2018AJ....156..299W

Query : 2018AJ....156..299W

2018AJ....156..299W - Astron. J., 156, 299-299 (2018/December-0)

Kinematics of Type II Cepheids of the Galactic Halo.

WALLERSTEIN G. and FARRELL E.M.

Abstract (from CDS):

In a step toward understanding the origin of the Galactic Halo, we have reexamined Type II Cepheids (T2C) in the field with new input from the second data release (DR2) of Gaia. For 45 T2C with periods from 1 to 20 days, parallaxes, proper motions, and [Fe/H] values are available for 25 stars. Only five show [Fe/H] < -1.5, while the remaining stars show thick disk kinematics and [Fe/H] > -0.90. We have compared the T2C stars of the field with their cousins in the globular clusters of the Halo and found that the globular clusters with T2C stars show metallicities and kinematics of a pure Halo population. The globular cluster may have formed during the overall collapse of the Galaxy, while the individual thick disk T2C stars may have been captured from small systems that self-enriched prior to capture. The relationship of these two populations to the microgalaxies currently recognized as surrounding the Galaxy is unclear.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: halo - globular clusters: general - stars: variables: Cepheids

Simbad objects: 90

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Number of rows : 90
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* IX Cas WV* 00 04 50.8165981056 +50 14 05.540024148   12.04 11.36     F7 61 0
2 V* BD Cas cC* 00 09 51.3937382112 +61 30 50.547772980   12.38 11.22     ~ 64 0
3 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3913 0
4 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 687 1
5 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 800 1
6 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12639 1
7 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1041 0
8 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1084 0
9 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7059 0
10 V* UY Eri WV* 03 13 39.1354081104 -10 26 32.405933364   11.744 11.281 11.318   F 78 0
11 V* SW Tau WV* 04 24 32.9729044632 +04 07 24.080336400   10.23 9.33     A7 113 0
12 V* RV Tau RV* 04 47 06.7239850584 +26 10 45.532913268   11.00 9.80     K3Ibe 279 1
13 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1429 0
14 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 816 0
15 NAME Gal Anticenter reg 05 46 +28.9           ~ 910 0
16 V* ST Pup pA* 06 48 56.4136156056 -37 16 33.338192304   10.47 9.28 9.89 9.29 G2I 92 0
17 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 497 0
18 V* CN CMa cC* 07 09 34.5841465584 -18 33 47.853797616     13.739   12.268 ~ 21 0
19 V* BE Pup cC* 07 33 35.5028274936 -25 50 37.228061724     13.675   12.362 ~ 30 0
20 V* CO Pup WV* 08 26 11.9557975008 -30 17 08.330493228   11.86 10.74     ~ 30 0
21 V* VY Pyx WV* 08 54 29.6304994464 -23 31 18.574555548   7.80 7.24     F3/5III 38 0
22 V* CY Vel WV* 09 08 24.1489454568 -53 29 40.535699424     12.59   11.373 ~ 10 0
23 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1419 0
24 V* DD Vel WV* 09 12 09.6339360120 -50 22 33.613290300     12.36     ~ 36 0
25 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 884 0
26 V* KZ Cen WV* 12 01 55.1888009184 -46 16 41.399413068   13.074 12.529 12.631   ~ 23 0
27 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 997 0
28 V* CQ Cha RR* 12 50 06.8127759744 -77 56 00.812297040   14.166 13.388 13.355 12.445 ~ 6 0
29 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1177 0
30 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 425 0
31 V* BV Cha WV* 13 02 21.1921046880 -79 45 26.286260760           ~ 10 0
32 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 836 0
33 V* W Vir WV* 13 26 01.9928807928 -03 22 43.431062880   10.33 9.46 9.29 9.393 F2Ibe 300 0
34 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3424 0
35 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2478 0
36 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 443 0
37 V* AL Vir WV* 14 11 09.0461976912 -13 18 38.439874440   10.13 9.10     F3/5III 86 0
38 V* XX Vir WV* 14 16 48.5934410448 -06 17 15.064681488   12.38 11.65     F6 66 0
39 HD 129981 WV* 14 46 33.6355780248 -32 10 15.265235964   8.92 8.27 9.14   G5I/IIIpCH 104 0
40 V* BF Ser cC* 15 16 28.5001622760 +16 26 39.692610348   12.08 12.02     A9.5 50 0
41 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 389 0
42 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 462 0
43 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1848 0
44 NGC 6144 GlC 16 27 13.86 -26 01 24.6           ~ 243 0
45 V* V716 Oph cC* 16 30 49.4656238088 -05 30 19.571456772   11.60 11.79     F2 50 0
46 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
47 V* RT TrA WV* 16 34 30.8919954072 -63 08 00.814602012   10.42 9.70     G2Ib-II: 61 0
48 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2191 0
49 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 676 0
50 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 789 0
51 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 224 0
52 M 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 317 0
53 V* V745 Oph WV* 17 20 02.9332738128 +03 48 55.958996196           ~ 25 0
54 V* DU Ara WV* 17 23 12.6097100544 -63 53 47.490961344   12.21       ~ 23 0
55 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 350 1
56 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 585 0
57 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 913 1
58 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 385 0
59 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1975 0
60 V* CE Her cC* 17 41 56.5540526808 +15 04 30.222696036   12.557 12.200 12.299   hF5mA7 48 0
61 V* V439 Oph WV* 17 43 33.2732545608 +03 35 36.069357264   13.46 12.25     ~ 35 0
62 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 884 0
63 V* BL Her WV* 18 01 09.2240599584 +19 14 56.696475012   10.54 9.70     F0 172 0
64 V* V2338 Oph WV* 18 05 28.9192709904 +07 54 20.938821840   13       ~ 16 0
65 V* RS Pav WV* 18 07 22.0062063432 -58 57 42.045122232   11.36 10.10     Ke 29 0
66 V* FI Sct cC* 18 46 19.1593325088 -06 34 06.675344328   14.86     12.291 C 10 0
67 V* AP Her WV* 18 50 27.7290127008 +15 56 24.669429612 12.09 11.33 10.87     F2Ib/II 65 0
68 V* PZ Aql WV* 18 55 56.0446326720 -02 52 47.035601220   13.13 11.79     F5 29 0
69 * kap Pav WV* 18 56 57.0289935240 -67 14 00.581211276   5.08 4.40     G5Iab/b 129 0
70 V* VZ Aql WV* 19 05 02.9644174800 -06 50 58.611417504   13.80     12.607 ~ 37 0
71 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2000 0
72 V* NW Lyr WV* 19 15 56.3444420064 +34 27 08.108273484   13.03 12.22     ~ 32 0
73 M 56 GlC 19 16 35.57 +30 11 00.5           ~ 422 0
74 V* AL Lyr WV* 19 19 29.6172143976 +27 33 44.438357556   12.95 11.98     ~ 24 0
75 V* V971 Aql WV* 19 26 04.7926863624 -10 54 30.937223304   12.47 11.84     ~ 24 0
76 V* LN Pav WV* 19 26 10.2695092320 -69 54 58.963749264           ~ 4 0
77 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 853 0
78 V* MQ Aql cC* 19 40 55.6949745864 +12 37 10.003193148           ~ 12 0
79 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1127 0
80 V* V1043 Cyg cC* 20 13 06.6645705240 +37 48 22.627365660           ~ 8 0
81 V* BX Del WV* 20 21 18.9701299392 +18 26 16.298607264   12.35 11.99     F5 44 0
82 V* V383 Cyg cC* 20 28 58.1572781664 +34 08 06.362995488   12.512 10.883   8.964 ~ 41 0
83 V* TX Del WV* 20 50 12.6952830192 +03 39 08.360890416   9.95 8.84     F8 103 0
84 V* AU Peg WV* 21 24 00.2421322416 +18 16 43.777873164   9.993 9.355 9.203   F8 101 0
85 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3138 0
86 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1030 1
87 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1048 0
88 V* V394 Cep cC* 22 02 40.9017952080 +59 27 08.933890032   15.144 13.706 13.589   ~ 15 0
89 V* V351 Cep cC* 22 33 41.3490623952 +57 19 05.900077740   10.39 9.50     F8Ib 53 0
90 NAME Galactic Bulge reg ~ ~           ~ 4297 0

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