannot be stated in most of the elements, except carbon, which is allowed to appear in the outer layers only. SN 2019muj provides a unique opportunity to link extremely low-luminosity SNe Iax to well-studied, brighter SNe Iax.

Funder

National Aeronautics and Space Administration

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/staa3543/34302119/staa3543.pdf

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