J/AcA/65/39 OGLE Galactic Bulge ultra-short-period binaries (Soszynski+, 2015)
Ultra-short-period binary systems in the OGLE fields toward the Galactic Bulge.
Soszynski I., Stepien K., Pilecki B., Mroz P., Udalski A., Szymanski M.K.,
Pietrzynski G., Wyrzykowski L., Ulaczyk K., Poleski R., Kozlowski S.,
Pietrukowicz P., Skowron J., Pawlak M.
<Acta Astron., 65, 39-62 (2015)>
=2015AcA....65...39S 2015AcA....65...39S (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Magnitudes
Keywords: binaries: eclipsing - stars: low-mass - novae, cataclysmic variables -
stars: individual: OGLE-BLG-ECL-000066
Abstract:
We present a sample of 242 ultra-short-period (Porb<0.22d) eclipsing
and ellipsoidal binary stars identified in the OGLE fields toward the
Galactic bulge. Based on the light curve morphology, we divide the
sample into candidates for contact binaries and non-contact binaries.
In the latter group we distinguish binary systems consisting of a cool
main-sequence star and a B-type subdwarf (HW Vir stars) and candidates
for cataclysmic variables, including five eclipsing dwarf novae. One
of the detected eclipsing binary systems - OGLE-BLG-ECL-000066 - with
the orbital period below 0.1d, likely consists of M dwarfs in a
nearly contact configuration. If confirmed, this would be the
shortest-period M-dwarf binary system currently known. We discuss
possible evolutionary mechanisms that could lead to the orbital period
below 0.1d in an M-dwarf binary.
Description:
The short-period eclipsing binary candidates were detected in the area
of 182 square degrees covering central regions of the Milky Way. The
I-band magnitudes in the OGLE-IV database range from about 13mag to
20.5mag.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 115 242 Observational parameters of ultra-short-period
eclipsing and ellipsoidal binary stars
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See also:
J/A+A/439/559 : OGLE eclipsing binaries (bulge+lmc+smc) (Groenewegen+, 2005)
J/A+A/572/A71 : Times of minima for 18 SMC eclipsing binaries (Zasche, 2014)
J/AcA/48/563 : BVI photometry of OGLE SMC eclipsing binaries (Udalski+, 1998)
J/AcA/53/1 : OGLE eclipsing binaries in LMC (Wyrzykowski+, 2003)
J/AcA/54/1 : OGLE II SMC eclipsing binaries (Wyrzykowski+, 2004)
J/AcA/61/103 : VI light curves of LMC eclipsing binaries (Graczyk+, 2011)
J/AcA/61/103 : VI light curves of LMC eclipsing binaries (Graczyk+, 2011)
J/AcA/62/33 : OGLEII detached red giant eclipsing binary twins (Nataf+, 2012)
J/AcA/63/115 : OLGE-III Galactic disk eclipsing binaries (Pietrukowicz+, 2013)
J/AcA/63/323 : OGLE-III SMC eclipsing binary stars (Pawlak+, 2013)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Star Star name
(OGLE-BLG-ECL-NNNNNN or OGLE-BLG-ELL-NNNNNN)
22- 37 A16 --- OGLE OGLE identifier (BLGFFF.FF.NNN)
40- 41 I2 h RAh Right ascension (J2000)
43- 44 I2 min RAm Right ascension (J2000)
46- 50 F5.2 s RAs Right ascension (J2000)
52 A1 --- DE- Declination sign (J2000)
53- 54 I2 deg DEd Declination (J2000)
56- 57 I2 arcmin DEm Declination (J2000)
59- 62 F4.1 arcsec DEs Declination (J2000)
64- 66 A3 --- Type Type of variability (1)
69- 74 F6.3 mag Imax Maximum I magnitude
76- 81 F6.3 mag Vmax ?=- Maximum V magnitude
83- 92 F10.8 d Porb Orbital period
94- 98 F5.3 mag AmpI1 Primary eclipse depth in I-band
100-104 F5.3 mag AmpI2 Secondary eclipse depth in I-band
106-115 F10.5 d Tmin Epoch of the primary eclipse minimum (HJD-2450000)
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Note (1): Type as follows:
C = contact binary
NC = non-contact binary
ELL = ellipsoidal variable
CV = cataclysmic variable
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History:
Copied at ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/blg/short_period_ecl/
(End) Patricia Vannier [CDS] 13-Jun-2016