Variable stars study with TESS

From sector 1-44 TESS observations, 19 new rapidly oscillating Ap (roAp) stars, 103 ostensibly non-peculiar stars with roAp-like frequencies, and 617 {delta} Scuti stars with independent frequencies typical of roAp stars were found. Examination of all chemically peculiar stars observed by TESS resulted in the discovery of 199 Ap stars that pulsate as {delta} Sct or {gamma} Dor variables. The fraction of pulsating Ap stars is the same as the fraction of pulsating chemically normal stars. There is no distinct separation in frequency or radial order between chemically peculiar {delta} Sct stars and roAp stars. In fact, all the features that originally distinguished roAp from {delta} Sct stars in the past have disappeared. There is no reason to assume that the high frequencies in roAp stars are driven by a different mechanism from the high frequencies in chemically normal stars. However, chemically peculiar stars are far more likely to pulsate with high frequencies. The term 'roAp' should be dropped: all roAp stars are normal {delta} Scuti stars.

Cone search capability for table J/MNRAS/510/5743/table1 (Catalogue of effective temperatures Teff)

Cone search capability for table J/MNRAS/510/5743/table3 (List of 617 new {delta} Sct stars with independent high frequencies exceeding 60 d^-1^)

Cone search capability for table J/MNRAS/510/5743/tablea1 (*List of known roAp or roA stars even those not observed by TESS)

Cone search capability for table J/MNRAS/510/5743/tablea2 (*Chemically peculiar stars known to be {delta} Scuti or {gamma} variables)

Cone search capability for table J/MNRAS/510/5743/tablea3 (List of new roAp and roA stars unreported TESS stars with Teff > 6000 K and with at least one frequency peak higher than 60 d^-1^)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/510/5743
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/510/5743
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/510/5743
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/510/5743
Provenance
Creator Balona L.A.
Publisher CDS
Publication Year 2025
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