A Hubble diagram from type II supernovae based solely on photometry: the photometric color method

We present a Hubble diagram of SNe II using corrected magnitudes derived only from photometry, with no input of spectral information. We use a data set from the Carnegie Supernovae Project I for which optical and near-infrared light curves were obtained. The apparent magnitude is corrected by two ob...

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Autor principal: Folatelli, Gastón
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
distance scale
galaxies: distances and redshifts
supernovae: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86411
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86411
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
distance scale
galaxies: distances and redshifts
supernovae: general
spellingShingle Ciencias Astronómicas
distance scale
galaxies: distances and redshifts
supernovae: general
Folatelli, Gastón
A Hubble diagram from type II supernovae based solely on photometry: the photometric color method
topic_facet Ciencias Astronómicas
distance scale
galaxies: distances and redshifts
supernovae: general
description We present a Hubble diagram of SNe II using corrected magnitudes derived only from photometry, with no input of spectral information. We use a data set from the Carnegie Supernovae Project I for which optical and near-infrared light curves were obtained. The apparent magnitude is corrected by two observables, one corresponding to the slope of the plateau in the V band and the second a color term. We obtain a dispersion of 0.44 mag using a combination of the (V - i) color and the r band and we are able to reduce the dispersion to 0.39 mag using our golden sample. A comparison of our photometric color method (PCM) with the standardized candle method (SCM) is also performed. The dispersion obtained for the SCM (which uses both photometric and spectroscopic information) is 0.29 mag, which compares with 0.43 mag from the PCM for the same SN sample. The construction of a photometric Hubble diagram is of high importance in the coming era of large photometric wide-field surveys, which will increase the detection rate of supernovae by orders of magnitude. Such numbers will prohibit spectroscopic follow up in the vast majority of cases, and hence methods must be deployed which can proceed using solely photometric data.
format Articulo
Articulo
author Folatelli, Gastón
author_facet Folatelli, Gastón
author_sort Folatelli, Gastón
title A Hubble diagram from type II supernovae based solely on photometry: the photometric color method
title_short A Hubble diagram from type II supernovae based solely on photometry: the photometric color method
title_full A Hubble diagram from type II supernovae based solely on photometry: the photometric color method
title_fullStr A Hubble diagram from type II supernovae based solely on photometry: the photometric color method
title_full_unstemmed A Hubble diagram from type II supernovae based solely on photometry: the photometric color method
title_sort hubble diagram from type ii supernovae based solely on photometry: the photometric color method
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86411
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