J/A+A/703/A153 Ten new triply eclipsing triple star systems (Borkovits+, 2025)
Ten new, ultracompact triply eclipsing triple star systems.
Borkovits T., Rappaport S.A., Mitnyan T., Gagliano R., Jacobs T., Powell B.,
Kostov V., Omohundro M., Kristiansen M.H., Terentev I., Schwengeler H.M.,
LaCourse D., Garai Z., Pribulla T., Biro I.B., Csanyi I., Dencs Z., Pal A.
<Astron. Astrophys. 703, A153 (2025)>
=2025A&A...703A.153B 2025A&A...703A.153B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Binaries, eclipsing ; Optical
Keywords: binaries: close - binaries: eclipsing -
binaries: general - stars: fundamental parameters -
Abstract:
We have identified more than a hundred close triply eclipsing
hierarchical triple star systems from data taken with the space
telescope TESS. Many of them have outer periods less than or, close to
100 days, hence, we call them "ultracompact hierarchical triples".
These systems are noteworthy in that we can potentially determine
their dynamical and astrophysical parameters with a high precision. In
the present paper we report the comprehensive study of ten new
ultracompact triply eclipsing triple star systems, located in the
northern ecliptic hemisphere, taken from this larger sample: TICs
198581208, 265274458, 283846096, 337993842, 351404069, 378270875,
403792414, 403916758, 405789362, 461500036. Most of the data for this
study come from TESS observations, but we obtained supplemental
ground-based photometric measurements for two of the systems. The
eclipse timing variation curves extracted from the TESS and the
ground-based follow up data, the photometric lightcurves, and the
spectral energy distribution are combined in a complex photodynamical
analysis to yield the stellar and orbital parameters of all ten
systems. The outer periods are in the range of 46.8-101.4 days. We
found third-body forced, rapid apsidal motion in four systems.
Moreover, TIC 403916758 was found to be a double twin triple (i.e.
both the inner and the outer mass ratios are close to unity). All of
the systems are substantially flat, with mutual inclination angles of
less than 5 degrees. Finally, we have taken the results for the ten
systems in the present paper, and combined them with the system
parameters for more than 30 other compact triples that we have
reported on in previous work, in order to examine some of the global
properties of these systems on a statistical basis.
Description:
Times of the individual primary and secondary eclipses of the inner
EBs of the triples considered (TIC 198581208, TIC 265274458,
TIC 283846096, TIC 3337993842, TIC 51404069, TIC 378270875,
TIC 403792414, TIC 403916758, TIC 405789362 and TIC 461500036). These
naturally include mostly eclipses from TESS, plus a few that were
observed from the ground (Tables F.1-F.10).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 50 10 List of studied stars
tablef1.dat 31 127 Times of minima of TIC 198581208
tablef2.dat 31 84 Times of minima of TIC 265274458
tablef3.dat 31 30 Times of minima of TIC 283846096
tablef4.dat 31 122 Times of minima of TIC 337993842
tablef5.dat 31 41 Times of minima of TIC 351404069
tablef6.dat 31 201 Times of minima of TIC 378270875
tablef7.dat 31 52 Times of minima of TIC 403792414
tablef8.dat 31 367 Times of minima of TIC 403916758
tablef9.dat 31 134 Times of minima of TIC 405789362
tablef10.dat 31 293 Times of minima of TIC 461500036
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See also:
IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name (TIC NNNNNNNNN)
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 25 F5.2 s RAs Right ascension (J2000)
27 A1 --- DE- Declination sign (J2000)
28- 29 I2 deg DEd Declination (J2000)
31- 32 I2 arcmin DEm Declination (J2000)
34- 37 F4.1 arcsec DEs Declination (J2000)
39- 50 A12 --- FileName Name of the table with times of minima
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Byte-by-byte Description of file: tablef*.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d BJD BJD of mid-eclipse times (BJD-2400000)
13 A1 --- Note Specific note on mid-eclipse times (1)
15- 20 F6.1 --- Cycle Cycle numbers (2)
23- 31 F9.5 d stddev Standard deviations of mid-eclipse times
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Note (1): Eclipses observed with the GAO80 and BAO80 instruments are signed
with 'a' and 'b', respectively.
Note (2): Integer and half-integer cycle numbers denote primary and secondary
eclipses, respectively.
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Acknowledgements:
From Tamas Borkovits, mtibor(at)titan.physx.u-szeged.hu
This paper makes extensive use of data collected by the TESS mission.
Funding for the TESS mission is provided by the NASA Science Mission
directorate. Some of the data presented in this paper were obtained
from the Mikulski Archive for Space Telescopes (MAST). STScI is
operated by the Association of Universities for Research in Astronomy,
Inc., under NASA contract NAS5-26555. Support for MAST for non-HST
data is provided by the NASA Office of Space Science via grant
NNX09AF08G and by other grants and contracts.
(End) Patricia Vannier [CDS] 06-Oct-2025