2013A&A...558A..51Z


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST09:14:17

2013A&A...558A..51Z - Astronomy and Astrophysics, volume 558A, 51-51 (2013/10-1)

Apsidal motion and absolute parameters for five LMC eccentric eclipsing binaries.

ZASCHE P. and WOLF M.

Abstract (from CDS):

As part of our observational projects at the La Silla Danish 1.54-meter telescope, we aim to measure the precise times of minimum light for eccentric eclipsing binaries in the Large Magellanic Cloud, needed for accurate determination of apsidal motion. Many new times of minima were derived from the photometric databases OGLE and MACHO. Several new minima were also observed. Five early-type and eccentric-orbit eclipsing binaries: HV 982 (P=5.34d, e=0.15), HV 2274 (5.73d, 0.17), MACHO 78.6097.13 (3.11d, 0.05), MACHO 81.8881.47 (3.88d, 0.22), and MACHO 79.5377.76 (2.64d, 0.06) were studied. The O-C diagrams of the systems were analysed using all reliable timings found in the literature, and new or improved elements of apsidal motion were obtained. Light and radial velocity curves of MACHO 81.8881.47 and MACHO 79.5377.76 were analysed using the program PHOEBE. We derived for the first time or significantly improved the relatively short periods of apsidal motion of 211 (12), 127 (8), 48 (13), 103 (20), and 42 (19) years, respectively. The internal structure constants, logk2, were found to be -2.37, -2.47, -2.17, -2.02, and -1.86 respectively, under the assumption that the component stars rotate pseudosynchronously. The relativistic effects are weak, up to 6% of the total apsidal motion rate. The masses for MACHO 81.8881.47 resulted in 5.51 (0.21) and 5.40 (0.19)M, while for MACHO 79.5377.76 the masses are 11.26 (0.35) and 11.27 (0.35)M, respectively.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: early-type - stars: general - stars: fundamental parameters - Magellanic Clouds

Simbad objects: 42

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Number of rows : 42

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9757 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5905 1
3 OGLE LMC-ECL-1866 EB* 04 52 15.2764733790 -68 19 10.227539091     15.986 15.453 15.010 ~ 19 0
4 OGLE LMC-ECL-3160 LP* 04 55 51.4785449659 -69 13 47.923542825     16.83 15.978 15.869 ~ 23 0
5 SV* HV 2241 V* 04 57 15.7355115776 -66 33 54.284097358   13.82 13.96     O6-8V-III((f)) 28 0
6 SV* HV 2274 EB* 05 02 40.7806907576 -68 24 21.497024742 13.298 13.984 14.127 14.192 14.390 ~ 76 0
7 SV* HV 2284 V* 05 04 10.5 -68 00 25           ~ 2 0
8 2MASS J05043288-6920509 LP* 05 04 32.8762911382 -69 20 51.028896242     15.62 14.736 14.659 ~ 22 0
9 OGLE LMC-SC12 152437 EB* 05 06 37.75 -69 14 21.9   16.75 16.676 16.90 16.618 ~ 9 0
10 OGLE J050828.13-684825.1 EB* 05 08 28.0994 -68 48 26.021 13.209 14.386 14.323 14.370 14.814 ~ 11 0
11 OGLE J051019.64-685812.3 EB* 05 10 19.65 -68 58 12.0     16.673   15.715 ~ 29 0
12 OGLE J051102.89-691309.8 EB* 05 11 02.80 -69 13 09.6     15.887 15.78 16.016 ~ 9 0
13 2MASS J05114945-6705451 LP* 05 11 49.4661000444 -67 05 45.128808383     16.21 15.70 15.130 ~ 19 0
14 OGLE J051323.98-692249.2 EB* 05 13 23.91 -69 22 48.9   15.97 15.786 15.96 15.748 ~ 11 0
15 2MASS J05140190-6841184 LP* 05 14 01.908 -68 41 18.41     16.58 16.04 15.377 ~ 19 0
16 2MASS J05140595-6915568 LP* 05 14 05.9512534732 -69 15 56.786389344     16.56 15.639   ~ 19 1
17 OGLE LMC-ECL-11244 EB* 05 15 41.6314235974 -70 04 39.736079671 14.605 15.447 15.439 16.00 15.912 ~ 9 0
18 OGLE J051804.81-694818.9 EB* 05 18 04.7110145628 -69 48 18.908094970 13.566 14.658 14.698 14.94 14.901 ~ 17 0
19 SV* HV 12012 EB* 05 19 11.7873771387 -69 42 24.840934999 14.404 15.396 15.135   15.699 ~ 25 0
20 OGLE J052235.46-693143.4 EB* 05 22 35.34 -69 31 43.3   15.48 15.439 15.84 15.634 ~ 14 0
21 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15288 1
22 2MASS J05252555-6933044 LP* 05 25 25.550 -69 33 04.49     17.01 16.40 15.620 ~ 23 0
23 OGLE LMC-ECL-15523 EB* 05 26 04.43 -69 17 10.4     15.901 16.02 16.084 ~ 7 0
24 SK -67 105 EB* 05 26 06.1886202712 -67 10 56.785338528 11.785 12.27 12.42   11.661 OB 32 0
25 SV* HV 12041 EB* 05 26 21.604 -69 05 44.15 15.233 15.826 16.028 15.93 15.785 ~ 8 0
26 [L72] LH 54-425 SB* 05 26 24.2505 -67 30 17.194   12.915 13.130     O3V+O5V 16 0
27 SV* HV 2543 V* 05 27 27.3921523578 -67 11 54.504435858 11.913 13.014 13.206   13.055 OB 21 0
28 SV* HV 982 EB* 05 29 52.31 -69 09 22.6   14.76 14.648 14.99 14.761 ~ 46 0
29 X LMC X-4 HXB 05 32 49.5558669817 -66 22 13.202534152   13.9 14.0     O8III 618 0
30 SV* HV 5936 EB* 05 33 38.82 -66 37 40.0   15.01 14.741 15.25 14.911 ~ 32 0
31 OGLE BRIGHT-LMC-ECL-17 EB* 05 34 41.3495961530 -69 31 38.667505484 12.739 13.672 14.050 13.79 13.966 O3If+O6V 21 0
32 W61 28-22 EB* 05 34 48.1068216042 -69 42 36.504750562   12.81 12.97 13.06 13.04 O7III 17 0
33 OGLE J053517.75-694318.7 EB* 05 35 17.5934186940 -69 43 18.779870248     14.891 15.03 15.060 ~ 8 0
34 [ST92] 2-28 EB* 05 35 50.7807838340 -69 12 00.591384268   14.66 14.318 14.53 14.115 O7V+O8V 15 0
35 [HSH95] 38 ** 05 38 42.0996 -69 06 07.795           O3V+O6V 21 0
36 [HSH95] 42 ** 05 38 42.1802 -69 06 02.384           O3V+O3V 14 0
37 [HSH95] 39 ** 05 38 42.4896 -69 06 01.286     14.53     O4V((f))+O6: 7 0
38 [HSH95] 77 ** 05 38 42.5592 -69 06 04.389     15.24     O5.5V+O5.5V 8 0
39 X LMC X-3 HXB 05 38 56.6325045489 -64 05 03.321118015   17 17.2     B2.5Ve 637 0
40 W61 3-9 SB* 05 38 58.0847645877 -69 30 11.318720270 12.832 13.955 13.740   14.177 O9V+O9.5V 12 0
41 X LMC X-1 HXB 05 39 38.8285930597 -69 44 35.533031148   14.8 14.5     O8(f)p 576 2
42 V* DI Her EB* 18 53 26.2400114975 +24 16 40.792385926   8.46 8.47     B5III 245 0

    Equat.    Gal    SGal    Ecl

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2021.04.16-09:14:17

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