J/A+A/664/A96 Multiply eclipsing candidates from TESS satellite (Zasche+, 2022)
Multiply eclipsing candidates from the TESS satellite.
Zasche P., Henzl Z., Masek M.
<Astron. Astrophys., 664, A96 (2022)>
=2022A&A...664A..96Z 2022A&A...664A..96Z (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Optical ; Binaries, orbits
Keywords: binaries: eclipsing - binaries: close - stars: fundamental parameters
Abstract:
We present a catalogue of the Transiting Exoplanet Survey Satellite
(TESS) targets that show multiple eclipses. In all of these stars, we
detected two sets of eclipses, for which their two distinctive periods
can be derived. These multiple stellar systems could either be doubly
eclipsing quadruples or triple-star coplanar systems showing eclipses
on the outer orbit in addition to the inner eclipses. In total, 116
systems were found to be doubly eclipsing, while 25 stars were
identified as triply eclipsing triples. Several confirmed blends of
two close sources were not included in our analysis. All these systems
were identified by scanning the known eclipsing systems taken from the
Variable Star Index database and checking their TESS light curves. The
average period of the dominant pair, pair A, is 2.7 days in our
sample, while for the second pair, pair B, the average period is
5.3 days. Several systems show evident eclipse timing variation (ETV)
changes even from the short interval of the TESS data, indicating
possible period changes and short mutual orbit. We also present
evidence that the system V0871 Cen is probably a septuple-star system
of architecture (Aa-Ab)-B-C-D. Most of the presented systems are
adequately bright and show deep enough eclipses for observing, and
therefore we call for new ground-based observations for these
extremely interesting multiples. Owing to this motivation, we have
included also the ephemerides for both pairs of each system, our
catalogue also contains their depths of eclipses and the light-curve
shapes as extracted from the TESS data. These new ground-based
observations would be very useful for further derivation of the mutual
movement of both pairs on their orbit via detection of the ETVs of
both pairs for example.
Description:
We carried out an analysis of all EA-type binaries from the VSX
database (with <15 mag) in an attempt to identify additional eclipses
in the TESS data. Our compilation of 141 systems is so far the most
extensive among other similar studies. The database we present should
be useful to observers and keen astronomers for detailed follow-up
monitoring of these interesting targets. For this reason, we give the
ephemerides for both eclipsing pairs, but also their eclipse depths.
These are crucial parameters for prospective future observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 165 25 Triply eclipsing triple candidates
tablea1.dat 155 116 Doubly eclipsing candidates
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See also:
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 11 F5.2 s RAs Right ascension (J2000.0)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 24 F5.2 arcsec DEs Declination (J2000.0)
26- 53 A28 --- VSX VSX Target name
54 A1 --- n_VSX [*] Note on VSX (1)
56- 68 A13 --- TIC TESS number (TIC NNNNNNNNN)
70- 75 F6.3 mag magmax Out-of-eclipse magnitude
77- 86 F10.5 d JD0A Pair A epoch of the mean magnitude JD0
(JD-2450000)
88- 96 F9.7 d Per Pair A period
98-101 F4.2 mag DP Primary eclipse depth
102 A1 --- n_DP [v]
104-108 F5.3 mag DS Secondary eclipse depth
109 A1 --- n_DS [v]
111-117 F7.2 d JD0O Outer orbit epoch of the mean magnitude JD0
(JD-2450000)
119-165 A47 --- Com Comment
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Note (1): *: independently discovered during preparation of the current
manuscript, and recently published in Rappaport et al. (2022MNRAS.513.4341R 2022MNRAS.513.4341R).
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Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 11 F5.2 s RAs Right ascension (J2000.0)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 24 F5.2 arcsec DEs Declination (J2000.0)
26- 53 A28 --- VSX VSX Target name
55 A1 --- n_VSX [*] Note on VSX (1)
57- 70 A14 --- TIC TESS number (TIC NNNNNNNNN AA + AA)
72- 78 A7 --- EBtype EB type
80- 85 F6.3 mag magmax Out-of-eclipse magnitude (2)
87- 96 F10.5 d JD0A Pair A epoch of the mean magnitude JD0
(JD-2450000)
98-107 F10.7 d PerA Pair A period
110-114 F5.3 mag DPA Pair A approximate primary eclipse depth
116-120 F5.3 mag DSA Pair A approximate secondary eclipse depth
122-131 F10.5 d JD0O Outer orbit epoch of the mean magnitude JD0
(JD-2450000)
133-143 F11.7 d PerB Pair B period
145-149 F5.3 mag DPB Pair B approximate primary eclipse depth
151-155 F5.3 mag DSB Pair B approximate secondary eclipse depth
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Note (1): * for Independently discovered during preparation of the current
manuscript, and recently published in Kostov et al.
(2022ApJS..259...66K 2022ApJS..259...66K, Cat. J/ApJS/259/66).
Note (2): Out-of-eclipse magnitude, Vmag from UCAC4 catalogue (Zacharias et al.,
2013AJ....145...44Z 2013AJ....145...44Z, Cat. I/322), or Guide Star Catalog II
(Lasker et al., 2008AJ....136..735L 2008AJ....136..735L, Cat, I/305, I/353).
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Feb-2023