SIMBAD references

2020ApJ...892..142H - Astrophys. J., 892, 142-142 (2020/April-1)

SN 2017cfd: a normal Type Ia supernova discovered very young.

HAN X., ZHENG W., STAHL B.E., BURKE J., VINKO J., DE JAEGER T., ARCAVI I., BRINK T.G., CSEH B., HIRAMATSU D., HOSSEINZADEH G., HOWELL D.A., IGNACZ B., KONYVES-TOTH R., KREZINGER M., McCULLY C., ORDASI A., PINTER D., SARNECZKY K., SZAKATS R., TANG K., VIDA K., WANG J., WEI J., WHEELER J.C., XIN L. and FILIPPENKO A.V.

Abstract (from CDS):

The Type Ia supernova (SN Ia) 2017cfd in IC 0511 (redshift z=0.01209±0.00016) was discovered by the Lick Observatory Supernova Search 1.6 ± 0.7 day after the fitted first-light time (15.2 days before B-band maximum brightness). Photometric and spectroscopic follow-up observations show that SN 2017cfd is a typical, normal SN Ia with a peak luminosity MB~-19.2±0.2 mag, Δm15(B) = 1.16 mag, and reached a B-band maximum ∼16.8 days after the first light. We estimate there to be moderately strong host-galaxy extinction (AV = 0.39 ± 0.03 mag) based on MLCS2k2 fitting. The spectrum reveals a Si II λ6355 velocity of ∼11,200 km s–1 at peak brightness. SN 2017cfd was discovered very young, with multiband data taken starting 2 days after the first light, making it a valuable complement to the currently small sample (fewer than a dozen) of SNe Ia with color data at such early times. We find that its intrinsic early-time (B-V)0 color evolution belongs to the "blue" population rather than to the distinct "red" population. Using the photometry, we constrain the companion-star radius to be <=2.5 R with the Kasen model, thus ruling out a red-giant companion.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Type Ia supernovae

Simbad objects: 24

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2021.04.23-05:21:08

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