SN 2020acat: an energetic fast rising Type IIb supernova
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
SN 2020acat : an energetic fast rising Type IIb supernova. / Medler, K.; Mazzali, P. A.; Teffs, J.; Ashall, C.; Anderson, J. P.; Arcavi, Iair; Benetti, S.; Bostroem, K. A.; Burke, J.; Cai, Y-z; Charalampopoulos, P.; Elias-Rosa, N.; Ergon, M.; Galbany, L.; Gromadzki, M.; Hiramatsu, D.; Howell, D. A.; Inserra, C.; Lundqvist, P.; McCully, C.; Muller-Bravo, T.; Newsome, M.; Nicholl, M.; Padilla Gonzalez, E.; Paraskeva, E.; Pastorello, A.; Pellegrino, C.; Pessi, P. J.; Reguitti, A.; Reynolds, T. M.; Roy, R.; Terreran, G.; Tomasella, L.; Young, D. R.
In: Monthly Notices of the Royal Astronomical Society, Vol. 513, No. 4, 27.05.2022, p. 5540-5558.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - SN 2020acat
T2 - an energetic fast rising Type IIb supernova
AU - Medler, K.
AU - Mazzali, P. A.
AU - Teffs, J.
AU - Ashall, C.
AU - Anderson, J. P.
AU - Arcavi, Iair
AU - Benetti, S.
AU - Bostroem, K. A.
AU - Burke, J.
AU - Cai, Y-z
AU - Charalampopoulos, P.
AU - Elias-Rosa, N.
AU - Ergon, M.
AU - Galbany, L.
AU - Gromadzki, M.
AU - Hiramatsu, D.
AU - Howell, D. A.
AU - Inserra, C.
AU - Lundqvist, P.
AU - McCully, C.
AU - Muller-Bravo, T.
AU - Newsome, M.
AU - Nicholl, M.
AU - Padilla Gonzalez, E.
AU - Paraskeva, E.
AU - Pastorello, A.
AU - Pellegrino, C.
AU - Pessi, P. J.
AU - Reguitti, A.
AU - Reynolds, T. M.
AU - Roy, R.
AU - Terreran, G.
AU - Tomasella, L.
AU - Young, D. R.
PY - 2022/5/27
Y1 - 2022/5/27
N2 - The ultraviolet (UV) and near-infrared (NIR) photometric and optical spectroscopic observations of SN 2020acat covering similar to 250 d after explosion are presented here. Using the fast rising photometric observations, spanning from the UV to NIR wavelengths, a pseudo-bolometric light curve was constructed and compared to several other well-observed Type lib supernovae (SNe lib). SN 2020acat displayed a very short rise time reaching a peak luminosity of Log(10) (L) = 42.49 +/- 0.17 erg s(-1) in only -14.6 +/- 0.3 d. From modelling of the pseudo-bolometric light curve, we estimated a total mass of Ni-56 synthesized by SN 2020acat of M-Ni = 0.13 +/- 0.03 M-circle dot, with an ejecta mass of M-circle dot = 2.3 +/- 0.4 M-circle dot and a kinetic energy of E-k = 1.2 +/- 0.3 x 10(51) erg. The optical spectra of SN 2020acat display hydrogen signatures well into the transitional period (greater than or similar to 100 d), between the photospheric and the nebular phases. The spectra also display a strong feature around 4900 angstrom that cannot be solely accounted for by the presence of the Fe II 5018 line. We suggest that the Fell feature was augmented by He I 5016 and possibly by the presence of N II 5005. From both photometric and spectroscopic analysis, we inferred that the progenitor of SN 2020acat was an intermediate-mass compact star with an M(ZAMS )of 15-20 M-circle dot.
AB - The ultraviolet (UV) and near-infrared (NIR) photometric and optical spectroscopic observations of SN 2020acat covering similar to 250 d after explosion are presented here. Using the fast rising photometric observations, spanning from the UV to NIR wavelengths, a pseudo-bolometric light curve was constructed and compared to several other well-observed Type lib supernovae (SNe lib). SN 2020acat displayed a very short rise time reaching a peak luminosity of Log(10) (L) = 42.49 +/- 0.17 erg s(-1) in only -14.6 +/- 0.3 d. From modelling of the pseudo-bolometric light curve, we estimated a total mass of Ni-56 synthesized by SN 2020acat of M-Ni = 0.13 +/- 0.03 M-circle dot, with an ejecta mass of M-circle dot = 2.3 +/- 0.4 M-circle dot and a kinetic energy of E-k = 1.2 +/- 0.3 x 10(51) erg. The optical spectra of SN 2020acat display hydrogen signatures well into the transitional period (greater than or similar to 100 d), between the photospheric and the nebular phases. The spectra also display a strong feature around 4900 angstrom that cannot be solely accounted for by the presence of the Fe II 5018 line. We suggest that the Fell feature was augmented by He I 5016 and possibly by the presence of N II 5005. From both photometric and spectroscopic analysis, we inferred that the progenitor of SN 2020acat was an intermediate-mass compact star with an M(ZAMS )of 15-20 M-circle dot.
KW - supernovae: general
KW - supernovae: individual: SN 2020acat
KW - BOLOMETRIC LIGHT CURVES
KW - COMPACT PROGENITOR
KW - UBVRI PHOTOMETRY
KW - SN-1993J
KW - SPECTRA
KW - TELESCOPE
KW - EVOLUTION
KW - DISTANCE
KW - M81
KW - CONSTRAINTS
U2 - 10.1093/mnras/stac1192
DO - 10.1093/mnras/stac1192
M3 - Journal article
VL - 513
SP - 5540
EP - 5558
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 315538958