Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...313..857g&link_type=abstract
Astronomy and Astrophysics, v.313, p.857-865
Astronomy and Astrophysics
Astrophysics
28
Ux Ori Type Stars, Star-Grazing Bodies, Evaporation, Stellar Wind
Scientific paper
This paper studies the behaviour of star-grazing planetesimal bodies in the neighbourhood of UX Ori-type stars. When approaching a star, large size bodies (diameteres of ten meters or more) disintegrate into a number of small fragments under the effect of thermal stresses. In turn, the fragments sublimate within a sphere of about ten stellar radii and form a circumstellar gas envelope. An important feature of this envelope is a strong excess of heavy elements. Our calculations show that the radiative force on the metal-enriched gas is much larger than in the case of standard chemical composition and exceeds by few times the gravity of the star. As a result, the evaporated matter is accelerated outward and is expelled from the system by radiative pressure. Thus, the evaporation of planetesimals in the vicinity of young stars leads to complex gas motions which include infall, quasi-keplerian rotation and the radial outflow typical of radiatively driven stellar winds.
Grinin Vladimir
Natta Antonella
Tambovtseva Larisa
No associations
LandOfFree
Evaporation of star-grazing bodies in the vicinity of UX Ori-type stars. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evaporation of star-grazing bodies in the vicinity of UX Ori-type stars., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evaporation of star-grazing bodies in the vicinity of UX Ori-type stars. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1455912