A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
The Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr
Tekijät: Ping Chen, Subo Dong, M. D. Stritzinger, Simon Holmbo, Jay Strader, C. S. Kochanek, Eric W. Peng, S. Benetti, D. Bersier, Sasha Brownsberger, David A. H. Buckley, Mariusz Gromadzki, Shane Moran, A. Pastorello, Elias Aydi, Subhash Bose, Thomas Connor, K. Boutsia, F. Di Mille, N. Elias-Rosa, K. Decker French, Thomas W.-S. Holoien, Seppo Mattila, B. J. Shappee, Antony A. Stark, Samuel J. Swihart
Kustantaja: IOP PUBLISHING LTD
Julkaisuvuosi: 2020
Journal: Astrophysical Journal Letters
Tietokannassa oleva lehden nimi: ASTROPHYSICAL JOURNAL LETTERS
Lehden akronyymi: ASTROPHYS J LETT
Artikkelin numero: ARTN L6
Vuosikerta: 889
Numero: 1
Sivujen määrä: 17
ISSN: 2041-8205
DOI: https://doi.org/10.3847/2041-8213/ab62a4
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/46861022
We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- and r-band decline between peak and 10 days post peak of Dm10 (B) = 5.24. 0.07 mag and Dm10 (r) = 3.85. 0.10 mag, respectively, SN.2019bkc is the most rapidly declining SN I discovered so far. While its closest matches are the rapidly declining SN.2005ek and SN. 2010X, the light curves and spectra of SN.2019bkc show some unprecedented characteristics. SN.2019bkc appears "hostless," with no identifiable host galaxy near its location, although it may be associated with the galaxy cluster MKW1 at z.=.0.02. We evaluate a number of existing models of fast-evolving SNe, and we find that none of them can satisfactorily explain all aspects of SN.2019bkc observations.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
