The Mid-Infrared Tully-Fisher Relation: Calibration of the SNIa Scale and Ho - IN2P3 - Institut national de physique nucléaire et de physique des particules
Journal Articles The Astrophysical journal letters Year : 2012

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

J. Sorce
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R. Brent Tully
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Abstract

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.

Dates and versions

in2p3-00734331 , version 1 (21-09-2012)

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J. Sorce, R. Brent Tully, H.M. Courtois. The Mid-Infrared Tully-Fisher Relation: Calibration of the SNIa Scale and Ho. The Astrophysical journal letters, 2012, 758, pp.L12. ⟨10.1088/2041-8205/758/1/L12⟩. ⟨in2p3-00734331⟩
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