J/A+A/642/A63 CzeV1731 times of eclipses and radial velocities (Zasche+, 2020)
CzeV1731: The unique doubly eclipsing quadruple system.
Zasche P., Henzl Z., Lehmann H., Pepper J., Powell B.P., Kostov V.B.,
Barclay T., Wolf M., Kucakova H., Uhlar R., Masek M., Palafouta S.,
Gazeas K., Stassun K.G., Gaudi B.S., Rodriguez J.E., Stevens D.J.
<Astron. Astrophys. 642, A63 (2020)>
=2020A&A...642A..63Z 2020A&A...642A..63Z (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Radial velocities
Keywords: binaries: eclipsing - binaries: spectroscopic -
stars: fundamental parameters
Abstract:
We report the discovery of the relatively bright (V=10.5mag), doubly
eclipsing 2+2 quadruple system CzeV1731. This is the third known
system of its kind, in which the masses are determined for all four
stars and both the inner and outer orbits are characterized. The inner
eclipsing binaries are well-detached systems moving on circular
orbits: pair A with period PA=4.10843d and pair B with
PB=4.67552d. The inner binaries contain very similar components
(q∼1.0), making the whole system a so-called double twin. The stars in
pair B have slightly larger luminosities and masses and pair A shows
deeper eclipses. All four components are main-sequence stars of F/G
spectral type. The mutual orbit of the two pairs around the system
barycenter has a period of about 33 yr and an eccentricity of about
0.38. However, further observations are needed to reveal the overall
architecture of the whole system, including the mutual inclinations of
all orbits. This is a promising target for interferometry to detect
the double at about 59mas and {DELTA}Mbol<1mag.
Description:
The discovery and analysis of the system CzeV1731 represents a rare
configuration of a 2+2 quadruple star system containing two eclipsing
binaries, the third system of its kind known to date.
The system under investigation in this work is TYC 3929-724-1
(= 2MASS J19245582+5704084 = TIC 284482112), located at
RA=19:24:55.82, DE=+57:04:08.39, with Vmax=10.5mag.
We present times of eclipses and radial velocities of both pairs.
Objects:
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RA (2000) DE Designation(s)
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19 24 55.82 +57 04 08.4 CzeV1731 = 2MASS J19245582+5704084
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
etv.dat 61 256 Times of eclipses of both pairs
rv.dat 56 38 Radial velocities of both pairs
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Byte-by-byte Description of file: etv.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Comp Name of the component (Pair A or Pair B)
9- 22 F14.6 d BJD Barycentric Julian Date of eclipse
25- 32 F8.6 d e_BJD Error on BJD
36- 61 A26 --- Obs Observatory name
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Byte-by-byte Description of file: rv.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Comp Name of the component (Pair A or Pair B)
10- 12 A3 --- P/S Primary or secondary component (Pri or Sec)
15- 28 F14.6 d BJD Barycentric Julian Date of observation
31- 37 F7.2 km/s RV Radial velocity
39- 43 F5.2 km/s e_RV Error on RV
47- 56 A10 --- Obs Observatory name
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Acknowledgements:
Petr Zasche, zasche(at)sirrah.troja.mff.cuni.cz
(End) Patricia Vannier [CDS] 20-Aug-2020