Infrared Photometry of Red Supergiant Variables and the Distance to M101

Details Infrared Photometry of Red Supergiant Variables and the Distance to M101 Infrared Photometry of Red Supergiant Variables and the Distance to M101

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.1303j&link_type=abstract

American Astronomical Society Meeting 208, #13.03; Bulletin of the American Astronomical Society, Vol. 38, p.92

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We performed infrared photometry in the J and K bands for nineteen red supergiant variable stars (RSVs) in the spiral galaxy M101 with the intention of determining the distance to M101. Our infrared images were obtained with the infrared imager, NSFCAM, at the NASA Infrared Telescope Facility. Using our infrared photometry and previously published periods for those RSVs, we derived the period-luminosity relationship for the RSVs in M101. From the period-luminosity relationship we determined the distance modulus for M101 to be (m - M) = 29.35 ± 0.24 mag based on a distance modulus of 18.5 mag for the LMC. This corresponds to a distance of 7.4 ± 0.8 Mpc for M101.

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