| Title | The stellar content and distance of UGC 4483 |
| Authors | Dolphin, A. E.; Makarova, L.; Karachentsev, I. D.; Karachentseva, V. E.; Geisler, D.; Grebel, E. K.; Guhathakurta, P.; Hodge, P. W.; Sarajedini, A.; Seitzer, P. |
| Bibcode | 2001MNRAS.324..249D Search ADS ↗ |
| Abstract | We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M81/NGC 2403 complex. Stellar photometry was carried out with HSTphot, and is complete to V~=26.0 and I~=24.7. We measure the red giant branch tip at I=23.56+/-0.10, and calculate a distance modulus of μ0=27.53+/-0.12 (corresponding to a distance of 3.2+/-0.2Mpc), placing UGC 4483 within the NGC 2403 subgroup. We were able to measure properties of a previously known young star cluster in UGC 4483, finding integrated magnitudes of V=18.66+/-0.21 and I=18.54+/-0.10 for the stellar contribution (integrated light minus Hα and [Oiii] contribution), corresponding to an age of ~10-15Myr and an initial mass of ~104Msolar. This is consistent with the properties of the cluster's brightest stars, which were resolved in the data for the first time. Finally, a numerical analysis of the galaxy's stellar content yields a roughly constant star formation rate of 1.3×10-3Msolaryr-1 and mean metallicity of [Fe/H]=-1.3dex from 15Gyr ago to the present. |
| Objects | 5 Objects Search NED ↙ |
