SIMBAD references

2020ApJ...895..118B - Astrophys. J., 895, 118-118 (2020/June-1)

SN 2013aa and SN 2017cbv: two sibling Type Ia supernovae in the spiral galaxy NGC 5643.

BURNS C.R., ASHALL C., CONTRERAS C., BROWN P., STRITZINGER M., PHILLIPS M.M., FLORES R., SUNTZEFF N.B., HSIAO E.Y., UDDIN S., SIMON J.D., KRISCIUNAS K., CAMPILLAY A., FOLEY R.J., FREEDMAN W.L., GALBANY L., GONZALEZ C., HOEFLICH P., HOLMBO S., KILPATRICK C.D., KIRSHNER R.P., MORRELL N., MUNOZ-ELGUETA N., PIRO A.L., ROJAS-BRAVO C., SAND D., VARGAS-GONZALEZ J., ULLOA N. and VILCHEZ J.A.

Abstract (from CDS):

We present photometric and spectroscopic observations of SN 2013aa and SN 2017cbv, two nearly identical type Ia supernovae (SNe Ia) in the host galaxy NGC 5643. The optical photometry has been obtained using the same telescope and instruments used by the Carnegie Supernova Project. This eliminates most instrumental systematics and provides light curves in a stable and well-understood photometric system. Having the same host galaxy also eliminates systematics due to distance and peculiar velocity, providing an opportunity to directly test the relative precision of SNe Ia as standard candles. The two SNe have nearly identical decline rates, negligible reddenings, and remarkably similar spectra, and, at a distance of ∼20 Mpc, they are ideal potential calibrators for the absolute distance using primary indicators such as Cepheid variables. We discuss to what extent these two SNe can be considered twins and compare them with other supernova "siblings" in the literature and their likely progenitor scenarios. Using 12 galaxies that hosted two or more SNe Ia, we find that when using SNe Ia, and after accounting for all sources of observational error, one gets consistency in distance to 3%.

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

Journal keyword(s): Distance indicators - Type Ia supernovae - Interstellar dust extinction - Galaxy distances

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 55

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2020.10.25-10:11:51

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