J/AN/341/996 Stellar companions of (C)TOIs (Mugrauer+, 2020)
Gaia Search for stellar Companions of TESS Objects of Interest.
Mugrauer M., Michel K.-U
<Astron. Nachrichten 341, 996-1030 (2020)>
=2020AN....341..996M 2020AN....341..996M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ;
Parallaxes, trigonometric ; Stars, masses
Keywords: binaries: visual - stars: imaging -
stars: individual: TOI249C, TOI1259B, TOI1624B, TOI1703B,
CTOI53309262B - white dwarfs
Abstract:
The first results of a new survey are reported, which explores the 2nd
data release of the ESA-Gaia mission, in order to search for stellar
companions of (Community) TESS Objects of Interest and to characterize
their properties. In total, 193 binary and 15 hierarchical triple star
systems are presented, detected among 1391 target stars, which are
located at distances closer than about 500pc around the Sun. The
companions and the targets are equidistant and share a common proper
motion, as it is expected for gravitationally bound stellar systems,
proven with their accurate Gaia astrometry. The companions exhibit
masses in the range between about 0.08M☉ and 3M☉ and
are most frequently found in the mass range between 0.13 and
0.6M☉. The companions are separated from the targets by about 40
up to 9900au, and their frequency continually decreases with
increasing separation. While most of the detected companions are late
K to mid M dwarfs, also 5 white dwarf companions were identified in
this survey, 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 142 429 Astro- & Photometry of (C)TOIs & Companions
table2.dat 93 221 Relative Astrometry of Companions
table3.dat 72 221 Equatorial Coordinates & Properties of Companions
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See also:
J/MNRAS/490/5088 : Stellar companions of exoplanet host stars (Mugrauer, 2019)
https://www.astro.uni-jena.de/Users/markus/Multiplicity_of_(C)TOIs.html :
Multiplicity of TOI
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
15 A1 --- n_Name [*] * for (C)TOIs
17- 23 F7.4 mas Plx Parallax
25- 30 F6.4 mas e_Plx Error of parallax
32- 39 F8.3 mas/yr pmRA Proper motion in right ascension
41- 45 F5.3 mas/yr e_pmRA Error of Proper motion in right ascension
47- 54 F8.3 mas/yr pmDE Proper motion in declination
56- 60 F5.3 mas/yr e_pmDE Error of proper motion in declination
62- 66 F5.3 mas epsi Astrometric excess noise
68- 74 F7.4 mag Gmag G-band mean magnitude
76- 81 F6.4 mag e_Gmag Error of G-band mean magnitude
83- 88 F6.4 mag AG ? Estimate of G-band extinction
90- 96 F7.4 mag e_AG []? Lower Error of G-band extinction
98-104 F7.4 mag E_AG ? Upper Error of G-band extinction
106 A1 --- Note1 [x] x if AG is derived from AV
108-110 A3 --- Note2 [SHC ] SHC if AG is from the Starhorse
catalogue
112-126 F15.11 deg RAdeg Right Ascension (ICRS) at Ep=2015.5
128-142 F15.11 deg DEdeg Declination (ICRS) at Ep=2015.5
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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
60- 63 F4.2 Msun Mass Mass
65- 69 I5 K Teff ? Effective temperature
71- 72 A2 --- Note [WD ] WD if Companion is a white dwarf
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Acknowledgements:
Markus Mugrauer, markus(at)astro.uni-jena.de
(End) Markus Mugrauer [AIU Jena], Patricia Vannier [CDS] 09-Mar-2021