J/ApJ/629/1055 Evolution of close binary systems (Yakut+, 2005)
Evolution of close binary systems.
Yakut K., Eggleton P.P.
<Astrophys. J., 629, 1055-1074 (2005)>
=2005ApJ...629.1055Y 2005ApJ...629.1055Y
ADC_Keywords: Binaries, eclipsing
Keywords: binaries: close - binaries: eclipsing - stars: evolution -
stars: fundamental parameters
Abstract:
We collect data on the masses, radii, etc., of three classes of close
binary stars: low-temperature contact binaries (LTCBs), near-contact
binaries (NCBs), and detached close binaries (DCBs). We restrict
ourselves to systems in which (1) both components are, at least
arguably, near the main sequence, (2) the periods are less than a day,
and (3) there is both spectroscopic and photometric analysis leading
to reasonably reliable data. We discuss the possible evolutionary
connections between these three classes, emphasizing the roles played
by mass loss and angular momentum loss in rapidly rotating cool stars.
We describe a new mechanism, differential rotation as observed in the
Sun, which can explain the remarkable efficiency of heat transport in
the outer envelopes of contact binaries.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 72 Physical parameters of well-determined
low-temperature contact binaries (LTCBs)
table2.dat 108 25 Some near-contact binaries (NCBs)
table3.dat 98 11 Some detached close binaries (DCBs)
refs.dat 96 117 References
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See also:
V/119 : Catalogue of field contact binary stars (Pribulla+, 2003)
J/A+A/426/1001 : Catalog of contact binary stars (Csizmadia+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Source name
15- 16 A2 --- CBt [A W:] Contact binary subtype (A or W) according
to Binnendijk (1970VA.....12..217B 1970VA.....12..217B)
18- 23 A6 --- SpT1 Spectral type mentioned in the literature
25- 29 A5 --- SpT2 Spectral types of the components based on
Popper's (1980ARA&A..18..115P 1980ARA&A..18..115P) calibration of
spectral type against temperature
31- 36 F6.4 d Per [0.22/0.81] Period
38- 41 I4 K T1 Effective temperature of the primary
43- 46 I4 K T2 Effective temperature of the secondary
48- 51 F4.2 Msun M1 Mass of the primary
53- 56 F4.2 Msun M2 Mass of the secondary
58- 61 F4.2 Rsun R1 Radius of the primary
63- 66 F4.2 Rsun R2 Radius of the secondary
68- 72 F5.2 Lsun L1 Luminosity of the primary (1)
74- 78 F5.2 Lsun L2 Luminosity of the secondary (1)
80- 84 F5.3 --- f [0/1]? Overfill factor (2)
86- 91 F6.3 --- X1 X1=ln(R1/RL1), fraction of Roche lobe radius
93- 98 F6.3 --- X2 X2=ln(R2/RL2), fraction of Roche lobe radius
100-112 A13 --- Ref References, detailed in refs.dat
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Note (1): Luminosities are calculated from the radii and temperatures by
Li/L☉=(Ri/R☉)2(Ti/5780)4,
where suffix i refers to either component of the system.
Note (2): f=(Φ-Φ(IL))/(Φ(OL)-Φ(IL)), where Φ is the
(dimensionless) potential on the joint surface of the star, and
Φ(IL), Φ(OL) are the potentials of the inner and outer
critical lobes, respectively.
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Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Source name
11- 13 A3 --- Type Type: C=Contact, SD=semi-detachedn D=detached
15- 20 F6.4 d Per [0.26/0.92] Period
22- 26 A5 --- SpT Spectral type, as inferred from the temperature
of the primary Popper (1980ARA&A..18..115P 1980ARA&A..18..115P)
28- 31 F4.2 Msun M1 [0.6/3.1] Mass of primary
33- 36 F4.2 Msun M2 [0.2/1.7] Mass of secondary
38- 41 F4.2 Rsun R1 Radius of primary
43- 46 F4.2 Rsun R2 Radius of secondary
48- 52 I5 K T1 [3800/11200] Effective temperature of primary
54- 57 I4 K T2 [3800/6300] Effective temperature of secondary
59- 63 F5.2 Lsun L1 Luminosity of primary
65- 68 F4.2 Lsun L2 Luminosity of secondary
70- 75 F6.3 --- X1 X1=ln(R1/RL1), fraction of Roche lobe radius
77- 82 F6.3 --- X2 X2=ln(R2/RL2), fraction of Roche lobe radius
84- 88 F5.1 Myr tP ? Observed timescale of period change (2)
90-108 A19 --- Ref References, detailed in refs.dat
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Note (2): Alternative interpretations are possible.
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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- 4 A4 --- Ref Reference code
6- 24 A19 --- Bibcode Bibcode
26- 54 A29 --- Aut Author's name
56-135 A80 --- Com Comment
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History:
* 27-Dec-2005: From electronic version of the journal
* 19-Jan-2015: Changed name "XY Leo A" into "XY Leo" in table1.dat
(End) Marianne Brouty [CDS] 27-Dec-2005