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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31451
Title: The Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr
Authors: Chen, Ping
Dong, Subo
Stritzinger, M. D.
Holmbo, Simon
Strader, Jay
Kochanek, C. S.
Peng, Eric W.
BENETTI, Stefano 
Bersier, D.
Brownsberger, Sasha
Buckley, David A. H.
Gromadzki, Mariusz
Moran, Shane
PASTORELLO, Andrea 
Aydi, Elias
Bose, Subhash
Connor, Thomas
Boutsia, K.
Di Mille, F.
ELIAS DE LA ROSA, NANCY DEL CARMEN 
French, K. Decker
Holoien, Thomas W. -S.
Mattila, Seppo
Shappee, B. J.
Stark, Antony A.
Swihart, Samuel J.
Issue Date: 2020
Journal: THE ASTROPHYSICAL JOURNAL LETTERS 
Number: 889
Issue: 1
First Page: L6
Abstract: 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 ${\rm{\Delta }}{m}_{10}(B)=5.24\pm 0.07$ mag and ${\rm{\Delta }}{m}_{10}(r)=3.85\pm 0.10$ 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.
URI: http://hdl.handle.net/20.500.12386/31451
URL: https://iopscience.iop.org/article/10.3847/2041-8213/ab62a4
https://arxiv.org/pdf/1905.02205.pdf
ISSN: 2041-8205
DOI: 10.3847/2041-8213/ab62a4
Bibcode ADS: 2020ApJ...889L...6C
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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