2021AJ....161..120M

Query : 2021AJ....161..120M

2021AJ....161..120M - Astron. J., 161, 120-120 (2021/March-0)

Short-period variability in the globular cluster NGC 419 and the SMC field.

MARTINEZ-VAZQUEZ C.E., SALINAS R. and VIVAS A.K.

Abstract (from CDS):

Delta Scuti (δ Sct) stars have been extensively studied in our Galaxy but far less in extragalactic systems. Here we study the population of δ Sct variables in NGC 419, an intermediate-age globular cluster of the Small Magellanic Cloud (SMC), using g, r, and i Gemini-S/Gemini Multi-Object Spectrograph (GMOS) time-series observations. Our goal is to study the role of such variables in the cluster extended main-sequence turnoff (MSTO). We report the discovery of 54 δ Sct stars and three eclipsing binaries in the NGC 419 field. We find only a handful of the δ Sct stars at the MSTO of NGC 419, while the majority are fainter, indicating that the cluster is younger (<=1.2 Gyr) than previously thought. Considering their radial distribution, we identify only six δ Sct stars as probable members of NGC 419, while the 48 remaining are likely δ Sct stars of the SMC field. Cluster δ Sct stars appear close to the red edge of the MSTO, supporting the idea that the extended MSTO has its origin in an age spread. The 48 field δ Sct stars represent the largest detection of δ Sct stars made in the SMC. The period distribution of these newly detected δ Sct stars (0.04 day <= P <= 0.15 day) is similar to that detected in other systems. The amplitude distribution (0.05 mag <= Δr <= 0.60 mag) is likely biased because of the lack of low-amplitude stars. We finally use the δ Sct stars to calculate distances using different period-luminosity relations. The average distance moduli obtained are 18.76 ± 0.14 mag for NGC 419 and 18.86 ± 0.11 mag for the SMC field, which agree with previous measurements.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Globular star clusters - Delta Scuti variable stars - Small Magellanic Cloud - Variable stars

VizieR on-line data: <Available at CDS (J/AJ/161/120): table3.dat table4.dat>

Nomenclature: Table 3: [MSV2021] VNN (Nos V1-V73).

Simbad objects: 85

goto Full paper

goto View the references in ADS

Number of rows : 85
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 OGLE SMC-RRLYR-1047 RR* 00 50 08.48 -72 59 16.9     18.782   18.792 ~ 5 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 OGLE SMC-CEP-1982 cC* 00 52 59.5723241880 -72 56 05.664930684     18.754   18.208 ~ 7 0
5 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
6 [MSV2021] V1 dS* 01 07 42.580 -72 50 51.09           ~ 1 0
7 [MSV2021] V2 dS* 01 07 42.862 -72 53 00.23           ~ 1 0
8 [MSV2021] V3 dS* 01 07 43.831 -72 53 05.83           ~ 1 0
9 OGLE SMC-SC11 38611 EB* 01 07 44.8286683176 -72 51 56.527861896   17.65 17.73   17.70 ~ 7 0
10 [MSV2021] V5 dS* 01 07 45.372 -72 54 45.96           ~ 1 0
11 [MSV2021] V6 dS* 01 07 45.533 -72 52 20.05           ~ 1 0
12 [MSV2021] V7 dS* 01 07 46.116 -72 53 24.87           ~ 1 0
13 [MSV2021] V8 dS* 01 07 46.456 -72 55 39.18           ~ 1 0
14 [MSV2021] V9 dS* 01 07 50.227 -72 54 27.45           ~ 1 0
15 [MSV2021] V10 dS* 01 07 50.304 -72 55 42.97           ~ 1 0
16 OGLE SMC-CEP-3982 cC* 01 07 50.4844295352 -72 50 52.979277768   16.800 16.262   15.535 ~ 8 0
17 [MSV2021] V12 dS* 01 07 50.529 -72 54 51.23           ~ 1 0
18 [MSV2021] V13 dS* 01 07 50.716 -72 54 58.38           ~ 1 0
19 [MSV2021] V14 dS* 01 07 51.010 -72 53 55.29           ~ 1 0
20 OGLE SMC-ECL- 5317 EB* 01 07 51.7427808936 -72 52 45.218288100     17.259   17.250 ~ 4 0
21 OGLE SMC-SC11 68552 EB* 01 07 51.8187272406 -72 53 41.846318776     18.59   18.47 ~ 7 0
22 [MSV2021] V17 dS* 01 07 52.187 -72 53 28.81           ~ 1 0
23 [MSV2021] V18 dS* 01 07 52.215 -72 53 55.63           ~ 1 0
24 [MSV2021] V19 dS* 01 07 52.260 -72 54 35.39           ~ 1 0
25 [MSV2021] V20 dS* 01 07 52.616 -72 53 24.21           ~ 1 0
26 [MSV2021] V21 dS* 01 07 52.809 -72 50 23.00           ~ 1 0
27 [MSV2021] V22 dS* 01 07 53.104 -72 50 58.39           ~ 1 0
28 [MSV2021] V23 dS* 01 07 53.770 -72 53 07.46           ~ 1 0
29 [MSV2021] V24 dS* 01 07 53.948 -72 55 11.74           ~ 1 0
30 [MSV2021] V25 dS* 01 07 56.188 -72 53 34.92           ~ 1 0
31 [MSV2021] V26 dS* 01 08 02.877 -72 55 08.37           ~ 1 0
32 [MSV2021] V27 dS* 01 08 02.893 -72 54 23.09           ~ 1 0
33 [MSV2021] V28 dS* 01 08 03.252 -72 51 05.42           ~ 1 0
34 [MSV2021] V29 dS* 01 08 03.268 -72 55 31.03           ~ 1 0
35 [MSV2021] V30 dS* 01 08 03.575 -72 52 53.85           ~ 1 0
36 [MSV2021] V31 dS* 01 08 05.494 -72 55 25.28           ~ 1 0
37 [MSV2021] V32 dS* 01 08 05.632 -72 54 44.54           ~ 1 0
38 OGLE SMC-CEP-4008 cC* 01 08 07.2309820704 -72 55 39.108350460     17.267   16.698 ~ 8 0
39 [MSV2021] V34 EB* 01 08 07.265 -72 55 03.99           ~ 1 0
40 [MSV2021] V35 dS* 01 08 11.922 -72 50 58.18           ~ 1 0
41 [MSV2021] V36 EB* 01 08 12.192 -72 55 44.41           ~ 1 0
42 [MSV2021] V37 dS* 01 08 12.428 -72 54 30.04           ~ 1 0
43 [MSV2021] V38 dS* 01 08 12.714 -72 51 06.73           ~ 1 0
44 [MSV2021] V39 dS* 01 08 13.310 -72 55 11.86           ~ 1 0
45 OGLE SMC-CEP-4027 cC* 01 08 16.7991281328 -72 50 20.144834124   18.029 17.775   17.277 ~ 6 0
46 OGLE SMC-CEP-4028 cC* 01 08 17.17 -72 53 07.3     17.366   16.653 ~ 6 0
47 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 287 0
48 OGLE SMC-CEP-4032 cC* 01 08 19.43 -72 52 47.7     17.760   17.193 ~ 4 0
49 OGLE SMC-ECL- 7769 EB* 01 08 20.67 -72 52 44.5     18.291   17.250 ~ 3 0
50 [MSV2021] V44 dS* 01 08 23.878 -72 50 54.82           ~ 1 0
51 [MSV2021] V45 dS* 01 08 23.883 -72 51 03.40           ~ 1 0
52 OGLE SMC726.19.024919 dS* 01 08 24.94 -72 51 09.8     20.739   20.058 ~ 2 0
53 [MSV2021] V47 dS* 01 08 25.413 -72 53 41.65           ~ 1 0
54 OGLE SMC-SC11 71439 EB* 01 08 25.421 -72 53 21.62     19.578   19.704 ~ 4 0
55 SV* HV 2062 cC* 01 08 25.4670762336 -72 51 53.910527256   16.875 16.250   15.488 ~ 10 0
56 [MSV2021] V50 dS* 01 08 26.616 -72 53 39.71           ~ 1 0
57 [MSV2021] V51 dS* 01 08 27.697 -72 53 35.85           ~ 1 0
58 [MSV2021] V52 dS* 01 08 29.883 -72 53 27.83           ~ 1 0
59 [MSV2021] V53 dS* 01 08 30.297 -72 53 30.23           ~ 1 0
60 OGLE SMC-CEP-4045 cC* 01 08 30.4105528464 -72 54 07.806445704     17.613   17.014 ~ 7 0
61 [MSV2021] V55 dS* 01 08 30.929 -72 50 44.56           ~ 1 0
62 [MSV2021] V56 dS* 01 08 38.538 -72 53 30.65           ~ 1 0
63 [MSV2021] V57 dS* 01 08 39.478 -72 54 41.32           ~ 1 0
64 [MSV2021] V58 dS* 01 08 40.996 -72 53 27.56           ~ 1 0
65 [MSV2021] V59 dS* 01 08 41.052 -72 55 26.35           ~ 1 0
66 OGLE SMC-CEP-4055 cC* 01 08 42.0310672848 -72 51 21.771504000     16.399   15.827 ~ 8 0
67 [MSV2021] V61 dS* 01 08 42.852 -72 55 28.69           ~ 1 0
68 OGLE SMC-CEP-4062 cC* 01 08 44.7243585240 -72 53 40.692644952   17.345 16.935   16.258 ~ 9 0
69 [MSV2021] V63 dS* 01 08 45.892 -72 54 51.01           ~ 1 0
70 [MSV2021] V64 dS* 01 08 47.446 -72 53 29.97           ~ 1 0
71 [MSV2021] V65 dS* 01 08 48.251 -72 53 36.57           ~ 1 0
72 [MSV2021] V66 dS* 01 08 48.733 -72 51 37.45           ~ 1 0
73 [MSV2021] V67 dS* 01 08 49.987 -72 51 40.83           ~ 1 0
74 OGLE SMC-ECL- 5433 EB* 01 08 50.0657347944 -72 52 15.865033440     18.925   18.893 ~ 4 0
75 [MSV2021] V69 dS* 01 08 50.500 -72 50 32.33           ~ 1 0
76 OGLE SMC-CEP-4068 cC* 01 08 51.8143365000 -72 54 54.280202292   16.560 16.159   15.547 ~ 9 0
77 [MSV2021] V71 EB* 01 08 52.787 -72 53 09.53           ~ 1 0
78 [MSV2021] V72 dS* 01 08 53.503 -72 53 53.60           ~ 1 0
79 [MSV2021] V73 dS* 01 08 54.512 -72 55 00.09           ~ 1 0
80 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
81 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
82 NGC 1846 Cl* 05 07 34.900 -67 27 32.45   12.08 11.31     ~ 231 0
83 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
84 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
85 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0

To bookmark this query, right click on this link: simbad:objects in 2021AJ....161..120M and select 'bookmark this link' or equivalent in the popup menu