NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-24 T05:33:29 PDT
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For refcode 2015MNRAS.447.3639M:
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NED Abstract

Copyright by Royal Astronomical Society. 2015MNRAS.447.3639M Young star clusters in the interacting galaxies of Hickson Compact Group 90 Miah, J. A.; Sharples, R. M.; Cho, J. Abstract. Deep images of Hickson Compact Group 90 (HCG 90) have been obtained using the Advanced Camera for Surveys on the Hubble Space Telescope. We report results for star clusters observed in the interacting pair of galaxies NGC 7174 and NGC 7176. We present magnitude and colour distributions for the observed cluster population and find that the majority of objects show colours similar to intermediate/old age (>1 Gyr) globular clusters. However, a significant population of blue star clusters are also observed which may have formed from the tidal interaction currently occurring between the two galaxies. We find luminosity function turnover magnitudes of m^{TO}_g_ = 25.1 +/- 0.1 and m^{TO}_z_ = 24.3 +/- 0.1 for the g and z bands, respectively, implying distances of D_g_ = 28.8 +/- 2.6 Mpc and D_z_ = 34.7 +/- 3.1 Mpc to these galaxies, using the globular cluster luminosity function method. Lastly, we determine a total cluster population of approximately N_GC_ ~= 212 +/- 10 over all magnitudes and a low specific frequency of S_N_ ~ 0.6 +/- 0.1 for this pair of interacting elliptical and spiral galaxies. The small globular cluster population is likely due to tidal interactions taking place between the two galaxies which may have stripped many progenitor clusters away and formed the diffuse light observed at the core of HCG 90. Key words: galaxies: individuals: HCG 90, galaxies: individuals: NGC 7174, galaxies: individuals: NGC 7176, galaxies: interactions
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