TY - JOUR
T1 - Hubble Space Telescope imaging of globular clusters in the edge-on spiral galaxies NGC 4565 and NGC 5907
AU - Kissler-Patig, Markus
AU - Ashman, Keith M.
AU - Zepf, Stephen E.
AU - Freeman, Kenneth C.
PY - 1999/7
Y1 - 1999/7
N2 - We present a study of the globular cluster systems of two edge-on spiral galaxies, NGC 4565 and NGC 5907, from WFPC2 images in the F450W and F814W filters. The globular cluster systems of both galaxies appear to be similar to the Galactic globular cluster system. In particular, we derive total numbers of globular clusters of NGC(4565) = 204 ± 38+87-53 and NGC(5907) = 170 ± 41+47-72 (where the first are statistical, the second potential systematic errors) for NGC 4565 and NGC 5907, respectively. This determination is based on a comparison with the Milky Way system, for which we adopt a total number of globular clusters of 180 ± 20. The specific frequency of both galaxies is SN ≃ 0.6, indistinguishable from the value for the Milky Way. The similarity in the globular cluster systems of the two galaxies is noteworthy, since they have significantly different thick disks and bulge-to-disk ratios. This would suggest that these two components do not play a major role in the building up of a globular cluster system around late-type galaxies.
AB - We present a study of the globular cluster systems of two edge-on spiral galaxies, NGC 4565 and NGC 5907, from WFPC2 images in the F450W and F814W filters. The globular cluster systems of both galaxies appear to be similar to the Galactic globular cluster system. In particular, we derive total numbers of globular clusters of NGC(4565) = 204 ± 38+87-53 and NGC(5907) = 170 ± 41+47-72 (where the first are statistical, the second potential systematic errors) for NGC 4565 and NGC 5907, respectively. This determination is based on a comparison with the Milky Way system, for which we adopt a total number of globular clusters of 180 ± 20. The specific frequency of both galaxies is SN ≃ 0.6, indistinguishable from the value for the Milky Way. The similarity in the globular cluster systems of the two galaxies is noteworthy, since they have significantly different thick disks and bulge-to-disk ratios. This would suggest that these two components do not play a major role in the building up of a globular cluster system around late-type galaxies.
KW - Galaxies: formation
KW - Galaxies: individual (NGC 4565, NGC 5907)
KW - Galaxies: star clusters
UR - http://www.scopus.com/inward/record.url?scp=0000828737&partnerID=8YFLogxK
U2 - 10.1086/300919
DO - 10.1086/300919
M3 - Article
SN - 0004-6256
VL - 118
SP - 197
EP - 207
JO - Astronomical Journal
JF - Astronomical Journal
IS - 1
ER -