| Title | The Discovery of Cepheids and a New Distance to NGC 2841 Using the Hubble Space Telescope |
| Authors | Macri, L. M.; Stetson, P. B.; Bothun, G. D.; Freedman, W. L.; Garnavich, P. M.; Jha, S.; Madore, B. F.; Richmond, M. W. |
| Bibcode | 2001ApJ...559..243M Search ADS ↗ |
| Abstract | 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 μ0=18.50+/-0.10 mag (D=50+/-2.5 kpc) and a metallicity dependence of the Cepheid P-L relation of γVI=-0.2+/-0.2 mag dex-1. Based on observations with the NASA/ESA Hubble Space Telescope (HST), obtained at the Space Telescope Science Institute, operated by AURA, Inc., under NASA contract NAS5-26555. |
| Objects | 12 Objects Search NED ↙ |
