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SN2019dge :
SN2019dge : A Helium-rich Ultra-stripped Envelope Supernova
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Yao, Yuhan (author)
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De, Kishalay (author)
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Kasliwal, Mansi M. (author)
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Ho, Anna Y. Q. (author)
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Schulze, Steve (author)
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Li, Zhihui (author)
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Kulkarni, S. R. (author)
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Fruchter, Andrew (author)
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Rubin, David (author)
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Perley, Daniel A. (author)
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Fuller, Jim (author)
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Piro, Anthony L. (author)
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Fremling, C. (author)
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Bellm, Eric C. (author)
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Burruss, Rick (author)
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Duev, Dmitry A. (author)
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Feeney, Michael (author)
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Gal-Yam, Avishay (author)
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Golkhou, V. Zach (author)
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Graham, Matthew J. (author)
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Helou, George (author)
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Kupfer, Thomas (author)
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Laher, Russ R. (author)
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Masci, Frank J. (author)
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Miller, Adam A. (author)
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Rusholme, Ben (author)
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Shupe, David L. (author)
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Smith, Roger (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Soumagnac, Maayane T. (author)
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Zolkower, Jeffry (author)
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(creator_code:org_t)
- 2020-08-31
- 2020
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 900:1
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https://doi.org/10.3...
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https://iopscience.i...
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https://doi.org/10.3...
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Abstract
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- We present observations of ZTF18abfcmjw (SN2019dge), a helium-rich supernova with a fast-evolving light curve indicating an extremely low ejecta mass (approximate to 0.33M(circle dot)) and low kinetic energy (approximate to 1.3 x 10(50)erg). Early-time (<4 days after explosion) photometry reveals evidence of shock cooling from an extended helium-rich envelope of similar to 0.1 M-circle dot located similar to 1.2 x 10(13) cm from the progenitor. Early-time He II line emission and subsequent spectra show signatures of interaction with helium-rich circumstellar material, which extends from greater than or similar to 5 x 10(13)cm to greater than or similar to 2 x 10(16)cm. We interpret SN2019dge as a helium-rich supernova from an ultra-stripped progenitor, which originates from a close binary system consisting of a mass-losing helium star and a low-mass main-sequence star or a compact object (i.e., a white dwarf, a neutron star, or a black hole). We infer that the local volumetric birth rate of 19dge-like ultra-stripped SNe is in the range of 1400-8200 Gpc(-3)yr(-1) (i.e., 2%-12% of core-collapse supernova rate). This can be compared to the observed coalescence rate of compact neutron star binaries that are not formed by dynamical capture.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Yao, Yuhan
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De, Kishalay
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Kasliwal, Mansi ...
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Ho, Anna Y. Q.
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Schulze, Steve
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Li, Zhihui
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show more...
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Kulkarni, S. R.
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Fruchter, Andrew
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Rubin, David
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Perley, Daniel A ...
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Fuller, Jim
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Piro, Anthony L.
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Fremling, C.
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Bellm, Eric C.
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Burruss, Rick
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Duev, Dmitry A.
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Feeney, Michael
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Gal-Yam, Avishay
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Golkhou, V. Zach
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Graham, Matthew ...
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Helou, George
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Kupfer, Thomas
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Laher, Russ R.
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Masci, Frank J.
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Miller, Adam A.
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Rusholme, Ben
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Shupe, David L.
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Smith, Roger
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Sollerman, Jespe ...
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Soumagnac, Maaya ...
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Zolkower, Jeffry
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Stockholm University