2014AJ....147..149B


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.18CEST03:24:25

2014AJ....147..149B - Astron. J., 147, 149 (2014/June-0)

Study of eclipsing binary and multiple systems in OB associations. II. The Cygnus OB region: V443 Cyg, V456 Cyg, and V2107 Cyg.

BAKIS V., HENSBERGE H., BILIR S., BAKIS H., YILMAZ F., KIRAN E., DEMIRCAN O., ZEJDA M. and MIKULASEK Z.

Abstract (from CDS):

Three presumably young eclipsing binary systems in the direction of the Cygnus OB1, OB3, and OB9 associations are studied. Component spectra are reconstructed and their orbits are determined using light curves and spectra disentangling techniques. V443 Cyg and V456 Cyg have circular orbits while the light curve of V2107 Cyg imposes a slightly eccentric orbit (e = 0.045±0.03). V443 Cyg harbors F-type stars, not young early-A stars as previously suggested in the literature based solely on photometry. It appears to be situated in the foreground (distance 0.6±0.2 kpc) of the young stellar populations in Cygnus. V456 Cyg, at a distance of 0.50±0.03 kpc, consists of a slightly metal-weak A-type star and an early-F star. The age of both systems, on or very near to the main sequence, remains uncertain by an order of magnitude. V2107 Cyg is a more massive system (8.9±2 and 4.5±1.2 M) at 1.5±0.5 kpc and, also kinematically, a strong candidate-member of Cyg OB1. The more massive component is slightly evolved and appears to undergo non-radial βCep-type pulsations. The Doppler signal of the secondary is barely detectable. A more extensive, asteroseismological study is necessary to fix masses more precisely. Nevertheless, the position of the primary in the H-R diagram confines the age reasonably well to 20±5 Myr, indicating that for Cyg OB1 has a similar extent of star formation history as that established for Cyg OB2.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: distances - stars: fundamental parameters

Simbad objects: 39

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Number of rows : 39

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 * gam Lep PM* 05 44 27.7908940 -22 26 54.180763 4.08 4.07 3.60 3.15 2.89 F6V 401 0
2 * sig Boo PM* 14 34 40.8171808483 +29 44 42.463685978 4.76 4.84 4.47 4.13 3.94 F4VkF2mF1 580 0
3 HD 145689 PM* 16 17 05.4100392664 -67 56 28.624694971   6.090 5.944     A3V 56 0
4 HD 163318 * 17 56 41.8404746450 -28 03 55.421464577   5.964 5.763     A7III/IV 32 0
5 * zet Ser PM* 18 00 29.0113725 -03 41 24.968552   4.982 4.616     F2V 180 0
6 V* V1356 Cyg EB* 19 56 39.4108927702 +29 59 29.152024333 10.12 10.59 10.22     B0 27 0
7 V* V698 Cyg EB* 19 59 53.3495232412 +36 16 39.998887866   12.41 11.57     B2 14 0
8 V* V448 Cyg EB* 20 06 09.9485954895 +35 23 09.614693894 7.89 8.45 8.16     O9.5V+B1Ib 144 0
9 V* V453 Cyg EB* 20 06 34.9662773363 +35 44 26.267177168 7.83 8.52 8.40     B0.4IV+B0.7IV 193 0
10 Ass Cyg OB 3 As* 20 07 +35.9           ~ 172 0
11 HD 191473 EB* 20 08 45.7722902123 +37 14 13.354347174 8.04 8.73 8.63     B1III 49 0
12 LS II +37 13 * 20 08 51.7476505038 +37 15 39.262708738   11.61 11.19     B9II 7 0
13 V* V2108 Cyg EB* 20 09 11.7762226865 +33 55 11.797344672 7.4 7.89 7.90     B9II 31 0
14 HD 227966 * 20 09 12.6419562951 +37 19 06.174692974   9.92 9.51     F2Ib 7 0
15 V* BD Cap dS* 20 10 06.7542063592 -25 17 02.445325976   7.87 7.44     A9III 28 0
16 HD 191765 WR* 20 10 14.1929815789 +36 10 35.069005168 7.64 8.08 8.08     WN6-s 429 0
17 HD 192163 WR* 20 12 06.5420067895 +38 21 17.783840972 7.12 7.49 7.50     WN6(h)-s 526 0
18 Ass Cyg OB 8 As* 20 15 +40.9           ~ 67 0
19 V* KV Cyg EB* 20 15 38.1350574608 +36 47 36.786803650   11.78 11.23     B1V 30 0
20 V* V435 Cyg EB* 20 16 26.9848340510 +38 45 40.856772119     12.749     B7III 15 0
21 IC 4996 OpC 20 16 30 +37 38.0           ~ 165 0
22 Ass Cyg OB 1 As* 20 17.8 +37 38           ~ 254 1
23 V* V382 Cyg EB* 20 18 47.2203014045 +36 20 26.091543194 9.35 9.19 8.65     O6IVn+O5Vn 175 0
24 V* V470 Cyg EB* 20 19 21.7122608286 +40 53 16.456312400   8.737 8.48     B2 66 0
25 HD 193576 WR* 20 19 32.4230196684 +38 43 53.958209968 8.15 8.53 8.00     WN5+O6II-V 687 0
26 V* V478 Cyg EB* 20 19 38.7475966004 +38 20 09.193010946   9.16 8.767     B0Vp 180 0
27 Ass Cyg OB 9 As* 20 21 +39.9           ~ 124 0
28 HD 229179 EB* 20 23 10.8279923139 +39 09 44.368150224 11.08 10.75 9.94     B1:III: 44 0
29 M 29 OpC 20 23 56 +38 31.4   7.30 6.6     ~ 225 0
30 V* V455 Cyg EB* 20 26 20.9237244462 +39 40 10.066973422 10.53 10.42 9.51     B2e?p? 40 0
31 V* V443 Cyg EB* 20 27 45.6276399068 +38 41 23.962224280   12.37 12.22     F2/3V+F8V 28 0
32 GSC 03152-01079 * 20 27 53.6058481870 +38 43 50.862210427   14.17 13.38 13.12   ~ 1 0
33 GSC 03152-00567 * 20 27 56.1943492344 +38 44 36.101188244   13.31 12.43 12.16   ~ 1 0
34 TYC 3152-439-1 * 20 28 35.1125773351 +39 14 43.426506151   10.83 10.53     ~ 4 0
35 TYC 3152-491-1 * 20 28 40.9238730505 +39 09 56.393896719   11.18 11.11     ~ 2 0
36 V* V456 Cyg EB* 20 28 50.8469821242 +39 09 13.741396739   11.16 10.85     A2hA7mA4V+F3V 59 0
37 NAME Cyg Complex reg 20 32 +45.0           ~ 535 0
38 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 824 0
39 Ass Cyg OB 7 As* 21 08 +47.6           ~ 199 0

    Equat.    Gal    SGal    Ecl

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2021.05.18-03:24:25

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