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  • Aims. 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. d 34, e = 0.15), HV 2274 (5. d 73, 0.17), MACHO 78.6097.13 (3. d 11, 0.05), MACHO 81.8881.47 (3. d 88, 0.22), and MACHO 79.5377.76 (2. d 64, 0.06) were studied. Methods. 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. Results. 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, log k2, 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.
  • Aims. 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. d 34, e = 0.15), HV 2274 (5. d 73, 0.17), MACHO 78.6097.13 (3. d 11, 0.05), MACHO 81.8881.47 (3. d 88, 0.22), and MACHO 79.5377.76 (2. d 64, 0.06) were studied. Methods. 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. Results. 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, log k2, 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. (en)
Title
  • Apsidal motion and absolute parameters for five LMC eccentric eclipsing binaries
  • Apsidal motion and absolute parameters for five LMC eccentric eclipsing binaries (en)
skos:prefLabel
  • Apsidal motion and absolute parameters for five LMC eccentric eclipsing binaries
  • Apsidal motion and absolute parameters for five LMC eccentric eclipsing binaries (en)
skos:notation
  • RIV/00216208:11320/13:10173966!RIV14-GA0-11320___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, P(GAP209/10/0715), P(LG12001), Z(MSM0021620860)
http://linked.open...iv/cisloPeriodika
  • říjen
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 61906
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11320/13:10173966
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Magellanic Clouds; stars: fundamental parameters; stars: general; stars: early-type; binaries: eclipsing (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • FR - Francouzská republika
http://linked.open...ontrolniKodProRIV
  • [594F05F75DBF]
http://linked.open...i/riv/nazevZdroje
  • Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 558
http://linked.open...iv/tvurceVysledku
  • Zasche, Petr
  • Wolf, Marek
http://linked.open...ain/vavai/riv/wos
  • 000326574000051
http://linked.open...n/vavai/riv/zamer
issn
  • 0004-6361
number of pages
http://bibframe.org/vocab/doi
  • 10.1051/0004-6361/201322054
http://localhost/t...ganizacniJednotka
  • 11320
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