SIMBAD references

2015ApJ...806L..33A - Astrophys. J., 806, L33 (2015/June-3)

Observational signatures of convectively driven waves in massive stars.


Abstract (from CDS):

We demonstrate observational evidence for the occurrence of convectively driven internal gravity waves (IGWs) in young massive O-type stars observed with high-precision CoRoT space photometry. This evidence results from a comparison between velocity spectra based on two-dimensional hydrodynamical simulations of IGWs in a differentially rotating massive star and the observed spectra. We also show that the velocity spectra caused by IGWs may lead to detectable line-profile variability and explain the occurrence of macroturbulence in the observed line profiles of OB stars. Our findings provide predictions that can readily be tested by including a sample of bright, slowly and rapidly rotating OB-type stars in the scientific program of the K2 mission accompanied by high-precision spectroscopy and their confrontation with multi-dimensional hydrodynamic simulations of IGWs for various masses and ages.

Abstract Copyright:

Journal keyword(s): asteroseismology - line: profiles - stars: massive - stars: oscillations - techniques: photometric - waves

Simbad objects: 5

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