| Authors | Phelps, Randy L.; Sakai, Shoko; Freedman, Wendy L.; Madore, Barry F.; Saha, Abhijit; Stetson, Peter B.; Kennicutt, Robert C.; Mould, Jeremy R.; Ferrarese, Laura; Ford, Holland C.; Gibson, Brad K.; Graham, John A.; Han, Mingsheng; Hoessel, John G.; Huchra, John P.; Hughes, Shaun M.; Illingworth, Garth D.; Silbermann, N. A. |
| Abstract | We report on the discovery of 34 Cepheid variables in NGC 2090, with periods ranging between 5 and 58 days. Apparent V and I period-luminosity relations for Cepheids with P >= 10 days have been constructed, assuming a fiducial distance modulus, μ0, of 18.50 +/- 0.10 mag and a reddening, E(B-V), of 0.10 mag for the Large Magellanic Cloud. Using the ALLFRAME photometry package, an inferred reddening of E(V-I) = 0.09 +/- 0.02 mag (internal error) and a true distance modulus of 30.45 +/- 0.16 (random) +/- 0.16 (systematic) mag for NGC 2090 are found. The corresponding distance is 12.3 +/- 0.9 (random) +/- 0.9 (systematic) Mpc, a value that agrees at the 2.5% level with that derived from an independent analysis using a modified version of the DoPHOT photometry package. Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, operated by AURA, Inc., under NASA contract No. NAS5-26555. |
