J/AZh/84/695 An SX Phoenicis Variable light curve (Kim+, 2007)
Photometric study of an SX Phoenicis Variable in the Galactic Halo.
Kim C., Jeon J.-B., Kim S.-L, Yushchenko A.V.
<Astron. Zh. 84, 695 (2007)>
=2007AZh....84..695K 2007AZh....84..695K
=2007ARep...51..624K 2007ARep...51..624K
ADC_Keywords: Stars, variable; Photometry
Abstract:
We present investigation of V=17mag star, which appears to be SX Phe
type variable. Observations at 1.8 and 1.0 meter telescopes of
Boyhunsan and Mount Lemon observatories permit us to improve the light
elements and to investigate the power spectrum. We applied a Fourier
decomposition to the data in order to determine the component
frequencies of the synthetic light curve, and five components
including a pair of closely separated components of f1=24.6539 and
f2=24.8173 c/d were identified. We proposed that one of these two
components corresponds to a non-radial oscillation mode. Other
observed frequencies are the combinations of the first two.
Metallicity of the star was estimated to be [Fe/H]←2. We also found
that one of the faint variable stars, No. 14, in the field is RRc type
pulsator.
Objects:
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RA (2000) DE Designation(s) (files)
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14 10 57.1 +53 13 36 2-7-0122 = [EHV2002] 2-7-0122 (table1.dat)
14 10 57.3 +53 11 50 No. 14 = USNO-B1.0 1431-0280453 (table4.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 19 1310 Observations of 2-7-0122 (P=0.04056150)
table4.dat 19 246 Observations of star No. 14 (P=0.358)
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Byte-by-byte Description of file: table1.dat table4.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD [2453004/2453144] Julian date
15- 19 F5.3 mag Vamp Amplitude in V band (Vmag-Vmean) (1)
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Note (1): Where mean magnitude is Vmag=17.3 for 2-7-0122 star.
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(End) Veta Avedisova (INASAN) 03-May-2009