J/AN/342/840 Stellar companions of (C)TOIs (Mugrauer+, 2021)
Gaia Search for stellar Companions of TESS Objects of Interest II..
Mugrauer M., Michel K.-U.
<Astron. Nachrichten 342, 840-864 (2021)>
=2021AN....342..840M 2021AN....342..840M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ;
Parallaxes, trigonometric ; Stars, masses
Keywords: binaries: visual - stars: imaging -
stars: individual: TOI2092B, TOI2127B, CTOI253040591B, CTOI341411516B,
CTOI369376388C - white dwarfs
Abstract:
We present the latest results of our ongoing multiplicity study of
(Community) TESS Objects of Interest, using astro- and photometric
data from the ESA-Gaia mission, to detect stellar companions of these
stars and to characterize their properties. In total, 107 binary, 5
hierarchical triple star systems, as well as one quadruple system were
detected among 585 targets surveyed, which are all located at
distances closer than about 500pc around the Sun. As proven with their
accurate Gaia EDR3 astrometry, the companions and the targets are
located at the same distance and share a common proper motion, as it
is expected for components of gravitationally bound stellar systems.
The companions exhibit masses in the range between about 0.09M☉
and 4.5M☉ and are most frequently found in the mass range
between 0.15 and 0.6M☉. The companions are separated from the
targets by about 120 up to 9500au and their frequency is the highest
and constant within about 500au while it continually decreases for
larger separations. Beside mainly early to mid M dwarfs, also 5 white
dwarf companions were identified in this survey, whose true nature was
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 115 232 Astro- and Photometry of (C)TOIs & Companions
table2.dat 91 119 Relative astrometry of companions
table3.dat 73 119 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)
https://www.astro.uni-jena.de/Users/markus/Multiplicity_of_(C)TOIs.html
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Star name
17 A1 --- n_Name [*] * for (C)TOIs
19- 25 F7.4 mas Plx Parallax
27- 32 F6.4 mas e_Plx Error of parallax
34- 41 F8.3 mas/yr pmRA Proper motion in right ascension
43- 47 F5.3 mas/yr e_pmRA Error of proper motion in right ascension
49- 56 F8.3 mas/yr pmDE Proper motion in declination
58- 62 F5.3 mas/yr e_pmDE Error of proper motion in declination
64- 68 F5.3 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
112-115 A4 --- Note2 [SHC5] SHC5 if AG is from the Starhorse
catalogue for 5 surveys
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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- 23 F8.5 arcsec rho Angular separation
25- 31 F7.5 arcsec e_rho Error on angular separation
33- 41 F9.5 deg PA Position angle
43- 49 F7.5 deg e_PA Error of position angle
51- 54 F4.2 mas Dplx Parallax difference
56- 59 F4.2 mas e_Dplx Error of parallax difference
61- 64 F4.1 --- sDplx Significance of parallax difference
66- 68 F3.1 --- sDplx-epsi Significance of parallax difference
including epsi
70- 73 F4.2 mas/yr mu-rel Differential proper motion
75- 78 F4.2 mas/yr e_mu-rel Error of differential proper motion
80- 84 F5.1 --- smu-rel Significance of differential proper motion
86- 91 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=2016.0
32- 46 F15.11 deg DEdeg Declination (ICRS) at Ep=2016.0
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] 20-May-2021