J/A+A/643/A130 Heliocentric minima for 14 eclipsing binaries (Zasche+, 2020)
Light-time effect detected in fourteen eclipsing binaries.
Zasche P., Uhlar R., Svoboda P., Cagas P., Masek M.
<Astron. Astrophys. 643, A130 (2020)>
=2020A&A...643A.130Z 2020A&A...643A.130Z (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing
Keywords: binaries: eclipsing - stars: fundamental parameters
Abstract:
The available minima timings of 14 selected eclipsing binaries
(V1297 Cas, HD 24105, KU Aur, GU CMa, GH Mon, AZ Vel, DI Lyn, DK Her,
GQ Dra, V624 Her, V1134 Her, KIC 6187893, V1928 Aql, V2486 Cyg) were
collected and analyzed. Using the automatic telescopes, surveys, and
satellite data, we derived more than 2500 times of eclipses,
accompanied with our own ground-based observations. These data were
used to detect the period variations in these multiple systems. The
eclipse timing variations were described using the third-body
hypothesis and the light-time effect. Their respective periods were
derived as 2.5, 16.2, 27, 20, 64, 5.6, 22, 115, 27, 42, 6.9, 11.2,
4.1, and 8.4 years for these systems, respectively. The predicted
minimal mass of the third body was calculated for each of the systems,
and we discuss here their prospective detectability. The light curves
of HD 24105, GH Mon, DK Her, V1134 Her, KIC 6187893, V1928 Aql, and
V2486 Cyg were analyzed using the PHOEBE program, resulting in
physical parameters of the components. Significant fractions of the
third light were detected during the light-curve analysis, supporting
our hypothesis of the triple-star nature of all these systems. The
majority of these systems (nine out of 14) were already known as
visual doubles. Our study shifts them to possible quadruples, what
makes them even more interesting.
Description:
We carried out a thorough analysis of period variations for 14 new
eclipsing systems showing apparent period changes. These changes can
be attributed to hidden distant components in these systems, making
them even more interesting multiples.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 40 14 List of studied stars
photom.dat 71 2666 New unpublished heliocentric minima of the
systems used for our analysis
--------------------------------------------------------------------------------
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Star Name of the star
13- 14 I2 h RAh Simbad right ascension (J2000)
16- 17 I2 min RAm Simbad right ascension (J2000)
19- 23 F5.2 s RAs Simbad right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 35 F4.1 arcsec DEs Declination (J2000)
37- 40 I4 --- N Number of measurements in photom.dat table
--------------------------------------------------------------------------------
Byte-by-byte Description of file: photom.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Star Name of the star
13- 23 F11.5 d HJD Heliocentric JD of Minimum (HJD-2400000)
27- 33 F7.5 d e_HJD Error of HJD
37- 38 A2 --- Filter Filter used
42- 71 A30 --- Ref Source/Observatory
-------------------------------------------------------------------------------
Acknowledgements:
Petr Zasche, zasche(at)sirrah.troja.mff.cuni.cz
(End) Patricia Vannier [CDS] 05-Oct-2020