Journal article

WFPC2 observations of compact star cluster nuclei in low-luminosity spiral galaxies

LD Matthews, JS Gallagher, JE Krist, AM Watson, CJ Burrows, RE Griffiths, JJ Hester, JT Trauger, GE Ballester, JT Clarke, D Crisp, RW Evans, JG Hoessel, JA Holtzman, JR Mould, PA Scowen, KR Stapelfeldt, JA Westphal

The Astronomical Journal | Published : 1999


We have used the Wide Field Planetary Camera 2 (WFPC2) aboard the Hubble Space Telescope to obtain F450W and F814W (B- and I-band) observations of the compact star cluster nuclei of the nearby, late-type, low-luminosity spiral galaxies NGC 4395, NGC 4242, and ESO 359-029. In addition, we analyze archival WFPC2 observations of the compact star cluster nucleus of M33. All of these galaxies are structurally diffuse, with moderately low surface brightnesses and little or no discernible bulge component. Here we present a comparative analysis of the structural and photometric properties of their nuclei. NGC 4395 contains a Seyfert 1 nucleus; M33 has some signatures of weak nuclear activity; the ot..

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