Journal article

Visible and far-ultraviolet WFPC2 imaging of the nucleus of the galaxy NGC 205

DH Jones, JR Mould, AM Watson, C Grillmair, JS Gallagher, GE Ballester, CJ Burrows, S Casertano, JT Clarke, D Crisp, RE Griffiths, JJ Hester, JG Hoessel, JA Holtzman, PA Scowen, KR Stapelfeldt, JT Trauger, JA Westphal

Astrophysical Journal | Published : 1996

Abstract

We have imaged the nucleus of NGC 205 through the F555W and F160BW filters of WFPC2 on the high-resolution planetary camera (PC). The nucleus consists of a resolved cluster of stars extending 7" × 6". The projected radial distribution of surface brightness can be fitted by a Hubble law with a small core of FWHM 214 × 190 mas (0.74 × 0.66 pc). We find that the nucleus of NGC 205 shares a number of characteristics with globular clusters. Absolute photometry is also presented in a half-arcsec aperture and is found to verify the amount of UV upturn observed in the spectral energy distribution of the nucleus by others (e.g., Bertola et al. 1995). Of the hypotheses available to explain the origin ..

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