2024AJ....168....8N

Query : 2024AJ....168....8N

2024AJ....168....8N - Astron. J., 168, 8 (2024/July-0)

Discovery of RR Lyrae in the Ultra-faint-dwarf Galaxy Virgo III.

NGEOW C.-C. and BHARDWAJ A.

Abstract (from CDS):

Virgo III is a newly discovered ultra-faint-dwarf (UFD) candidate, and finding RR Lyrae associated with this galaxy is important to constrain its distance. In this work, we present a search of RR Lyrae in the vicinity of Virgo III based on the time-series r-band images taken from the Lulin One-meter Telescope (LOT). We have identified three RR Lyrae from our LOT data, including two fundamental mode (ab-type) and a first-overtone (c-type) RR Lyrae. Assuming these three RR Lyrae are members of Virgo III, we derived the distance to this UFD as 154 ± 25 kpc, fully consistent with the independent measurements given in the literature. We have also revisited the relation between absolute V-band magnitude (MV) and the number of RR Lyrae (of all types, NRRL) found in local galaxies, demonstrating that the MV-NRRL relation is better described with the specific RR Lyrae frequency.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): RR Lyrae variable stars - Dwarf galaxies

Simbad objects: 102

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Number of rows : 102
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 NAME Tuc IV G 00 02.9 -60 51           ~ 90 0
3 ESO 410-5 LSB 00 15 31.21 -32 10 49.9   15.32 14.9 14.58   ~ 120 1
4 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
5 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
6 ESO 294-10 AG? 00 26 33.37 -41 51 19.1   15.76 15.3 14.97   ~ 122 2
7 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
8 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
9 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
10 NAME Andromeda XXVII G 00 37 27.1 +45 23 13     16.7     ~ 82 0
11 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
12 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
13 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
14 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
15 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
16 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
17 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
18 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
19 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
20 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
21 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
22 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
23 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
24 NAME Cetus II G 01 17.9 -17 25           ~ 56 0
25 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
26 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
27 DELVE 2 Cl* 01 55 05 -68 15.2     17.16     ~ 20 0
28 NAME Cetus III Dwarf Galaxy LSB 02 05 19.40 -04 16 12.0           ~ 32 0
29 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
30 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
31 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
32 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
33 NAME Hydrus I G 02 29 33.4 -79 18 32           ~ 80 0
34 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
35 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
36 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
37 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 76 0
38 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
39 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
40 NAME Reticulum III G 03 45.4 -60 27           ~ 67 0
41 NAME Eridanus IV G 05 05 45 -09 30.9     14.72     ~ 15 0
42 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
43 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
44 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
45 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
46 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
47 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
48 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
49 NAME Antlia II Dwarf Galaxy G 09 35 32.8 -36 46 02           ~ 109 0
50 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
51 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
52 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
53 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
54 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 268 0
55 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
56 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
57 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
58 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
59 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
60 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
61 NAME Vir I Dwarf Galaxy LSB 12 00 09.6 -00 40 48           ~ 40 0
62 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
63 SDSS J122522.66+042526.8 RR? 12 25 22.669 +04 25 26.87           ~ 1 0
64 NAME Virgo III Dwarf Galaxy LSB 12 25 24 +04 27.0           ~ 6 0
65 SDSS J122526.44+042521.1 RR? 12 25 26.445 +04 25 21.12           ~ 1 0
66 SDSS J122536.38+042606.5 RR? 12 25 36.381 +04 26 06.55           ~ 1 0
67 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
68 NAME Centaurus I G 12 38 20 -40 54.1     14.78     ~ 29 0
69 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
70 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
71 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
72 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
73 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
74 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
75 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
76 LEDA 2801026 LSB 16 13 47.504 +54 22 08.25     15.9     ~ 115 0
77 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
78 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
79 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
80 NAME Orphan Stream St* 19 09 -23.           ~ 281 0
81 V* RR Lyr RR* 19 25 27.9129605304 +42 47 03.693258204   7.36   7.6   kA3hF0 951 0
82 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
83 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
84 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
85 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
86 NAME Chenab Stream St* 21 17 -59.9           ~ 45 0
87 NAME Segue 3 Cl* 21 21 31.0 +19 07 02           ~ 75 0
88 NAME Pegasus IV G 21 54 09 +26 37.2           ~ 15 0
89 NAME Gru II G 22 04.1 -46 26           ~ 110 0
90 NAME Pegasus III LSB 22 24 22.6 +05 25 12           ~ 69 0
91 NAME Andromeda XXVIII G 22 32 41.20 +31 12 58.2     15.6     ~ 88 0
92 NAME Aquarius 2 G 22 33 55.5 -09 19 39           ~ 66 0
93 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
94 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
95 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
96 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
97 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
98 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
99 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
100 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
101 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
102 NAME Tuc III G 23 56.6 -59 36           ~ 229 0

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