A1 Refereed original research article in a scientific journal

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




AuthorsBarna Barnabás, Szalai Tamás, Jha Saurabh W, Camacho-Neves Yssavo, Kwok Lindsey, Foley Ryan J, Kilpatrick Charles D, Coulter David A, Dimitriadis Georgios, Rest Armin, Rojas-Bravo César, Siebert Matthew R, Brown Peter J, Burke Jamison, Gonzalez Estefania Padilla, Hiramatsu Daichi, Howell D Andrew, McCully Curtis, Pellegrino Craig, Dobson Matthew, Smartt Stephen J, Swift Jonathan J, Stacey Holland, Rahman Mohammed, Sand David J, Andrews Jennifer, Wyatt Samuel, Hsiao Eric Y, Anderson Joseph P, Chen Ting-Wan, Della Valle Massimo, Galbany Lluís, Gromadzki Mariusz, Inserra Cosimo, Lyman Joe, Magee Mark, Maguire Kate, Müller-Bravo Tomás E, Nicholl Matt, Srivastav Shubham, Williams Steven C

PublisherOXFORD UNIV PRESS

Publication year2021

JournalMonthly Notices of the Royal Astronomical Society

Journal name in sourceMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Journal acronymMON NOT R ASTRON SOC

Volume501

Issue1

First page 1078

Last page1099

Number of pages22

ISSN0035-8711

eISSN1365-2966

DOIhttps://doi.org/10.1093/mnras/staa3543

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/53329872


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 similar to 5 d before maximum light [t(max)(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 x 10(42) erg s(-1) and indicates that only 0.031 M-circle dot of Ni-56 was produced, making SN 2019muj a moderate luminosity object in the Iax class with peak absolute magnitude of M-V = -16.4 mag. The estimated date of explosion is t(0) = 58698.2 MJD and implies a short rise time of t(rise) = 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.

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Last updated on 2024-26-11 at 18:37