HAL : in2p3-00734331, version 1

arXiv : 1208.3311

DOI : 10.1088/2041-8205/758/1/L12

Fiche détaillée

Récupérer au format BibTeX - EndNote - TEI - RefWorks -

Astrophysical Journal Letters 758 (2012) L12

The Mid-Infrared Tully-Fisher Relation: Calibration of the SNIa Scale and Ho

J. Sorce1, R. Brent Tully, H. Courtois1

(2012)

This paper builds on a calibration of the SNIa absolute distance scale begun with a core of distances based on the correlation between galaxy rotation rates and optical Ic band photometry. This new work extends the calibration through the use of mid-infrared photometry acquired at 3.6 microns with Spitzer Space Telescope. The great virtue of the satellite observations is constancy of the photometry at a level better than 1% across the sky. The new calibration is based on 39 individual galaxies and 8 clusters that have been the sites of well observed SNIa. The new 3.6 micron calibration is not yet as extensively based as the Ic band calibration but is already sufficient to justify a preliminary report. Distances based on the mid-infrared photometry are 2% greater in the mean than reported at Ic band. This difference is only marginally significant. The Ic band result is confirmed with only a small adjustment. Incorporating a 1% decrease in the LMC distance, the present study indicates Ho = 75.2 +/- 3.0 km/s/Mpc.

1 :	IPNL - Institut de Physique Nucléaire de Lyon

équipe(s) de recherche : Supernova

Thème(s)

:

Planète et Univers/Astrophysique/Astrophysique galactique Physique/Astrophysique/Astrophysique galactique Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

in2p3-00734331, version 1

http://hal.in2p3.fr/in2p3-00734331

oai:hal.in2p3.fr:in2p3-00734331

Contributeur : Sylvie Florès <>

Soumis le : Vendredi 21 Septembre 2012, 14:34:59

Dernière modification le : Mercredi 20 Mars 2013, 10:46:49