J/AJ/113/401 UBV light curves of V417 Aql (Samec+ 1997)
U,B,V Light Curves of the Short-Period Solar-Type Eclipsing Binary, V417 Aquilae
Samec Ronald G., Pauley Brandy R., Carrigan Brian J.
<Astron. J. 113, 401 (1997)>
=1997AJ....113..401S 1997AJ....113..401S
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV
Abstract:
A complete photometric analysis of U,B,V photometry for the
short-period solar-type V417 Aquilae is presented. Seven epochs of
minimum light were determined from our observations covering two
primary and five secondary eclipses. A period study covering some
58,000 orbital cycles reveals two distinct eras of constant period
connected by what may be a smooth transition. The periods determined
for the two eras are nearly the same, differing by ∼0.16s. During the
intervening 23 years, a 0.1d jump in residuals takes place. The light
curves show that V417 Aql is a W-type W UMa system with a 25min time
of constant light in the primary minimum. The light curves are fairly
symmetrical. A simultaneous three-color solution was computed using
the Wilson synthetic light-curve code. Our photometry in conjunction
with the solution reveal that V417 Aql consists of G0 V and F9 V
spectral type components in contact with a 19% fill-out and a mass
ratio of 0.37. Its nearly equal eclipse depths, the low mass ratio,
and the moderate fill-out suggest that V417 Aql may be evolving into
an A-type W UMa binary.
(Copyright) 1997 American Astronomical Society.
Objects:
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RA (2000) DE Designation(s)
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19 35 24.0 +05 50 19 V417 Aql
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 20 2542 UBV-band observations of V417 Aql
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 11 F11.3 d HJD Heliocentric Julian Date
13 A1 --- Band [UBV] Band
15- 20 F6.3 mag dmag Delta magnitude
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Origin: AAS CD-ROM series, Volume 8, 1997 Lee Brotzman [ADS] 04-Apr-1997
(End) [CDS] 03-Jul-1997