J/AJ/131/2986 Multiplicity of contact binaries (Pribulla+, 2006)
Contact binaries with additional components. I. The extant data.
Pribulla T., Rucinski S.M.
<Astron. J., 131, 2986-3007 (2006)>
=2006AJ....131.2986P 2006AJ....131.2986P
ADC_Keywords: Stars, double and multiple ; Stars, variable ; Binaries, eclipsing
Keywords: binaries: close - binaries: eclipsing - stars: variables: other
Abstract:
We have attempted to establish observational evidence for the presence
of distant companions that may have acquired and/or absorbed angular
momentum during the evolution of multiple systems, thus facilitating
or enabling the formation of contact binaries. In this preliminary
investigation we use several techniques (some of them distance-
independent) and mostly disregard the detection biases of individual
techniques in an attempt to establish a lower limit to the frequency
of triple systems. While the whole sample of 151 contact binary stars
brighter than Vmax=10mag gives a firm lower limit of 42%±5%, the
corresponding number for the much better observed northern-sky
subsample is 59%±8%. These estimates indicate that most contact
binary stars exist in multiple systems.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 181 Multiplicity of contact binary stars: summary data
table3.dat 80 72 Notes on selected contact binaries
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See also:
B/wds : The Washington Visual Double Star Catalog
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/250 : Combined General Catalogue of Variable Stars (Samus+ 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name The General Catalog of Variable Stars name
(Cat. II/250) (1)
11 A1 --- n_Name [*] Indicates a note detailed in table3
13- 17 F5.2 mag Vmag Johnson or transformed Hipparcos Hp maximum
magnitude
19- 28 A10 --- WDS Washington Double Star catalogue designation
(Cat. B/wds) (2)
30- 32 I3 deg PA ? Position angle of the secondary/fainter
component
34- 38 F5.2 arcsec Sep ? Angular separation of the components (3)
40- 44 I5 AU d ? Projected separation (4)
46 A1 --- f_d [*] Flag for large uncertainty on d (5)
48- 51 F4.2 mag DelV ? Visual brightness difference of
components (6)
53 A1 --- H59 [CGX] Hipparcos multiple system flag H59 (7)
54 A1 --- H61 [ABCS] Hipparcos solution quality flag H61 (8)
56- 59 F4.2 mas e_pi ? Hipparcos parallax error
61- 64 F4.2 mas/yr e_mu ? Proper-motion error in TYCHO 2 catalog
(Cat. I/259) (9)
66- 69 F4.2 --- beta ? Ratio of apparent luminosities (10)
71- 73 I3 km/s dRV ? Difference of third component velocity and
systemic velocity of the underlying binary
75 A1 --- f_dRV [vs] Flag on dRV variability (11)
77- 78 I2 --- P3 ? Orbital period of the third component as
determined from LITE
80- 82 F3.1 AU asin(i) ? Projected semi-major axis of the eclipsing
pair (12)
84- 88 F5.2 mag dB-V ? Difference between TYCHO-2 B-V color and
the short-period, blue envelope (SPBE)
(see the text)
90- 94 F5.2 [-] logFX/Fbol ? Log of the RASS X-ray flux to the
bolometric flux (see Section 4.3)
96 A1 --- Occ [M] Indicates a Moon occultation (13)
98 A1 --- F1 [DPN] Visual binary present in the WDS catalog
flag (14)
99 A1 --- F2 [DPN-] CFHT Adaptative Optics observations
flag (14)
100 A1 --- F3 [DSN-] Hipparcos Catalog flags (15)
101 A1 --- F4 [SN-] σµ flag (16)
102 A1 --- F5 [DSN-] Spectroscopic detection (17)
103 A1 --- F6 [DSN-] Light-time effect (LITE) indication (18)
104 A1 --- F7 [SN-] Short-period, blue envelope (SPBE)
indication (19)
105 A1 --- F8 [LEN] RASS (IX/10,IX/29) X-ray to visual
flux ratio flag (20)
107-109 F3.1 --- W Combined weight (21)
111 A1 --- T3 [Y] Final evaluation of triplicity (22)
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Note (1): Systems without GCVS designations:
V2 Mon = TYC 4824-00153-1,
V3 Mon = TYC 4835-01947-1,
V2 Peg = TYC 1720-00658-1.
Note (2): Designation of the system (if it is visual binary or common
proper-motion pair) in the most recent on-line version of the catalog
(http://ad.usno.navy.mil/wds/wds.html) or CFHT indicating a new
detection, as given in Table 4.
Note (3): Angular separation of components of LL Vel is <0.03".
Note (4): Computed from angular separation and Hipparcos parallax.
Note (5): A "*" indicates a relative error of parallax larger than 0.2 or a
negative parallax, the distance estimated using absolute magnitude
calibration of Rucinski & Duerbeck (1997PASP..109.1340R 1997PASP..109.1340R) or estimated
otherwise (see text).
Note (6): Visual brightness difference of components of ES Lib is not given
in the WDS catalogue.
Note (7): H59 Hipparcos flag represents the type of astrometric solution,
defined as follows:
C = linear motion,
G = acceleration term necessary (i.e. very probably an astrometric binary)
X = stochastic solution (i.e. very probably an astrometric binary with
P<3years);
Note (8): H61 Hipparcos flag represents the quality of the orbital solution:
grades ABCD (A=best) or suspected non-single flag S.
Note (9): e_mu = sqrt[(σ(µα)cos(δ)2
+σ2(µδ)].
Note (10): l3/(l1+l2) determined from broadening functions (see the text).
Note (11): Flag on DelRV as follows:
v = variable velocity;
s = similar velocity.
Note (12): Around the common center of gravity determined using the LITE.
Note (13): Occultation within 5°9' from the ecliptic.
Note (14): Flags as follows:
D = for systems with projected separation less than 2000AU,
P = for systems with separation between 2000 and 20000AU,
N = system not present in WDS or with separation larger than 20000AU.
- = system not observed.
Note (15): Hipparcos Catalog flags as follows:
N = no detection
- = not observed or insufficient data
D = if X or G in H59,
S = if S or C in H61. (Three systems not recognized before as the "S" cases,
but having parallax errors larger than 3σ relative to the error
median, have been added here: UX Eri, V1363 Eri, DY Cet.)
Note (16): The proper-motion error is defined as follows:
S = if proper-motion error higher than 3-σ from the median.
N = no detection
- = not observed or insufficient data
Note (17): Spectroscopic detection as follows:
D = detection in broadening functions or through spectral features
N = no detection in broadening functions or through spectral features
- = not observed or insufficient data
S = large changes of systemic velocity
Note (18): LITE indication, defined as follows:
D = a stable orbit with more than 1.5 cycles covered,
S = a somewhat unstable solution or less than 1.5 cycles covered,
N = no detection
- = fewer than 25 pe or CCD minima or the interval of observations <10yr.
Note (19): SPBE indication, defined as follows:
S = if the system is bluer than the corresponding blue envelope color.
N = no detection
- = not observed or insufficient data
Note (20): RASS X-ray to visual flux ratio, defined as follows:
L = when a late-type companion is indicated by a large logX ratio in
an early-type contact binary,
E = when the ratio is below the lower envelope of detection limit
indicating an early-type third component.
N = no detection
Note (21): The sum of weights of individual detection techniques (any
detection counts with weight 1.0, any possibility or suspicion with 0.5)
Note (22): A "Y" (=Yes) indicates the sum of weights is ≥ 1.0
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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- 9 A9 --- Name The General Catalog of Variable Stars name
(Cat. II/250)
11- 80 A70 --- Note Text of note
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History:
From electronic version of the journal
References:
D'Angelo et al., Paper II 2006AJ....132..650D 2006AJ....132..650D
Rucinski et al., Paper III 2007AJ....134.2353R 2007AJ....134.2353R
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 16-Jul-2008