Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astronet.ru/db/xware/msg/1164340
Дата изменения: Mon Dec 25 00:00:00 2000
Дата индексирования: Tue Oct 2 18:39:43 2012
Кодировка:
Simulated Supergiant Star
Astronomy Picture of the Day
    


Simulated Supergiant Star
<< Yesterday 22.12.2000 Tomorrow >>
Simulated Supergiant Star
Credit & Copyright: B. Freytag, (Institute for Astronomy and Space Physics, Univ. Uppsala)
Explanation: Looking for that perfect holiday gift for an astronomer? Consider this "star in a box". Of course, the box is actually a computational box consisting of a three dimensional grid of points, and the star is a virtual one whose physical properties and internal dynamics are numerically simulated at the points on the grid. While computers and software capable of a totally realistic numerical simulation of a complete star don't presently exist, researchers have been making progress. This picture is a movie frame from a recent numerical simulation of a supergiant star with properties intended to approximate the real star Betelgeuse. The single frame shows large convection cells and bright spots mottling the virtual supergiant's surface. Simulation movies show these surface features changing substantially with time. Encouragingly, telescopic observations indicate that the surface of Betelgeuse does indeed have prominent large scale features and the well-known star's brightness variations are detectable with the unaided eye. The real supergiant Betelgeuse is some 2,500 degrees cooler than, and 620 times the size of the Sun.

January
February
March
April
May
June
July
August
September
October
November
December
 < December 2000  >
Mo Tu We Th Fr Sa Su




123
45678910
11121314151617
18192021222324
25262728293031
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: simulation - supergiant - convection
Publications with words: simulation - supergiant - convection
See also:
All publications on this topic >>