2003A&A...398..541K

Query : 2003A&A...398..541K

2003A&A...398..541K - Astronomy and Astrophysics, volume 398541-550 (2003/2-1)

Variable stars in the globular cluster M13.

KOPACKI G., KOLACZKOWSKI Z. and PIGULSKI A.

Abstract (from CDS):

Result. of a search for variable stars in the central region of the globular cluster M13 are presented. Prior to this study, 36 variable and suspected variable stars were known in this cluster (Osborn, 2000AJ....119.2902O; Clement et al. 2001AJ....122.2587C). Of these stars, five were not observed by us. We find v3, v4, v10, v12, and v13 to be constant in light. Surprisingly, only two out of the ten variable star candidates of Kadla et al. (1980ATsir1136....5K) appear to be variable. Both are RRc variables. Additionally, three RR Lyrae stars and one SX Phoenicis variable are discovered. Three close frequencies are detected for an RRc star v36. It appears that this variable is another multi-periodic RR Lyrae star pulsating in non-radial modes. Light curves of the three known BL Herculis stars and all known RR Lyrae stars are presented. The total number of known RR Lyrae stars in M13 is now nine. Only one is an RRab star. The mean period of RRc variables amounts to 0.36±0.05d, suggesting that M13 should be included in the group of Oosterhoff type II globular clusters. Mean V magnitudes and ranges of variation are derived for seven RR Lyrae and three BL Herculis variables. Almost all observed bright giants show some degree of variability. In particular, we confirm the variability of two red giants announced to be variable by Osborn (2000AJ....119.2902O) and in addition find five new cases.

Abstract Copyright: ∼

Journal keyword(s): stars: population II - stars: variables: RR Lyr - stars: variables: Cepheids - globular clusters: individual: M 13

VizieR on-line data: <Available at CDS (J/A+A/398/541): coord.dat daovper.dat daovred.dat ismi.dat ismv.dat>

Nomenclature: Tables: Cl* NGC 6205 SAW VNN (Nos V34-V45) added.

Simbad objects: 71

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Number of rows : 71
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 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 907 0
2 Cl* NGC 5904 KUST 542 RR* 15 18 32.680 +02 05 32.20     15.129   14.695 ~ 15 0
3 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
4 NGC 6205 66 * 16 41 23.0399537280 +36 28 05.357933076   14.73 14.10     ~ 12 0
5 NGC 6205 72 RG* 16 41 24.0799988472 +36 25 30.784251324   13.54 12.32     ~ 73 0
6 NGC 6205 96 RG* 16 41 27.0864680880 +36 28 00.359401188   13.79 12.52     ~ 71 0
7 NGC 6205 135 * 16 41 29.77 +36 28 07.2   16.10 15.34     ~ 6 0
8 NGC 6205 194 RG* 16 41 31.9970786088 +36 28 29.999965224   13.54 12.03     ~ 58 0
9 NGC 6205 206 RR* 16 41 32.6563847592 +36 28 02.165035404   15.549 15.100     ~ 28 0
10 NGC 6205 216 * 16 41 33.43 +36 27 10.7   15.56 15.33     ~ 4 0
11 2MASS J16413368+3626077 pA* 16 41 33.6668708904 +36 26 07.783784952   12.98 13.14     B2p 79 0
12 NGC 6205 240 RG* 16 41 33.9173386656 +36 30 05.682748896   13.71 12.34     ~ 45 0
13 NGC 6205 258 * 16 41 34.4567229000 +36 30 04.791775824   14.48 13.46     G2III 7 0
14 NGC 6205 254 * 16 41 34.50 +36 27 52.3     14.57     ~ 4 0
15 NGC 6205 261 RG* 16 41 34.7595031656 +36 27 59.516329536   13.50 12.17   10.79 ~ 44 0
16 Cl* NGC 6205 BARN 55 RG* 16 41 35.5110144199 +36 27 27.411645285   12.1 11.94     ~ 8 0
17 Cl* NGC 6205 SAW V2 WV* 16 41 35.9002889688 +36 27 48.514286736   13.63 13.01     A8-F8 37 0
18 NGC 6205 322 * 16 41 36.40 +36 28 49.9   15.78 15.69     ~ 6 0
19 NGC 6205 324 RG* 16 41 36.6351298080 +36 26 35.468102904   13.65 12.00     ~ 47 0
20 2MASS J16413666+3627207 RG* 16 41 36.667 +36 27 20.73   14.53 13.78     ~ 11 0
21 NGC 6205 334 * 16 41 36.83 +36 26 30.4   15.18 14.32     ~ 4 0
22 NGC 6205 344 RR* 16 41 37.1258223552 +36 26 28.952161224   15.15 14.93     ~ 20 0
23 NGC 6205 414 RG* 16 41 38.6880896352 +36 25 37.905071700   13.61 12.14     ~ 65 0
24 NGC 6205 445 * 16 41 39.2195 +36 27 23.510     12.20     ~ 8 0
25 Cl* NGC 6205 GBF 10848 V* 16 41 40.01 +36 26 41.5   13.80 12.51     G2 12 0
26 NGC 6205 519 * 16 41 40.44 +36 27 29.9           ~ 4 0
27 NGC 6205 526 HB* 16 41 40.6810778904 +36 26 20.032863828   14.21 13.82     ~ 18 0
28 NGC 6205 554 * 16 41 41.1342 +36 27 22.987     12.70     ~ 9 0
29 NGC 6205 568 * 16 41 41.27 +36 28 13.0           ~ 4 0
30 Cl* NGC 6205 SAW V35 RR* 16 41 41.43 +36 27 47.1           ~ 6 0
31 NGC 6205 575 * 16 41 41.6133 +36 27 38.380     17.84     ~ 5 0
32 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
33 NGC 6205 598 RG* 16 41 41.9443189176 +36 26 51.715259736   13.64 12.00     ~ 57 0
34 Cl* NGC 6205 SAW V37 SX* 16 41 42.45 +36 28 21.8     17.18   16.92 ~ 6 0
35 Cl* NGC 6205 CGY 6275 RR* 16 41 42.4953 +36 27 31.160     13.18     ~ 11 0
36 2MASS J16414255+3626563 RG* 16 41 42.5493186408 +36 26 56.173428780   13.42 11.94     ~ 38 0
37 NGC 6205 682 * 16 41 43.3895050272 +36 30 18.663491880   15.71 14.93     ~ 3 0
38 Cl* NGC 6205 SAW V36 * 16 41 43.45 +36 26 26.0           ~ 5 0
39 2MASS J16414398+3622338 AB* 16 41 43.9791716280 +36 22 33.652315128   14 12.96     ~ 40 0
40 NGC 6205 717 * 16 41 44.27 +36 28 31.7   15.06 14.95     ~ 4 0
41 NGC 6205 743 * 16 41 45.01 +36 27 04.1     13.70     ~ 5 0
42 NGC 6205 748 * 16 41 45.08 +36 27 37.2           ~ 4 0
43 NGC 6205 765 * 16 41 45.29 +36 29 53.4           ~ 3 0
44 NGC 6205 761 * 16 41 45.4356482640 +36 25 50.362000860   15.07 14.83     ~ 6 0
45 2MASS J16414545+3630114 AB* 16 41 45.4395271368 +36 30 11.313200160   14.21 13.21     G5Ib-II 30 0
46 Cl* NGC 6205 SAW V41 LP* 16 41 45.7042606072 +36 27 57.607470645     13.14     ~ 11 0
47 NGC 6205 807 * 16 41 46.2697739040 +36 28 55.206903684   14.72 14.41     ~ 10 0
48 NGC 6205 806 RR* 16 41 46.2708705096 +36 27 37.997414280   14.91 14.82     ~ 13 1
49 Cl* NGC 6205 SAW V5 RR* 16 41 46.3749846000 +36 27 39.994290900   14.94 14.77     ~ 16 1
50 NGC 6205 816 WV* 16 41 46.4819241696 +36 27 27.821090052   14.53 14.09     A2 38 0
51 2MASS J16414703+3625576 RG* 16 41 47.0167556736 +36 25 57.511404084   13.48 12.03     ~ 40 0
52 Cl* NGC 6205 SAW V6 WV* 16 41 47.9755382448 +36 29 09.747499020   14.63 14.08     F2 33 0
53 NGC 6205 918 RR* 16 41 49.13 +36 27 06.3     14.83     ~ 6 0
54 NGC 6205 917 HS? 16 41 49.2798250320 +36 23 49.299359352           ~ 4 0
55 2MASS J16414970+3627489 RG* 16 41 49.6881218256 +36 27 48.777763752   13.47 12.04     ~ 28 0
56 Cl* NGC 6205 M b * 16 41 49.79 +36 28 20.9           ~ 3 0
57 NGC 6205 956 * 16 41 50.16 +36 28 15.7     13.26     ~ 6 0
58 2MASS J16415024+3629431 AB* 16 41 50.2325407416 +36 29 43.123770636   14.30 13.39     ~ 25 0
59 NGC 6205 973 RG* 16 41 50.9158586208 +36 28 54.352362612   13.65 11.91     ~ 73 0
60 Cl* NGC 6205 ARP 4052 V* 16 41 52.12 +36 26 29.1   14.11 14.02     A5III-IV 17 0
61 NGC 6205 1067 * 16 41 59.3750463840 +36 27 46.008473112   14.83 14.62     ~ 3 0
62 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
63 Cl* NGC 6341 HAC 11 RR* 17 17 13.9825416048 +43 07 05.753459352   15.39 14.99     ~ 15 0
64 NGC 6362 38 ** 17 31 32.03856 -67 02 02.1948       14.722   ~ 8 0
65 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 637 0
66 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0
67 Cl* NGC 6809 SAW V12 RR* 19 39 59.80 -30 58 02.7           ~ 6 0
68 Cl* NGC 6809 SAW V10 RR* 19 40 08.5104580231 -30 54 49.942936350           ~ 6 0
69 Cl* NGC 6809 SAW V9 RR* 19 40 27.3848259936 -30 58 00.033431160     14.19     ~ 7 0
70 Cl* NGC 6362 SAW V6 RR* ~ ~   15.53       ~ 8 0
71 Cl* NGC 6362 SAW V10 RR* ~ ~           ~ 9 0

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