Centaurus A: VLT Views of the Nearest Giant Elliptical Galaxy
Astrophysics and space science(2004)
摘要
VLT images in BVI are used to identify globular clusters in the central region of NGC5128. Based on the sizes, optical magnitudes and colors, a hundred candidate globular clusters are identified with projected galactocentric distances 1 kpc < R G < 5 kpc. These clusters have magnitudes 18 < V < 20.5 or −10.3 < M V < −7.8 at the distance of this galaxy, and colors 0.8 < V − I < 1.5 and 0.5 < B − V < 1.5. These identifications allow us to compare the properties of the X-ray globular cluster population discovered recently in this galaxy.
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关键词
Centaurus A: NGC5128,globular clusters,X-ray sources
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