The Most Rapidly Declining Type i Supernova 2019bkc/ATLAS19dqr

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. D. Di Mille; N. Elias-Rosa; K. Decker French; Thomas W.S. Holoien; Seppo Mattila; B. J. Shappee; Antony A. Stark; Samuel J. Swihart

doi:10.3847/2041-8213/ab62a4

The Most Rapidly Declining Type i Supernova 2019bkc/ATLAS19dqr

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. D. Di Mille, N. Elias-RosaK. Decker French, Thomas W.S. Holoien, Seppo Mattila, B. J. Shappee, Antony A. Stark, Samuel J. Swihart

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Abstract

We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- A nd r-band decline between peak and 10 days post peak of ALT="${\rm{\Delta }}{m} {10}(B)=5.24\pm 0.07$" SRC="apjlab62a4ieqn1.gif"/ mag and ALT="${\rm{\Delta }}{m} {10}(r)=3.85\pm 0.10$" SRC="apjlab62a4ieqn2.gif"/ 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.

Original language	English (US)
Article number	L6
Journal	Astrophysical Journal Letters
Volume	889
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ab62a4
State	Published - Jan 20 2020
Externally published	Yes

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/2041-8213/ab62a4

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Chen, P., Dong, S., Stritzinger, M. D., Holmbo, S., Strader, J., Kochanek, C. S., Peng, E. W., Benetti, S., Bersier, D., Brownsberger, S., Buckley, D. A. H., Gromadzki, M., Moran, S., Pastorello, A., Aydi, E., Bose, S., Connor, T., Boutsia, K., Di Mille, F. D., ... Swihart, S. J. (2020). The Most Rapidly Declining Type i Supernova 2019bkc/ATLAS19dqr. Astrophysical Journal Letters, 889(1), [L6]. https://doi.org/10.3847/2041-8213/ab62a4

The Most Rapidly Declining Type i Supernova 2019bkc/ATLAS19dqr. / Chen, Ping; Dong, Subo; Stritzinger, M. D.; Holmbo, Simon; Strader, Jay; Kochanek, C. S.; Peng, Eric W.; Benetti, S.; Bersier, D.; Brownsberger, Sasha; Buckley, David A.H.; Gromadzki, Mariusz; Moran, Shane; Pastorello, A.; Aydi, Elias; Bose, Subhash; Connor, Thomas; Boutsia, K.; Di Mille, F. D.; Elias-Rosa, N.; French, K. Decker; Holoien, Thomas W.S.; Mattila, Seppo; Shappee, B. J.; Stark, Antony A.; Swihart, Samuel J.

In: Astrophysical Journal Letters, Vol. 889, No. 1, L6, 20.01.2020.

Research output: Contribution to journal › Article › peer-review

Chen, P, Dong, S, Stritzinger, MD, Holmbo, S, Strader, J, Kochanek, CS, Peng, EW, Benetti, S, Bersier, D, Brownsberger, S, Buckley, DAH, Gromadzki, M, Moran, S, Pastorello, A, Aydi, E, Bose, S, Connor, T, Boutsia, K, Di Mille, FD, Elias-Rosa, N, French, KD, Holoien, TWS, Mattila, S, Shappee, BJ, Stark, AA & Swihart, SJ 2020, 'The Most Rapidly Declining Type i Supernova 2019bkc/ATLAS19dqr', Astrophysical Journal Letters, vol. 889, no. 1, L6. https://doi.org/10.3847/2041-8213/ab62a4

Chen, Ping ; Dong, Subo ; Stritzinger, M. D. ; Holmbo, Simon ; Strader, Jay ; Kochanek, C. S. ; Peng, Eric W. ; Benetti, S. ; Bersier, D. ; Brownsberger, Sasha ; Buckley, David A.H. ; Gromadzki, Mariusz ; Moran, Shane ; Pastorello, A. ; Aydi, Elias ; Bose, Subhash ; Connor, Thomas ; Boutsia, K. ; Di Mille, F. D. ; Elias-Rosa, N. ; French, K. Decker ; Holoien, Thomas W.S. ; Mattila, Seppo ; Shappee, B. J. ; Stark, Antony A. ; Swihart, Samuel J. / The Most Rapidly Declining Type i Supernova 2019bkc/ATLAS19dqr. In: Astrophysical Journal Letters. 2020 ; Vol. 889, No. 1.

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abstract = "We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- A nd r-band decline between peak and 10 days post peak of ALT={"}${\rm{\Delta }}{m} {10}(B)=5.24\pm 0.07${"} SRC={"}apjlab62a4ieqn1.gif{"}/ mag and ALT={"}${\rm{\Delta }}{m} {10}(r)=3.85\pm 0.10${"} SRC={"}apjlab62a4ieqn2.gif{"}/ 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.",

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AU - Chen, Ping

AU - Dong, Subo

AU - Stritzinger, M. D.

AU - Holmbo, Simon

AU - Strader, Jay

AU - Kochanek, C. S.

AU - Peng, Eric W.

AU - Benetti, S.

AU - Bersier, D.

AU - Brownsberger, Sasha

AU - Buckley, David A.H.

AU - Gromadzki, Mariusz

AU - Moran, Shane

AU - Pastorello, A.

AU - Aydi, Elias

AU - Bose, Subhash

AU - Connor, Thomas

AU - Boutsia, K.

AU - Di Mille, F. D.

AU - Elias-Rosa, N.

AU - French, K. Decker

AU - Holoien, Thomas W.S.

AU - Mattila, Seppo

AU - Shappee, B. J.

AU - Stark, Antony A.

AU - Swihart, Samuel J.

PY - 2020/1/20

Y1 - 2020/1/20

N2 - We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- A nd r-band decline between peak and 10 days post peak of ALT="${\rm{\Delta }}{m} {10}(B)=5.24\pm 0.07$" SRC="apjlab62a4ieqn1.gif"/ mag and ALT="${\rm{\Delta }}{m} {10}(r)=3.85\pm 0.10$" SRC="apjlab62a4ieqn2.gif"/ 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.

AB - We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- A nd r-band decline between peak and 10 days post peak of ALT="${\rm{\Delta }}{m} {10}(B)=5.24\pm 0.07$" SRC="apjlab62a4ieqn1.gif"/ mag and ALT="${\rm{\Delta }}{m} {10}(r)=3.85\pm 0.10$" SRC="apjlab62a4ieqn2.gif"/ 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.

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The Most Rapidly Declining Type i Supernova 2019bkc/ATLAS19dqr

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