Cosmic Flows: Univ. Hawaii 2.2m I-band Photometry
Helene M. Courtois, R. Brent Tully, Philippe Heraudeau
TL;DR
This paper presents I-band photometry data for 524 nearby galaxies obtained with the University of Hawaii 2.2m telescope, aimed at improving galaxy distance measurements and structural studies.
Contribution
Provides a large, accurate I-band photometric dataset for 524 galaxies, supporting distance estimation and structural analysis in the Cosmic Flows project.
Findings
Total magnitude accuracy of 0.08 mag
Data extend to 7-8 exponential disk scalelengths
Useful for galaxy distance and structural studies
Abstract
Within the "Cosmic Flows" project, I-band photometry of 524 relatively nearby galaxies has been carried out over the course of several years with the University of Hawaii 2.2m telescope and a camera with a 7.5 arcmin field of view. The primary scientific purpose was to provide global magnitudes and inclinations for galaxies for the purpose of measuring distances through the correlation between galaxy luminosities and rotation rates. The accuracy on a total magnitude is 0.08 mag. The observations typically extend to 7-8 exponential disk scalelengths so the data are useful for studies of the structural properties of galaxies.
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