1999A&AS..136..461A


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.17CEST19:01:17

1999A&AS..136..461A - Astron. Astrophys., Suppl. Ser., 136, 461-470 (1999/May-1)

Deep multicolor CCD photometry of the globular cluster NGC 6723.

ALCAINO G., LILLER W., ALVARADO F., MIRONOV A., IPATOV A., PISKUNOV A., SAMUS N. and SMIRNOV O.

Abstract (from CDS):

We have obtained CCD UBVRI photometry of 3620 stars in the globular cluster NGC 6723, one of the few globular clusters with a horizontal branch well-populated on both sides of the instability strip. This is the first deep five-color study of NGC 6723. We have determined several important parameters for this cluster. Its color excess is E(B-V)=0.11±0.01. The most plausible value of metallicity is [Fe/H]=-1.22±0.15; even lower values are possible. The apparent distance modulus of the cluster is (m-M)V,6723=14.76. From isochrone analysis, we prefer the NGC 6723 age in the range between 15 and 16 Gyr, in the scale of Bergbusch & VandenBerg (1992ApJS...81..163B). We find a close similarity of the shape and slope of the red giant branch in NGC 6723 and M 3 and of the magnitude difference between the main-sequence turnoff and the horizontal branch in NGC 6723, M 3, and M 5.

Abstract Copyright:

Journal keyword(s): globular clusters: individual (NGC 6723)

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2313 0
2 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 446 0
3 NGC 6723 21 * ~ ~   14.55 12.95     ~ 5 0
4 NGC 6723 22 * ~ ~   14.69 14.26     ~ 5 0
5 NGC 6723 5 * ~ ~   13.75 13.26     ~ 4 0
6 NGC 6723 13 * ~ ~   16.38 15.41     ~ 5 0
7 Cl* NGC 6723 AWAL K * ~ ~   15.68 14.64     ~ 2 0
8 NGC 6723 20 * ~ ~   16.46 15.46     ~ 4 0
9 Cl* NGC 6723 AWAL J * ~ ~   15.38 14.64     ~ 2 0
10 NGC 6723 19 * ~ ~   16.11 15.42     ~ 5 0

    Equat.    Gal    SGal    Ecl

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