J/AJ/150/1 Eclipse timings of 27 eclipsing binaries in the SMC (Hong+, 2015)
Apsidal motions of 27 binary systems in the Small Magellanic Cloud.
Hong K., Kim S.-L., Lee J.W., Lee C.-U., Yushchenko A.V., Kang Y.-W.
<Astron. J., 150, 1 (2015)>
=2015AJ....150....1H 2015AJ....150....1H
ADC_Keywords: Magellanic Clouds ; Binaries, eclipsing ; Reddening
Keywords: binaries: eclipsing - Magellanic Clouds - stars: early-type -
stars: fundamental parameters
Abstract:
We present the periods of apsidal motion for 27 early-type eclipsing
binaries with high eccentricity located in the Small Magellanic Cloud.
New times of minima were derived from the light curves constructed by
the MACHO, Optical Gravitational Lensing Experiment (OGLE)-II, and
OGLE-III survey data. The eclipse timing diagrams of the binary
systems were analyzed using those timings and the elements of apsidal
motions were obtained in detail for the first time. The apsidal motion
periods of all systems were estimated by detailed analysis of both
eclipse timings and light curves; a strong correlation value between
both methods is shown. We confirm that OGLE-SMC-ECL-2194 shows the
shortest known apsidal motion period of 7.1yr in a detached system
with main sequence stars. Nineteen systems show intermediate apsidal
motion periods between 10 and 100yr, and seven systems exhibit long
apsidal periods of more than 100yr.
Description:
All data used here were obtained from MACHO (1992-1999; Faccioli et
al. 2007, cat. J/AJ/134/1963), Optical Gravitational Lensing
Experiment (OGLE)-II (1997-2000; Wyrzykowski et al. 2004, cat.
J/AcA/54/1), and OGLE-III (2001-2009; Pawlak et al. 2013, cat.
J/AcA/63/323) with one meter class telescopes. The OGLE-II and
OGLE-III survey covered 2.4 and 14 square degrees, respectively, in
the SMC (Udalski et al., 1997AcA....47..319U 1997AcA....47..319U; Szymanski,
2005AcA....55...43S 2005AcA....55...43S; Udalski et al., 2008AcA....58...69U 2008AcA....58...69U). The 32
eccentric binary systems with apsidal motion were listed in the
OGLE-III catalog of eclipsing binaries detected in the SMC by Pawlak
et al. 2013 (cat. J/AcA/63/323). The apsidal motion binaries appear to
have eccentric orbits with a noticeable apsidal motion in their light
curves. Of those systems, we selected the 27 binary systems whose
light curves showed relatively small scatter. The basic parameters for
these stars are listed in Table1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 106 27 Basic parameters of 27 binary systems
table2.dat 24 27 Color excess
table5.dat 55 614 The list of eclipse timings of 27 binary systems
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See also:
J/AcA/54/1 : OGLE II SMC eclipsing binaries (Wyrzykowski+, 2004)
J/AJ/134/1963 : MACHO light curves of MC eclipsing binaries (Faccioli+, 2007)
J/AcA/63/323 : OGLE-III SMC eclipsing binary stars (Pawlak+, 2013)
J/AcA/54/1 : OGLE II SMC eclipsing binaries (Wyrzykowski+, 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 --- --- [OGLE-SMC-ECL-]
14- 17 I04 --- OGLE-III [781/6072] Optical Gravitational Lensing
Experiment (OGLE)-III identifier (G1)
19- 20 A2 --- --- [SC]
21- 22 I2 --- SC [3/11]? OGLE II SMC-SC field number (1)
24- 29 I6 --- OGLE-II [34110/311566]? Star number in the field (1)
31- 44 A14 --- MACHO MACHO identifier (Field.Tile.Sequence)
46- 47 I2 h RAh Hour of Right Ascension (J2000)
49- 50 I2 min RAm Minute of Right Ascension (J2000)
52- 56 F5.2 s RAs Second of Right Ascension (J2000)
58 A1 --- DE- Sign of the Declination (J2000)
59- 60 I2 deg DEd Degree of Declination (J2000)
62- 63 I2 arcmin DEm Arcminute of Declination (J2000)
65- 68 F4.1 arcsec DEs Arcsecond of Declination (J2000)
70- 75 F6.3 mag Imag [15.338/18.722] The I-band magnitude (2)
77- 80 F4.3 mag e_Imag [0.006/0.053] Uncertainty in Imag
82- 87 F6.3 mag Vmag [15.102/18.622]? The V-band magnitude (2)
89- 92 F4.3 mag e_Vmag [0.004/0.023]? Uncertainty in Vmag
94-100 F7.4 mag V-I [-0.237/0.06]? The (V-I) color index (2)
102-106 F5.4 mag e_V-I [0.0005/0.0038]? Uncertainty in V-I
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Note (1): See Udalski et al. 1998 (cat. J/AcA/48/147) and Wyrzykowski et al.
2004 (cat. J/AcA/54/1).
Note (2): Taken from the OGLE-III eclipsing binaries cataloged by Pawlak et al.
(2013, cat. J/AcA/63/323).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- --- [SMC-ECL-]
9- 12 I04 --- OGLE-III [781/6072] Optical Gravitational Lensing
Experiment (OGLE)-III identifier (G1)
14- 17 F4.2 mag E(B-V) [0.05/0.11] The (B-V) color excess (3)
19- 22 F4.2 mag E(V-I) [0.06/0.14] The (V-I) color excess (3)
24 I1 --- Ns [1/6] Number of sources
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Note (3): The statistical error and an additional systematic error for each
estimated reddening were assigned the value of 0.02mag.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- --- [OGLE-SMC-ECL-]
14- 17 I04 --- OGLE-III [781/6072] Optical Gravitational Lensing
Experiment (OGLE)-III identifier (G1)
19- 28 F10.4 d HJD [49363/54802] Heliocentric Julian Date of
observation (HJD-2400000)
30- 35 F6.4 d e_HJD [0.0004/0.0095] Timing error
37- 43 F7.1 --- Cycle [-4326/-40] Cycle number
45- 46 A2 --- Min Minimum type (I or II: non-integer cycle)
48- 55 A8 --- Source Observation source (MACHO, OGLE-II, OGLE-III) (1)
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Note (1): The data were obtained from:
MACHO = 1992-1999; Faccioli et al. 2007 (cat. J/AJ/134/1963);
OGLE-II = 1997-2000; Wyrzykowski et al. 2004 (cat. J/AcA/54/1);
OGLE-III = OGLE-III SMC eclipsing binaries catalog (Pawlak et al. 2013,
cat. J/AcA/63/323).
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Global notes:
Note (G1): In the OGLE-III SMC eclipsing binaries catalog (Pawlak et al. 2013,
cat. J/AcA/63/323). in Simbad.
History:
From electronic version of the journal
(End) Prepared by [AAS]; Sylvain Guehenneux [CDS] 09-Sep-2015