1998A&A...336L..77P

Query : 1998A&A...336L..77P

1998A&A...336L..77P - Astronomy and Astrophysics, volume 336L77-80 (1998/8-3)

Theoretical vs. semi-empirical relative ages of globular clusters.

PULONE L., SALARIS M., WEISS A. and BUONANNO R.

Abstract (from CDS):

Theoretical relative ages of galactic globular clusters have recently been challenged by a semi-empirical relation. It was used to point out that tested sets of isochrones were unable to reproduce the relation and yield internally inconsistent relative ages. We find that differential cluster ages derived with the isochrones by Salaris & Weiss (1998A&A...335..943S) are reliable and internally consistent. We also show that this consistency depends on using the lower absolute ages determined by Salaris & Weiss (1998A&A...335..943S) which therefore receive more empirical support. Moreover, we discuss the effect of the clusters absolute age on the evaluation of their differential ages, and its connection with the question of their age dispersion.

Abstract Copyright: ∼

Journal keyword(s): stars: evolution - population II - galaxy: evolution - globular clusters: general

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
3 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
4 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 579 0
5 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 883 0
6 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 547 0
7 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
8 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
9 Cl Pal 5 GlC 15 16 05.30 -00 06 41.0   15.1       ~ 797 1
10 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
11 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
12 NGC 6101 GlC 16 25 48.12 -72 12 07.9           ~ 337 0
13 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 835 0
14 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
15 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 425 0
16 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 637 0
17 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
18 NGC 6584 GlC 18 18 37.60 -52 12 56.8     8.17     ~ 317 0
19 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
20 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 384 0
21 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
22 NGC 7492 GlC 23 08 26.68 -15 36 41.3     10.48     ~ 330 0

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