Infrared array photometry of metal rich globular clusters. 2: Liller 1--the most metal rich cluster?

1995 ◽  
Vol 109 ◽  
pp. 1154 ◽  
Author(s):  
Jay A. Frogel ◽  
Leslie E. Kuchinski ◽  
Glenn P. Tiede
Keyword(s):  
Globular Clusters ◽  
Rich Cluster ◽  
Infrared Array

Deep Infrared Array Photometry of Globular Clusters. V. M28 (NGC 6626)

1996 ◽  
Vol 468 ◽  
pp. 641 ◽  
Author(s):  
T. J. Davidge ◽  
Patrick Cote ◽  
W. E. Harris
Keyword(s):  
Globular Clusters ◽  
Infrared Array

Infrared array photometry of metal-rich globular clusters. 1: Techniques and first results

1995 ◽  
Vol 109 ◽  
pp. 1131 ◽  
Author(s):  
Leslie E. Kuchinski ◽  
Jay A. Frogel ◽  
D. M. Terndrup ◽  
S. E. Persson
Keyword(s):  
Globular Clusters ◽  
First Results ◽  
Infrared Array

Deep infrared array photometry of globular clusters. 3: M13

1995 ◽  
Vol 445 ◽  
pp. 211 ◽  
Author(s):  
T. J. Davidge ◽  
W. E. Harris
Keyword(s):  
Globular Clusters ◽  
Infrared Array

Deep Infrared Array Photometry of Globular Clusters. III. M13: Erratum

1995 ◽  
Vol 454 ◽  
pp. 545
Author(s):  
T. J. Davidge ◽  
W. E. Harris
Keyword(s):  
Globular Clusters ◽  
Infrared Array

scholarly journals 1.1. The Galactic bulge

1998 ◽  
Vol 184 ◽  
pp. 11-18
Author(s):  
R. Michael Rich
Keyword(s):  
Star Formation ◽  
Globular Clusters ◽  
Galactic Center ◽  
Star Formation History ◽  
Galactic Bulge ◽  
Rich Cluster ◽  
Cluster Systems ◽  
Formation History ◽  
Metallicity Distribution ◽  
Review Current

I review current work on the Galactic bulge, with emphasis on issues that may connect to the environment of the Galactic Center. There is growing evidence that the field population of the bulge at RGC > 500pc is as old as the metal rich Galactic center globular clusters, and that field and clusters have the same spatial and metallicity distribution. We suggest that by analogy, extragalactic metal rich cluster systems, which also tend to follow the spheroid light, are old. On the other hand, there has been long standing evidence for an age gradient toward the Galactic center, and recent observations confirm without doubt that there is active star formation there. If a long-lived bar has been funneling gas (and inducing star formtion) in the central 100 pc, the star formation history there will be complicated and interesting.

Deep infrared array photometry of globular clusters. 2: M71

1994 ◽  
Vol 435 ◽  
pp. 207 ◽  
Author(s):  
T. J. Davidge ◽  
D. A. Simons
Keyword(s):  
Globular Clusters ◽  
Infrared Array

Deep Infrared Array Imaging of Globular Clusters. IV. M22 (NGC 6656)

1996 ◽  
Vol 462 ◽  
pp. 255 ◽  
Author(s):  
T. J. Davidge ◽  
W. E. Harris
Keyword(s):  
Globular Clusters ◽  
Array Imaging ◽  
Infrared Array

Deep Infrared Array Photometry of Globular Clusters. I. M4

1994 ◽  
Vol 423 ◽  
pp. 640 ◽  
Author(s):  
T. J. Davidge ◽  
D. A. Simons
Keyword(s):  
Globular Clusters ◽  
Infrared Array

scholarly journals Infrared Period-Luminosity Relations of RR Lyraes in M5 and Ml5

1993 ◽  
Vol 139 ◽  
pp. 30-30
Author(s):  
T. Liu ◽  
K. A. Janes
Keyword(s):  
Globular Clusters ◽  
Galactic Center ◽  
Accurate Determination ◽  
Rich Cluster ◽  
Reliable Determination ◽  
Rr Lyrae ◽  
Large Populations ◽  
Absolute Magnitudes ◽  
Type Studies ◽  
Ir Photometry

AbstractWe have carried out K band photometric observations of RR Lyrae stars in two globular clusters which both have large populations of RR Lyraes but different characteristics: the moderately metal-rich cluster M5 ([Fe/H] = –1.40) and the metal-poor one M15 ([Fe/H] = –2.15). The purpose is to accurately calibrate the linear relationship between RR Lyrae infrared (K) absolute magnitudes and their periods that has been confirmed by recent Baade-Wesselink type studies of RR Lyraes and IR photometry of cluster variables. A total of 47 RR Lyraes in M15 was observed and each has more than 8 measures on the average, which allows the accurate determination of a mean K magnitude for each star. In M5 44 stars have been observed with each RR Lyrae having 4 measurements. Our preliminary results show that the RR Lyrae infrared period-luminosity relations for the two clusters have roughly the same slope, despite the fact that they have a large metallicity difference. This suggests that the metallicity effect on the (MK)-log P relation is indeed small as one would expect. The M5 and M15 RR Lyrae IR photometry gives a reliable determination for the slope of the infrared period-luminosity relation because of the large number of stars measured. A well-calibrated (MK)-log P relation will be very useful in distance determinations to heavily reddened star regions such as the Galactic center and globular clusters in the Galactic bulge.

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