Non-LTE Modelling of the Structure and Spectra of the Hot Accretion Spots on the Surface of Young Stars

Abstract

The paper describes the modelling of the structure and spectra of the hot accretion spots on the surface of young stars with taking into account departures from LTE for hydrogen and helium. It has been found that the existence of the ram pressure of the in-falling gas at the outer boundary of the hot spot leads to the Stark broadening of the hydrogen line profiles up to FWHM of about 1000 km/s at the considered accretion parameters. It is shown that taking into account departures from LTE for atoms and ions of carbon and oxygen does not lead to noticeable changes in the structure of the hot spot.

arXiv commentaccepted for publication in Astronomy Letters

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Cited by in corpus (5)

• Spots, flares, accretion, and obscuration in the pre-main sequence binary DQ Tau
• The structure and spectrum of the accretion shock in the atmospheres of young stars
• Searching for solar-like oscillations in pre-main sequence stars using APOLLO
• Wind Dynamics and Circumstellar Extinction Variations in the T Tauri Star RY Tau
• Magnetospheric accretion at the late phases of the Pre-Main-Sequence evolution. The case of RZ Psc