000005600 001__ 5600
000005600 005__ 20230127130513.0
000005600 0247_ $$2DOI$$a10.1093/mnras/stab1578
000005600 037__ $$aSCART-2022-0019
000005600 100__ $$aHoldsworth, D.~L.
000005600 245__ $$aTESS cycle 1 observations of roAp stars with 2-min cadence data
000005600 260__ $$c2022
000005600 500__ $$aarXiv:2105.13274
000005600 520__ $$aWe present the results of a systematic search for new rapidly oscillating Ap (roAp) stars using the 2-min cadence data collected by the Transiting Exoplanet Survey Satellite (TESS) during its Cycle 1 observations. We identify 12 new roAp stars. Amongst these stars we discover the roAp star with the longest pulsation period, another with the shortest rotation period, and six with multiperiodic variability. In addition to these new roAp stars, we present an analysis of 44 known roAp stars observed by TESS during Cycle 1, providing the first high-precision and homogeneous sample of a significant fraction of the known roAp stars. The TESS observations have shown that almost 60 per cent (33) of our sample of stars are multiperiodic, providing excellent cases to test models of roAp pulsations, and from which the most rewarding asteroseismic results can be gleaned. We report four cases of the occurrence of rotationally split frequency multiplets that imply different mode geometries for the same degree modes in the same star. This provides a conundrum in applying the oblique pulsator model to the roAp stars. Finally, we report the discovery of non-linear mode interactions in α Cir (TIC 402546736, HD 128898) around the harmonic of the principal mode - this is only the second case of such a phenomenon.
000005600 594__ $$aNO
000005600 6531_ $$aasteroseismology
000005600 6531_ $$atechniques: photometric
000005600 6531_ $$astars: chemically peculiar
000005600 6531_ $$astars: magnetic field
000005600 6531_ $$astars: oscillations
000005600 6531_ $$astars: variables
000005600 6531_ $$aAstrophysics - Solar and Stellar Astrophysics
000005600 700__ $$aCunha, M.~S.
000005600 700__ $$aKurtz, D.~W.
000005600 700__ $$aAntoci, V. 
000005600 700__ $$aHey, D.~R.
000005600 700__ $$a... Lampens, P. et al.
000005600 773__ $$c1073-1110$$n1$$pMonthly Notices of the Royal Astronomical Society$$v506$$y2021
000005600 8560_ $$fpatricia.lampens@observatoire.be
000005600 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2021MNRAS.506.1073H
000005600 905__ $$apublished in
000005600 980__ $$aREFERD