J/AJ/160/62 2018-2019 Xinglong BVR photometry of V0599 Aur (Hu+, 2020)
Long-term photometry and orbital period change of the W UMa-type binary
V0599 Aur: evidence of about 11 yr magnetic-activity cycle.
Hu Ke, Yu Y.-X., Zhang J.-F., Xiang F.-Y.
<Astron. J., 160, 62 (2020)>
=2020AJ....160...62H 2020AJ....160...62H
ADC_Keywords: Stars, double and multiple; Photometry, UBVRI
Keywords: Eclipsing binary stars ; Close binary stars ;
W Ursae Majoris variable stars ; Starspots ; Stellar evolution ;
CCD photometry ; Stellar activity
Abstract:
Combining all available photometric data from various surveys and
literature with our observations, we present 10 sets of light curves
for the eclipsing binary V0599 Aur covering a timescale of 20 yr.
During the last two decades, the O'Connell effect continuously varied
and went through at least two flips between positive and negative
effects. The photometric solutions from our two sets of multicolored
light curves show that V0599 Aur is a W-type shallow contact binary
with an active spot on the secondary. Its absolute parameters are
determined by combining the Gaia distance with the photometric
solutions. The period investigation reveals a secular decrease and a
cyclic variation in its orbital period. The former mainly originates
from the mass transfer from the more massive secondary to the less
massive primary. The latter can be preferentially explained as a
result of cyclic magnetic activity of the secondary, with three
observational supports:
(1) the existence and evolution of an active spot suggested by the
long-term photometry,
(2) periodic variation in both the O'Connell effect and relative
luminosity, and
(3) weak correlations between O'Connell effect/relative luminosity
changes and cyclic period variation.
Together with the cyclic period variation and its theoretical
reasonability by Applegate's mechanism, we suggest that the secondary
of V0599 Aur is a solar-type magnetic-activity star with an
approximately 11 yr active cycle. Furthermore, by combining the
secular period decrease with the Roche-lobe model, we infer that V0599
Aur is evolving from the marginal contact state controlled by thermal
relaxation oscillation theory to the overcontact state.
Description:
Using the 85cm reflecting telescope at the Xinglong Station of the
National Astronomical Observatory of China, we made two multiband
photometric observations of the eclipsing binary V0599 Aur on 2018
November 22 and 2019 December 19. For our observations,
Johnson-Cousins BVR filters were adopted.
Objects:
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RA (2000) DE Designation(s) (Period)
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05 08 46.80 +32 02 08.5 V0599Aur = V* V599 Aur (P=0.3153591)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 80 82 BVR bands photometric data of V0599 Aur obtained
in 2018
table3.dat 80 131 BVR Bands photometric data of V0599 Aur obtained
in 2019
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/AJ/106/2096 : Limb-darkening coefficients in binaries (Van Hamme 1993)
J/A+A/417/745 : V(RI)C differential photometry of V861 Her (Csizmadia+,2004)
J/AJ/130/767 : RV studies of close binary stars (Rucinski+, 2005)
J/AJ/132/769 : Radial velocities of 10 close binaries (Pribulla+, 2006)
J/PASJ/59/955 : UBVRI differential photometry of BH Vir (Xiang+, 2007)
J/AJ/136/586 : Radial velocities of 10 close binaries (Rucinski+, 2008)
J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)
J/AJ/147/50 : Differential BVRI light curves of DV Psc (Pi+, 2014)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/MNRAS/442/2620 : VRI light curve of 5 eclipsing binaries (Zhang+, 2014)
J/MNRAS/448/946 : Kepler eclipse timing variation analyses (Borkovits+, 2015)
J/MNRAS/448/2890 : Observation of six NSVS eclipsing binaries (Dimitrov+, 2015)
J/A+A/602/A117 : Periods of 2290 CoRoT binaries (Klagyivik+, 2017)
J/AJ/158/104 : LL Com BVR bands photo. & times of light minimum (Hu+, 2019)
J/AJ/158/186 : Photo. of 12 total eclipsing W UMa stars (Kjurkchieva+,2019)
Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJDB ? Heliocentric Julian Date of B band observation
14- 19 F6.3 --- Phase-B ? Corresponding Phase for HJD of B band
21- 26 F6.3 mag Bmag ? Differential B band magnitude
28- 39 F12.4 d HJDV ? Heliocentric Julian Date of V band observation
41- 46 F6.3 --- Phase-V ? Corresponding Phase for HJD of V band
48- 53 F6.3 mag Vmag ? Differential V band magnitude
55- 66 F12.4 d HJDR ? Heliocentric Julian Date of R band observation
68- 73 F6.3 --- Phase-R ? Corresponding Phase for HJD of R band
75- 80 F6.3 mag Rmag ? Differential R band magnitude
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie FIX [CDS], 19-Oct-2020