J/AN/346/70005 Stellar companions of (C)TOIs (Mugrauer+, 2025)
Gaia search for stellar companions of TESS Objects of Interest V.
Mugrauer M., Kollak A.-K., Pietsch L., Michel K.-U.
<Astron. Nachr. 346, e70005 (2025)>
=2025AN....34670005M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ;
Parallaxes, trigonometric ; Stars, masses
Keywords: binaries: visual - stars: individual: TOI5389B, TOI5628B,
CTOI29106627B, CTOI320261550B, CTOI333792947B - white dwarfs
Abstract:
In this paper we present the latest results of our ongoing
multiplicity survey of (Community) TESS Objects of Interest, using
astrometry and photometry from the latest data release of the ESA Gaia
mission to detect stellar companions of these stars and to
characterize their properties. A total of 92 binary and two
hierarchical triple star systems are identified among the 745 target
stars whose multiplicity is explored in this study, all at distances
of less than 500pc around the Sun. As expected for components of
gravitationally bound star systems, the targets and the detected
companions are at the same distance and share a common proper motion,
as shown by their accurate Gaia astrometry. The companions have masses
of about 0.12 to 1.6M☉ and are most frequently found in the mass
range up to 0.6M☉. The companions have projected separations
from the targets between about 110 and 9600au. Their frequency is
highest and constant from about 300 to 800au, decreasing at larger
projected separations. In addition to main sequence stars, five white
dwarf companions are detected in this study, whose true nature is
unveiled by their photometric properties.
Description:
The astrometry & photometry of the (Community) TESS Objects of
Interest (CTOIs) and of their stellar companions are summarized
together with the derived properties of the companions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 109 190 Astrometry and Photometry of (C)TOIs & Companions
table2.dat 90 96 Relative Astrometry of Companions
table3.dat 71 96 Equatorial Coordinates and Properties of Companions
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See also:
J/MNRAS/490/5088 : Stellar companions of exoplanet host stars (Mugrauer, 2019)
J/AN/341/996 : Stellar companions of (C)TOIs (Mugrauer+, 2020)
J/other/FrASS/8.624907 : (Sub)Stellar companions of exoplanet hosts
(Michel+, 2021)
J/AN/342/840 : Stellar companions of (C)TOIs (Mugrauer+, 2021)
J/AN/343/24017 : Stellar companions of (C)TOIs (Mugrauer+, 2022)
J/AN/344/55 : Stellar companions of (C)TOIs (Mugrauer+, 2023)
J/MNRAS/527/3183 : (Sub)Stellar companions of exoplanet hosts (Michel+, 2024)
https://www.astro.uni-jena.de/Users/markus/Multiplicity_of_(C)TOIs.html :
The Multiplicity of TESS Objects of Interest Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star name
16 A1 --- n_Name [*] * for (C)TOIs
18- 24 F7.4 mas Plx Parallax
26- 31 F6.4 mas e_Plx Error of parallax
33- 40 F8.3 mas/yr pmRA Proper motion in right ascension
42- 46 F5.3 mas/yr e_pmRA Error of Proper motion in right ascension
48- 55 F8.3 mas/yr pmDE Proper motion in declination
57- 61 F5.3 mas/yr e_pmDE Error of proper motion in declination
63- 67 F5.3 mas epsi Astrometric excess noise
69- 75 F7.4 mag Gmag ? G-band mean magnitude
77- 82 F6.4 mag e_Gmag ? Error of G-band mean magnitude
84- 89 F6.4 mag AG ? Estimate of G-band extinction
91- 97 F7.4 mag e_AG []? Lower Error of G-band extinction
99-104 F6.4 mag E_AG ? Upper Error of G-band extinction
106-109 A4 --- Note [x SHC2 ] x if AG is derived from AV
SHC2 if AG is derived from the Starhorse2
catalogue
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Name of stellar companion
16- 24 F9.5 arcsec rho Angular separation
26- 32 F7.5 arcsec e_rho Error angular separation
34- 42 F9.5 deg PA Position angle
44- 50 F7.5 deg e_PA Error of position angle
52- 55 F4.2 mas Dplx Parallax difference
57- 60 F4.2 mas e_Dplx Error of parallax difference
62- 64 F3.1 --- sDplx Significance of parallax difference
66- 68 F3.1 --- sDplx-epsi Significance of parallax difference
including epsi
70- 74 F5.2 mas/yr mu-rel Differential proper motion
76- 79 F4.2 mas/yr e_mu-rel Error of differential proper motion
81- 85 F5.1 --- smu-rel Significance of differential proper motion
87- 90 I4 --- CPM Common proper motion index
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Name of stellar companion
16- 30 F15.11 deg RAdeg Right Ascension (ICRS) at Ep=2015.5
32- 46 F15.11 deg DEdeg Declination (ICRS) at Ep=2015.5
48- 52 F5.2 mag GMAG ? Absolute magnitude
54- 57 I4 au Sep Projected separation
59- 62 F4.2 Msun Mass ? Mass
64- 67 I4 K Teff ? Effective temperature
69- 71 A3 --- Note [WD NSS ] WD if Companion is a white dwarf NSS
if a Non-Single-Star solution is listed for
the Companion in the Gaia DR3
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Acknowledgements:
Markus Mugrauer, markus(at)astro.uni-jena.de
(End) Markus Mugrauer [AIU Jena], Patricia Vannier [CDS] 03-Jun-2025