SIMBAD references

2019ApJ...887..253C - Astrophys. J., 887, 253-253 (2019/December-3)

Exploring the convective core of the hybrid δ Scuti-γ Doradus star CoRoT 100866999 with asteroseismology.

CHEN X., LI Y. and ZHANG X.

Abstract (from CDS):

We computed a grid of theoretical models to fit the δ Scuti frequencies of CoRoT 100866999 detected earlier from the CoRoT time serials. The pulsating primary star is determined to be a main-sequence star with a rotation period of 4.1–0.5+0.6 days, rotating slower than the orbital motion. The fundamental parameters of the primary star are determined to be M=1.71–0.04+0.13M☉, Z=0.012–0.000+0.004, fov=0.02–0.02+0.00, Teff=8024–297+249 K, L=11.898–1.847+2.156L☉, logg=4.166–0.002+0.013, R=1.787–0.016+0.040R☉, and Xc=0.488–0.020+0.011, matching those obtained from the eclipsing light-curve analysis. Based on the model fittings, p1 and p5 are suggested to be two dipole modes, and p3, p4, p6, and p7 are suggested to be four quadrupole modes. In particular, p4 and p7 are identified as two components of one quintuplet. Based on the best-fitting model, we find that p1 is a g mode and the other nonradial modes have pronounced mixed characters, which give strong constraints on the convective core. Finally, the relative size of the convective core of CoRoT 100866999 is determined to Rconv/R=0.0931–0.0013+0.0003.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Asteroseismology - Delta Scuti variable stars - Pulsating variable stars - Gamma Doradus variable stars

Simbad objects: 5

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