J/AJ/132/2489 Light curves of HD 71636 in B and V (Henry+, 2006)
HD 71636, a newly discovered eclipsing binary.
Henry G.W., Fekel F.C., Sowell J.R., Gearhart J.S.
<Astron. J., 132, 2489-2495 (2006)>
=2006AJ....132.2489H 2006AJ....132.2489H
ADC_Keywords: Binaries, eclipsing ; Photometry
Keywords: binaries: close - binaries: eclipsing - binaries: spectroscopic
Abstract:
Our differential BV photometric observations, acquired with an
automated telescope at Fairborn Observatory, show that HD 71636
is an eclipsing binary. From follow-up red-wavelength spectroscopic
observations we classify the primary and secondary as an F2 dwarf and
an F5 dwarf, respectively. The system has a period of 5.01329 days and
a circular orbit. We used the Wilson-Devinney program to
simultaneously solve our BV light curves and radial velocities and
determined a number of fundamental properties of the system.
Comparison with evolutionary tracks indicates that both stars are well
ensconced on the main sequence. The age of the system is about 1.2
billion years.
Description:
The photometric observations of HD 71636 in this paper are the same
observations that we acquired for Henry et al. (2005, Cat.
J/AJ/129/2815) with the T3 0.4m automatic photoelectric telescope
(APT) at Fairborn Observatory. In this paper, however, we included the
observations of HD 71636 when it was in eclipse, rather than
discarding them as we did in Henry et al. (2005, Cat. J/AJ/129/2815)
when we used HD 71636 as a comparison star. Thus, we have a total of
462 B and 456 V observations, all obtained with the T3 0.4 m APT
between 2002 September and 2003 May.
Objects:
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RA (2000) DE Designation(s)
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08 29 56.3 +37 04 15 HD 71636 = HIP 41691
08 19 31.8 +35 02 44 HD 69715 = HIP 40791
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 34 497 Photometric observations of HD 71636
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See also:
J/AJ/129/2815 : Eleven new γ Doradus variables (Henry+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 --- HJD Heliocentric Julian Date
15- 20 F6.4 --- Phase Orbital Phase (1)
22- 27 F6.3 mag DelB ?=99.999 HD71636-HD69715 differential
magnitude in B (2)
29- 34 F6.3 mag DelV ?=99.999 HD71636-HD69715 differential
magnitude in V (2)
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Note (1): Computed with the ephemeris in Section 6.
Note (2): The '99.999' signifies that the differential magnitude was discarded
because its internal standard deviation exceeded 0.01mag.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 25-Jul-2008