Brightest star cluster candidates in eight late-type galaxies of the local complex

Abstract

The magnitudes and colon of 48 star cluster candidates in the galaxies NGC 1560, IC 10, UGCA 86, UGCA 105, DDO 165, Ho I, Ho I1 and Ho 1X are obtained from the plates taken at the 6-m telescope. From 3 to 11 such objects are found in each galaxy. The distribution of all cluster candidates on the color -absolute magnitude diagram is close to the distribution of the LMC clusters. Depending on the luminosity, three groups of objects are distinguished -very bright, bright and of intermediate brightness. Their absolute magnitudes are about -10, -9 and -8 mag, respectively. By the colors, i.e. by the age, three groups of the objects are revealed too -young, intermediate and old. In the galaxies Ho I and DDO 165, old (globular) cluster candidates are not found.

CCD imaging of twenty nearby isolated irregular galaxies

“…17. Three brightest blue supergiant candidates, #34, 40, and 35 in Table 14, give us a distance modulus of 29.08, which is lower than the estimate µ 0 (3B) = 29.51 derived by Georgiev et al (1997). We have not found red stars in this galaxy.…”

Structure and stellar content of dwarf galaxies

“…5 and 4. 5, but for our purposes the images were Makarova et al (1997Makarova et al ( , 1998 1, 4 , Tikhonov & Karachentsev (1998) 2 and Georgiev et al (1997) 3 . A gallery of our images is shown in Fig.…”

“…Accurate distances are becoming available as photometric distance determinations 1 (Makarova et al 1997;Georgiev et al 1997;Tikhonov & Karachentsev 1998;Makarova et al 1998;Karachentsev & Drozdovsky 1998). The combination of distance information and photometry will enable a thorough study of the photometric parameters of these systems.…”

Stellar population of the irregular galaxy IC 10

“…(Karachentsev & Tikhonov 1993) pointed out seven candidates for star clusters in IC 10 and (Georgiev et al 1996) provided photometric data on them. Based on HST ACS/WFC images, we checked these possible clusters and found that four of them are actually star clusters, while three probable clusters are outside the available HST images.…”