J/AJ/166/218 New Gaia EDR3 binary candidates within 200pc of Sun (Medan+, 2023)
Detecting New Visual Binaries in Gaia DR3 with Gaia and Two Micron All Sky
Survey (2MASS) Photometry.
I. New Candidate Binaries within 200pc of the Sun.
Medan I., Lepine S.
<Astron. J., 166, 218 (2023)>
=2023AJ....166..218M 2023AJ....166..218M
ADC_Keywords: Stars, double and multiple; Photometry, VRI; Positional data
Keywords: Close binary stars ; Catalogs ; Visual binary stars
Abstract:
We present a method to identify likely visual binaries in Gaia eDR3
that does not rely on parallax or proper motion. This method utilizes
the various point-spread function sizes of Two Micron All Sky Survey
(2MASS)/Gaia, where at <2.5" two stars may be unresolved in 2MASS but
resolved by Gaia. Due to this, if close neighbors listed in Gaia are a
resolved pair, the associated 2MASS source will have a predictable
excess in the J band that depends on the ΔG of the pair. We
demonstrate that the expected relationship between 2MASS excess and
ΔG differs for chance alignments, as compared to true binary
systems, when parameters like magnitude and location on the sky are
also considered. Using these multidimensional distributions, we
compute the likelihood of a close pair of stars to be a chance
alignment, resulting in a total(clean) catalog of 68725(50230) likely
binaries within 200pc with a completeness rate of ∼75%(∼64%) and
contamination rate of ∼14%(∼0.4%). Within this, we find 590 previously
unidentified binaries from Gaia eDR3 with projected physical
separations <30au, where 138 systems were previously identified, and
for s<10au we find that 4 out of 15 new likely binaries have not yet
been observed with high-resolution imaging. We also demonstrate the
potential of our catalog to determine physical separation
distributions and binary fraction estimates, from this increase in
low-separation binaries. Overall, this catalog provides a good
complement for the study of local binary populations by probing
smaller physical separations and mass ratios, and provides prime
targets for speckle monitoring.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 206 235269 *All Gaia EDR3 red candidate binaries within 200pc
table2.dat 147 696 Gaia EDR3 stars within 200pc with L<0.00193; not in
a high contamination regions and having a projected
physical separation <30au
refs.dat 64 66 Refences used for table2
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Note on table1.dat: This table includes all candidate binaries. To get
the likely binaries, it is recommended to select binaries with
L<0.00193. Additionally, to get the clean sample where likely binaries
in high contamination regions are removed, select binaries with
L<0.00193 and Cideal<0.1. If users would like to make their own
quality cuts, all values of the contamination factor, L, and the
contamination rate per healpix bin calculated for an Lcut that selects
all candidates, Call, are provided in the table below for all
candidate binaries.
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See also:
B/simbad : Simbad objects catalogue (M.Wenger 2000)
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)
I/276 : Tycho Double Star Catalogue (TDSC) (Fabricius+ 2002)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)
J/AJ/106/352 : Speckle observations of binary stars VIII (Hartkopf+ 1993)
J/A+AS/106/377 : Double star measurements (Couteau+, 1994)
J/AJ/111/393 : Speckle observations of binary stars. XII (Al-Shukri+ 1996)
J/A+AS/126/1 : Double stars measurements (Gili+ 1997)
J/ApJS/117/587 : Observations of double stars. XVIII. (Heintz 1998)
J/A+AS/145/67 : Double stars measurements (Morlet+, 2000)
J/A+A/422/1023 : Nearby visual double stars UBVRI photo (Strigachev+, 2004)
J/AJ/135/1334 : Speckle interferometry at the USNO station (Hartkopf+, 2008)
J/AJ/138/813 : Speckle interferometry at Mount Wilson Obs (Hartkopf+, 2009)
J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)
J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)
J/AJ/141/45 : Speckle observations of HIP stars (Horch+, 2011)
J/AJ/142/46 : Speckle interferometry at USNO. XVII. (Mason+, 2011)
J/other/RMxAA/47.211 : Speckle interferometry at OAN. III. (Orlov+, 2011)
J/MNRAS/421/2498 : Stellar companions of exoplanet host stars (Ginski+, 2012)
J/AJ/143/42 : Speckle interferometry SOAR in 2010 & 2011 (Hartkopf+, 2012)
J/AJ/143/10 : 2008-2009 WIYN speckle obs of binaries. VII. (Horch+, 2012)
J/ApJ/754/44 : The AstraLux Large M-dwarf Survey (Janson+ 2012)
J/MNRAS/429/859 : New companions to nearby low-mass stars (Jodar+, 2013)
J/AJ/146/56 : Speckle interferometry at the USNO. XIX. (Mason+, 2013)
J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)
J/ApJ/789/102 : Properties of late M-dwarfs (Janson+, 2014)
J/AJ/150/151 : DSSI observations binaries V. Measures in2014 (Horch+, 2015)
J/AJ/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)
J/MNRAS/449/2618 : M-dwarfs in Multiples (MinMs) survey. I. (Ward-Duong+, 2015)
J/MNRAS/462/2295 : 25 parsec local white dwarf population (Holberg+, 2016)
J/AJ/153/212 : Obs of binary stars at the WIYN telescope (Horch+, 2017)
J/A+A/599/A70 : Young moving group M-dwarf multiplicity (Janson+, 2017)
J/MNRAS/480/4884 : Gaia wide binaries (El-Badry+, 2018)
J/A+A/619/A81 : Multiplicity among solar-type stars. IV. (Halbwachs+, 2018)
J/AJ/155/215 : Speckle interferometry of red dwarf stars (Mason+, 2018)
J/ApJ/877/60 : YMGs. I. Young binaries & lithium-rich stars (Bowler+, 2019)
J/A+A/623/A72 : Binarity of Hipparcos star Gaia pm anomaly (Kervella+, 2019)
J/AJ/157/211 : Unresolved binaries in TESS speckle imaging (Matson+, 2019)
J/AJ/158/167 : Speckle obs & orbits of multiple stars (Tokovinin+, 2019)
J/AJ/157/216 : Stellar multiplicity of Mdwarfs within25 pc (Winters+, 2019)
J/ApJS/247/66 : SUPERWIDE wide binaries in Gaia &SUPERBLINK (Hartman+, 2020)
J/AJ/159/233 : Observations of binary stars with DSSI. IX. (Horch+, 2020)
J/AJ/159/139 : Multiple Mdwarf stars with Robo-AO & GaiaDR2 (Lamman+, 2020)
J/AJ/160/7 : 2019 SOAR speckle interfero of bin stars (Tokovinin+, 2020)
J/AJ/160/215 : Solar neighborhood.XLVI. M dwarf binaries (Vrijmoet+, 2020)
J/ApJS/254/42 : Hipparcos-Gaia (EDR3) Catalog Accelerations (Brandt, 2021)
J/A+A/649/A6 : Gaia Catalogue Nearby Stars GCNS (Gaia collaboration, 2021)
J/MNRAS/508/3877 : Catalogue of white dwarfs in Gaia EDR3 (Gentile+, 2021)
J/AJ/161/295 : Obs. Differential Speckle Survey Instr. X. (Horch+, 2021)
J/AJ/162/53 : Speckle interferometry at the USNO. XXIV. (Mason+, 2021)
J/AJ/161/234 : 1.7 million K and M dwarfs cross-matching (Medan+, 2021)
J/AJ/162/156 : Speckle interfero. multiple stars. II (Mitrofanova+, 2021)
J/A+A/649/A3 : Gaia EDR 3 photometric passbands (Riello+, 2021)
J/AJ/162/102 : LASSO Robo-AO observation of 444 young stars (Salama+, 2021)
J/AJ/163/200 : Robo-AO of northern stars companions (Salama+, 2022)
J/AJ/163/178 : Solar Neighborhood. XLIV Mdwarfs with SOAR (Vrijmoet+, 2022)
J/AJ/165/180 : SOAR Speckle Survey hierarchical systems (Tokovinin, 2023)
J/AJ/165/193 : ∼30000 Gaia EDR3 nearby accelerating stars (Whiting+, 2023)
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- Source1 Gaia eDR3 source ID for primary star (1)
21- 39 I19 --- Source2 Gaia eDR3 source ID for secondary star
41- 55 F15.11 deg RAdeg [0/360] Right ascension of primary star
(ICRS at Epoch 2016.0)
57- 71 F15.11 deg DEdeg [-90/90] Declination of primary star
(ICRS at Epoch 2016.0)
73- 82 F10.4 as AngSep [0.18/2.5] Angular separation between primary
and secondary star
84-103 F20.16 mas Plx1 [5.0/250] Parallax of primary star Gaia EDR3
105-113 F9.3 mag Jmag1 [-0.37/18.33] J-band photometry from 2MASS
for primary star
115-123 F9.6 mag Gmag1 [2.51/21.18] G-band photometry from Gaia eDR3
for primary star
125-133 F9.6 mag BPmag1 [3.09/20.0] BP-band photometry from Gaia eDR3
for primary star
135-143 F9.6 mag RPmag1 [2.21/20.0] RP-band photometry from Gaia eDR3
for primary star
145-153 F9.6 mag Gmag2 [3.39/22.11] G-band photometry from Gaia eDR3
for secondary star
155-163 F9.6 mag BPmag2 [3.32/24.62]? BP-band photometry from
Gaia eDR3 for secondary star
165-173 F9.6 mag RPmag2 [2.92/22.23]? RP-band photometry from
Gaia eDR3 for secondary star
175-189 F15.12 --- C [0.0/2.643650134013] Contamination factor for
the binary
191-196 F6.3 --- C-ideal [-5.25/0.91] Estimation of contamination rate
within healpix for binary for the ideal cut
in contamination factor of L=0.00193
198-203 F6.3 --- C-all [-1.33/0.99] Estimation of contamination rate
within healpix for binary for the cut in
contamination factor that includes all
candidate binaries
205-206 I2 --- Bin [1/41]? Binary flag for candidate binary (2)
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Note (1): Primary stars = used to measure the G-J excess in the
probability distributions
Note (2): Flags as follow:
1 = Binary in low contamination region (<10%);
2 = Binary identified by El-Badry+, 2021MNRAS.506.2269E 2021MNRAS.506.2269E
4 = Binary identified as triple system with El-Badry+, 2021MNRAS.506.2269E 2021MNRAS.506.2269E
8 = Secondary has no parallax measurement in Gaia eDR3;
16 = Binary physical separation <30au with parallax error <5%;
32 = Binary physical separation <30au with parallax error >5%.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- Source1 Gaia eDR3 source ID for primary star
21- 39 I19 --- Source2 Gaia eDR3 source ID for secondary star
41- 60 A20 --- WDS Washington Visual Double Star catalog name
62- 76 F15.11 deg RAdeg [0/360] Right ascension of primary star
(ICRS at Epoch 2016.0)
78- 92 F15.11 deg DEdeg [-86/88] Declination of primary star
(ICRS at Epoch 2016.0)
94- 98 F5.2 au Sep [3.63/30] Projected physical separation between
stars based on parallax of primary star
100-108 F9.6 mag Gmag1 [3.43/20.16] G-band photometry from Gaia eDR3
for primary star
110-118 F9.6 mag BPmag1 [3.51/20.0] BP-band photometry from Gaia eDR3
for primary star
120-128 F9.6 mag RPmag1 [2.91/18.59] RP-band photometry from Gaia eDR3
for primary star
130-138 F9.6 mag Gmag2 [3.39/20.63] G-band photometry from Gaia eDR3
for secondary star
140-147 A8 --- Ref References for recent observations and/or
orbit determinations for binary system (3 max)
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref [1/66] Reference used
4- 23 A20 --- Author Main author
25- 43 A19 --- BIB BIBcode
45- 64 A20 --- Cat. Catalog in VizieR
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 09-Apr-2024