Carnegie Supernova Project II - Staff at the Niels Bohr Institute

Carnegie Supernova Project II: The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Carnegie Supernova Project II : The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events. / Hsiao, E. Y.; Hoeflich, P.; Ashall, C.; Lu, J.; Contreras, C.; Burns, C. R.; Phillips, M. M.; Galbany, L.; Anderson, J. P.; Baltay, C.; Baron, E.; Castellón, S.; Davis, S.; Freedman, Wendy L.; Gall, C.; Gonzalez, C.; Graham, M. L.; Hamuy, M.; Holoien, T. W.S.; Karamehmetoglu, E.; Krisciunas, K.; Kumar, S.; Kuncarayakti, H.; Morrell, N.; Moriya, T. J.; Nugent, P. E.; Perlmutter, S.; Persson, S. E.; Piro, A. L.; Rabinowitz, D.; Roth, M.; Shahbandeh, M.; Shappee, B. J.; Stritzinger, M. D.; Suntzeff, N. B.; Taddia, F.; Uddin, S. A.

In: Astrophysical Journal, Vol. 900, No. 2, 140, 2020.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Hsiao, EY, Hoeflich, P, Ashall, C, Lu, J, Contreras, C, Burns, CR, Phillips, MM, Galbany, L, Anderson, JP, Baltay, C, Baron, E, Castellón, S, Davis, S, Freedman, WL, Gall, C, Gonzalez, C, Graham, ML, Hamuy, M, Holoien, TWS, Karamehmetoglu, E, Krisciunas, K, Kumar, S, Kuncarayakti, H, Morrell, N, Moriya, TJ, Nugent, PE, Perlmutter, S, Persson, SE, Piro, AL, Rabinowitz, D, Roth, M, Shahbandeh, M, Shappee, BJ, Stritzinger, MD, Suntzeff, NB, Taddia, F & Uddin, SA 2020, 'Carnegie Supernova Project II: The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events', Astrophysical Journal, vol. 900, no. 2, 140. https://doi.org/10.3847/1538-4357/abaf4c

APA

Hsiao, E. Y., Hoeflich, P., Ashall, C., Lu, J., Contreras, C., Burns, C. R., Phillips, M. M., Galbany, L., Anderson, J. P., Baltay, C., Baron, E., Castellón, S., Davis, S., Freedman, W. L., Gall, C., Gonzalez, C., Graham, M. L., Hamuy, M., Holoien, T. W. S., ... Uddin, S. A. (2020). Carnegie Supernova Project II: The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events. Astrophysical Journal, 900(2), [140]. https://doi.org/10.3847/1538-4357/abaf4c

Vancouver

Hsiao EY, Hoeflich P, Ashall C, Lu J, Contreras C, Burns CR et al. Carnegie Supernova Project II: The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events. Astrophysical Journal. 2020;900(2). 140. https://doi.org/10.3847/1538-4357/abaf4c

Author

Hsiao, E. Y. ; Hoeflich, P. ; Ashall, C. ; Lu, J. ; Contreras, C. ; Burns, C. R. ; Phillips, M. M. ; Galbany, L. ; Anderson, J. P. ; Baltay, C. ; Baron, E. ; Castellón, S. ; Davis, S. ; Freedman, Wendy L. ; Gall, C. ; Gonzalez, C. ; Graham, M. L. ; Hamuy, M. ; Holoien, T. W.S. ; Karamehmetoglu, E. ; Krisciunas, K. ; Kumar, S. ; Kuncarayakti, H. ; Morrell, N. ; Moriya, T. J. ; Nugent, P. E. ; Perlmutter, S. ; Persson, S. E. ; Piro, A. L. ; Rabinowitz, D. ; Roth, M. ; Shahbandeh, M. ; Shappee, B. J. ; Stritzinger, M. D. ; Suntzeff, N. B. ; Taddia, F. ; Uddin, S. A. / Carnegie Supernova Project II : The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events. In: Astrophysical Journal. 2020 ; Vol. 900, No. 2.

Bibtex

@article{17940f7f930e4411933a915a27bad5f0,

title = "Carnegie Supernova Project II: The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events",

abstract = "The Type Ia supernova (SN Ia) LSQ14fmg exhibits exaggerated properties that may help to reveal the origin of the {"}super-Chandrasekhar{"}(or 03fg-like) group. The optical spectrum is typical of a 03fg-like SN Ia, but the light curves are unlike those of any SNe Ia observed. The light curves of LSQ14fmg rise extremely slowly. At -23 rest-frame days relative to B-band maximum, LSQ14fmg is already brighter than MV = -19 mag before host extinction correction. The observed color curves show a flat evolution from the earliest observation to approximately 1 week after maximum. The near-infrared light curves peak brighter than -20.5 mag in the J and H bands, far more luminous than any 03fg-like SNe Ia with near-infrared observations. At 1 month past maximum, the optical light curves decline rapidly. The early, slow rise and flat color evolution are interpreted to result from an additional excess flux from a power source other than the radioactive decay of the synthesized 56Ni. The excess flux matches the interaction with a typical superwind of an asymptotic giant branch (AGB) star in density structure, mass-loss rate, and duration. The rapid decline starting at around 1 month past B-band maximum may be an indication of rapid cooling by active carbon monoxide (CO) formation, which requires a low-temperature and high-density environment. These peculiarities point to an AGB progenitor near the end of its evolution and the core degenerate scenario as the likely explosion mechanism for LSQ14fmg.",

author = "Hsiao, {E. Y.} and P. Hoeflich and C. Ashall and J. Lu and C. Contreras and Burns, {C. R.} and Phillips, {M. M.} and L. Galbany and Anderson, {J. P.} and C. Baltay and E. Baron and S. Castell{\'o}n and S. Davis and Freedman, {Wendy L.} and C. Gall and C. Gonzalez and Graham, {M. L.} and M. Hamuy and Holoien, {T. W.S.} and E. Karamehmetoglu and K. Krisciunas and S. Kumar and H. Kuncarayakti and N. Morrell and Moriya, {T. J.} and Nugent, {P. E.} and S. Perlmutter and Persson, {S. E.} and Piro, {A. L.} and D. Rabinowitz and M. Roth and M. Shahbandeh and Shappee, {B. J.} and Stritzinger, {M. D.} and Suntzeff, {N. B.} and F. Taddia and Uddin, {S. A.}",

year = "2020",

doi = "10.3847/1538-4357/abaf4c",

language = "English",

volume = "900",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "Institute of Physics Publishing, Inc",

number = "2",

}

RIS

TY - JOUR

T1 - Carnegie Supernova Project II

T2 - The Slowest Rising Type Ia Supernova LSQ14fmg and Clues to the Origin of Super-Chandrasekhar/03fg-like Events

AU - Hsiao, E. Y.

AU - Hoeflich, P.

AU - Ashall, C.

AU - Lu, J.

AU - Contreras, C.

AU - Burns, C. R.

AU - Phillips, M. M.

AU - Galbany, L.

AU - Anderson, J. P.

AU - Baltay, C.

AU - Baron, E.

AU - Castellón, S.

AU - Davis, S.

AU - Freedman, Wendy L.

AU - Gall, C.

AU - Gonzalez, C.

AU - Graham, M. L.

AU - Hamuy, M.

AU - Holoien, T. W.S.

AU - Karamehmetoglu, E.

AU - Krisciunas, K.

AU - Kumar, S.

AU - Kuncarayakti, H.

AU - Morrell, N.

AU - Moriya, T. J.

AU - Nugent, P. E.

AU - Perlmutter, S.

AU - Persson, S. E.

AU - Piro, A. L.

AU - Rabinowitz, D.

AU - Roth, M.

AU - Shahbandeh, M.

AU - Shappee, B. J.

AU - Stritzinger, M. D.

AU - Suntzeff, N. B.

AU - Taddia, F.

AU - Uddin, S. A.

PY - 2020

Y1 - 2020

N2 - The Type Ia supernova (SN Ia) LSQ14fmg exhibits exaggerated properties that may help to reveal the origin of the "super-Chandrasekhar"(or 03fg-like) group. The optical spectrum is typical of a 03fg-like SN Ia, but the light curves are unlike those of any SNe Ia observed. The light curves of LSQ14fmg rise extremely slowly. At -23 rest-frame days relative to B-band maximum, LSQ14fmg is already brighter than MV = -19 mag before host extinction correction. The observed color curves show a flat evolution from the earliest observation to approximately 1 week after maximum. The near-infrared light curves peak brighter than -20.5 mag in the J and H bands, far more luminous than any 03fg-like SNe Ia with near-infrared observations. At 1 month past maximum, the optical light curves decline rapidly. The early, slow rise and flat color evolution are interpreted to result from an additional excess flux from a power source other than the radioactive decay of the synthesized 56Ni. The excess flux matches the interaction with a typical superwind of an asymptotic giant branch (AGB) star in density structure, mass-loss rate, and duration. The rapid decline starting at around 1 month past B-band maximum may be an indication of rapid cooling by active carbon monoxide (CO) formation, which requires a low-temperature and high-density environment. These peculiarities point to an AGB progenitor near the end of its evolution and the core degenerate scenario as the likely explosion mechanism for LSQ14fmg.

AB - The Type Ia supernova (SN Ia) LSQ14fmg exhibits exaggerated properties that may help to reveal the origin of the "super-Chandrasekhar"(or 03fg-like) group. The optical spectrum is typical of a 03fg-like SN Ia, but the light curves are unlike those of any SNe Ia observed. The light curves of LSQ14fmg rise extremely slowly. At -23 rest-frame days relative to B-band maximum, LSQ14fmg is already brighter than MV = -19 mag before host extinction correction. The observed color curves show a flat evolution from the earliest observation to approximately 1 week after maximum. The near-infrared light curves peak brighter than -20.5 mag in the J and H bands, far more luminous than any 03fg-like SNe Ia with near-infrared observations. At 1 month past maximum, the optical light curves decline rapidly. The early, slow rise and flat color evolution are interpreted to result from an additional excess flux from a power source other than the radioactive decay of the synthesized 56Ni. The excess flux matches the interaction with a typical superwind of an asymptotic giant branch (AGB) star in density structure, mass-loss rate, and duration. The rapid decline starting at around 1 month past B-band maximum may be an indication of rapid cooling by active carbon monoxide (CO) formation, which requires a low-temperature and high-density environment. These peculiarities point to an AGB progenitor near the end of its evolution and the core degenerate scenario as the likely explosion mechanism for LSQ14fmg.

U2 - 10.3847/1538-4357/abaf4c

DO - 10.3847/1538-4357/abaf4c

M3 - Journal article

AN - SCOPUS:85091015134

VL - 900

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 140

ER -

ID: 270668727