- [*] An HST census of nuclear star clusters in late-type spiral galaxies:
I. Observations and image analysis
- Boeker T., Laine S., van der Marel R.P., Sarzi M., Rix H.W., Ho L.,
- AJ, 123, 1389-1410, 2002
this paper in the ADS
We present new HST I-band images of a sample of 77 nearby,
late-type spiral galaxies with low inclination. The main purpose of
this catalog is to study the frequency and properties of nuclear star
clusters. In 59 galaxies of our sample, we have identified a distinct,
compact (but resolved), and dominant source at or very close to their
photocenter. We present surface brightness profiles, derived from
elliptical isophote fits, of all galaxies for which the fit was
successful. We use the fitted isophotes at radii larger than $2\as$
to check whether the location of the cluster coincides with the
photocenter of the galaxy, and confirm that in nearly all cases, we
are truly dealing with ``nuclear'' star clusters. From analytical
fits to the surface brightness profiles, we derive the cluster
luminosities after subtraction of the light contribution of the
underlying galaxy disk and/or bulge.
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Last modified May 8, 2002.
Roeland van der Marel,