SIMBAD references

2019ApJ...872..156C - Astrophys. J., 872, 156-156 (2019/February-3)

Asteroseismology of the pre-main-sequence δ Scuti pulsator IP Persei.

CHEN X. and LI Y.

Abstract (from CDS):

A grid of theoretical models are computed to fit the nine oscillation modes of IP Per detected earlier from a multi-site ground-based campaign. Fitting results show that there are two sets of theoretical models that could reproduce the observed frequencies more or less equally as well. In view of other available spectroscopic and photometric measurements, our best-fitting stellar parameters for IP Per are υe=91–3+5 km s–1, Z=0.009–0.001+0.004, M=1.64–0.04+0.10M, Teff=7766–173+348 K, logL/L=1.125–0.046+0.094, logg=4.041–0.003+0.008 dex, R=2.022–0.018+0.042R, τ0=8711–35+68 s, and age = 7.39–0.46+0.76 Myr. Meanwhile, IP Per is found to be a pre-main-sequence star where the CN cycle has not yet reached the equilibrium state. At present, 14% of C12 have been turned into N14. Based on the best-fitting model, f6 is identified as a radial mode, f1 and f2 as two dipole modes, and f3, f4, f5, f7, f8, and f9 as six quadrupole modes.

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

Journal keyword(s): asteroseismology - stars: individual: IP Per - stars: rotation - stars: variables: delta Scuti

Simbad objects: 8

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