J/other/JDSO/15.434 New Binary Systems from Data of Gaia DR2 (Romanov, 2019)
A catalog of new binary systems from data of Gaia DR2.
Romanov F.D.
<J. Double Star Obs., 15, 434-435 (2019)>
=2019JDSO...15..434R 2019JDSO...15..434R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ;
Stars, white dwarf ; Parallaxes, trigonometric
Keywords: Probably physical binary - White dwarfs
Abstract:
The author describes the discovery of 4 new pairs of stars with almost
identical proper motions and parallaxes (from Gaia DR2 data).
Description:
During the search for missed outbursts of cataclysmic variable stars,
I found new stars with visible proper motions in images from the
Digitized Sky Survey (DSS). I found 4 pairs of stars with almost
identical proper motions and parallaxes from the data of Gaia DR2
(Gaia Collaboration et al., 2018, Cat. I/345). It almost certainly
indicates they are gravitationally bound. There is no information
about these stars in past issues of the JDSO and in SIMBAD or in the
VizieR catalogs of double stars or of stars with high proper motions.
Table 1 shows the information (names added for
abbreviations in this paper, RBS means "Romanov - binary system")
about these stars (from Gaia DR2, sorted by right ascension):
RBS 1A - RBS 1B is the closest pair among those mentioned in this
paper. Stars RBS 3A and RBS 3B are present in the catalog of white
dwarfs (Fusillo et al., 2019, Cat. J/MNRAS/482/4570) therefore, most
likely, they are a binary system of white dwarfs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rbs.dat 119 8 New pairs of stars
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)
Byte-by-byte Description of file: rbs.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- RBS Romanov - binary system (RBS) (1A-1B to 4A-4B)
4- 22 I19 --- GaiaDR2 GAIA DR2 catalog ID (Cat. I/345)
(gaiadr2source_id)
24- 38 F15.11 deg RAdeg Right ascension (ICRS) at Ep=2015.5 (ra)
40- 45 F6.4 mas e_RAdeg Error of RA (e_ra)
47- 61 F15.11 deg DEdeg Declination (ICRS) at Ep=2015.5 (dec)
63- 68 F6.4 mas e_DEdeg Error of DE (e_dec)
70- 76 F7.4 mas Plx Parallax (plx)
78- 83 F6.4 mas e_Plx Error of parallax (e_plx)
85- 91 F7.3 mas/yr pmRA Proper motion RA (pmra)
93- 97 F5.3 mas/yr e_pmRA Error of pmRA (e_pmra)
99-105 F7.3 mas/yr pmDE Proper motion Dec (pmdec)
107-111 F5.3 mas/yr e_pmDE Error of pmDE (e_pmdec)
113-119 F7.4 mag Gmag G-band mean magnitude (Gmag)
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Acknowledgements:
Filipp Dmitrievich Romanov, filipp.romanov.27.04.1997(at)gmail.com
(End) Patricia Vannier [CDS] 04-Jul-2019