2013MNRAS.429..385M

Query : 2013MNRAS.429..385M

2013MNRAS.429..385M - Mon. Not. R. Astron. Soc., 429, 385-397 (2013/February-2)

Cepheids and other short-period variables near the Galactic Centre.

MATSUNAGA N., FEAST M.W., KAWADU T., NISHIYAMA S., NAGAYAMA T., NAGATA T., TAMURA M., BONO G. and KOBAYASHI N.

Abstract (from CDS):

We report the result of our near-infrared survey of short-period variable stars (P < 60d) in a field of view of 20 arcminx30 arcmin towards the Galactic Centre (GC). Forty-five variables are discovered and we classify the variables based on their light-curve shapes and other evidence. In addition to 3 classical Cepheids reported previously, we find 16 type II Cepheids, 24 eclipsing binaries, 1 pulsating star with P = 0.265d (RR Lyr or δ Sct) and 1 Cepheid-like variable whose nature is uncertain. Eclipsing binaries are separated into the foreground objects and those significantly obscured by interstellar extinction. One of the reddened binaries contains an O-type supergiant and its light curve indicates an eccentric orbit. We discuss the nature and distribution of type II Cepheids as well as the distance to the GC based on these Cepheids and other distance indicators. The estimates of R0(GC) we obtained based on photometric data agree with previous results obtained with kinematics of objects around the GC. Furthermore, our result gives support to the reddening law obtained by Nishiyama and collaborators, AKs/E(H-Ks)=1.44, because a different reddening law would result in a rather different distance estimate.

Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): binaries: eclipsing - stars: variables: Cepheids - Galaxy: bulge - Galaxy: centre - infrared: stars

VizieR on-line data: <Available at CDS (J/MNRAS/429/385): table2.dat table3.dat table7.dat>

Nomenclature: Table 2: [MFK2013] NN (Nos 1-45).

Simbad objects: 64

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Number of rows : 64
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 OGLE LMC165.4 151 Ce* 05 27 05.2665622992 -71 23 33.273615588     17.482   16.881 ~ 9 0
5 OGLE BLG-T2CEP-1 WV* 17 05 20.3483384228 -32 28 17.647699419     15.759   14.176 ~ 11 0
6 OGLE BLG-T2CEP-2 WV* 17 06 14.9956391136 -33 01 27.570832212     15.188   13.909 ~ 10 0
7 OGLE BLG-T2CEP-3 WV* 17 08 40.1441405808 -32 54 10.417874580     16.519   15.061 ~ 12 0
8 OGLE BLG-T2CEP-4 WV* 17 13 10.8424069176 -29 05 45.361057848     16.404   14.856 ~ 10 0
9 Terz V 886 WV* 17 14 25.4260293912 -28 46 46.664098788     14.853   13.344 ~ 9 0
10 OGLE BLG-T2CEP-7 WV* 17 23 54.7835012904 -29 02 37.781283192     17.468   15.488 ~ 9 0
11 OGLE BLG-T2CEP-8 WV* 17 24 20.9260871976 -27 55 49.206640548     17.765   15.970 ~ 9 0
12 OGLE BLG-T2CEP-9 WV* 17 24 22.2900174096 -29 27 35.558428536     17.630   15.608 ~ 10 0
13 OGLE BLG-T2CEP-10 WV* 17 27 05.5422338280 -25 36 01.587612096     16.718   14.973 ~ 9 0
14 OGLE BLG-T2CEP-11 cC* 17 27 17.6707779768 -25 38 23.650178820     15.379   13.413 ~ 10 0
15 [MFK2013] 1 EB* 17 44 57.0895444392 -29 10 05.866566384           ~ 1 0
16 CXOGCS J174459.0-285123 WV* 17 44 59.0341993464 -28 51 23.764650768           ~ 5 0
17 [MFK2013] 3 RR* 17 44 59.1041342400 -29 09 43.991258688         17.835 ~ 6 0
18 [MFK2013] 4 WV* 17 45 01.324 -28 48 21.42           ~ 2 0
19 [MFK2013] 5 EB* 17 45 02.0436977856 -28 57 21.523506696         15.427 ~ 4 0
20 [MFK2013] 6 WV* 17 45 07.556 -29 06 57.38           ~ 2 0
21 [MFK2013] 7 WV* 17 45 09.130 -28 59 41.82           ~ 2 0
22 OGLE BLG650.23 2128 EB* 17 45 10.3211271240 -29 04 52.762777968         15.198 ~ 4 0
23 [MFK2013] 9 WV* 17 45 13.840 -28 44 44.41           ~ 2 0
24 [MFK2013] 10 WV* 17 45 17.192 -28 57 53.30           ~ 2 0
25 [MFK2013] 11 WV* 17 45 17.644 -28 51 37.27           ~ 2 0
26 2MASS J17452092-2858186 EB* 17 45 20.9198733912 -28 58 18.685251048           ~ 4 0
27 [MFK2013] 13 EB* 17 45 22.1932759632 -28 53 58.437362544           ~ 2 0
28 [MFK2013] 14 EB* 17 45 25.73 -29 09 39.7           ~ 1 0
29 [MFK2013] 15 WV* 17 45 26.006 -29 00 03.66           ~ 2 0
30 [MFK2013] 16 EB* 17 45 28.3617548856 -28 58 22.153410300         18.494 ~ 3 0
31 [MFK2013] 17 s*b 17 45 29.879 -28 54 28.92           O4-5Ia 4 0
32 2MASS J17453089-2903105 cC* 17 45 30.89928 -29 03 10.5840           ~ 8 0
33 [MFK2013] 19 WV* 17 45 31.4699333880 -28 59 53.132046576   12.00 12.42     ~ 3 0
34 2MASS J17453227-2902555 cC* 17 45 32.280 -29 02 55.51           ~ 8 0
35 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
36 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
37 [EG97] S2 * 17 45 40.0442 -29 00 27.975           B0/2V 420 1
38 [MFK2013] 21 EB* 17 45 40.740 -28 52 36.65           ~ 2 0
39 OGLE BLG-ECL-94942 EB* 17 45 49.0510467384 -28 56 45.085852284 18.3 16.6   14.8 14.580 ~ 6 0
40 [MFK2013] 23 EB* 17 45 50.159 -28 55 06.97           ~ 2 0
41 OGLE BLG650.22 6222 EB* 17 45 51.5173835880 -29 03 39.341021616         15.170 ~ 5 0
42 2MASS J17455258-2900001 EB* 17 45 52.585 -29 00 00.20           ~ 1 0
43 [MFK2013] 26 WV* 17 45 53.185 -28 56 20.96           ~ 2 0
44 2MASS J17455326-2904071 EB* 17 45 53.264 -29 04 07.19           ~ 3 0
45 [MFK2013] 28 WV* 17 45 54.130 -28 45 03.34           ~ 3 0
46 [MFK2013] 29 WV* 17 45 54.832 -28 54 38.32           ~ 3 0
47 [MCD2010] 13 s*b 17 46 01.65 -28 55 15.3           B0-1Ia+/WNLh 9 0
48 [MFK2013] 31 WV* 17 46 02.00256 -28 52 50.5668           ~ 2 0
49 2MASS J17460602-2846550 cC* 17 46 06.02088 -28 46 55.0560           ~ 8 0
50 CXOGCS J174606.4-290944 WV* 17 46 06.3685193808 -29 09 44.245554660           ~ 3 0
51 [MCD2010] 15 WR* 17 46 10.01 -28 55 32.4           WN8-9h 9 0
52 [MFK2013] 35 EB* 17 46 10.0723134984 -29 05 17.321870004         17.492 ~ 4 0
53 OGLE BLG-ECL-97609 EB* 17 46 10.4455648344 -29 03 18.409667220 17.1 15.16 15.60 13.28 13.262 ~ 6 0
54 [MFK2013] 37 EB* 17 46 11.713 -28 49 59.96           ~ 3 0
55 [MFK2013] 38 EB* 17 46 12.520 -28 48 52.45           ~ 2 0
56 [MFK2013] 39 WV* 17 46 13.563 -28 48 35.00           ~ 3 0
57 [MFK2013] 40 WV* 17 46 13.570 -28 59 02.33           ~ 2 0
58 OGLE BLG-ECL-98154 EB* 17 46 14.4535115232 -28 48 59.959476972         14.444 ~ 6 0
59 [MFK2013] 42 EB* 17 46 16.270 -28 50 12.62           ~ 2 0
60 [MFK2013] 43 WV* 17 46 24.256 -29 08 28.91           ~ 2 0
61 [MFK2013] 44 EB* 17 46 26.4339410074 -28 57 08.092763925         16.661 ~ 3 0
62 [MFK2013] 45 WV* 17 46 28.462 -29 08 56.23           ~ 2 0
63 NAME Sgr B MoC 17 47 02 -28 25.4           ~ 241 0
64 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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