J/AJ/147/35ivo://CDS.VizieR/J/AJ/147/35doi:10.26093/cds/vizier.51470035CDSYang Y.-G.Wei J.-Y.Li H.-L.2026-03-18T12:03:12Z2014-09-04T14:34:17ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomyphotometryNew photometry of the neglected eclipsing binary FR Orionis was obtained in 2012 November and December. Using the updated Wilson-Devinney program, the photometric elements were deduced from two-color light curves. The results indicate that this system is a semi-detached binary, with a mass ratio of 0.325(+/-0.002) and a fill-out factor of the primary of f_p_=73.5(+/-0.2)%. The oscillating light curves imply that FR Ori may be an oscillating EA (oEA)-type star with a rapidly pulsating, mass-accreting primary component. After we removed the theoretical light curves from the observations, Fourier analysis revealed that the more massive component possibly shows a {delta} Scuti type pulsation with four detected frequencies. The dominant frequency is f_1_=38.6c/day (i.e., P_puls_=37.3minutes), and the pulsation constant is Q=0.014days. Based on all available eclipsing times, the orbital period is undergoing a secular period increase with a rate of dP/dt=+8.85(+/-0.66)x10^-8^day/yr, which may be interpreted by mass transfer from the secondary to the primary. We expect that the more massive component will fill its Roche lobe due to mass transfer of the secondary. Therefore, the oEA star FR Ori may evolve into a contact configuration.2014AJ....147...35Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/147/35CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2012)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 : Catalog of eclipsing variables. Ver. 2 (Avvakumova+, 2013)J/AJ/137/226 : Differential light curves of TV Tri (Yang+, 2009)J/AJ/139/1360 : AO Ser VR light curves (Yang+, 2010)J/AJ/143/13 : Light curves of AL Gem and BM Mon (Yang+, 2012)J/AJ/144/50 : Light curves of AV Hya and DZ Cas (Yang+, 2012)J/AJ/144/136 : BV light curves of V1241 Tauri (Yang+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/147/35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/147/35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/147/35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/147/35https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/147/35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/147/35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/147/35/table2VR photometric observations for the eclipsing binary FR OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD-V? Heliocentric Julian Date of V band observationdtime.epochdoublenullableDVmag? Differential Johnson V band magnitudemagphot.mag;arith.difffloatnullableHJD-RHeliocentric Julian Date of R band observationdtime.epochdoubleDRmagDifferential Cousins R band magnitudemagphot.mag;arith.difffloatJ/AJ/147/35/table4All compiled eclipsing times for the eclipsing binary FR OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleEpochObserved epoch numbermeta.number;time.epochdoubleMethObservational method (1)stat.fitcharMinMinimum type (I or II)meta.codecharO-C1Residual of (O-C)_1_ (2)dstat.fit.residualfloatO-CComputed (O-C) residualdstat.fit.residual;stat.fit.omcdoubleO-C2? The final residuals of (O-C)_2_dstat.fit.residualfloatnullablef_O-C2[d] Indicates a discarded residual in O-C2meta.codecharRefReference; in refs.dat filemeta.ref;pos.frameintJ/AJ/147/35/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference identifierpos.frame;meta.mainintprimaryBibCodeBibliographic codemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar