Optical and infrared photometry of the type Ia supernovae 1991T, 1991bg, 1999ek, 2001bt, 2001cn, 2001cz, and 2002bo

Kevin Krisciunas, Nicholas B. Suntzeff, Mark M. Phillips, Pablo Candia, José Luis Prieto, Roberto Antezana, Robin Chassagne, Hsiao Wen Chen, Mark Dickinson, Peter R. Eisenhardt, Juan Espinoza, Peter M. Garnavich, David González, Thomas E. Harrison, Mario Hamuy, Vladimir D. Ivanov, Wojtek Krzemiński, Craig Kulesa, Patrick McCarthy, Amaya Moro-MartínCésar Muena, Alberto Noriega-Crespo, S. E. Persson, Philip A. Pinto, Miguel Roth, Eric P. Rubenstein, S. Adam Stanford, Guy S. Stringfellow, Abner Zapata, Alain Porter, Marina Wischnjewsky

Research output: Contribution to journalArticlepeer-review

119 Scopus citations

Abstract

We present optical and/or infrared photometry of the Type la supernovae SN 1991T, SN 1991bg, SN 1999ek, SN 2001bt, SN 2001cn, SN 2001cz, and SN 2002bo. All but one of these supernovae have decline rate parameters, Δm 15(B), close to the median value of 1.1 for the whole class of Type la supernovae. The addition of these supernovae to the relationship between the near-infrared absolute magnitudes and Δm 15(B) strengthens the previous relationships we have found in that the maximum light absolute magnitudes are essentially independent of the decline rate parameter. (SN 1991bg, the prototype of the subclass of fast-declining Type Ia supernovae, is a special case.) The dispersion in the Hubble diagram in JHK is only ∼0.15 mag. The near-infrared properties of Type Ia supernovae continue to be excellent measures of the luminosity distances to the supernova host galaxies because of the need for only small corrections from the epoch of observation to maximum light, low dispersion in absolute magnitudes at maximum light, and the minimal reddening effects in the near-infrared.

Original languageEnglish (US)
Pages (from-to)3034-3052
Number of pages19
JournalAstronomical Journal
Volume128
Issue number6
DOIs
StatePublished - Dec 2004

Keywords

  • Supernovae: individual (SN 1991T, SN 1991bg, SN 1999ek, SN 2001bt, SN 2001cn, SN 2001cz, SN 2002bo)
  • Techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Optical and infrared photometry of the type Ia supernovae 1991T, 1991bg, 1999ek, 2001bt, 2001cn, 2001cz, and 2002bo'. Together they form a unique fingerprint.

Cite this