J/PASP/134/K4202 KN Per BVRcIc light curves (Gao+, 2022)
Photometric and Spectroscopic Studies of the Long-Period Low-Mass-Ratio
Deep-Contact Binary KN Per.
Gao X.-Y., Li K., Cai Y.-W., Guo Y.-N., Gao X., Wang X., Yin S.-P., Liu F.,
Sun G.-Y.
<Publ. Astron. Soc. Pac., 134, k4202 (2022)>
=2022PASP..134k4202G 2022PASP..134k4202G (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: binary stars - contact binary stars - eclipsing binary stars -
magnetic stars
Abstract:
Photometric analysis and spectroscopic study of the long-period
low-mass-ratio deep-contact binary KN Per were performed. The light
curves of the BV(RI)c band were from the Ningbo Bureau of Education
and Xinjiang Observatory Telescope at the Xingming Observatory.
Through the analysis of the Wilson-Devinney program, KN Per was found
as an A-type low-mass-ratio deep-contact binary (q=0.236; f=53.4%). A
cool spot applied on the primary component was introduced to explain
the unequal maxima of the light curve. Based on the O-C analysis, we
found that the rate of the increasing orbital period is
dP/dt=5.12±(0.30)x10-7day/yr, meaning the mass transfer from the
secondary component to the primary one. By analyzing the spectroscopic
data, we detected chromospheric activity emission line indicators,
which correspond to the light-curve analysis. Seventy-one long-period
(P>0.5 day) contact binaries, including our target, were collected.
The evolutionary states of all collected stars were investigated by
the illustrations of mass-radius, mass-luminosity, and log
MT-logJo. The relations of some physical parameters were also
determined. With the instability parameters of KN Per, we determined
that it is a stable contact binary system at present.
Description:
The photometric observations of KN Per are from Ningbo Bureau of
Education and Xinjiang Observatory Telescope (NEXT) at Xingming
Observatory and other available light-curve databases, Transiting
Exoplanet Survey Satellite (TESS), All-Sky Automated Survey for
Supernovae (ASAS-SN), and Wide Angle Search for Planets (SuperWASP).
Objects:
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RA (2000) DE Designation(s)
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03 22 35.64 +41 19 55.1 KN Per = HIP 15726
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 72 627 Photometric data of KN Per obtained on
2019 November 14, 16, 17, 19, and 20
table6.dat 51 121 Minimum timings of KN Per
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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- 11 F11.5 d HJDB B-band HJD (HJD-2400000)
13- 18 F6.3 mag DBmag Differential B magnitude
20- 30 F11.5 d HJDV ? V-band HJD (HJD-2400000)
32- 36 F5.3 mag DVmag ? Differential V magnitude
38- 48 F11.5 d HJDRc ? Rc-band HJD (HJD-2400000)
50- 54 F5.3 mag DRcmag ? Differential Rc magnitude
56- 66 F11.5 d HJDIc ? Ic-band HJD (HJD-2400000)
68- 72 F5.3 mag DIcmag ? Differential Ic magnitude
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d BJD BJD (BJD-2400000)
13- 19 F7.5 d e_BJD ?=- Error on BJD
22- 28 F7.1 --- E Epoch
32- 39 F8.5 --- O-C Observed minus computed
41- 48 F8.5 --- Res Residual
50- 51 I2 --- Ref Reference (1)
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Note (1): References as follows:
1 = Goderya et al. (1993A&A...278..463G 1993A&A...278..463G)
2 = http://var.astro.cz/ocgate/
3 = Hubscher (2005IBVS.5643....1H 2005IBVS.5643....1H)
4 = Dvorak (2006IBVS.5677....1D 2006IBVS.5677....1D)
5 = Hubscher et al. (2006IBVS.5731....1H 2006IBVS.5731....1H, Cat. J/other/IBVS/5731)
6 = Hubscher & Walter (2007IBVS.5761....1H 2007IBVS.5761....1H)
7 = SuperWASP
8 = Hubscher et al. (2009IBVS.5874....1H 2009IBVS.5874....1H, Cat. J/other/IBVS/5874)
9 = Hubscher et al. (2008IBVS.5830....1H 2008IBVS.5830....1H, cat. J/other/IBVS/5830)
10 = VSB
11 = Hubscher et al. (2009IBVS.5889....1H 2009IBVS.5889....1H, Cat. J/other/IBVS/5889)
12 = Hubscher et al. (2010IBVS.5918....1H 2010IBVS.5918....1H, Cat. J/other/IBVS/5918)
13 = Brat et al. (2009OEJV..107....1B 2009OEJV..107....1B)
14 = Diethelm (2009IBVS.5871....1D 2009IBVS.5871....1D)
15 = Hubscher et al. (2010IBVS.5941....1H 2010IBVS.5941....1H Cat. J/other/IBVS/5941)
16 = Diethelm (2011IBVS.5960....1D 2011IBVS.5960....1D)
17 = Hubscher & Lehmann (2012IBVS.6026....1H 2012IBVS.6026....1H)
18 = Honkova et al. (2013OEJV..160....1O 2013OEJV..160....1O)
19 = AAVSO
20 = Hubscher (2013IBVS.6084....1H 2013IBVS.6084....1H)
21 = Diethelm (2012IBVS.6011....1D 2012IBVS.6011....1D)
22 = Diethelm (2013IBVS.6042....1D 2013IBVS.6042....1D)
23 = Corfini et al. (2014IBVS.6094....1C 2014IBVS.6094....1C)
24 = Honkova et al. (2014OEJV..164....1O 2014OEJV..164....1O))
25 = Hubscher (2014IBVS.6118....1H 2014IBVS.6118....1H)
26 = Hubscher (2015IBVS.6152....1H 2015IBVS.6152....1H)
27 = BRNO
28 = BAVJ
29 = TESS
30 = our data
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Feb-2023