J/AZh/97/733 Binary Star Pop. with Common Proper Motion (Sapozhnikov+, 2020)
Binary Star Population with Common Proper Motion in Gaia DR2.
Sapozhnikov S.A., Kovaleva D.A., Malkov O.Yu., Sytov A.Yu.
<Astron. Zh. 97, 733 (2020)>
=2020AZh....97..733S 2020AZh....97..733S (SIMBAD/NED BibCode)
=2020ARep...64..756S 2020ARep...64..756S
ADC_Keywords: Stars, double and multiple; Positional data; Photometry; Optical;
Radial velocities
Keywords: Binary stars - Visual binary stars - Astrometric binary stars -
Comoving stars - Astrostatistics
Description:
We describe a homogeneous catalog compilation of common proper motion
stars based on GaiaDR2. A preliminary list of all pairs of stars
within the radius of 100pc around the Sun with a separation less than
a parsec was compiled. Also, a subset of comoving pairs, wide binary
stars, was selected. The clusters and systems with multiplicity larger
than 2 were excluded from consideration. The resulting catalog
contains 10358 pairs of stars. The catalog selectivity function was
estimated by comparison with a set of randomly selected field stars and
with a model sample obtained by population synthesis. The estimates of
the star masses in the catalogued objects, both components of which
belong to the main-sequence, show an excess of ''twins'', composed by
stars with similar masses. This excess decreases with increasing
separation between components. It is shown that such an effect cannot
be a consequence of the selectivity function only and does not appear
in the model where star formation of similar masses is not
artificially preferred. The article is based on the talk presented at
the conference ''Astrometry yesterday, today, tomorrow'' (Sternberg
Astronomical Institute of the Moscow State University, October 14 -
16, 2019).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 337 9977 Catalog
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/139/2566 : SLoWPoKES catalog (Dhital+, 2010)
J/AJ/157/78 : Multiple star systems from GaiaDR2
(Jimenez-Esteban+, 2019)
J/other/JDSO/15.434 : New Binary Systems from Data of Gaia DR2 (Romanov, 2019)
J/ApJS/246/4 : Catalog of ultrawide binary stars from Gaia DR2
(Tian+, 2020)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- Gaia1 Gaia DR2 identifier of primary component
21- 39 I19 --- Gaia2 Gaia DR2 identifier of secondary component
41 I1 --- Type1 [0/2] Main component star type (1)
43 I1 --- Type2 [0/2] Secondary component star type (1)
45- 61 F17.12 arcsec Sep [1.5/4347] Angular separation between the
two stars
63- 70 F8.1 AU PSepau [21/200257] Projected physical separation
between the two stars
72- 79 F8.1 AU P3DSep [21/206230] Physical separation between
stars in 3d space
81- 89 F9.6 mas/yr pmDIFF [0/61] Relative proper motion between the
two stars
91- 97 F7.5 km/s PRVel [0/10] Projected relative velocity between the
two stars
99-122 E24.17 J UbindJ ? Binding energy estimation for MS pairs
124-145 E22.17 J EkinJ ? Kinetic energy estimation for MS pairs
147-162 F16.12 deg RAdeg Main component right ascension (ICRS)
at Ep=2015.5
164-179 F16.12 deg DEdeg Main component declination (ICRS) at Ep=2015.5
181-196 F16.12 deg RA2deg Secondary component right ascension (ICRS)
at Ep=2015.5
198-213 F16.12 deg DE2deg Secondary component declination (ICRS)
at Ep=2015.5
215-220 F6.2 Msun Mass1 ? Main component mass for MS stars
222-227 F6.2 Msun Mass2 ? Secondary component mass for MS stars
229-235 F7.4 mas Plx1 Main component parallax
237-243 F7.4 mas Plx2 Secondary component parallax
245-250 F6.3 mag Gmag1 Main component G-band mean magnitude
252-257 F6.3 mag Gmag2 Secondary component G-band mean magnitude
259-264 F6.4 mas e_Plx1 Main component parallax standard error
266-271 F6.4 mas e_Plx2 Secondary component parallax standard error
273-284 F12.6 mas/yr pmRA1 Main component right ascension proper motion,
pmRA*cosDE
286-297 F12.6 mas/yr pmDE1 Main component right declination proper motion
299-310 F12.6 mas/yr pmRA2 Secondary component right ascension proper
motion, pmRA*cosDE
312-323 F12.6 mas/yr pmDE2 Secondary component declination proper motion
325-330 F6.3 mag BP-RP1 Main component BP-RP color
332-337 F6.3 mag BP-RP2 Secondary component BP-RP color
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Note (1): Star typed are determined by their position on color-magnitude
diagram and are defined as follows:
1 = Main-sequence star
2 = White dwarf
0 = Not associated with either MS or WD region
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Acknowledgements:
S. A. Sapozhnikov
(End) Patricia Vannier [CDS] 12-Oct-2020