2024MNRAS.532.2159A

Query : 2024MNRAS.532.2159A

2024MNRAS.532.2159A - Mon. Not. R. Astron. Soc., 532, 2159-2173 (2024/August-1)

The variable stars in the field of the bulge cluster NGC 6558.

ARELLANO FERRO A., ZERPA GUILLEN L.J., YEPEZ M.A., BUSTOS FIERRO I.H., PRUDIL Z. and PEREZ PARRA C.E.

Abstract (from CDS):

We made a survey of the variable stars in a 13.2 × 13.2 arcmin$^{2}$ centred on the field of the Galactic bulge cluster NGC 6558. A total of 78 variables were found in the field of the cluster. Many of these variables are included in the catalogue of variable stars in Galactic globular clusters (Clement et al. 2001), OGLE or Gaia DR3 data releases. A membership analysis based on the proper motions of Gaia DR3 revealed that many of these variables do not belong to the cluster. We employed the data from the aforementioned surveys and our own data in the VI photometric system to estimate the periods, which along with the light-curves morphology and position in a deferentially dereddened colour-magnitude diagram (CMD), help classifying the variable types. Two new member variables were found; an eclipsing binary (V18) and a semiregular SR/L (V19). In the end, we conclude that only nine variables are likely cluster members. Member variables were used to discuss the mean metallicity and distance of the parental cluster and find the average values.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): star: horizontal branch - stars: variables: RR Lyrae - stars: fundamental parameters - globular clusters: individual (NGC 6558)

VizieR on-line data: <Available at CDS (J/MNRAS/532/2159): tablea.dat table3.dat>

Simbad objects: 86

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Number of rows : 86
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 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 348 0
2 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 988 1
3 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 203 0
4 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
5 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
6 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 569 0
7 V* V4344 Sgr RR* 18 09 44.8055460024 -31 52 28.884412812   16.45 15.498   14.72 ~ 14 0
8 OGLE BLG-DSCT-08146 dS* 18 09 48.88 -31 53 21.9     17.631   16.829 ~ 2 0
9 V* V4595 Sgr RR* 18 09 50.4645280008 -31 46 37.177630968   16.8 16.569   15.583 ~ 14 0
10 OGLE BLG-ECL-339704 EB* 18 09 52.2670425864 -31 46 30.365329080     18.290   17.112 ~ 4 0
11 [DHM99] BE909 LP* 18 09 53.8644332256 -31 43 25.851998676     15.2     ~ 9 0
12 Cl* NGC 6558 SAW V15 LP* 18 09 54.1640530197 -31 48 10.722097535     14.91     ~ 4 0
13 OGLE BLG-ECL-340840 EB* 18 09 59.6608474491 -31 45 25.925989040     17.956   16.948 ~ 3 0
14 OGLE BLG-ECL-341024 EB* 18 10 01.0960143432 -31 45 44.745463836     16.445   15.659 ~ 5 0
15 OGLE BLG-ECL-341028 EB* 18 10 01.1232534119 -31 47 14.893606341         14.115 ~ 4 0
16 [DHM99] BE998 LP* 18 10 01.6239218448 -31 42 05.305126788     15.27     ~ 4 0
17 OGLE BLG-DSCT-14210 dS* 18 10 03.57 -31 46 07.2     17.624   16.777 ~ 2 0
18 OGLE BLG-ECL-341420 EB* 18 10 03.8491139448 -31 44 41.903839500     18.160   17.302 ~ 4 0
19 OGLE BLG-ECL-341506 EB* 18 10 04.3418670365 -31 48 04.551803956     17.696   16.921 ~ 3 0
20 OGLE BLG-ECL-341526 EB* 18 10 04.46 -31 47 15.0     19.568   18.308 ~ 3 0
21 OGLE BLG-ECL-341544 EB* 18 10 04.6287580920 -31 44 50.901055368     18.429   17.268 ~ 3 0
22 OGLE BLG-RRLYR-14809 RR* 18 10 04.7520673608 -31 40 24.700523412   16.95 16.505   15.561 ~ 8 0
23 OGLE BLG-DSCT-08190 dS* 18 10 04.98 -31 51 12.2     17.083   16.289 ~ 2 0
24 OGLE BLG-ECL-341790 EB* 18 10 06.25 -31 46 09.9     20.043   18.732 ~ 3 0
25 OGLE BLG-ECL-341801 EB* 18 10 06.3458123112 -31 44 48.519302820     19.620   18.286 ~ 3 0
26 OGLE BLG-ECL-341917 EB* 18 10 07.03 -31 42 53.2         19.054 ~ 3 0
27 OGLE BLG-ECL-342132 EB* 18 10 08.34 -31 45 47.3     20.542   19.273 ~ 3 0
28 OGLE BLG-ECL-342151 EB* 18 10 08.4593986776 -31 45 44.700466248     19.818   18.598 ~ 3 0
29 OGLE BLG-ECL-342461 EB* 18 10 10.59 -31 46 10.4     20.156   18.749 ~ 3 0
30 OGLE BLG-ECL-342462 EB* 18 10 10.59 -31 44 24.8     20.481   19.003 ~ 3 0
31 OGLE BLG-ECL-342540 EB* 18 10 11.1000698616 -31 46 19.458458364     18.364   17.315 ~ 4 0
32 OGLE BLG-ECL-342585 EB* 18 10 11.4857572416 -31 48 48.431085480     19.833   16.994 ~ 3 0
33 Gaia DR3 4048863608355972480 * 18 10 11.8750199245 -31 48 22.348089944           ~ 1 0
34 OGLE BLG-ECL-342710 EB* 18 10 12.5015235528 -31 47 33.652992264     19.323   18.169 ~ 5 0
35 OGLE BLG-ECL-342716 EB* 18 10 12.5473283064 -31 45 53.499505788     18.811   17.540 ~ 3 0
36 OGLE BLG-ECL-342853 EB* 18 10 13.2514721880 -31 45 22.841683596     18.961   17.337 ~ 3 0
37 Cl* NGC 6558 SAW V4 RR* 18 10 13.27 -31 46 16.0   17.7 16.286 16.07 15.486 ~ 14 0
38 V* V4301 Sgr RR* 18 10 13.4841609576 -31 43 45.074265780   17.7 16.892 16.38 15.591 ~ 22 0
39 OGLE BLG-ECL-342957 EB* 18 10 13.9976068536 -31 44 19.260213612     18.497   17.620 ~ 3 0
40 OGLE BLG-RRLYR-14873 RR* 18 10 14.2201964016 -31 45 08.179438356     16.724 16.21 15.503 ~ 11 0
41 Cl* NGC 6558 SAW V1 RR* 18 10 15.5937773299 -31 45 54.035188703   16.5 16.562 16.10 15.614 ~ 18 0
42 OGLE BLG-ECL-343193 EB* 18 10 15.8295586584 -31 47 49.826785200     18.663   17.383 ~ 3 0
43 [BB97c] E2 RR* 18 10 15.8792580168 -31 46 41.387653272   16.9 16.500   15.599 ~ 11 0
44 OGLE BLG-RRLYR-14892 RR* 18 10 16.2146516976 -31 45 42.251799492     16.294   15.22 ~ 16 0
45 [DHM99] BE1171 LP? 18 10 16.2591026712 -31 45 03.351835044     13.6     ~ 5 0
46 OGLE BLG-ECL-343374 EB* 18 10 17.0587888944 -31 49 05.804937984     19.127   18.030 ~ 4 0
47 OGLE BLG-DSCT-08222 dS* 18 10 17.53 -31 45 50.5     17.897   16.602 ~ 2 0
48 NGC 6558 GlC 18 10 17.6 -31 45 50           ~ 265 0
49 Cl* NGC 6558 BZO F42 LP? 18 10 17.6656457016 -31 45 39.339024012     13.9   11.442 ~ 12 0
50 V* V4601 Sgr RR* 18 10 17.8654315995 -31 48 55.242936014   16.9 16.365 16.08 15.415 ~ 20 0
51 OGLE BLG-ECL-343590 EB* 18 10 18.51 -31 46 45.1         18.784 ~ 3 0
52 OGLE BLG-ECL-343705 EB* 18 10 19.3994083680 -31 47 40.849684692     18.123   17.157 ~ 4 0
53 Cl* NGC 6558 SAW V16 RR* 18 10 19.6265341033 -31 46 05.879426134     16.530 16.09 15.384 ~ 14 0
54 OGLE BLG-ECL-343910 EB* 18 10 20.8408621224 -31 47 18.037979412     19.568   18.468 ~ 3 0
55 OGLE BLG-ECL-343918 EB* 18 10 20.9281469328 -31 44 35.605623228     15.780   14.948 ~ 3 0
56 Cl* NGC 6558 SAW V3 RR* 18 10 21.6432107016 -31 45 15.465262428   16.6 16.342 16.03 15.334 ~ 14 0
57 OGLE BLG-ECL-344196 EB* 18 10 22.80 -31 44 23.9     19.979   18.724 ~ 3 0
58 OGLE BLG-ELL-21823 El* 18 10 22.82 -31 47 55.7     16.861   15.363 ~ 3 0
59 OGLE BLG-ECL-344354 EB* 18 10 23.9145398736 -31 45 43.041525156     19.189   17.858 ~ 3 0
60 OGLE BLG-ECL-344368 EB* 18 10 24.06 -31 41 41.5     18.072   16.942 ~ 3 0
61 [TGB2011] J181024.0994-314608.814 EB* 18 10 24.0946712832 -31 46 08.762905812     14.5   13.345 ~ 5 0
62 [TGB2011] J181024.5663-314517.415 El* 18 10 24.5597064144 -31 45 17.430071544     14.9   13.882 ~ 5 0
63 OGLE BLG-ECL-344488 EB* 18 10 24.9477753969 -31 47 08.130023499     18.932   17.991 ~ 3 0
64 OGLE BLG-ECL-344503 EB* 18 10 25.0976980608 -31 43 12.622186848     20.141   18.288 ~ 3 0
65 OGLE BLG-ECL-344522 EB* 18 10 25.2522051744 -31 48 51.023566368     19.563   18.334 ~ 3 0
66 [TGB2011] J181025.6263-314332.893 * 18 10 25.6263 -31 43 32.902     14.7     ~ 2 0
67 Gaia DR3 4048866155360747776 * 18 10 25.6694946679 -31 41 59.050292268           ~ 1 0
68 Cl* NGC 6558 SAW V7 V* 18 10 25.8 -31 43 30           ~ 2 0
69 OGLE BLG-ECL-344792 EB* 18 10 27.1561991616 -31 49 02.469963396     20.202   18.797 ~ 3 0
70 OGLE BLG-ECL-344831 EB* 18 10 27.4829105664 -31 44 53.372786604     17.472   16.509 ~ 5 0
71 OGLE BLG-ECL-345018 EB* 18 10 28.6146946800 -31 45 40.393432404     19.198   17.835 ~ 3 0
72 OGLE BLG-ELL-21862 El* 18 10 29.1755579083 -31 46 54.219513939     19.063   17.809 ~ 5 0
73 OGLE BLG-ECL-345114 EB* 18 10 29.36 -31 46 56.1     20.477   19.083 ~ 3 0
74 OGLE BLG-LPV-222701 LP* 18 10 30.4498857984 -31 46 34.527385740     17.154   13.233 ~ 4 0
75 OGLE BLG-ECL-345391 EB* 18 10 31.2321062016 -31 41 26.823400080         16.942 ~ 4 0
76 OGLE BLG-ECL-345412 EB* 18 10 31.4219701128 -31 47 02.787059868     17.511   16.521 ~ 4 0
77 OGLE BLG-ECL-345522 EB* 18 10 32.0311429896 -31 47 06.952904700     20.267   18.415 ~ 3 0
78 OGLE BLG-ECL-345774 EB* 18 10 33.8147340264 -31 47 53.626658172     18.777   17.608 ~ 3 0
79 OGLE BLG-ECL-346064 EB* 18 10 35.6817451920 -31 45 25.985330532     18.204   17.131 ~ 3 0
80 OGLE BLG-ECL-346111 EB* 18 10 35.9671970784 -31 40 13.912090968     16.164   15.284 ~ 5 0
81 [DHM99] BE1432 LP* 18 10 36.2599375608 -31 45 31.195667124     14.2     ~ 5 0
82 OGLE BLG-ECL-346668 EB* 18 10 39.6064891656 -31 41 21.762780108         16.889 ~ 3 0
83 OGLE BLG-ECL-346847 EB* 18 10 40.9949950512 -31 39 48.249491112     16.688   15.737 ~ 4 0
84 OGLE BLG-RRLYR-15057 RR* 18 10 45.7613625595 -31 46 20.144003257   16.9 16.437   15.501 ~ 10 0
85 OGLE BLG-DSCT-14242 dS* 18 10 46.56 -31 40 52.7     17.853   17.059 ~ 2 0
86 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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