Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 501, Issue 1, Pages 1078-1099Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa3543
Keywords
supernovae: general; supernovae: individual: SN 2019muj (ASASSN-19tr)
Categories
Funding
- European Organisation for Astronomical Research in the Southern hemisphere, Chile as part of PESSTO (the Public ESO Spectroscopic Survey for Transient Objects Survey) ESO program [1103.D-0328]
- NASA [NN12AR55G, 80NSSC18K0284, 80NSSC18K1575, 80NSSC19K1639]
- Czech Science Foundation [1915480S]
- National Research, Development and Innovation Office (NKFIH), Hungary - European Union [GINOP-23-2-15-2016-00033]
- NKFIH/OTKA grant [FK-134432]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences
- New National Excellence Program of the Ministry of Technology and Innovation of Hungary [UNKP20-5]
- NSF award [AST-1615455]
- European Union [839090]
- NSF [AST1911225, AST-1821967, 1821987, 1813708, 1813466, 1908972, AST-1518052]
- Heising-Simons Foundation [2020-1864]
- Royal Astronomical Society Research Fellowship
- EU [842471]
- ERC [758638]
- STFC [ST/P000312/1, ST/P000495/1]
- Spanish grant within the European Funds for Regional Development (FEDER) [PGC2018-095317-B-C21]
- CONICYT PFCHA/DOCTORADOBECAS CHILE [2017-72180113]
- Polish NCN MAESTRO grant [2014/14/A/ST9/00121]
- National Science Foundation [1842400, DGE1339067.]
- NASA/Swift grant [80NSSC19K1386]
- Gordon and Betty Moore Foundation
- Heising-Simons Foundation
- David and Lucile Packard Foundation
- Google Summer of Code initiative
- European Space Agency's Summer of Code in Space program
- [RVO:67985815]
- STFC [ST/T000406/1] Funding Source: UKRI
Ask authors/readers for more resources
The early-time observations of SN 2019muj provide insight into the physical properties of the ejecta and the chemical abundance structure, as well as the estimated date of explosion. By fitting spectroscopic data with synthetic spectra, a connection between SN 2019muj and brighter SNe Iax can be established, highlighting its unique characteristics.
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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