2016A&A...592A.129G


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.28CEST03:35:42

2016A&A...592A.129G - Astronomy and Astrophysics, volume 592A, 129-129 (2016/8-1)

Applying the expanding photosphere and standardized candle methods to Type II-Plateau supernovae at cosmologically significant redshifts. The distance to SN 2013eq.

GALL E.E.E., KOTAK R., LEIBUNDGUT B., TAUBENBERGER S., HILLEBRANDT W. and KROMER M.

Abstract (from CDS):

Based on optical imaging and spectroscopy of the Type II-Plateau SN 2013eq, we present a comparative study of commonly used distance determination methods based on Type II supernovae. The occurrence of SN 2013eq in the Hubble flow (z=0.041±0.001) prompted us to investigate the implications of the difference between "angular" and "luminosity" distances within the framework of the expanding photosphere method (EPM) that relies upon a relation between flux and angular size to yield a distance. Following a re-derivation of the basic equations of the EPM for SNe at non-negligible redshifts, we conclude that the EPM results in an angular distance. The observed flux should be converted into the SN rest frame and the angular size, θ, has to be corrected by a factor of (1+z)2. Alternatively, the EPM angular distance can be converted to a luminosity distance by implementing a modification of the angular size. For SN 2013eq, we find EPM luminosity distances of DL=151±18Mpc and DL=164±20Mpc by making use of different sets of dilution factors taken from the literature. Application of the standardized candle method for Type II-P SNe results in an independent luminosity distance estimate (DL=168±16Mpc) that is consistent with the EPM estimate.

Abstract Copyright: © ESO, 2016

Journal keyword(s): supernovae: individual: SN 2013eq - distance scale

Status at CDS:  

CDS comments: Table A.1 calibrator stars not identified.

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1992am SN* 01 25 02.76 -04 39 00.9   18.5 18.5     SNIIP 53 1
2 SN 1999em SN* 04 41 27.04 -02 51 45.2   13.79 13.7     SNIIP 573 1
3 NGC 1637 AGN 04 41 28.229 -02 51 28.94   11.4   11.0 11.3 ~ 369 0
4 LSQ 13fn SN* 11 51 17.29 -29 36 41.1           SNIIn 9 0
5 SN 2013eq SN* 17 33 15.73 +36 28 35.2           SNII 2 0

    Equat.    Gal    SGal    Ecl

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2020.05.28-03:35:42

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