J/AN/343/24017 Stellar companions of (C)TOIs (Mugrauer+, 2022)
Gaia Search for stellar companions of TESS Objects of Interest III.
Mugrauer M., Zander J., Michel K.-U.
<Astron. Nachr. 343, e202224017 (2022)>
=2022AN....34324017M 2022AN....34324017M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ;
Parallaxes, trigonometric ; Stars, masses
Keywords: binaries: visual - stars: imaging -
stars: individual: TOI388B, TOI2380B, TOI2486C, CTOI161478895A -
white dwarfs
Abstract:
The latest results from our ongoing multiplicity study of (Community)
TESS Objects of Interest are presented, using astro- and photometric
data from the ESA-Gaia mission, to detect stellar companions of these
stars and characterize their properties. A total of 124 binary and 7
hierarchical triple star systems were detected among 2175 targets,
whose multiplicity was investigated in the course of our survey, which
are located at distances closer than about 500 pc around the Sun. The
detected companions and the targets are located at the same distance
and share a common proper motion, as expected for components of
gravitationally bound stellar systems, as proven with their accurate
Gaia EDR3 astrometry. The companions have masses in the range between
about 0.09 and 2.5M☉ and are most frequently found in the mass
range between 0.15 and 0.8M☉. The companions exhibit projected
separations to the targets between about 50 to 9700au and their
frequency is the highest and constant up to about 500au, while it
decreases for larger projected separations. In addition to mainly mid
M to early K dwarfs, 4 white dwarf companions were detected in this
survey, whose true nature could be identified with 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 111 269 Astro- & Photometry of (C)TOIs & Companions
table2.dat 93 137 Relative Astrometry of Companions
table3.dat 73 137 Equatorial Coordinates & 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/other/FrASS/8.624907 : (Sub)Stellar companions of exoplanet hosts
(Michel+ 2021)
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
99-105 F7.4 mag E_AG ? Upper Error of G-band extinction
107-109 A3 --- Note1 [SHC] SHC if AG is derived from the Starhorse
catalogue
111 A1 --- Note2 [x] x if AG is derived from AV
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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 G magnitude
54- 57 I4 au Sep Projected separation
59 A1 --- l_Mass [~] Limit flag on Mass
61- 64 F4.2 Msun Mass ? Mass
66- 70 I5 K Teff ? Effective temperature
72- 73 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] 04-Jul-2022