SN 2020cpg: an energetic link between Type IIb and Ib supernovae. Issue 2 (22nd June 2021)
- Record Type:
- Journal Article
- Title:
- SN 2020cpg: an energetic link between Type IIb and Ib supernovae. Issue 2 (22nd June 2021)
- Main Title:
- SN 2020cpg: an energetic link between Type IIb and Ib supernovae
- Authors:
- Medler, K
Mazzali, P A
Teffs, J
Prentice, S J
Ashall, C
Amenouche, M
Anderson, J P
Burke, J
Chen, T W
Galbany, L
Gromadzki, M
Gutiérrez, C P
Hiramatsu, D
Howell, D A
Inserra, C
Kankare, E
McCully, C
Müller-Bravo, T E
Nicholl, M
Pellegrino, C
Sollerman, J - Abstract:
- ABSTRACT: Stripped-envelope supernovae (SE-SNe) show a wide variety of photometric and spectroscopic properties. This is due to the different potential formation channels and the stripping mechanism that allows for a large diversity within the progenitors outer envelope compositions. Here, the photometric and spectroscopic observations of SN 2020cpg covering ∼130 d from the explosion date are presented. SN 2020cpg ( z = 0.037) is a bright SE-SNe with the B -band peaking at MB = −17.75 ± 0.39 mag and a maximum pseudo-bolometric luminosity of L max = 6.03 ± 0.01 × 10 42 erg s −1 . Spectroscopically, SN 2020cpg displays a weak high- and low-velocity H α feature during the photospheric phase of its evolution, suggesting that it contained a detached hydrogen envelope prior to explosion. From comparisons with spectral models, the mass of hydrogen within the outer envelope was constrained to be ∼0.1 M⊙ . From the pseudo-bolometric light curve of SN 2020cpg a 56 Ni mass of M Ni ∼ 0.27 ± 0.08 M⊙ was determined using an Arnett-like model. The ejecta mass and kinetic energy of SN 2020cpg were determined using an alternative method that compares the light curve of SN 2020cpg and several modelled SE-SNe, resulting in an ejecta mass of M ejc ∼ 5.5 ± 2.0 M⊙ and a kinetic energy of E K ∼ 9.0 ± 3.0 × 10 51 erg. The ejected mass indicates a progenitor mass of 18−25 M⊙ . The use of the comparative light curve method provides an alternative process to the commonly used Arnett-like model toABSTRACT: Stripped-envelope supernovae (SE-SNe) show a wide variety of photometric and spectroscopic properties. This is due to the different potential formation channels and the stripping mechanism that allows for a large diversity within the progenitors outer envelope compositions. Here, the photometric and spectroscopic observations of SN 2020cpg covering ∼130 d from the explosion date are presented. SN 2020cpg ( z = 0.037) is a bright SE-SNe with the B -band peaking at MB = −17.75 ± 0.39 mag and a maximum pseudo-bolometric luminosity of L max = 6.03 ± 0.01 × 10 42 erg s −1 . Spectroscopically, SN 2020cpg displays a weak high- and low-velocity H α feature during the photospheric phase of its evolution, suggesting that it contained a detached hydrogen envelope prior to explosion. From comparisons with spectral models, the mass of hydrogen within the outer envelope was constrained to be ∼0.1 M⊙ . From the pseudo-bolometric light curve of SN 2020cpg a 56 Ni mass of M Ni ∼ 0.27 ± 0.08 M⊙ was determined using an Arnett-like model. The ejecta mass and kinetic energy of SN 2020cpg were determined using an alternative method that compares the light curve of SN 2020cpg and several modelled SE-SNe, resulting in an ejecta mass of M ejc ∼ 5.5 ± 2.0 M⊙ and a kinetic energy of E K ∼ 9.0 ± 3.0 × 10 51 erg. The ejected mass indicates a progenitor mass of 18−25 M⊙ . The use of the comparative light curve method provides an alternative process to the commonly used Arnett-like model to determine the physical properties of SE-SNe. … (more)
- Is Part Of:
- Monthly notices of the Royal Astronomical Society. Volume 506:Issue 2(2021)
- Journal:
- Monthly notices of the Royal Astronomical Society
- Issue:
- Volume 506:Issue 2(2021)
- Issue Display:
- Volume 506, Issue 2 (2021)
- Year:
- 2021
- Volume:
- 506
- Issue:
- 2
- Issue Sort Value:
- 2021-0506-0002-0000
- Page Start:
- 1832
- Page End:
- 1849
- Publication Date:
- 2021-06-22
- Subjects:
- supernovae: general -- supernovae: individual (SN 2020cpg)
Astronomy -- Periodicals
Periodicals
520.5 - Journal URLs:
- http://mnras.oxfordjournals.org/ ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966 ↗
http://www.blackwell-synergy.com/issuelist.asp?journal=mnr ↗
http://www.blackwell-synergy.com/loi/mnr ↗
http://ukcatalogue.oup.com/ ↗ - DOI:
- 10.1093/mnras/stab1761 ↗
- Languages:
- English
- ISSNs:
- 0035-8711
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5943.000000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 25437.xml