NY Virginis primary mid-eclipse times

DOI

We report 18 new primary minima timing observations of the short-period eclipsing binary system NY Virginis. We combined these minima with previously published primary minima to update circumbinary exoplanet models in this system based on O-C timing variations. We performed a nonlinear least-squares minimization search using a quadratic ephemeris and either one or two exoplanets. The only model with an acceptable fit includes a period derivative P=2.83x10^-12^ and two planets in eccentric orbits e=0.15, 0.15 with minimum masses of 2.7 and 5.5 Jovian masses. Analysis of the orbit stability shows that this solution is stable for at least 10^8^ years, but a small increase in eccentricity (e>=0.20) for either planet renders the orbits unstable in less than 10^6^ years. A number of model parameters are significantly degenerate, so additional observations are required to determine planetary parameters with high statistical confidence.

Identifier
DOI http://doi.org/10.26093/cds/vizier.51570184
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AJ/157/184
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/184
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/184
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AJ/157/184
Provenance
Creator Song S.; Mai X.; Mutel R.L.; Pulley D.; Faillace G.; Watkins A.
Publisher CDS
Publication Year 2019
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Physics; Stellar Astronomy