SIMBAD references

2001MNRAS.324..249D - Mon. Not. R. Astron. Soc., 324, 249-256 (2001/June-2)

The stellar content and distance of UGC 4483.

DOLPHIN A.E., MAKAROVA L., KARACHENTSEV I.D., KARACHENTSEVA V.E., GEISLER D., GREBEL E.K., GUHATHAKURTA P., HODGE P.W., SARAJEDINI A. and SEITZER P.

Abstract (from CDS):

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 ∼104M. 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 1.3x10–3M.yr–1 and mean metallicity of [Fe/H]=-1.3dex from 15Gyr ago to the present.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): galaxies: distances and redshifts - galaxies: individual: UGC 4483 - galaxies: irregular - galaxies: stellar content

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Simbad objects: 5

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