Journal
ASTROPHYSICAL JOURNAL
Volume 559, Issue 1, Pages 243-259Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/322395
Keywords
Cepheids; distance scale; galaxies : individual (NGC 2841)
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We report on the discovery of Cepheids in the spiral galaxy NGC 2841, based on observations made with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. NGC 2841 was observed over 12 epochs using the F555W filter and over five epochs using the F814W filter. Photometry was performed using the DAOPHOT/ALLFRAME package. We discovered a total of 29 variables, including 18 high-quality Cepheids with periods ranging from 15 to 40 days. Period-luminosity relations in the V and I bands, based on the high-quality Cepheids, yield a reddening-corrected distance modulus of 30.74 +/- 0.23 mag, which corresponds to a distance of 14.1 +/- 1.5 Mpc. Our distance is based on an assumed LMC distance modulus of mu (o) 18.50 +/- 0.10 mag (D = 50 +/- 2.5 kpc) and a metallicity dependence of the Cepheid P-L relation of gamma (VI) -0.2 +/- 0.2 mag dex(-1).
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