J/AJ/144/136 BV light curves of the Algol-type binary V1241 Tauri (Yang+, 2012)
Photometric properties for selected Algol-type binaries. V. V1241 Tauri.
Yang Y.-G., Zhang X.-B., Li H.-L., Dai H.-F.
<Astron. J., 144, 136 (2012)>
=2012AJ....144..136Y 2012AJ....144..136Y
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV
Keywords: binaries: close - binaries: eclipsing - stars: individual: V1241 Tau
Abstract:
We present new photometry for the eclipsing binary V1241 Tau, which
was obtained on six nights between 2011 December and 2012 January
using the 85cm telescope at the Xinglong station of the National
Astronomical Observatories of China. By using the updated
Wilson-Devinney code, photometric models with third lights were
deduced from two sets of light curves. The result implies that V1241
Tau is an Algol-type near-contact binary (NCB), whose mass ratio and
filling-out of the primary are q=0.545(±0.003) and f1=82.4%
(±0.2%), respectively. Based on all available times of minimum light
spanning over 80yr, the O-C curve of V1241 Tau appears to show a
quasi-sinusoidal oscillation, i.e., a light-time orbit. The modulated
period and amplitude are Pmod=47.4(±1.7)yr and
A=0.0087(±0.0005)days, respectively. This kind of period variation
may be more likely attributed to the light-time effect via a presence
of an unseen third body. From an analysis of 23 Algol-type NCBs with
EB-type light curves, we determine that the fill-out for the primary
f1 will increase as the orbital period P decreases. With angular
momentum loss, the orbit of the binary will shrink, which causes f1
to increase. The primary component finally fills its Roche lobe, and
the binary evolves into contact configuration. Therefore, this kind of
Algol-type NCB with EB-type light curves, such as V1241 Tau, may be a
progenitor of the A-type W UMa binary.
Description:
On six nights between 2011 December 25 and 2012 January 2, V1241 Tau
was observed using the 85cm telescope at Xinglong station of the
National Astronomical Observatories of China (NAOC). A PI 1024*1024
CCD photometric system is situated at the prime focus of this
telescope. The standard Johnson-Cousin-Bessel set of BVRI filters
was used.
Objects:
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RA (2000) DE Designation(s) (Period)
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03 24 23.25 -00 42 14.9 V1241 Tauri = V* WX Eri (P=0.82327065)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 39 1192 BV observations for the eclipsing binary V1241 Tau
table3.dat 49 173 All available times of minimum light for V1241 Tau
refs.dat 78 78 References
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2013)
V/115 : Semi-detached eclipsing binaries (Surkova+, 2004)
V/124 : Approximate elements of eclipsing binaries (Svechnikov+, 1990)
J/AN/334/860 : Catalogue of eclipsing variables. Ver. 2
(Avvakumova+, 2013)
J/AJ/144/50 : Light curves of AV Hya and DZ Cas (Yang+, 2012)
J/AJ/143/13 : Light curves of AL Gem and BM Mon (Yang+, 2012)
J/other/IBVS/5984 : Minima and maxima of 503 variables (Hubscher, 2011)
J/AJ/139/1360 : AO Ser VR light curves (Yang+, 2010)
J/AJ/140/1687 : RZ Dra BVR light curves (Yang+, 2010)
J/MNRAS/405/1930 : Period changes of EA-, EB- and EW-types binaries
(Liao+, 2010)
J/AJ/137/226 : Differential light curves of TV Tri (Yang+, 2009)
J/other/IBVS/5761 : Minima and maxima of 389 variables (Hubscher+, 2007)
J/A+A/446/785 : Catalogue of eclipsing variables (Malkov+, 2006)
J/MNRAS/370/2013 : Catalogue of close binaries (Soydugan+, 2006)
J/A+A/418/249 : BV light curves of WX Eridani (Arentoft+, 2004)
J/AcA/54/207 : Ephemerids of eclipsing binaries (Kreiner, 2004)
J/A+A/417/263 : Catalogue of Algol type binary stars (Budding+, 2004)
J/A+AS/144/469 : Delta Scuti stars (Rodriguez+, 2000)
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 d HJD-B The 2003 B band Heliocentric Julian Date
14- 19 F6.3 mag DBmag The 2003 Differential B band magnitude (1)
21- 32 F12.4 d HJD-V ? The 2009 V band Heliocentric Julian Date
34- 39 F6.3 mag DVmag ? The 2009 Differential V band magnitude (1)
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Note (1): The probable errors for individual data are 0.009mag in the
B band and 0.007mag in the V band, respectively.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 21 F8.1 --- Epoch Epoch (integer eclipse cycle number)
23- 25 A3 --- Meth Observational method (p=plate, vi=visual,
pg=photographic, pe=photoelectric,
and CCD=CCD measurement)
27- 28 A2 --- Min Minimum type (I or II)
30- 36 F7.4 d O-C The (O-C) value (1)
38- 44 F7.4 d Res ? Residual in O-C (2)
46 A1 --- f_Res [d] Indicates a discarded residual in O-C
(see Section 3 for details)
48- 49 I2 --- Ref [1/78] Reference; in refs.dat file
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Note (1): Computed using a linear ephemeris from by Kreiner et al.
(2001aocd.book.....K 2001aocd.book.....K). See equation (1) in the paper:
Min. I = HJD 2437531.6834 + 0.82327068*E, where E is the integer
eclipse cycle number.
Note (2): Computed using the nonlinear ephemeris given in equation (2) of
this paper.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref [1/78] Reference number
4- 22 A19 --- BibCode Bibliographic code
24- 43 A20 --- Aut Author's name
45- 78 A34 --- Com Comments
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History:
From electronic version of the journal
References:
Yang & Wei, Paper I, 2009AJ....137..226Y 2009AJ....137..226Y, Cat. J/AJ/137/226
Yang et al., Paper II, 2010AJ....139.1360Y 2010AJ....139.1360Y, Cat. J/AJ/139/1360
Yang et al., Paper III, 2012AJ....143...13Y 2012AJ....143...13Y, Cat. J/AJ/143/13
Yang et al., Paper IV, 2012AJ....144...50Y 2012AJ....144...50Y, Cat. J/AJ/144/50
Yang et al., Paper VI, 2014AJ....147...35Y 2014AJ....147...35Y, Cat. J/AJ/147/35
Zhang et al., Paper VII, 2014AJ....147...66Z 2014AJ....147...66Z, Cat. J/AJ/147/66
Yang et al., Paper VIII, 2014AJ....147..145Y 2014AJ....147..145Y, Cat. J/AJ/147/145
Yang et al., Paper IX, 2016AJ....152...49Y 2016AJ....152...49Y, Cat. J/AJ/152/49
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 09-Dec-2013