Constraining the Progenitor System of the Type Ia Supernova 2021aefx

Griffin Hosseinzadeh; David J. Sand; Peter Lundqvist; Jennifer E. Andrews; K. Azalee Bostroem; Yize Dong; Daryl Janzen; Jacob E. Jencson; Michael Lundquist; Nicolas E. Meza Retamal; Jeniveve Pearson; Stefano Valenti; Samuel Wyatt; Jamison Burke; D. Andrew Howell; Curtis McCully; Megan Newsome; Estefania Padilla Gonzalez; Craig Pellegrino; Giacomo Terreran; Lindsey A. Kwok; Saurabh W. Jha; Jay Strader; Esha Kundu; Stuart D. Ryder; Joshua Haislip; Vladimir Kouprianov; Daniel E. Reichart

doi:10.3847/2041-8213/ac7cef

Constraining the Progenitor System of the Type Ia Supernova 2021aefx

Griffin Hosseinzadeh, David J. Sand, Peter Lundqvist, Jennifer E. Andrews, K. Azalee Bostroem, Yize Dong, Daryl Janzen, Jacob E. Jencson, Michael Lundquist, Nicolas E. Meza Retamal, Jeniveve Pearson, Stefano Valenti, Samuel Wyatt, Jamison Burke, D. Andrew Howell, Curtis McCully, Megan Newsome, Estefania Padilla Gonzalez, Craig Pellegrino, Giacomo TerreranLindsey A. Kwok, Saurabh W. Jha, Jay Strader, Esha Kundu, Stuart D. Ryder, Joshua Haislip, Vladimir Kouprianov, Daniel E. Reichart

Astronomy

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28 Scopus citations

Abstract

We present high-cadence optical and ultraviolet light curves of the normal Type Ia supernova (SN) 2021aefx, which shows an early bump during the first two days of observation. This bump may be a signature of interaction between the exploding white dwarf and a nondegenerate binary companion, or it may be intrinsic to the white dwarf explosion mechanism. In the case of the former, the short duration of the bump implies a relatively compact main-sequence companion star, although this conclusion is viewing-angle dependent. Our best-fit companion-shocking and double-detonation models both overpredict the UV luminosity during the bump, and existing nickel-shell models do not match the strength and timescale of the bump. We also present nebular spectra of SN 2021aefx, which do not show the hydrogen or helium emission expected from a nondegenerate companion, as well as a radio nondetection that rules out all symbiotic progenitor systems and most accretion disk winds. Our analysis places strong but conflicting constraints on the progenitor of SN 2021aefx; no current model can explain all of our observations.

Original language	English (US)
Article number	L45
Journal	Astrophysical Journal Letters
Volume	933
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/ac7cef
State	Published - Jul 1 2022

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Hosseinzadeh, G., Sand, D. J., Lundqvist, P., Andrews, J. E., Bostroem, K. A., Dong, Y., Janzen, D., Jencson, J. E., Lundquist, M., Meza Retamal, N. E., Pearson, J., Valenti, S., Wyatt, S., Burke, J., Howell, D. A., McCully, C., Newsome, M., Gonzalez, E. P., Pellegrino, C., ... Reichart, D. E. (2022). Constraining the Progenitor System of the Type Ia Supernova 2021aefx. Astrophysical Journal Letters, 933(2), Article L45. https://doi.org/10.3847/2041-8213/ac7cef

Hosseinzadeh, G, Sand, DJ, Lundqvist, P, Andrews, JE, Bostroem, KA, Dong, Y, Janzen, D, Jencson, JE, Lundquist, M, Meza Retamal, NE, Pearson, J, Valenti, S, Wyatt, S, Burke, J, Howell, DA, McCully, C, Newsome, M, Gonzalez, EP, Pellegrino, C, Terreran, G, Kwok, LA, Jha, SW, Strader, J, Kundu, E, Ryder, SD, Haislip, J, Kouprianov, V & Reichart, DE 2022, 'Constraining the Progenitor System of the Type Ia Supernova 2021aefx', Astrophysical Journal Letters, vol. 933, no. 2, L45. https://doi.org/10.3847/2041-8213/ac7cef

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title = "Constraining the Progenitor System of the Type Ia Supernova 2021aefx",

abstract = "We present high-cadence optical and ultraviolet light curves of the normal Type Ia supernova (SN) 2021aefx, which shows an early bump during the first two days of observation. This bump may be a signature of interaction between the exploding white dwarf and a nondegenerate binary companion, or it may be intrinsic to the white dwarf explosion mechanism. In the case of the former, the short duration of the bump implies a relatively compact main-sequence companion star, although this conclusion is viewing-angle dependent. Our best-fit companion-shocking and double-detonation models both overpredict the UV luminosity during the bump, and existing nickel-shell models do not match the strength and timescale of the bump. We also present nebular spectra of SN 2021aefx, which do not show the hydrogen or helium emission expected from a nondegenerate companion, as well as a radio nondetection that rules out all symbiotic progenitor systems and most accretion disk winds. Our analysis places strong but conflicting constraints on the progenitor of SN 2021aefx; no current model can explain all of our observations.",

author = "Griffin Hosseinzadeh and Sand, {David J.} and Peter Lundqvist and Andrews, {Jennifer E.} and Bostroem, {K. Azalee} and Yize Dong and Daryl Janzen and Jencson, {Jacob E.} and Michael Lundquist and {Meza Retamal}, {Nicolas E.} and Jeniveve Pearson and Stefano Valenti and Samuel Wyatt and Jamison Burke and Howell, {D. Andrew} and Curtis McCully and Megan Newsome and Gonzalez, {Estefania Padilla} and Craig Pellegrino and Giacomo Terreran and Kwok, {Lindsey A.} and Jha, {Saurabh W.} and Jay Strader and Esha Kundu and Ryder, {Stuart D.} and Joshua Haislip and Vladimir Kouprianov and Reichart, {Daniel E.}",

note = "Publisher Copyright: {\textcopyright} 2022. The Author(s). Published by the American Astronomical Society.",

year = "2022",

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doi = "10.3847/2041-8213/ac7cef",

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T1 - Constraining the Progenitor System of the Type Ia Supernova 2021aefx

AU - Hosseinzadeh, Griffin

AU - Sand, David J.

AU - Lundqvist, Peter

AU - Andrews, Jennifer E.

AU - Bostroem, K. Azalee

AU - Dong, Yize

AU - Janzen, Daryl

AU - Jencson, Jacob E.

AU - Lundquist, Michael

AU - Meza Retamal, Nicolas E.

AU - Pearson, Jeniveve

AU - Valenti, Stefano

AU - Wyatt, Samuel

AU - Burke, Jamison

AU - Howell, D. Andrew

AU - McCully, Curtis

AU - Newsome, Megan

AU - Gonzalez, Estefania Padilla

AU - Pellegrino, Craig

AU - Terreran, Giacomo

AU - Kwok, Lindsey A.

AU - Jha, Saurabh W.

AU - Strader, Jay

AU - Kundu, Esha

AU - Ryder, Stuart D.

AU - Haislip, Joshua

AU - Kouprianov, Vladimir

AU - Reichart, Daniel E.

PY - 2022/7/1

Y1 - 2022/7/1

N2 - We present high-cadence optical and ultraviolet light curves of the normal Type Ia supernova (SN) 2021aefx, which shows an early bump during the first two days of observation. This bump may be a signature of interaction between the exploding white dwarf and a nondegenerate binary companion, or it may be intrinsic to the white dwarf explosion mechanism. In the case of the former, the short duration of the bump implies a relatively compact main-sequence companion star, although this conclusion is viewing-angle dependent. Our best-fit companion-shocking and double-detonation models both overpredict the UV luminosity during the bump, and existing nickel-shell models do not match the strength and timescale of the bump. We also present nebular spectra of SN 2021aefx, which do not show the hydrogen or helium emission expected from a nondegenerate companion, as well as a radio nondetection that rules out all symbiotic progenitor systems and most accretion disk winds. Our analysis places strong but conflicting constraints on the progenitor of SN 2021aefx; no current model can explain all of our observations.

AB - We present high-cadence optical and ultraviolet light curves of the normal Type Ia supernova (SN) 2021aefx, which shows an early bump during the first two days of observation. This bump may be a signature of interaction between the exploding white dwarf and a nondegenerate binary companion, or it may be intrinsic to the white dwarf explosion mechanism. In the case of the former, the short duration of the bump implies a relatively compact main-sequence companion star, although this conclusion is viewing-angle dependent. Our best-fit companion-shocking and double-detonation models both overpredict the UV luminosity during the bump, and existing nickel-shell models do not match the strength and timescale of the bump. We also present nebular spectra of SN 2021aefx, which do not show the hydrogen or helium emission expected from a nondegenerate companion, as well as a radio nondetection that rules out all symbiotic progenitor systems and most accretion disk winds. Our analysis places strong but conflicting constraints on the progenitor of SN 2021aefx; no current model can explain all of our observations.

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M1 - L45

ER -

Constraining the Progenitor System of the Type Ia Supernova 2021aefx

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