2013A&A...560A..22M

Query : 2013A&A...560A..22M

2013A&A...560A..22M - Astronomy and Astrophysics, volume 560A, 22-22 (2013/12-1)

Anchors for the cosmic distance scale: the Cepheids U Sagittarii, CF Cassiopeiae, and CEab Cassiopeiae.

MAJAESS D., CARRARO G., MONI BIDIN C., BONATTO C., BERDNIKOV L., BALAM D., MOYANO M., GALLO L., TURNER D., LANE D., GIEREN W., BORISSOVA J., KOVTYUKH V. and BELETSKY Y.

Abstract (from CDS):

New and existing X-ray, UBVJHKsW(1–4), and spectroscopic observations were analyzed to constrain fundamental parameters for M25, NGC 7790, and dust along their sight-lines. The star clusters are of particular importance because they host the classical Cepheids USgr, CF Cas, and the visual binary Cepheids CEa and CEb Cas. Precise results from the multiband analysis, in tandem with a comprehensive determination of the Cepheids' period evolution (dP/dt) from ∼140 years of observations, helped to resolve concerns raised regarding the clusters and their key Cepheid constituents. Specifically, the distances derived for members of M25 and NGC7790 are 630±25pc and 3.40±0.15kpc, respectively.

Abstract Copyright: ∼

Journal keyword(s): stars: variables: Cepheids - Hertzsprung-Russell and C-M diagrams

Simbad objects: 23

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Number of rows : 23
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* SU Cas cC* 02 51 58.7511911208 +68 53 18.606894036 6.92 6.44 5.80     F5.5III+ 424 1
2 Cl Alessi 95 Cl* 02 52 15.1 +68 53 19           ~ 11 0
3 Cl Melotte 20 OpC 03 26 28.1 +48 58 30           ~ 861 0
4 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3435 0
5 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3074 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17435 0
7 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 356 0
8 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2364 3
9 V* QZ Nor cC* 16 11 20.4664528848 -54 21 14.824796688 10.08 9.53 8.71 8.66   G1Iab 137 0
10 V* V340 Nor cC* 16 13 17.3997630552 -54 14 05.586545400   9.61 8.47 8.83   G2Iab 160 1
11 V* Y Sgr cC* 18 21 22.9862401944 -18 51 36.006450458 7.31 6.69 5.75   4.810 F8II 289 0
12 IC 4725 OpC 18 31 44.9 -19 06 50           ~ 222 0
13 V* U Sgr cC* 18 31 53.3323107600 -19 07 30.261459540 8.50 7.81 6.68   5.413 G1Ib 467 0
14 LS I +60 63 Em* 23 58 07.3715783304 +61 11 44.831147568 10.81 11.32 11.1     B0.5V 29 0
15 V* CE Cas ** 23 58 09.313 +61 12 49.26     10.63     F9Ib+F8Ib 131 0
16 V* CF Cas cC* 23 58 17.9760671064 +61 13 15.821693832   12.72 10.80   9.700 F8Ibv 245 0
17 Cl* NGC 7790 ROM 143 * 23 58 23.1546214680 +61 12 24.967252512   13.16 12.76     B5IV: 11 0
18 NGC 7790 OpC 23 58 27.1 +61 12 36   9.18 8.5     ~ 272 0
19 NGC 7790 95 * 23 58 28.0637295624 +61 12 03.025629180   12.88 12.65     B5IV 7 0
20 NGC 7790 55 * 23 58 29.0174100264 +61 12 41.383983420   13.42 13.10     ~ 8 0
21 [D75b] Em* 23+062 Em* 23 58 30.6406425864 +61 12 18.636661872   13.53 13.10     B8IV 11 0
22 NGC 7790 52 * 23 58 31.2810984168 +61 12 49.713879960   13.52 13.14     ~ 9 0
23 NAME Galactic Bulge reg ~ ~           ~ 4299 0

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