ABSTRACT Detecting and understanding rotation in stellar interiors is nowadays one of the unsolved problems physics. Asteroseismology has been able to provide insights on for Sun, solar-like stars, compact objects like white dwarfs. However, this still very difficult intermediate-mass stars. These stars are moderate-to-rapid rotators. Rotation splits shifts oscillation modes, which makes spectr...

We perform mode identification for five $\delta$ Scuti stars in the Pleiades star cluster, using custom light curves from K2 photometry. By creating \'echelle diagrams, we identify radial and dipole ridges, comprising a total of 28 16 modes across stars. also suggest possible identities those that lie offset ridges. calculate non-rotating stellar pulsation models to verify our identifications, ...

Abstract Stellar structure and evolution theory is one of the bases in modern astronomy. inner structures their evolutionary states can be precisely tested by asteroseismology, since information brought to stellar surface global oscillating waves becomes observable. For speed (i.e., how long timescale does a star stay at special phase?), because insurmountable gap between timescales history hum...

We studied 89 A- and F-type members of the Pleiades open cluster, including five escaped members. measured projected rotational velocities (v sin i) for 49 stars confirmed that stellar rotation causes a broadening main sequence in color-magnitude diagram. Using time-series photometry from NASA's TESS Mission (plus one star observed by Kepler/K2), we detected delta Scuti pulsations 36 stars. The...

On the basis of almost 1500 uvby photometric observations of θ Tucanae collected in 1993, we discuss the colour variation of this multi-periodic δ Scuti star and debate some of its binary and pulsational properties. The frequencies f1 = 0.281 and f2 = 0.142 cd−1 embody orbital motion in a 7. d04 day ellipsoidal configuration characterised by a light curve with unequal maxima and minima and a co...

We present new precise photoelectric observations of the Pre–Main-Sequence δ Scuti star, V351 Ori. These new data show that V351 Ori pulsates in a mixture of several radial modes (at least four). The comparison between observations and detailed pulsational models, allows us to provide independent constraints on the mass and luminosity of the star. The predicted distance is 210 pc, indicating th...