The Integrated Spectra of Metal-Rich Galactic Globular Clusters: A Two-Parameter Family

1988 ◽  
pp. 499-499
Author(s):  
James A. Rose ◽  
Michael J. Tripicco
Keyword(s):  
Globular Clusters ◽  
Parameter Family ◽  
Galactic Globular Clusters ◽  
Two Parameter

scholarly journals The Older Clusters in the Magellanic Clouds

1980 ◽  
Vol 85 ◽  
pp. 305-315 ◽  
Author(s):  
S.C.B. Gascoigne
Keyword(s):  
Globular Clusters ◽  
Magellanic Clouds ◽  
Parameter Family ◽  
List Type ◽  
Type Number ◽  
Cloud Clusters ◽  
The Galaxy ◽  
Long Time ◽  
The Subject ◽  
Two Parameter

We begin with Fig. 1, which somewhat aged though it may be still illustrates important aspects of the subject (Gascoigne 1971) (i)There is a clear division of cloud clusters into a blue and red group. The division corresponds to the mass around 2.51M⊙, at which core degeneracy first develops in stars approaching the giant branch. Such stars spend about three times as long on the giant branch and travel higher up it than the slightly heavier non-degenerate stars, and so dominate the colours of the clusters in which they occur.(ii)The red clusters are somewhat less luminous than the globular clusters in the galaxy. Freeman and Chun (1972) have shown from dynamic arguments that the cloud clusters are also less massive, by enough to keep the M/L ratios roughly the same as those in the galaxy.(iii)For a long time it has been taken that the blue clusters are young and the red clusters old. Thus the clouds present us with a truly two-parameter family of globular-like clusters, the parameters being of course age and abundance.

Extending the Red Giant Branch versus Metallicity Calibration toward Metal-poor Systems: Near-Infrared Photometry of the Galactic Globular Clusters M56 and M15

2000 ◽  
Vol 119 (5) ◽  
pp. 2274-2281 ◽  
Author(s):  
Valentin D. Ivanov ◽  
Jordanka Borissova ◽  
Almudena Alonso-Herrero ◽  
Tatiana Russeva
Keyword(s):  
Globular Clusters ◽  
Near Infrared ◽  
Infrared Photometry ◽  
Galactic Globular Clusters ◽  
Red Giant

scholarly journals The holographic conformal manifold of 3d $$ \mathcal{N} $$ = 2 S-fold SCFTs

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Nikolay Bobev ◽  
Friðrik Freyr Gautason ◽  
Jesse van Muiden
Keyword(s):  
String Theory ◽  
Three Dimensional ◽  
Parameter Family ◽  
Global Symmetry ◽  
Maximal Supergravity ◽  
All Solutions ◽  
Operator Spectrum ◽  
Type Iib String Theory ◽  
Two Parameter

Abstract We employ a non-compact gauging of four-dimensional maximal supergravity to construct a two-parameter family of AdS4 J-fold solutions preserving $$ \mathcal{N} $$ N = 2 supersymmetry. All solutions preserve $$ \mathfrak{u} $$ u (1) × $$ \mathfrak{u} $$ u (1) global symmetry and in special limits we recover the previously known $$ \mathfrak{su} $$ su (2) × $$ \mathfrak{u} $$ u (1) invariant $$ \mathcal{N} $$ N = 2 and $$ \mathfrak{su} $$ su (2) × $$ \mathfrak{su} $$ su (2) invariant $$ \mathcal{N} $$ N = 4 J-fold solutions. This family of AdS4 backgrounds can be uplifted to type IIB string theory and is holographically dual to the conformal manifold of a class of three-dimensional S-fold SCFTs obtained from the $$ \mathcal{N} $$ N = 4 T [U(N)] theory of Gaiotto-Witten. We find the spectrum of supergravity excitations of the AdS4 solutions and use it to study how the operator spectrum of the three-dimensional SCFT depends on the exactly marginal couplings.

Dynamics of a two-parameter family of maps of the interval

1986 ◽  
Vol 10 (5) ◽  
pp. 415-423 ◽  
Author(s):  
J.R. Pounder ◽  
Thomas D. Rogers
Keyword(s):  
Parameter Family ◽  
Two Parameter

scholarly journals RR Lyrae variables in Galactic globular clusters

2005 ◽  
Vol 437 (3) ◽  
pp. 1017-1021 ◽  
Author(s):  
M. Castellani ◽  
V. Castellani ◽  
S. Cassisi
Keyword(s):  
Globular Clusters ◽  
Rr Lyrae ◽  
Galactic Globular Clusters

scholarly journals Looking for tidal streams around Galactic globular clusters

2012 ◽  
Vol 19 ◽  
pp. 03008
Author(s):  
J.A. Carballo-Bello ◽  
D. Martínez-Delgado
Keyword(s):  
Globular Clusters ◽  
Galactic Globular Clusters ◽  
Tidal Streams

scholarly journals Bayesian analysis of two stellar populations in Galactic globular clusters– III. Analysis of 30 clusters

2016 ◽  
Vol 463 (4) ◽  
pp. 3768-3782 ◽  
Author(s):  
R. Wagner-Kaiser ◽  
D. C. Stenning ◽  
A. Sarajedini ◽  
T. von Hippel ◽  
D. A. van Dyk ◽  
...  
Keyword(s):  
Bayesian Analysis ◽  
Globular Clusters ◽  
Stellar Populations ◽  
Galactic Globular Clusters

scholarly journals The Relative Ages of Galactic Globular Clusters

1997 ◽  
Vol 109 ◽  
pp. 1321 ◽  
Author(s):  
A. Sarajedini ◽  
B. Chaboyer ◽  
P. Demarque
Keyword(s):  
Globular Clusters ◽  
Galactic Globular Clusters
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