2021ApJ...923..167W

Query : 2021ApJ...923..167W

2021ApJ...923..167W - Astrophys. J., 923, 167-167 (2021/December-3)

SN 2018agk: a prototypical Type Ia supernova with a smooth power-law rise in Kepler (K2).

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., BODI A., ARMSTRONG P., AUCHETTL K., BARCLAY T., BARENTSEN G., BOGNAR Z., BRIMACOMBE J., BULGER J., BURKE J., CHALLIS P., CHAMBERS K., COULTER D.A., CSORNYEI G., CSEH B., DECKERS M., DOTSON J.L., GALBANY L., GONZALEZ-GAITAN S., GROMADZKI M., GULLY-SANTIAGO M., HANYECZ O., HEDGES C., HIRAMATSU D., HOSSEINZADEH G., HOWELL D.A., HOWELL S.B., HUBER M.E., JHA S.W., JONES D.O., KONYVES-TOTH R., KALUP C., KILPATRICK C.D., KRISKOVICS L., LI W., LOWE T.B., MARGHEIM S., McCULLY C., MITRA A., MUNOZ J.A., NICHOLL M., NORDIN J., PAL A., PAN Y.-C., PIRO A.L., REST S., RINO-SILVESTRE J., ROJAS-BRAVO C., SARNECZKY K., SIEBERT M.R., SMARTT S.J., SMITH K., SODOR A., STRITZINGER M.D., SZABO R., SZAKATS R., TUCKER B.E., VINKO J., WANG X., WHEELER J.C., YOUNG D.R., ZENTENO A., ZHANG K. and ZSIDI G.

Abstract (from CDS):

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°.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Type Ia supernovae - Supernovae - Time domain astronomy

VizieR on-line data: <Available at CDS (J/ApJ/923/167): table3.dat table4.dat table5.dat fig2.dat sp/*>

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 2009ig SN* 02 38 11.62 -01 18 45.3           SNIa-norm 168 1
2 SN 2015F SN* 07 36 15.76 -69 30 23.0           SNIa 100 1
3 SN 2018gv SN* 08 05 34.6 -11 26 16           SNIa-norm 47 0
4 SN 2018oh SN* 09 06 39.6 +19 20 18           SNIa-norm 91 0
5 SN 2018agk SN* 13 10 36.373 -04 29 08.67           SNIa 12 0
6 IC 855 G 13 10 36.9 -04 29 06   14.66       ~ 9 0
7 SN 2016bln SN* 13 34 45.6 +13 51 14           SNIa-norm 62 0
8 SN 2011fe SN* 14 03 05.711 +54 16 25.22   10.12 10.06     SNIa-norm 747 1
9 SN 2017cbv SN* 14 32 34.420 -44 08 02.74           SNIa 146 0

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