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Massive stars: flare activity due to infalls of comet-like bodies

Published online by Cambridge University Press:  23 January 2015

Subhon Ibadov  and
Firuz S. Ibodov
Subhon Ibadov
Affiliation:
Lomonosov Moscow State University, SAI, Moscow, Russia email: [email protected] Institute of Astrophysics, TAS, Dushanbe, Tajikistan
Firuz S. Ibodov
Affiliation:
Lomonosov Moscow State University, SAI, Moscow, Russia email: [email protected]
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Abstract

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Passages of comet-like bodies through the atmosphere/chromosphere of massive stars at velocities more than 600 km/s will be accompanied, due to aerodynamic effects as crushing and flattening, by impulse generation of hot plasma within a relatively very thin layer near the stellar surface/photosphere as well as “blast” shock wave, i.e., impact-generated photospheric stellar/solar flares. Observational manifestations of such high-temperature phenomena will be eruption of the explosive layer's hot plasma, on materials of the star and “exploding” comet nuclei, into the circumstellar environment and variable anomalies in chemical abundances of metal atoms/ions like Fe, Si etc. Interferometric and spectroscopic observations/monitoring of young massive stars with dense protoplanetary discs are of interest for massive stars physics/evolution, including identification of mechanisms for massive stars variability.

Keywords

massive starsimpact-generated stellar flarescomet-like bodies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 108 - 110
Copyright
Copyright © International Astronomical Union 2015 

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