J/ApJ/901/169ivo://CDS.VizieR/J/ApJ/901/169doi:10.26093/cds/vizier.19010169CDSLu H.-P.Zhang L.-Y.Michel R.Han X.L.2022-09-30T21:34:27Z2022-02-21T12:22:32ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomybroad-band-photometryspectroscopymetallicityastronomical-reference-materialsWe present new photometric data and LAMOST spectra for the W UMa binaries UV Lyn, V781 Tau, NSVS 4484038, and 2MASS J15471055+5302107. The orbital and starspot parameters are obtained using the Wilson-Devinney program. Comparing the starspot parameters at different times, there are magnetic activities in these four binaries. The orbital period of UV Lyn is increasing at a rate of dP/dt=+8.9(5)x10^-8^d/yr, which maybe due to mass transfer from the less massive component to the more massive component (dM1/dt=-6.4x10^-8^M_{sun}_/yr). The period variation of 2MASSJ15471055+5302107 is also increasing at a rate of 6.0(4)x10^-7^d/yr, which can be explained by mass transfer from the less massive component to the more massive component (dM1/dt=-2.8x10^-7^M_{sun}_/yr). The period variation of V781 Tau presents the downward parabola superimposed the cyclic oscillation. The period of V781 Tau is decreasing (dP/dt=-3.2(4)x10^-8^d/yr), which can be explained by mass transfer from the more massive component to the less massive component (dM2/dt=-2.2x10^-8^M_{sun}_/yr). The cyclic oscillation may be due to the magnetic activity with a period of 30.8(5)yr rather than a third body. The period variation of NSVS4484038 also shows the cyclic oscillation, which could be explained by the magnetic activity with 10.8(1)yr or a black hole candidate. Interestingly, there is a depth variation between the light minimum times of NSVS 4484038, which may also be caused by stellar magnetic activity.2020ApJ...901..169Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/901/169CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/146 : LAMOST DR1 catalogs (Luo+, 2015)J/AJ/106/2096 : Limb-darkening coefficients in binaries (Van Hamme 1993)J/A+A/336/920 : HD 163151: a new W UMa type system (Rodriguez+ 1998)J/other/IBVS/5438 : 162-nd list of minima of EBs (Diethelm, 2003)J/other/IBVS/5493 : 2003 CCD minima of eclipsing binaries (Nelson+, 2004)J/AJ/128/426 : Subdwarfs in the SDSS (West+, 2004)J/A+A/429/309 : HR 1099 radial velocities (Frasca+, 2005)J/other/IBVS/5592 : Eclipsing binary stars photoelectric minima (Krajci+, 2005)J/MNRAS/372/1117 : SuperWASP exoplanetary transit survey (Christian+, 2006)J/other/IBVS/5731 : Minima and maxima of 816 variables (Hubscher+, 2006)J/A+A/452/959 : BV light curve of V781 Tau (Kallrath+, 2006)J/AJ/131/2986 : Multiplicity of contact binaries (Pribulla+, 2006)J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007)J/other/IBVS/5761 : Minima and maxima of 389 variables (Hubscher+, 2007)J/A+A/467/785 : SuperWASP/ROSAT periodic variable stars (Norton+, 2007)J/AJ/136/1089 : UBVRI light curves of TU Boo (Coughlin+, 2008)J/AJ/138/466 : NSVS variables automated classification (Hoffman+, 2009)J/other/IBVS/5889 : Minima and maxima of 380 variables (Hubscher+, 2009)J/AJ/142/99 : BVRI observations of TZ Boo (Christopoulou+, 2011)J/other/IBVS/5984 : Minima and maxima of 503 variables (Hubscher, 2011)J/other/IBVS/5959 : Minima and maxima of 436 variables (Huebscher+, 2011)J/AJ/141/97 : SDSS DR7 M dwarfs (West+, 2011)J/AJ/146/79 : Differential BVRI light curves of EP And (Liao+, 2013)J/A+A/549/A86 : Period change for 143 SuperWASP EBs (Lohr+, 2013)J/AJ/147/66 : LCs of Algol-type binaries. VII. V404 And (Zhang+, 2014)J/MNRAS/448/2890 : Observation of 6 NSVS eclipsing binaries (Dimitrov+, 2015)J/AJ/149/90 : UBVRI light curves of GSC 3208-1986 (Samec+, 2015)J/MNRAS/455/4136 : Kepler triples (Borkovits+, 2016)J/AJ/152/120 : BV photometry of V532 Mon (He+, 2016)J/AJ/158/186 : 12 totally eclipsing W UMa stars phot. (Kjurkchieva+, 2019)J/AJ/157/111 : Study of 3 early-type contact twin binaries (Yang+, 2019)http://var2.astro.cz/EN/ : Access to O-C gateway databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/901/169https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/901/169http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/901/169https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/901/169https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/901/169http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/901/169GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/901/169/table4 (LAMOST spectral parameters of UV Lyn, NSVS4484038, and 2MASS J15471055+5302107)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/901/169/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/901/169/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/901/169/table4?GETtext/xml+votable180.050000true135.850524738.09849920.0055555555555555566/1397 5110 11345 24378https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/901/169?format=asciiOpticalInfrareddefaultJ/ApJ/901/169/table2Photometric data of UV Lyn, V781 Tau, NSVS4484038 and 2MASS J15471055+5302107NameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD-B? Heliocentric Julian Date of B band observationdtime.epochdoublenullablePhase-B[0.001/1]? Orbital phase of B band observationtime.phasefloatnullableDelBmag[-2.71/0.62]? Different Magnitude in B filtersmagphot.mag;arith.difffloatnullableHJD-V? Heliocentric Julian Date of V band observationdtime.epochdoublenullablePhase-V[0/1]? Orbital phase of V band observationtime.phasefloatnullableDelVmag[-2.8/0.37]? Different Magnitude in V filtersmagphot.mag;arith.difffloatnullableHJD-R[2457007.18/2458875.1] Heliocentric Julian Date of R band observationdtime.epochdoublePhase-R[0/1] Orbital phase of R band observationtime.phasefloatDelRmag[-2.9/0.15] Different Magnitude in R filtersmagphot.mag;arith.difffloatHJD-I? Heliocentric Julian Date of I band observationdtime.epochdoublenullablePhase-I? Orbital phase of I band observationtime.phasefloatnullableDelImag[-2.95/-0.11]? Different Magnitude in I filtersmagphot.mag;arith.difffloatnullableJ/ApJ/901/169/table5Light minimum times fitting parametersNameStar namemeta.id;meta.maincharEpoch[-60845.5/43931.5] Epoch numbermeta.iddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[2415021.9/2458875.1] Heliocentric Julian Datedtime.epochdoublee_HJD[4e-05/0.01]? Uncertainty in HJDdstat.error;time.epochdoublenullableMethObservational methodstat.fitcharTypeEclipse type ("Pri"=335 occurrences or "Sec"=259 occurrences)meta.notecharWeight[1/10] Weightstat.weight;phys.atmol.weightint(O-C)I[-0.044/0.33] Residual of fitstat.fit.residualdouble(O-C)II[-0.11/0.18] Other residual (1)stat.fit.residualdouble(O-C)Sine[-0.05/0.05]? Residual of sine fitstat.fit.residualdoublenullableRefReference(s) (see refs.dat file)meta.ref;pos.framecharJ/ApJ/901/169/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.noteintBibCodeBibcode of the referencemeta.bib.bibcodecharAuthFirst author's name(s)meta.bib.authorcharCommCommentmeta.notecharJ/ApJ/901/169/table4LAMOST spectral parameters of UV Lyn, NSVS4484038, and 2MASS J15471055+5302107NameStar name (1)meta.id;meta.maincharprimarySimbadSimbad column added by the CDSmeta.ref.urlcharn_Name[a] Note on Name (2)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST identifier (JHHMMSS.ss+DDMMSS.s)meta.idcharHJD? Heliocentric Julian Datedtime.epochdoublenullableS/Nr[30.69/395.71]? Signal to noise ratio in r-bandstat.snrfloatnullableSpTSpectral typesrc.spTypecharExp[1200/2700]? Exposure timestime.duration;obs.exposurefloatnullableTeff[5625/6664]? Effective temperatureKphys.temperature.effectiveintnullablee_Teff[17/154]? Teff uncertaintyKstat.error;phys.temperature.effectiveintnullablelogg[3.99/4.25]? Log of surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg[0.03/0.2]? Logg uncertaintylog(cm.s**-2)stat.errorfloatnullable[Fe/H][0.05/0.4]? Log of Fe/H abundancelog(Sun)phys.abund.Fefloatnullablee_[Fe/H][0.01/0.1]? Fe/H uncertaintylog(Sun)stat.error;phys.abund.FefloatnullableEWHa[-1.6/-0.34]? H{alpha} equivalent width in Angstrom units0.1nmspect.line.eqWidthfloatnullablee_EWHa[0.02/2]? EWHa uncertainty0.1nmstat.errorfloatnullableNpNumber of photometric measurements for this star (link to Table 2)meta.numberintnullableNtmNumber of minima measurements for this star (link to Table 5)meta.numberintnullableLCInteractive LC Plotmeta.ref.urlcharVarInteractive (O-C) Plotmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main