J/AJ/149/48 BVRI light curves of ZZ Eri (Samec+, 2015)
Analysis of the southern pre-contact W UMa binary ZZ Eridani: a 34 year period
study yields a possible low-mass companion.
Samec R.G., Clark J.D., Van Hamme W., Faulkner D.R.
<Astron. J., 149, 48 (2015)>
=2015AJ....149...48S 2015AJ....149...48S
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: binaries: close - binaries: eclipsing - stars: evolution -
stars: individual: ZZ Eri
Abstract:
Complete Bessel BVRI light curves of ZZ Eri [2MASSJ04130109-1044545,
HV 6280, NSVS 14888164; IRCS position 04:13:01.10-10:44:54.5;
V=13.9-14.4-15.0] are observed and analyzed. The system is a southern
pre-contact W UMa binary. Its light curve has the appearance of an
Algol (EA) light curve, however, it is made up of dwarf solar-type
components with a period of only 0.4521days. Our 34year period study
yields a sinusoidal fit or an increasing quadratic fit. The sinusoid
may indicate that a third body is orbiting the close binary. The
lower-limit mass of the third body is near that of the brown dwarf
limit (0.095M☉). Also included is an improved ephemeris, a mass
ratio search, and a simultaneous BVRI Wilson-Devinney solution.
Description:
Observations were taken with the Southeastern Association for Research
in Astronomy (SARA South) Telescope at Cerro Tololo InterAmerican
Observatory in remote mode. The 0.6m F/11 reflector was used on six
nights, 2012 October 10 and 16; November 12, 13, and 17; and December
20, with the QSI 683s camera cooled to -25°C.
Objects:
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RA (ICRS) DE Designation(s) (Period)
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04 13 01.10 -10 44 54.5 V* ZZ Eri = NSVS 14888164 (P=0.452048)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 15 1187 Photometry of ZZ Eri
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
J/AJ/147/3 : BV(RI)c light curves of V2421 Cyg (Samec+, 2014)
J/AJ/145/14 : BV(RI)c light curves of V1043 Cas (Samec+, 2013)
J/PASP/124/693 : HO Psc UBV(RI)c light curves (Samec+, 2012)
J/A+A/446/785 : Catalogue of eclipsing variables (Malkov+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Flt [BVRI] Filter (Bessel BVRI)
3- 7 F5.3 mag Dmag [0.7/2.057] Δ magnitude in Flt (1)
9- 15 F7.4 d HJD [10.7657/64.8689] Heliocentric Julian Date
(HJD-2456200)
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Note (1): In the sense of variable minus comparison star (GSC 5315 1020;
R.A.=04h13m1.807s, Dec=-10°46'33.94''; J-K=0.36mag, V=12.86mag).
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History:
From electronic version of the journal
(End) Sylvain Guehenneux [CDS] 20-Feb-2015