Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/~marel/abstracts/abs_R33.html
Дата изменения: Sun Aug 11 19:01:52 2002
Дата индексирования: Tue Oct 2 11:55:01 2012
Кодировка:
Поисковые слова: http www.astronet.ru db msg 1186753
Abstract
header graphic
************************

Abstract

************************

[*] 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., Shields J.
AJ, 123, 1389-1410, 2002

[*] Citations to 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.
Arrow Return to my bibliography.              Home Return to my home page.
Last modified May 8, 2002.
Roeland van der Marel, marel@stsci.edu.
Copyright Notice.