1998AJ....116..220W

Query : 1998AJ....116..220W

1998AJ....116..220W - Astron. J., 116, 220-236 (1998/July-0)

CCD photometry of galactic globular clusters. IV. The NGC 1851 RR Lyrae variables.

WALKER A.R.

Abstract (from CDS):

The variable-star population of the Galactic globular cluster NGC 1851 (C0512-400) has been studied by CCD photometry, from observations made in the B, V, and I bands during 1993-1994. Light curves are presented for 29 variables, seven of which are new discoveries. The behavior of the RR Lyrae stars in the period-temperature diagram appears normal when compared with clusters that bracket the NGC 1851 metallicity. Reddening and metallicity are reevaluated, with no compelling evidence being found to change from the values of E(B - V) = 0.02 and [Fe/H] = -1.29 (Zinn scale) adopted in recent studies of the cluster. Photometry is provided for stars in an annulus with radii 80" and 260" centered on NGC 1851. To at least V = 18.5 there is excellent agreement with the extensive earlier photometry for the brighter NGC 1851 stars, with systematics less than 0.02 mag in all colors. Instability-strip boundary positions for several clusters show a trend for the red boundary to move to redder colors as the metallicity increases.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Globular Clusters: Individual: NGC Number: NGC 1851 - Stars: Variables: RR Lyrae Variable

Nomenclature: Table 3: Cl* NGC 1851 W NNNNN Nos among (Nos 34-10649). Table 5: Cl* NGC 1851 SAW VNN (Nos V27-V33) added.

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

CDS comments: Table 7 : NGC 4499 misprint for IC 4499.

Simbad objects: 37

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Number of rows : 37
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 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
2 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
3 NGC 1466 GlC 03 44 32.71 -71 40 18.0   11.6 11.59     ~ 166 0
4 NAME Ret GlC 04 36 10.15 -58 51 34.8   14.00 14.25 13.50   ~ 177 1
5 NGC 1841 GlC 04 45 24.38 -83 59 53.3   12.23 11.43     ~ 190 0
6 2MASS J05140132-4002058 LP* 05 14 01.3390125663 -40 02 05.985532141     13.37     ~ 8 0
7 V* Y Col RR* 05 14 02.754648 -40 02 24.43632       14.437   ~ 5 0
8 Cl* NGC 1851 W 646 RR* 05 14 05.5351751832 -40 02 21.067842912   16.379 15.991     ~ 6 0
9 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
10 Cl* NGC 1851 W 654 RR* 05 14 09.75 -40 03 10.4   16.480 16.082     ~ 3 0
11 Cl* NGC 1851 W 702 RR* 05 14 09.9008095104 -40 02 12.063430752   16.404 16.039     ~ 11 0
12 Cl* NGC 1851 STET 190 RR* 05 14 10.9566284040 -40 06 09.071262144   16.454 16.119     ~ 9 0
13 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
14 NGC 2257 Cl* 06 30 12.62 -64 19 40.0   13.24 12.62     ~ 228 0
15 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
16 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 1069 0
17 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
18 IC 4499 GlC 15 00 18.57 -82 12 49.6     8.56     ~ 375 0
19 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
20 NGC 6338 Bla 17 15 22.9842192344 +57 24 40.346559927   14.2   8   ~ 205 2
21 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 637 0
22 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
23 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 465 0
24 Cl* NGC 1851 SAW V33 * ~ ~           ~ 1 0
25 Cl* NGC 1851 W 544 * ~ ~   16.295 16.067     ~ 6 0
26 Cl* NGC 1851 W 448 * ~ ~   16.084 15.868     ~ 1 0
27 Cl* NGC 1851 W 688 * ~ ~   16.28 16.03     ~ 6 0
28 Cl* NGC 1851 W 710 * ~ ~   16.18 15.91     ~ 5 0
29 Cl* NGC 1851 W 586 * ~ ~   16.307 16.054     ~ 5 0
30 Cl* NGC 1851 W 703 * ~ ~   16.489 16.127     ~ 5 0
31 Cl* NGC 1851 W 418 * ~ ~   15.919 15.449     ~ 4 0
32 Cl* NGC 1851 W 505 * ~ ~   16.148 15.851     ~ 4 0
33 Cl* NGC 1851 W 647 * ~ ~   16.328 16.111     ~ 5 0
34 Cl* NGC 1851 W 919 * ~ ~   16.412 16.084     ~ 2 0
35 Cl* NGC 1851 W 572 * ~ ~   16.378 15.964     ~ 1 0
36 Cl* NGC 1851 W 764 * ~ ~   16.515 16.119     ~ 1 0
37 Cl* NGC 1851 W 626 * ~ ~   16.343 16.118     ~ 5 0

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