J/A+A/690/A231ivo://CDS.VizieR/J/A+A/690/A231doi:10.26093/cds/vizier.36900231CDSWolf M.Zasche P.Kara J.Zejda M.Janik J.Masek M.Lehky M.,Merc J.Richterkova A.Hanzl D.Mikulasek Z.de Villiers S.N.Liska J.2025-02-24T20:01:56Z2024-10-10T08:47:25ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsradial-velocityvisible-astronomyThe study of apsidal motion in eccentric eclipsing binaries provides an important observational test of theoretical models of stellar structure and evolution. New ground-based and space-based photometric data have been obtained and archival spectroscopic measurements were used in this study of three detached early-type and southern-hemisphere eccentric eclipsing binaries GM Nor (P=1.88d, e=0.05), V397 Pup (3.00d, 0.30), and PT Vel (1.80d, 0.12). Their TESS observations in several sectors have also been included and the corresponding light curves were solved using the PHOEBE code. As a result, new accurate photoelectric times of minimum light have been obtained. The newly completed O-C diagrams were analyzed using all reliable timings found in the literature and calculated using the TESS light curves. New or improved values for the elements of apsidal motion were obtained. Using ESO archive spectroscopy, for V397 Pup, the precise absolute parameters were newly derived: M1=3.076(35)M_{sun}_, M2=2.306(35)M_{sun}_, and R1=2.711(55)R_{sun}_, R2=1.680(55)R_{sun}_. For PT Vel the absolute dimensions were improved: M1=2.204(25)M_{sun}_, M2=1.638(25)M_{sun}_, and R1=2.108(30)R_{sun}_, R2=1.605(30)R_{sun}_. For GM Nor, the less accurate absolute parameters based on the light curve analysis were evaluated: M1=1.94(15)M_{sun}_, M2=1.84(14)M_{sun}_, and R1=2.27(20)R_{sun}_, R2=2.25(20)R_{sun}_. We found more precise and relatively short periods of apsidal motion of about 80, 335, and 160 years, along with the corresponding internal structure constants, log k2, -2.524, -2.361, and -2.563, for GM Nor, V397 Pup, and PT Vel, respectively. Relativistic effects are small but not negligible, making up to 10% of the total apsidal motion rate in all systems. No marks of the presence of the third body were revealed in the light curves, on the O-C diagrams, or in the reduced spectra of the eccentric systems studied here.2024A&A...690A.231Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A231CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/690/A231https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/690/A231http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/690/A231https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/690/A231https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/690/A231http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/690/A231GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/690/A231/stars (Studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A231/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A231/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A231/stars?GETtext/xml+votable180.050000true237.9915-55.36338890.0055555555555555566/38562 39701 41812https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/690/A231?format=asciiOpticaldefaultJ/A+A/690/A231/starsStudied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharRAJ2000Simbad Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainNminNumber of measurements for time of minimummeta.numberintVCShow the Radial Velocity curvesmeta.ref.urlcharNRV? Number of measurements for radial velocitiesmeta.numberintnullableJ/A+A/690/A231/minimaNew times of minimum light of GM Nor, V397 Pup and PT Vel (tables A1-A5)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (BJD-2400000)dtime.epochdoublen_BJD[*] * for mean value of UBV or VRI measurementsmeta.notechare_BJDBJD errordstat.errordoubleEpochEpochtime.epochfloatSourceSource/Observatorymeta.id;instrcharStarStar Namemeta.id;meta.maincharJ/A+A/690/A231/rvRadial velocities of V397 Pup and PT Vel derived from archival HARPS and FEROS spectra (table B1-B2)RV2Radial velocity of secondarykm/sspect.dopplerVelocfloate_RV2Radial velocity of secondary errorkm/sstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharInstInstrument (HARPS or FEROS)meta.id;instrcharDateObservation datetime.epoch;obsnullableHJDHeliocentric Julian date (HJD-2400000dtime.epochdoubleRV1Radial velocity of primarykm/sspect.dopplerVelocfloate_RV1Radial velocity of primary errorkm/sstat.errorfloat