NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-17 T10:12:43 PST
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For refcode 1995A&A...299L..45L:
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
1995A&A...299L..45L Letter to the Editor Discovery of an excess of blue star clusters around Hickson 90 G. Longo, A. Grimaldi, and G. Richter Osservatorio Astronomico di Capodimonte, via Moiariello 16, I-80131 Napoli, Italy Astrophysikalisches Institut Potsdam, an der Sternwarte 16, D- 14482 Potsdam, Germany Received 31 January 1995/Accepted 4 May 1995 Abstract. We present deep CCD photometry in B and R for a sample of bright unresolved objects around the compact group of interacting galaxies Hickson 90. Even though the maximum of the luminosity function is not reached in our data, there is a clear excess of objects having absolute B magnitude ~ -9.0. The (B - R) colour index of these objects shows a marked excess of blue objects, thus suggesting that they are recently formed populous clusters. The luminosity function of the clusters is best fitted by a Gaussian with {sigma} = 1.4, which leads to a total cluster population of A=740+/-170. The large value of a compared to the relatively small value of A, can be explained by some age dispersion among the young clusters. This result supports the hypothesis that strong interactions can trigger the formation of populous clusters. Key words: Galaxies: general - Galaxies: interactions - Galaxies: star clusters
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