2000AJ....120..284S


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.06CEST05:58:38

2000AJ....120..284S - Astron. J., 120, 284-297 (2000/July-0)

Exploring the Leo II dwarf spheroidal galaxy. I. The variable star content.

SIEGEL M.H. and MAJEWSKI S.R.

Abstract (from CDS):

We present the first comprehensive catalog of variable stars in the Leo II dwarf spheroidal galaxy. We have identified 148 RR Lyrae type variables, of which 140 were amenable to derivation of variability parameters with our data. We have also confirmed the existence of four anomalous Cepheids as identified in previous studies. The average period of the RR Lyrae ab variables (0.62 days), the fraction of c variables (0.24), and the minimum period of the RR Lyrae ab variables (0.51 days) all define Leo II as an ``Oosterhoff intermediate'' galaxy. We have used the properties of these variables to derive a metallicity for Leo II of approximately [Fe/H]=-1.9. We attempt to resolve discrepancies between this value and those determined by previous efforts. The presence of longer period, higher amplitude RR Lyrae variables implies a metallicity distribution that extends to as poor as [Fe/H]=-2.3. Leo II's location on the period-metallicity relation of clusters, like that of other ``Oosterhoff intermediate'' objects, falls between the Oosterhoff class I and Oosterhoff class II clusters. The properties of the variable populations of these objects are consistent with the idea that the Oosterhoff ``dichotomy'' is a continuum. The gap between the classes seems to be explained by the horizontal branch of Galactic globular clusters shifting away from the instability strip at intermediate metallicities. However, Leo II, as well as other Oosterhoff intermediate objects, has a second-parameter effect strong enough to leave horizontal-branch stars in the instability strip.

Abstract Copyright:

Journal keyword(s): Galaxies: Dwarf - Galaxies: Individual: Name: Leo II - Galaxies: Stellar Content - Stars: Variables: General

VizieR on-line data: <Available at CDS (J/AJ/120/284): table1.dat table2.dat table4.dat table5.dat>

Nomenclature: Tables 1-2: [SM2000] VNNN N=152 among (Nos V1-V171). Tables 1, 3, 5: [SM2000] NNNN N=173 among (Nos 645-5673).

Simbad objects: 183

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Number of rows : 183

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Cl Lindsay 1 Cl* 00 03 54 -73 28.3   11.7       ~ 99 0
2 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1167 4
3 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 476 2
4 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1533 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15333 1
6 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1024 0
7 NAME Leo I dSph G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1086 1
8 NAME Dwarf Elliptical Galaxy in Sex G 10 13 02.9 -01 36 53   12 10.4     ~ 741 0
9 [SM2000] V127 RR* 11 13 03.71 +22 05 51.8           ~ 1 0
10 [SM2000] V131 RR* 11 13 06.56 +22 02 41.1           ~ 1 0
11 [SM2000] V107 RR* 11 13 07.32 +22 07 02.3           ~ 1 0
12 [SM2000] V81 RR* 11 13 07.99 +22 08 40.7           ~ 1 0
13 [SM2000] V167 RR* 11 13 08.79 +22 11 16.3           ~ 1 0
14 Swope V203 Ce* 11 13 09.58 +22 10 26.3     20.59     ~ 5 0
15 [SM2000] V152 RR* 11 13 10.49 +22 07 59.2           ~ 1 0
16 [SM2000] V146 RR* 11 13 10.54 +22 04 10.3           ~ 1 0
17 [SM2000] V76 RR* 11 13 10.62 +22 07 47.1           ~ 1 0
18 [SM2000] V77 RR* 11 13 10.70 +22 07 43.8           ~ 1 0
19 [SM2000] V163 RR* 11 13 11.63 +22 10 37.2           ~ 1 0
20 [SM2000] V134 RR* 11 13 11.72 +22 08 54.0           ~ 1 0
21 [SM2000] V85 RR* 11 13 11.76 +22 09 13.9           ~ 1 0
22 [SM2000] V169 RR* 11 13 11.79 +22 11 15.5           ~ 1 0
23 [SM2000] V62 RR* 11 13 12.35 +22 08 44.4           ~ 1 0
24 [SM2000] V141 RR* 11 13 12.49 +22 04 50.4           ~ 1 0
25 [SM2000] V153 RR* 11 13 13.11 +22 06 31.2           ~ 1 0
26 [SM2000] V73 RR* 11 13 13.22 +22 07 48.7           ~ 1 0
27 [SM2000] V94 RR* 11 13 13.55 +22 05 53.4           ~ 1 0
28 Swope V51 Ce* 11 13 14.54 +22 11 41.6     21.59     ~ 5 0
29 [SM2000] V112 RR* 11 13 14.64 +22 09 38.2           ~ 1 0
30 [SM2000] V91 RR* 11 13 15.20 +22 04 26.6           ~ 1 0
31 [SM2000] V102 RR* 11 13 15.43 +22 10 09.7           ~ 1 0
32 [SM2000] V120 RR* 11 13 15.84 +22 12 59.7           ~ 1 0
33 [SM2000] V92 RR* 11 13 16.10 +22 03 55.2           ~ 1 0
34 [SM2000] V50 RR* 11 13 16.78 +22 09 08.6           ~ 1 0
35 [SM2000] V22 RR* 11 13 16.90 +22 11 36.6           ~ 1 0
36 [SM2000] V57 RR* 11 13 17.33 +22 08 43.8           ~ 1 0
37 [SM2000] V67 RR* 11 13 17.38 +22 07 54.3           ~ 1 0
38 [SM2000] V149 RR* 11 13 17.59 +22 03 32.8           ~ 1 0
39 [SM2000] V100 RR* 11 13 18.04 +22 07 58.8           ~ 1 0
40 [SM2000] V40 RR* 11 13 18.29 +22 09 38.4           ~ 1 0
41 [SM2000] V161 RR* 11 13 18.78 +22 08 12.5           ~ 1 0
42 [SM2000] V34 RR* 11 13 18.82 +22 09 57.0           ~ 1 0
43 [SM2000] V160 RR* 11 13 18.88 +22 05 50.7           ~ 1 0
44 [SM2000] V96 RR* 11 13 19.34 +22 07 55.6           ~ 1 0
45 [SM2000] V49 RR* 11 13 19.43 +22 08 59.4           ~ 1 0
46 [SM2000] V32 RR* 11 13 19.63 +22 09 55.9           ~ 1 0
47 [SM2000] V18 RR* 11 13 19.63 +22 11 46.2           ~ 1 0
48 [SM2000] V130 RR* 11 13 19.76 +22 06 16.2           ~ 1 0
49 [SM2000] V147 RR* 11 13 20.15 +22 05 44.6           ~ 1 0
50 [SM2000] V78 RR* 11 13 20.34 +22 07 00.0           ~ 1 0
51 [SM2000] V25 RR* 11 13 20.36 +22 11 10.3           ~ 1 0
52 [SM2000] V126 RR* 11 13 20.53 +22 07 13.3           ~ 1 0
53 [SM2000] V10 RR* 11 13 20.75 +22 12 02.0           ~ 1 0
54 [SM2000] V103 RR* 11 13 21.09 +22 11 14.8           ~ 1 0
55 [SM2000] V106 RR* 11 13 21.18 +22 10 59.2           ~ 1 0
56 [SM2000] V64 RR* 11 13 21.44 +22 07 54.2           ~ 1 0
57 [SM2000] V168 RR* 11 13 21.62 +22 07 32.4           ~ 1 0
58 [SM2000] V156 RR* 11 13 21.68 +22 12 57.0           ~ 1 0
59 [SM2000] V148 RR* 11 13 22.04 +22 10 54.7           ~ 1 0
60 [SM2000] V109 RR* 11 13 22.05 +22 11 29.5           ~ 1 0
61 [SM2000] V165 RR* 11 13 22.33 +22 06 18.2           ~ 1 0
62 Swope V27 Ce* 11 13 22.35 +22 08 34.5     20.45     ~ 6 0
63 [SM2000] V1 RR* 11 13 23.36 +22 12 56.5           ~ 2 0
64 [SM2000] V145 RR* 11 13 23.40 +22 06 11.7           ~ 1 0
65 [SM2000] V52 RR* 11 13 23.49 +22 08 35.1           ~ 1 0
66 [SM2000] V90 RR* 11 13 23.76 +22 15 28.2           ~ 1 0
67 [SM2000] V166 RR* 11 13 24.30 +22 11 12.7           ~ 1 0
68 [SM2000] V24 RR* 11 13 24.46 +22 10 53.0           ~ 1 0
69 [SM2000] V48 RR* 11 13 24.68 +22 08 37.9           ~ 1 0
70 [SM2000] V119 RR* 11 13 24.90 +22 11 02.5           ~ 1 0
71 [SM2000] V14 RR* 11 13 25.80 +22 11 38.0           ~ 1 0
72 [SM2000] V36 RR* 11 13 26.43 +22 09 14.0           ~ 1 0
73 [SM2000] V37 RR* 11 13 26.46 +22 09 11.3           ~ 1 0
74 [SM2000] V38 RR* 11 13 27.06 +22 09 05.0           ~ 1 0
75 [SM2000] V60 RR* 11 13 27.22 +22 07 51.8           ~ 1 0
76 [SM2000] V70 RR* 11 13 27.33 +22 06 56.8           ~ 1 0
77 [SM2000] V74 RR* 11 13 27.42 +22 06 39.2           ~ 1 0
78 [SM2000] V82 RR* 11 13 27.46 +22 07 27.7           ~ 1 0
79 [SM2000] V55 RR* 11 13 27.61 +22 08 06.6           ~ 1 0
80 [SM2000] V154 RR* 11 13 27.63 +22 07 37.0           ~ 1 0
81 [SM2000] V9 RR* 11 13 27.92 +22 11 43.3           ~ 1 0
82 NAME Leo B G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 761 0
83 [SM2000] V33 RR* 11 13 28.22 +22 09 17.8           ~ 1 0
84 [SM2000] V111 RR* 11 13 28.25 +22 07 08.2           ~ 1 0
85 [SM2000] V122 RR* 11 13 28.43 +22 04 49.6           ~ 1 0
86 [SM2000] V56 RR* 11 13 28.52 +22 08 01.5           ~ 1 0
87 [SM2000] V159 RR* 11 13 28.80 +22 12 35.5           ~ 1 0
88 [SM2000] V41 RR* 11 13 29.06 +22 08 48.6           ~ 1 0
89 [SM2000] V61 RR* 11 13 29.18 +22 07 34.6           ~ 1 0
90 [SM2000] V79 RR* 11 13 29.42 +22 06 08.9           ~ 1 0
91 [SM2000] V115 RR* 11 13 29.42 +22 08 23.6           ~ 1 0
92 [SM2000] V11 RR* 11 13 29.65 +22 11 23.4           ~ 1 0
93 [SM2000] V129 RR* 11 13 30.03 +22 05 22.6           ~ 1 0
94 [SM2000] V116 RR* 11 13 30.10 +22 01 49.9           ~ 1 0
95 [SM2000] V46 RR* 11 13 30.18 +22 08 17.0           ~ 1 0
96 [SM2000] V65 RR* 11 13 30.42 +22 07 12.6           ~ 1 0
97 [SM2000] V128 RR* 11 13 30.67 +22 09 12.5           ~ 1 0
98 [SM2000] V30 RR* 11 13 30.71 +22 09 17.3           ~ 1 0
99 [SM2000] V75 RR* 11 13 31.50 +22 06 16.6           ~ 1 0
100 [SM2000] V15 RR* 11 13 31.82 +22 11 10.6           ~ 1 0
101 [SM2000] V137 RR* 11 13 32.00 +22 10 50.2           ~ 1 0
102 [SM2000] V2 RR* 11 13 32.25 +22 12 13.1           ~ 1 0
103 [SM2000] V29 RR* 11 13 32.27 +22 09 27.8           ~ 1 0
104 [SM2000] V157 RR* 11 13 32.38 +22 07 20.5           ~ 1 0
105 [SM2000] V43 RR* 11 13 32.61 +22 08 17.2           ~ 1 0
106 [SM2000] V54 RR* 11 13 32.64 +22 07 48.3           ~ 1 0
107 [SM2000] V28 RR* 11 13 32.64 +22 09 33.2           ~ 1 0
108 [SM2000] V8 RR* 11 13 32.68 +22 11 29.5           ~ 1 0
109 [SM2000] V39 RR* 11 13 33.00 +22 08 35.9           ~ 1 0
110 [SM2000] V113 RR* 11 13 33.23 +22 12 45.3           ~ 1 0
111 [SM2000] V87 RR* 11 13 33.26 +22 10 23.6           ~ 1 0
112 [SM2000] V105 RR* 11 13 33.61 +22 04 11.7           ~ 1 0
113 [SM2000] V19 RR* 11 13 34.28 +22 10 37.0           ~ 1 0
114 [SM2000] V136 RR* 11 13 34.75 +22 07 44.2           ~ 1 0
115 Swope V1 Ce* 11 13 34.75 +22 13 44.8     21.97     ~ 4 0
116 [SM2000] V80 RR* 11 13 34.82 +22 05 33.7           ~ 1 0
117 [SM2000] V44 RR* 11 13 34.95 +22 07 59.2           ~ 1 0
118 [SM2000] V117 RR* 11 13 35.27 +22 07 34.5           ~ 1 0
119 [SM2000] V69 RR* 11 13 35.74 +22 06 23.9           ~ 1 0
120 [SM2000] V16 RR* 11 13 35.79 +22 10 53.0           ~ 1 0
121 [SM2000] V31 RR* 11 13 35.88 +22 08 47.6           ~ 1 0
122 [SM2000] V83 RR* 11 13 36.13 +22 15 51.1           ~ 1 0
123 [SM2000] V132 RR* 11 13 36.35 +22 09 04.3           ~ 1 0
124 [SM2000] V121 RR* 11 13 36.99 +22 08 59.5           ~ 1 0
125 [SM2000] V155 RR* 11 13 37.02 +22 10 09.5           ~ 1 0
126 [SM2000] V99 RR* 11 13 37.13 +22 13 44.0           ~ 1 0
127 [SM2000] V158 RR* 11 13 37.75 +22 09 35.5           ~ 1 0
128 [SM2000] V140 RR* 11 13 38.01 +22 06 10.5           ~ 1 0
129 [SM2000] V21 RR* 11 13 38.10 +22 10 11.8           ~ 1 0
130 [SM2000] V5 RR* 11 13 39.17 +22 11 21.7           ~ 1 0
131 [SM2000] V95 RR* 11 13 39.20 +22 07 15.4           ~ 1 0
132 [SM2000] V139 RR* 11 13 39.59 +22 12 06.3           ~ 1 0
133 [SM2000] V125 RR* 11 13 39.67 +22 11 59.1           ~ 1 0
134 [SM2000] V98 RR* 11 13 39.79 +22 07 45.7           ~ 1 0
135 [SM2000] V142 RR* 11 13 40.13 +22 10 37.0           ~ 1 0
136 [SM2000] V133 RR* 11 13 40.16 +22 06 16.4           ~ 1 0
137 [SM2000] V97 RR* 11 13 40.25 +22 07 43.3           ~ 1 0
138 [SM2000] V104 RR* 11 13 40.42 +22 08 34.6           ~ 1 0
139 [SM2000] V118 RR* 11 13 40.84 +22 04 01.1           ~ 1 0
140 [SM2000] V17 RR* 11 13 41.16 +22 10 18.9           ~ 1 0
141 [SM2000] V23 RR* 11 13 41.58 +22 09 40.3           ~ 1 0
142 [SM2000] V6 RR* 11 13 42.30 +22 10 58.6           ~ 1 0
143 [SM2000] V124 RR* 11 13 42.68 +22 06 25.4           ~ 1 0
144 [SM2000] V143 RR* 11 13 42.93 +22 07 37.7           ~ 1 0
145 [SM2000] V84 RR* 11 13 43.00 +22 07 26.4           ~ 1 0
146 [SM2000] V164 RR* 11 13 43.33 +22 11 57.2           ~ 1 0
147 [SM2000] V144 RR* 11 13 43.62 +22 06 53.2           ~ 1 0
148 2MASS J11134365+2210500 RR* 11 13 43.66 +22 10 50.1           ~ 1 0
149 [SM2000] V150 RR* 11 13 44.15 +22 14 33.2           ~ 1 0
150 [SM2000] V93 RR* 11 13 44.23 +22 05 27.8           ~ 1 0
151 [SM2000] V110 RR* 11 13 44.87 +22 03 39.7           ~ 1 0
152 [SM2000] V162 RR* 11 13 45.68 +22 04 22.8           ~ 1 0
153 [SM2000] V123 RR* 11 13 46.00 +22 07 26.9           ~ 1 0
154 [SM2000] V138 RR* 11 13 46.51 +22 12 51.0           ~ 1 0
155 [SM2000] V151 RR* 11 13 46.82 +22 09 44.5           ~ 1 0
156 [SM2000] V135 RR* 11 13 48.37 +22 06 15.5           ~ 1 0
157 [SM2000] V108 RR* 11 13 48.58 +22 15 11.1           ~ 1 0
158 [SM2000] V89 RR* 11 13 48.63 +22 10 13.3           ~ 1 0
159 [SM2000] V114 RR* 11 13 49.59 +22 04 44.7           ~ 1 0
160 [SM2000] V101 RR* 11 13 49.69 +22 08 35.3           ~ 1 0
161 [SM2000] V88 RR* 11 13 52.92 +22 08 53.0           ~ 1 0
162 NAME UMi Galaxy G 15 09 11.34 +67 12 51.7   13.60 10.6     ~ 1214 0
163 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1202 1
164 [DI93] V3 V* ~ ~           ~ 1 0
165 [DI93] V13 V* ~ ~           ~ 1 0
166 [DI93] V12 V* ~ ~           ~ 1 0
167 [DI93] V7 V* ~ ~           ~ 1 0
168 [DI93] V59 V* ~ ~           ~ 1 0
169 [DI93] V4 V* ~ ~           ~ 1 0
170 [DI93] V63 V* ~ ~           ~ 1 0
171 [DI93] V66 V* ~ ~           ~ 1 0
172 [DI93] V68 V* ~ ~           ~ 1 0
173 [DI93] V58 V* ~ ~           ~ 1 0
174 [DI93] V71 V* ~ ~           ~ 1 0
175 [DI93] V72 V* ~ ~           ~ 1 0
176 [DI93] V51 V* ~ ~           ~ 1 0
177 [DI93] V47 V* ~ ~           ~ 1 0
178 [DI93] V45 V* ~ ~           ~ 1 0
179 [DI93] V42 V* ~ ~           ~ 1 0
180 [DI93] V35 V* ~ ~           ~ 1 0
181 [DI93] V27 V* ~ ~           ~ 1 0
182 [DI93] V26 V* ~ ~           ~ 1 0
183 [DI93] V20 V* ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2021.05.06-05:58:38

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