Evryscope-South survey

Using photometric data collected by Evryscope-South, we search for nearby young variable systems on the upper main sequence (UMS) and pre-main sequence (PMS). The Evryscopes are all-sky high-cadence telescope arrays operating in the Northern and Southern hemispheres. We base our search on a Gaia-selected catalog of young neighborhood upper- and pre-main sequence stars which were chosen through both astrometric and photometric criteria. We analyze 44971 Evryscope-South light curves in search of variability. We recover 615 variables, with 378 previously known, and 237 new discoveries including 84 young eclipsing binaries (EB) candidates. We discover a new highly eccentric binary system and recover a further four previously known systems, with periods ranging from 299 to 674hr. We find 158 long-period (>50hr) candidate EB systems, 9 from the PMS and 149 from the UMS, which will allow constraints on the mass/radius/age relation. These long-period EBs include a 179.3hr PMS system and a 867.8hr system from the UMS. For PMS variable candidates we estimate system ages, which range from 1 to 23Myr for non-EBs and from 2 to 17Myr for EBs. Other non-EB discoveries that show intrinsic variability will allow relationships between stellar rotation rates, ages, activity, and mass to be characterized.

Cone search capability for table J/PASP/132/K4202/tablea1 (UMS variable system recoveries from this survey)

Cone search capability for table J/PASP/132/K4202/tablea2 (PMS variable system recoveries from this survey)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/PASP/132/K4202
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/132/K4202
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/132/K4202
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/PASP/132/K4202
Provenance
Creator Galliher N.W.; Ratzloff J.K.; Corbett H.; Law N.M.; Howard W.S.,Glazier A.L.; Vasquez Soto A.; Gonzalez R.
Publisher CDS
Publication Year 2021
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; Observational Astronomy; Physics; Stellar Astronomy