Gclusters :: Bibliographic item "gc364"

Release 11.12 ("Hergest Ridge")

Gclusters :: Bibliographic item "gc364"

Article ID: gc364

Author Da Costa, G. S.

Title C J0907-372 (Pyxis): A New Distant Galactic Globular Cluster
Journal Publications of the Astronomical Society of the Pacific, v.107, p.937
Year of publication 1995 (on gclusters from 2013-08-08 14:44:59 )

Abstract The prime focus camera of the Anglo-Australian Telescope has been used to image the object listed by Weinberger (PASP, 107, 58 [1995]) as a possible distant star cluster or dwarf spheroidal galaxy. The CCD data reveal this object to be a distant globular cluster of low central concentration. In particular, the color-magnitude diagram for the cluster core shows a sparse giant branch, a prominent red horizontal branch at R=18.75 and a main sequence turnoff near the limit of the data at R=22.0. A population of possible blue stragglers is also evident. Based on comparisons with the giant branches of standard globular clusters, the reddening to this cluster, designated C J0907-372 (Pyxis), is estimated to be 0.25 <= E(B-V) <= 0.40. The cluster is then approximately 35 kpc from the Sun and 37 kpc from the galactic center. With a core radius of ~14 pc, an estimated absolute magnitude M_V=-5.7 and a dominant red horizontal branch, C J0907-372 (Pyxis) has very similar properties to the other low luminosity globular clusters of the outer galactic halo.

Tags Pyxis
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Article ID: gc364
Author	Da Costa, G. S.
Title	C J0907-372 (Pyxis): A New Distant Galactic Globular Cluster
Journal	Publications of the Astronomical Society of the Pacific, v.107, p.937
Year of publication	1995 (on gclusters from 2013-08-08 14:44:59 )
Abstract	The prime focus camera of the Anglo-Australian Telescope has been used to image the object listed by Weinberger (PASP, 107, 58 [1995]) as a possible distant star cluster or dwarf spheroidal galaxy. The CCD data reveal this object to be a distant globular cluster of low central concentration. In particular, the color-magnitude diagram for the cluster core shows a sparse giant branch, a prominent red horizontal branch at R=18.75 and a main sequence turnoff near the limit of the data at R=22.0. A population of possible blue stragglers is also evident. Based on comparisons with the giant branches of standard globular clusters, the reddening to this cluster, designated C J0907-372 (Pyxis), is estimated to be 0.25 <= E(B-V) <= 0.40. The cluster is then approximately 35 kpc from the Sun and 37 kpc from the galactic center. With a core radius of ~14 pc, an estimated absolute magnitude M_V=-5.7 and a dominant red horizontal branch, C J0907-372 (Pyxis) has very similar properties to the other low luminosity globular clusters of the outer galactic halo.
Tags	Pyxis