----- Submission 1 (Wed May 04 08:32:49 GMT 2005) -----
Assigned ID: 65
----- Submission 1 (Thu Jan 20 14:40:30 GMT 2005) -----
Resolving the Connection Between Globular Clusters and Low-Mass X-ray Binaries
Because of their high central densities, globular clusters (GCs) are efficient producers of low-mass X-ray binaries (LMXBs). To shed light on the detailed formation mechanism of LXMBs in GCs, we propose to measure accurate structural parameters for hundreds of GCs in NGC 5128: the only giant elliptical galaxy within 5 Mpc of the Milky Way. We will carry out the first complete survey of GCs in the inner region of NGC 5128, measure GC structural parameters of unprecedented acccuracy, and derive GC luminosity profiles in the cluster cores. These measurement will allow us to determine precisely which GC structural properties control the presence of an X-ray source and thus probe the details of the LXMB formation process in GCs. We will additionally use the measured structural parameters to perform the most comprehensive study of the fundamental plane of GCs in early-type galaxies, a fundamental set of correlations which holds key information on GC formation and evolution.
We will observe 9 fields in the inner ~8 kpc of NGC5128 with ACS/WFC in order to detect and determine structural parameters of globular clusters in the fields. We will observe the fields in a single filter, F606W, using a four point dither pattern (the UDF pattern) in order to increase the sampling, and repair cosmic rays and defects. Each exposure in the pattern has 525 sec. Additionally, we will obtain a 58 sec exposure in order to guard against possible saturation for bright and compact globular clusters.
STELLAR POPULATIONS
12
false
0.0
false
false
false
false
false
SUPPORTED
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 25 9.7041
-42 56 45.50
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 25 20.2176
-42 54 15.11
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 25 55.8775
-43 04 50.52
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 25 27.9764
-42 58 1.31
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 25 38.6679
-42 55 13.86
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 25 45.9517
-42 59 16.87
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 24 56.2137
-43 01 53.14
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 24 59.8712
-43 04 52.53
J2000
EXT-CLUSTER
GLOBULAR CLUSTER
magnitude is that of a typical globular cluster in NGC 5128
J2000
13 25 12.6245
-43 07 9.98
J2000
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
ACS/WFC
Imaging
No
No
F606W
POS-TARG
DITHER
0.171
LINE
0.171
false
false
145.82
4
30.16
ACS-WFC-DITHER-BOX
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false
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