J/MNRAS/492/L40 Disentangling cataclysmic variables in Gaia DR2 (Abril+, 2020)
Disentangling cataclysmic variables in Gaia's HR-Diagram.
Abril J., Schmidtobreick L., Ederoclite A., Lopez-Sanjuan C.
<Mon. Not. R. Astron. Soc. 492, L40-44 (2020)>
=2020MNRAS.492L..40A 2020MNRAS.492L..40A (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, cataclysmic ; Stars, distances ;
Parallaxes, trigonometric ; Proper motions ; Magnitudes
Keywords: Hertzsprung-Russell and colour-magnitude diagrams - novae -
cataclysmic variables
Abstract:
Cataclysmic Variables (CVs) are interacting binaries consisting of at
least three components that control their colour and magnitude.
Using Gaia we here investigate the influence of the physical
properties of these binaries on their position in the
Hertzsprung-Russell diagram (HR-diagram). The CVs are on average
located between the main sequence and the white dwarf regime, the
maximum density being at GBP-GRP~=0.56 and Gabs∼10.15. We nd a
trend of the orbital period with colour and absolute brightness: with
decreasing period, the CVs become bluer and fainter. We also identify
the location of the various CV sub-types in the HR-diagram and discuss
the possible location of detached CVs, going through the orbital
period gap.
Description:
Crossmatch of CVs with Gaia's parallaxes (Cat. I/345) and Bailer-Jones
(Cat. I/347) distances.
The Catalog and Atlas of Cataclysmic Variables (Downes et al.,
2001PASP..113..764D 2001PASP..113..764D, Cat. V/123) includes all objects which have been
classified as a CV at some point in time.
The Catalog of Cataclysmic Binaries, Low-Mass X-Ray Binaries and
Related Objects (Ritter & Kolb 2003A&A...404..301R 2003A&A...404..301R, Cat, B/cb) which
only contains objects with a measured period, is updated up to
December 31st, 2015 and it provides coordinates, apparent magnitudes,
orbital parameters, stellar parameters of the components and other
characteristic properties for 1429 CVs.
Both catalogues have been merged into a final sample of 1920 CVs, out
of which 1187 are contained in the GDR2 footprint.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 464 1198 Crossmatch of CVs with Gaia's parallaxes and
Bailer-Jones (Cat. I/347) distances
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
V/123 : Catalog of Cataclysmic Variables (Downes+ 2001-2006)
B/cb : Cataclysmic Binaries, LMXBs, and related objects (Ritter+, 2004)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Name, as in CV catalog (Name)
14- 33 A20 --- AltName Alternative name, as in CV catalog (AltName)
35- 51 F17.13 deg RAdeg Right Ascension (J2000) (ra_epoch2000)
53- 69 F17.13 deg DEdeg Declination (J2000) (dec_epoch2000)
71- 72 A2 --- Type1 CV subtype (Type1)
74- 75 A2 --- Type2 CV subtype (Type2)
77- 80 F4.1 mag mag1 ? Apparent magnitude at maximum brightness
from CV catalog (B/cb) (mag1)
82- 89 F8.6 d Orb.Per Orbital period from CV catalog (B/cb)
(Orb.Per)
91- 97 F7.2 yr Outburst ? Year of outburst from CV catalog (V/123)
(Outburst)
99-110 A12 --- MagRange Magnitude range from CV catalog (V/123)
(Mag.Range)
112-118 A7 --- SpType2 Spectral type of the secondary from CV
catalog (B/cb) (SpType2)
120-126 A7 --- SpType1 Spectral type of the primary from CV
catalog (B/cb) (SpType1)
128-146 I19 --- Source Gaia source identifier, identical to the
Gaia-DR2 source_id. (source_id)
148-162 F15.11 deg RAGdeg Gaia DR2 Right Ascension (ICRS) at Ep=2015.5
(ra_x)
164-170 F7.4 mas e_RAGdeg Gaia DR2 Standard error of right ascension
(ra_error)
172-186 F15.11 deg DEGdeg Gaia DR2 Declination (ICRS) at Ep=2015.5
(dec_x)
188-194 F7.4 mas e_DEGdeg Gaia DR2 Standard error of declination
(dec_error)
196-214 F19.13 pc rest Estimated distance from Bailer-Jones (I/347)
(rest_BailerJones)
216-234 F19.13 pc b_rest Lower bound on the confidence interval of the
estimated distance (I/347) (brestx)
236-254 F19.13 pc B_rest Upper bound on the confidence interval of the
estimated distance (I/347) (Brestxa)
256-272 F17.12 pc rlen Length scale used in the prior for the
distance estimation (I/347) (rlen)
274-280 F7.4 mas plx ? Gaia DR2 Parallax (parallax)
282-287 F6.4 mas e_plx ? Gaia DR2 Standard error of parallax
(parallax_error)
289-296 F8.3 mas/yr pmRA ? Gaia DR2 Proper motion in right ascension
direction, pmRA*cosDE (yr pmra)
298-302 F5.3 mas/yr e_pmRA ? Gaia DR2 Standard error of proper motion in
right ascension direction (pmra_error)
304-311 F8.3 mas/yr pmDE ? Gaia DR2 Proper motion in declination
direction (pmdec)
313-317 F5.3 mas/yr e_pmDE ? Gaia DR2 Standard error of proper motion in
declination direction (yr pmdec_error)
319-330 F12.4 e-/s FG Gaia DR2 G-band mean flux (photgmean_flux)
332-343 F12.6 e-/s e_FG Gaia DR2 Error on G-band mean flux
(photgmeanfluxerror)
345-353 F9.6 mag Gmag Gaia DR2 G-band mean magnitude
(photgmean_mag)
355-374 F20.17 mag GMAG Absolute magnitude (gmagabs) (1)
376-387 F12.4 e-/s FBP ? Gaia DR2 Integrated BP mean flux
(photbpmean_flux)
389-400 F12.6 e-/s e_FBP ? Gaia DR2 Error on the integrated BP mean
flux (photbpmeanfluxerror)
402-410 F9.6 mag BPmag ? Gaia DR2 Integrated BP mean magnitude
(photbpmean_mag)
412-423 F12.4 e-/s FRP ? Gaia DR2 Integrated RP mean flux
(photrpmean_flux)
425-436 F12.6 e-/s e_FRP ? Gaia DR2 Error on the integrated RP mean
flux (photrpmeanfluxerror)
438-446 F9.6 mag RPmag ? Gaia DR2 Integrated RP mean magnitude
(photrpmean_mag)
448-456 E9.6 mag BP-RP ? Gaia DR2 BP-RP colour (bp_rp)
458-464 F7.2 K Teff ? Gaia DR2 Stellar effective temperature
(teff_val)
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Note (1): Absolute magnitudes computed from Bailer-Jones (Cat. I/347) distances.
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Acknowledgements:
Javier Abril, jabrilib(at)eso.org
(End) Patricia Vannier [CDS] 10-Dec-2019