J/AN/344/55 Stellar companions of (C)TOIs (Mugrauer+, 2023)
Gaia search for stellar companions of TESS Objects of Interest IV.
Mugrauer M., Rueck J., Michel K.-U.
<Astron. Nachr. 344, e230055 (2023)>
=2023AN....34430055M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ;
Parallaxes, trigonometric ; Stars, masses
Keywords: binaries: visual - stars: imaging -
stars: individual: TOI3714B, TOI3984B, TOI4301B, CTOI13073396B -
white dwarfs
Abstract:
We present the latest results of our ongoing multiplicity study of
(Community) TESS Objects of Interest, using astrometric and
photometric data from the ESA-Gaia mission to detect stellar
companions of these stars and characterize their properties.
A total of 134 binary, 6 hierarchical triple, and 2 quadruple star
systems are identified among 1106 targets whose multiplicity is
investigated in the course of our survey, located at distances closer
than about 500pc around the Sun. The detected companions and targets
are at the same distance and have a common proper motion, as expected
for components of gravitationally bound stellar systems, as
demonstrated by their accurate Gaia DR3 astrometry. The companions
have masses from about 0.11 to 2M☉ and are most abundant in the
mass range between 0.2 and 0.5M☉. The companions have projected
separations from the targets between about 50 and 9700au. Their
frequency is the highest and constant from about 300 up to 750au,
decreasing at larger projected separations. In addition to main
sequence stars, four white dwarf companions are detected in this
study, whose true nature is revealed by their photometric properties.
Description:
The astrometry and 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 110 291 Astro- and photometry of (C)TOIs and companions
table2.dat 93 149 Relative astrometry of companions
table3.dat 74 149 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/AN/342/840 : Stellar companions of (C)TOIs (Mugrauer+, 2021)
J/AN/343/24017 : Stellar companions of (C)TOIs (Mugrauer+, 2022)
J/other/FrASS/8.624907 : (Sub)Stellar companions of exoplanet hosts
(Michel+, 2021)
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- 68 F6.3 mas epsi Astrometric excess noise
70- 76 F7.4 mag Gmag G-band mean magnitude
78- 83 F6.4 mag e_Gmag Error of G-band mean magnitude
85- 90 F6.4 mag AG ? Estimate of G-band extinction
92- 98 F7.4 mag e_AG []? Lower Error of G-band extinction
100-106 F7.4 mag E_AG ? Upper Error of G-band extinction
108-110 A3 --- Note1 [SHC] SHC if AG is derived from the Starhorse
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- 65 F4.1 --- sDplx Significance of parallax difference
67- 69 F3.1 --- sDplx-epsi Significance of parallax difference
including epsi
71- 75 F5.2 mas/yr mu-rel Differential proper motion
77- 80 F4.2 mas/yr e_mu-rel Error of differential proper motion
82- 86 F5.1 --- smu-rel Significance of differential proper motion
88- 93 F6.1 --- 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 A1 --- l_Mass [~] Limit flag on Mass
61- 64 F4.2 Msun Mass Mass
66- 69 I4 K Teff ? Effective temperature
72- 74 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] 08-Jun-2023