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SN 2020udy :
SN 2020udy : an SN Iax with strict limits on interaction consistent with a helium-star companion
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Maguire, Kate (author)
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Magee, Mark R. (author)
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Leloudas, Giorgos (author)
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Miller, Adam A. (author)
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Dimitriadis, Georgios (author)
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Pursiainen, Miika (author)
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Bulla, Mattia (author)
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De, Kishalay (author)
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Gal-Yam, Avishay (author)
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Perley, Daniel A. (author)
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Fremling, Christoffer (author)
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Karambelkar, Viraj R. (author)
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Nordin, Jakob (author)
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Reusch, Simeon (author)
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- Schulze, Steve (author)
- Stockholms universitet,Oskar Klein-centrum för kosmopartikelfysik (OKC),Fysikum
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- Sollerman, Jesper, 1968- (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Terreran, Giacomo (author)
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Yang, Yi (author)
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Bellm, Eric C. (author)
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Groom, Steven L. (author)
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Kasliwal, Mansi M. (author)
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Kulkarni, Shrinivas R. (author)
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- Lacroix, Leander (author)
- Stockholms universitet,Oskar Klein-centrum för kosmopartikelfysik (OKC),Fysikum
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Masci, Frank J. (author)
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Purdum, Josiah N. (author)
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Sharma, Yashvi (author)
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Smith, Roger (author)
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Monthly notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 525:1, s. 1210-1228
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Early observations of transient explosions can provide vital clues to their progenitor origins. In this paper, we present the nearby Type Iax (02cx-like) supernova (SN), SN 2020udy, that was discovered within hours (∼7 h) of estimated first light. An extensive data set of ultra-violet, optical, and near-infrared observations was obtained, covering out to ∼150 d after explosion. SN 2020udy peaked at −17.86 ± 0.43 mag in the r band and evolved similarly to other ‘luminous’ SNe Iax, such as SNe 2005hk and 2012Z. Its well-sampled early light curve allows strict limits on companion interaction to be placed. Main-sequence companion stars with masses of 2 and 6 M⊙ are ruled out at all viewing angles, while a helium-star companion is allowed from a narrow range of angles (140–180° away from the companion). The spectra and light curves of SN 2020udy are in good agreement with those of the ‘N5def’ deflagration model of a near Chandrasekhar-mass carbon–oxygen white dwarf. However, as has been seen in previous studies of similar luminosity events, SN 2020udy evolves slower than the model. Broad-band linear polarization measurements taken at and after peak are consistent with no polarization, in agreement with the predictions of the companion-star configuration from the early light-curve measurements. The host galaxy environment is low metallicity and is consistent with a young stellar population. Overall, we find the most plausible explosion scenario to be the incomplete disruption of a CO white dwarf near the Chandrasekhar-mass limit, with a helium-star companion.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- techniques: photometric
- techniques: polarimetric
- techniques: spectroscopic
- supernovae: general
- supernovae: individual: SN 2020udy
- white dwarfs
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Maguire, Kate
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Magee, Mark R.
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Leloudas, Giorgo ...
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Miller, Adam A.
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Dimitriadis, Geo ...
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Pursiainen, Miik ...
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show more...
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Bulla, Mattia
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De, Kishalay
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Gal-Yam, Avishay
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Perley, Daniel A ...
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Fremling, Christ ...
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Karambelkar, Vir ...
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Nordin, Jakob
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Reusch, Simeon
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Schulze, Steve
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Sollerman, Jespe ...
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Terreran, Giacom ...
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Yang, Yi
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Bellm, Eric C.
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Groom, Steven L.
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Kasliwal, Mansi ...
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Kulkarni, Shrini ...
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Lacroix, Leander
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Masci, Frank J.
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Purdum, Josiah N ...
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Sharma, Yashvi
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Smith, Roger
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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 ...
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and Astronomy Astrop ...
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Stockholm University