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Astronomical Journal 144 (2012) 133
The mid-infrared Tully-Fisher relation: Spitzer Surface Photometry
J. Sorce1, H.M. Courtois1, R. Brent Tully
(2012)

The availability of photometric imaging of several thousand galaxies with the Spitzer Space Telescope enables a mid-infrared calibration of the correlation between luminosity and rotation in spiral galaxies. The most important advantage of the new calibration in the 3.6 micron band, IRAC ch.1, is photometric consistency across the entire sky. Additional advantages are minimal obscuration, observations of flux dominated by old stars, and sensitivity to low surface brightness levels due to favorable backgrounds. Through Spitzer cycle 7 roughly 3000 galaxies had been observed and images of these are available at the Spitzer archive. In cycle 8 a program called Cosmic Flows with Spitzer has been initiated that will increase by 1274 the available sample of spiral galaxies with inclinations greater than 45 degrees from face-on suitable for distance measurements. This paper describes procedures based on the photometry package Archangel that are being employed to analyze both the archival and the new data in a uniform way. We give results for 235 galaxies, our calibrator sample for the Tully-Fisher relation. Galaxy magnitudes are determined with uncertainties held below 0.05 mag for normal spiral systems. A subsequent paper will describe the calibration of the [3.6] luminosity-rotation relation.
1:  IPNL - Institut de Physique Nucléaire de Lyon
Supernova
Cosmologie Observationnelle
Sciences of the Universe/Astrophysics/Galactic Astrophysics

Physics/Astrophysics/Galactic Astrophysics

Sciences of the Universe/Astrophysics/Cosmology and Extra-Galactic Astrophysics

Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics
Fulltext link: 
http://fr.arXiv.org/abs/1208.3309