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Астронет: Астрономическая картинка дня LkHa101: Дырка в пончике http://variable-stars.ru/db/msg/1166448/eng |
Credit & Copyright: Peter
Tuthill
(Sydney
University Physics Department) et al.,
W.M. Keck Observatory
Explanation:
You'd need a really big cup of
coffee with this doughnut ...
because the hole in the middle is about a billion kilometers
across.
Centered on the Sun, a circle that size would lie
between the orbits of Mars and Jupiter.
In fact, this doughnut is known to surround a massive newborn star
cataloged as LkHa 101
which lies in the
constellation Perseus.
Imaged
in infrared light, the tantalizing torus-shaped cloud of gas
and dust
is slightly tilted to our view.
The cloud's material may well be the ingredients
for the formation of a
distant
solar system.
A bright source of
ultraviolet light,
the hot young star itself is much fainter in the
infrared and so not visible in this picture.
Still, the star's presence is indicated as its intense stellar wind and
radiation has apparently carved out the doughnut's hole.
This premier close-up of a stellar system in formation was accomplished
by adapting a powerful observational technique
called
interferometry to planet Earth's largest single mirror
telescope, the 10 meter Keck.
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.