The
Pelican Nebula (also known as IC5070 and IC5067)
is an
H II region
associated with the
North America Nebula
in the
constellation
Cygnus. The
gaseous contortions of this
emission nebula
bear a resemblance to a
pelican, giving
rise to its name.The Pelican Nebula is
located nearby first
magnitude star
Deneb, and is
divided from its more prominent neighbour, the North America Nebula, by
a
molecular cloud
filled with dark
dust.
The
Pelican is much studied because it has a particularly active mix of
star formation
and evolving gas clouds. The light from young energetic stars is slowly
transforming cold gas to hot and causing an
ionization front
gradually to advance outward. Particularly dense filaments of cold gas
are seen to still remain, and among these are found two jets emitted
from the
Herbig–Haro object
555. Millions of years from
now this nebula might no longer be known as the Pelican, as the balance
and placement of stars and gas will leave something that appears
completely different.
Der
Pelikan-Nebel IC5070 liegt in der Nähe des Nordamerikanebels (NGC 7000).
Es handelt sich hierbei um einen diffusen Gasnebel im Sternbild Schwan.
IC 5070 erhielt seinen Namen aufgrund seiner Form, welche an einen
Pelikan erinnert. Der Gasnebel ist ca. 1.500 Lichtjahre entfernt und
besteht überwiegend aus Wasserstoff, der teilweise in ionisierter Form (HII)
auftritt und sichtbares Licht in Form von tiefroter Strahlung emittiert.
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