SN 2018agk: a prototypical type Ia supernova with a smooth power-law rise in kepler (K2)

Qinan Wang; Armin Rest; Yossef Zenati; Ryan Ridden-Harper; Georgios Dimitriadis; Gautham Narayan; V. Ashley Villar; Mark R. Magee; Ryan J. Foley; Edward J. Shaya; Peter Garnavich; Lifan Wang; Lei Hu; Attila Bódi; Patrick Armstrong; Katie Auchettl; Thomas Barclay; Geert Barentsen; Zsófia Bognár; Joseph Brimacombe; Joanna Bulger; Jamison Burke; Peter Challis; Kenneth Chambers; David A. Coulter; Géza Csörnyei; Borbála Cseh; Maxime Deckers; Jessie L. Dotson; Lluis Galbany; Santiago González-Gaitán; Mariusz Gromadzki; Michael Gully-Santiago; Ottó Hanyecz; Christina Hedges; Daichi Hiramatsu; Griffin Hosseinzadeh; D. Andrew Howell; Steve B. Howell; Mark E. Huber; Saurabh W. Jha; David O. Jones; Réka Könyves-Tóth; Csilla Kalup; Charles D. Kilpatrick; Matt Nicholl; Sofia Rest; Stephen J. Smartt; Ken Smith; David R. Young

doi:10.3847/1538-4357/ac2c84

SN 2018agk: a prototypical type Ia supernova with a smooth power-law rise in kepler (K2)

Qinan Wang, Armin Rest, Yossef Zenati, Ryan Ridden-Harper, Georgios Dimitriadis, Gautham Narayan, V. Ashley Villar, Mark R. Magee, Ryan J. Foley, Edward J. Shaya, Peter Garnavich, Lifan Wang, Lei Hu, Attila Bódi, Patrick Armstrong, Katie Auchettl, Thomas Barclay, Geert Barentsen, Zsófia Bognár, Joseph BrimacombeJoanna Bulger, Jamison Burke, Peter Challis, Kenneth Chambers, David A. Coulter, Géza Csörnyei, Borbála Cseh, Maxime Deckers, Jessie L. Dotson, Lluis Galbany, Santiago González-Gaitán, Mariusz Gromadzki, Michael Gully-Santiago, Ottó Hanyecz, Christina Hedges, Daichi Hiramatsu, Griffin Hosseinzadeh, D. Andrew Howell, Steve B. Howell, Mark E. Huber, Saurabh W. Jha, David O. Jones, Réka Könyves-Tóth, Csilla Kalup, Charles D. Kilpatrick, Matt Nicholl, Sofia Rest, Stephen J. Smartt, Ken Smith, David R. Young

School of Mathematics and Physics

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Abstract

We present the 30 minutes cadence Kepler/K2 light curve of the Type Ia supernova (SN Ia) SN 2018agk, covering approximately one week before explosion, the full rise phase, and the decline until 40 days after peak. We additionally present ground-based observations in multiple bands within the same time range, including the 1 day cadence DECam observations within the first ∼5 days after the first light. The Kepler early light curve is fully consistent with a single power-law rise, without evidence of any bump feature. We compare SN 2018agk with a sample of other SNe Ia without early excess flux from the literature. We find that SNe Ia without excess flux have slowly evolving early colors in a narrow range (g − i ≈ −0.20 ± 0.20 mag) within the first ∼10 days. On the other hand, among SNe Ia detected with excess, SN 2017cbv and SN 2018oh tend to be bluer, while iPTF16abc's evolution is similar to normal SNe Ia without excess in g − i. We further compare the Kepler light curve of SN 2018agk with companion-interaction models, and rule out the existence of a typical nondegenerate companion undergoing Roche lobe overflow at viewing angles smaller than 45°.

Original language	English
Article number	167
Number of pages	22
Journal	The Astrophysical Journal
Volume	923
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ac2c84
Publication status	Published - 20 Dec 2021

Keywords

1728
1668
2109
Astrophysics - High Energy Astrophysical Phenomena

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Wang, Q., Rest, A., Zenati, Y., Ridden-Harper, R., Dimitriadis, G., Narayan, G., Villar, V. A., Magee, M. R., Foley, R. J., Shaya, E. J., Garnavich, P., Wang, L., Hu, L., Bódi, A., Armstrong, P., Auchettl, K., Barclay, T., Barentsen, G., Bognár, Z., ... Young, D. R. (2021). SN 2018agk: a prototypical type Ia supernova with a smooth power-law rise in kepler (K2). The Astrophysical Journal, 923(2), Article 167. https://doi.org/10.3847/1538-4357/ac2c84

@article{397d4e8455544d039d0efbdb980a3063,

title = "SN 2018agk: a prototypical type Ia supernova with a smooth power-law rise in kepler (K2)",

abstract = "We present the 30 minutes cadence Kepler/K2 light curve of the Type Ia supernova (SN Ia) SN 2018agk, covering approximately one week before explosion, the full rise phase, and the decline until 40 days after peak. We additionally present ground-based observations in multiple bands within the same time range, including the 1 day cadence DECam observations within the first ∼5 days after the first light. The Kepler early light curve is fully consistent with a single power-law rise, without evidence of any bump feature. We compare SN 2018agk with a sample of other SNe Ia without early excess flux from the literature. We find that SNe Ia without excess flux have slowly evolving early colors in a narrow range (g − i ≈ −0.20 ± 0.20 mag) within the first ∼10 days. On the other hand, among SNe Ia detected with excess, SN 2017cbv and SN 2018oh tend to be bluer, while iPTF16abc's evolution is similar to normal SNe Ia without excess in g − i. We further compare the Kepler light curve of SN 2018agk with companion-interaction models, and rule out the existence of a typical nondegenerate companion undergoing Roche lobe overflow at viewing angles smaller than 45°.",

keywords = "1728, 1668, 2109, Astrophysics - High Energy Astrophysical Phenomena",

author = "Qinan Wang and Armin Rest and Yossef Zenati and Ryan Ridden-Harper and Georgios Dimitriadis and Gautham Narayan and Villar, {V. Ashley} and Magee, {Mark R.} and Foley, {Ryan J.} and Shaya, {Edward J.} and Peter Garnavich and Lifan Wang and Lei Hu and Attila B{\'o}di and Patrick Armstrong and Katie Auchettl and Thomas Barclay and Geert Barentsen and Zs{\'o}fia Bogn{\'a}r and Joseph Brimacombe and Joanna Bulger and Jamison Burke and Peter Challis and Kenneth Chambers and Coulter, {David A.} and G{\'e}za Cs{\"o}rnyei and Borb{\'a}la Cseh and Maxime Deckers and Dotson, {Jessie L.} and Lluis Galbany and Santiago Gonz{\'a}lez-Gait{\'a}n and Mariusz Gromadzki and Michael Gully-Santiago and Ott{\'o} Hanyecz and Christina Hedges and Daichi Hiramatsu and Griffin Hosseinzadeh and Howell, {D. Andrew} and Howell, {Steve B.} and Huber, {Mark E.} and Jha, {Saurabh W.} and Jones, {David O.} and R{\'e}ka K{\"o}nyves-T{\'o}th and Csilla Kalup and Kilpatrick, {Charles D.} and Matt Nicholl and Sofia Rest and Smartt, {Stephen J.} and Ken Smith and Young, {David R.}",

year = "2021",

month = dec,

day = "20",

doi = "10.3847/1538-4357/ac2c84",

language = "English",

volume = "923",

journal = "The Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd",

number = "2",

}

Wang, Q, Rest, A, Zenati, Y, Ridden-Harper, R, Dimitriadis, G, Narayan, G, Villar, VA, Magee, MR, Foley, RJ, Shaya, EJ, Garnavich, P, Wang, L, Hu, L, Bódi, A, Armstrong, P, Auchettl, K, Barclay, T, Barentsen, G, Bognár, Z, Brimacombe, J, Bulger, J, Burke, J, Challis, P, Chambers, K, Coulter, DA, Csörnyei, G, Cseh, B, Deckers, M, Dotson, JL, Galbany, L, González-Gaitán, S, Gromadzki, M, Gully-Santiago, M, Hanyecz, O, Hedges, C, Hiramatsu, D, Hosseinzadeh, G, Howell, DA, Howell, SB, Huber, ME, Jha, SW, Jones, DO, Könyves-Tóth, R, Kalup, C, Kilpatrick, CD, Nicholl, M, Rest, S, Smartt, SJ , Smith, K & Young, DR 2021, 'SN 2018agk: a prototypical type Ia supernova with a smooth power-law rise in kepler (K2)', The Astrophysical Journal, vol. 923, no. 2, 167. https://doi.org/10.3847/1538-4357/ac2c84

TY - JOUR

T1 - SN 2018agk: a prototypical type Ia supernova with a smooth power-law rise in kepler (K2)

AU - Wang, Qinan

AU - Rest, Armin

AU - Zenati, Yossef

AU - Ridden-Harper, Ryan

AU - Dimitriadis, Georgios

AU - Narayan, Gautham

AU - Villar, V. Ashley

AU - Magee, Mark R.

AU - Foley, Ryan J.

AU - Shaya, Edward J.

AU - Garnavich, Peter

AU - Wang, Lifan

AU - Hu, Lei

AU - Bódi, Attila

AU - Armstrong, Patrick

AU - Auchettl, Katie

AU - Barclay, Thomas

AU - Barentsen, Geert

AU - Bognár, Zsófia

AU - Brimacombe, Joseph

AU - Bulger, Joanna

AU - Burke, Jamison

AU - Challis, Peter

AU - Chambers, Kenneth

AU - Coulter, David A.

AU - Csörnyei, Géza

AU - Cseh, Borbála

AU - Deckers, Maxime

AU - Dotson, Jessie L.

AU - Galbany, Lluis

AU - González-Gaitán, Santiago

AU - Gromadzki, Mariusz

AU - Gully-Santiago, Michael

AU - Hanyecz, Ottó

AU - Hedges, Christina

AU - Hiramatsu, Daichi

AU - Hosseinzadeh, Griffin

AU - Howell, D. Andrew

AU - Howell, Steve B.

AU - Huber, Mark E.

AU - Jha, Saurabh W.

AU - Jones, David O.

AU - Könyves-Tóth, Réka

AU - Kalup, Csilla

AU - Kilpatrick, Charles D.

AU - Nicholl, Matt

AU - Rest, Sofia

AU - Smartt, Stephen J.

AU - Smith, Ken

AU - Young, David R.

PY - 2021/12/20

Y1 - 2021/12/20

N2 - We present the 30 minutes cadence Kepler/K2 light curve of the Type Ia supernova (SN Ia) SN 2018agk, covering approximately one week before explosion, the full rise phase, and the decline until 40 days after peak. We additionally present ground-based observations in multiple bands within the same time range, including the 1 day cadence DECam observations within the first ∼5 days after the first light. The Kepler early light curve is fully consistent with a single power-law rise, without evidence of any bump feature. We compare SN 2018agk with a sample of other SNe Ia without early excess flux from the literature. We find that SNe Ia without excess flux have slowly evolving early colors in a narrow range (g − i ≈ −0.20 ± 0.20 mag) within the first ∼10 days. On the other hand, among SNe Ia detected with excess, SN 2017cbv and SN 2018oh tend to be bluer, while iPTF16abc's evolution is similar to normal SNe Ia without excess in g − i. We further compare the Kepler light curve of SN 2018agk with companion-interaction models, and rule out the existence of a typical nondegenerate companion undergoing Roche lobe overflow at viewing angles smaller than 45°.

AB - We present the 30 minutes cadence Kepler/K2 light curve of the Type Ia supernova (SN Ia) SN 2018agk, covering approximately one week before explosion, the full rise phase, and the decline until 40 days after peak. We additionally present ground-based observations in multiple bands within the same time range, including the 1 day cadence DECam observations within the first ∼5 days after the first light. The Kepler early light curve is fully consistent with a single power-law rise, without evidence of any bump feature. We compare SN 2018agk with a sample of other SNe Ia without early excess flux from the literature. We find that SNe Ia without excess flux have slowly evolving early colors in a narrow range (g − i ≈ −0.20 ± 0.20 mag) within the first ∼10 days. On the other hand, among SNe Ia detected with excess, SN 2017cbv and SN 2018oh tend to be bluer, while iPTF16abc's evolution is similar to normal SNe Ia without excess in g − i. We further compare the Kepler light curve of SN 2018agk with companion-interaction models, and rule out the existence of a typical nondegenerate companion undergoing Roche lobe overflow at viewing angles smaller than 45°.

KW - 1728

KW - 1668

KW - 2109

KW - Astrophysics - High Energy Astrophysical Phenomena

U2 - 10.3847/1538-4357/ac2c84

DO - 10.3847/1538-4357/ac2c84

M3 - Article

SN - 0004-637X

VL - 923

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 2

M1 - 167

ER -

SN 2018agk: a prototypical type Ia supernova with a smooth power-law rise in kepler (K2)

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