scholarly journals CCD photometry of variable stars in the field of the globular cluster NGC 6397

1997 ◽  
Vol 122 (1) ◽  
pp. 1-7 ◽  
Author(s):  
J. Kaluzny
Keyword(s):  
Globular Cluster ◽  
Variable Stars ◽  
Ccd Photometry

scholarly journals CCD Observations of Variable Stars in Globular Clusters

1989 ◽  
Vol 111 ◽  
pp. 285-285
Author(s):  
H.A. Smith ◽  
J.R. Kuhn ◽  
J. Curtis
Keyword(s):  
Globular Cluster ◽  
Globular Clusters ◽  
Variable Stars ◽  
Michigan State University ◽  
State University ◽  
Ccd Photometry ◽  
Rr Lyrae ◽  
Short Period ◽  
Ccd Observations ◽  
Period Variable

AbstractBVR observations of the relatively metal-rich globular cluster NGC 6388 have been obtained with a CCD on the CTIO 0.9 m telescope. Eighteen possible short period variable stars have been discovered in or near the cluster. At least 10 of these are probable RR Lyrae members of NGC 6388. We confirm the finding of Hazen and Hesser that this cluster is one of the most metal-rich to contain a significant number of RR Lyraes. A program of CCD photometry of field and cluster variable stars has been initiated on the 0.6m telescope of the Michigan State University Observatory.

CCD Photometry of Faint Variable Stars in the Field of the Globular Cluster M4

1997 ◽  
Vol 113 ◽  
pp. 2219 ◽  
Author(s):  
Janusz Kaluzny ◽  
Ian B. Thompson ◽  
Wojtek Krzeminski
Keyword(s):  
Globular Cluster ◽  
Variable Stars ◽  
Ccd Photometry

scholarly journals CCD Photometry of Variable Stars in the Globular Cluster RU 106

1995 ◽  
Vol 110 ◽  
pp. 2206 ◽  
Author(s):  
Janusz Kaluzny ◽  
Wojciech Krzeminski ◽  
Beata Mazur
Keyword(s):  
Globular Cluster ◽  
Variable Stars ◽  
Ccd Photometry

Deep CCD photometry and variable stars in the metal-rich globular cluster M71

1992 ◽  
Vol 103 ◽  
pp. 460 ◽  
Author(s):  
Philip J. C. Hodder ◽  
James M. Nemec ◽  
Harvey B. Richer ◽  
Gregory G. Fahlman
Keyword(s):  
Globular Cluster ◽  
Variable Stars ◽  
Ccd Photometry

VR CCD Photometry of Variable Stars in the Globular Cluster NGC 4147

2019 ◽  
Vol 158 (1) ◽  
pp. 51 ◽  
Author(s):  
Sneh Lata ◽  
A. K. Pandey ◽  
J. C. Pandey ◽  
R. K. S. Yadav ◽  
Shashi B. Pandey ◽  
...  
Keyword(s):  
Globular Cluster ◽  
Variable Stars ◽  
Ccd Photometry

scholarly journals CCD Photometry of Faint Variable Stars in the Globular Cluster NGC 6752

1999 ◽  
Vol 118 (1) ◽  
pp. 462-467 ◽  
Author(s):  
Ian B. Thompson ◽  
Janusz Kaluzny ◽  
Wojtek Pych ◽  
Wojtek Krzeminski
Keyword(s):  
Globular Cluster ◽  
Variable Stars ◽  
Ccd Photometry

scholarly journals The RR Lyrae Variables in M54 and the Sgr Dwarf Galaxy

2002 ◽  
Vol 207 ◽  
pp. 168-170
Author(s):  
C. Cacciari ◽  
M. Bellazzini ◽  
S. Colucci
Keyword(s):  
Recent Work ◽  
Globular Cluster ◽  
Stellar Population ◽  
Dwarf Galaxy ◽  
Variable Stars ◽  
Ccd Photometry ◽  
Rr Lyrae ◽  
Red Giant

We report on new B, V and I CCD photometry of the globular cluster M54 that was aimed at the study of its variable stars. With respect to the previous most recent work on M54 we have nearly doubled the number of detected variable stars: M54 can now be classified as intermediate in the Oosterhoff groups. The metallicity can be estimated for the cluster and field red giant stellar population, and for the variables.

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

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