A HUBBLE DIAGRAM FROM TYPE II SUPERNOVAE BASED SOLELY ON PHOTOMETRY: THE PHOTOMETRIC COLOR METHOD - UTU Research Portal

A1 Refereed original research article in a scientific journal

A HUBBLE DIAGRAM FROM TYPE II SUPERNOVAE BASED SOLELY ON PHOTOMETRY: THE PHOTOMETRIC COLOR METHOD

Authors: de Jaeger T, Gonzalez-Gaitan S, Anderson JP, Galbany L, Hamuy M, Phillips MM, Stritzinger MD, Gutierrez CP, Bolt L, Burns CR, Campillay A, Castellon S, Contreras C, Folatelli G, Freedman WL, Hsiao EY, Krisciunas K, Krzeminski W, Kuncarayakti H, Morrell N, Olivares F, Persson SE, Suntzeff N

Publisher: IOP PUBLISHING LTD

Publication year: 2015

Journal: Astrophysical Journal

Journal name in source: ASTROPHYSICAL JOURNAL

Journal acronym: ASTROPHYS J

Article number: ARTN 121

Volume: 815

Issue: 2

Number of pages: 13

ISSN: 0004-637X

eISSN: 1538-4357

DOI: https://doi.org/10.1088/0004-637X/815/2/121

Web address : https://iopscience.iop.org/article/10.1088/0004-637X/815/2/121

Abstract

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.