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Астронет: Астрономическая картинка дня В рукавах NGC 1097 http://variable-stars.ru/db/msg/1857159/eng |
Credit & Copyright: Mike Selby,
Mark Hanson
Explanation:
Spiral galaxy NGC
1097
shines in southern skies, about
45 million light-years away in the heated constellation
Fornax.
Its blue spiral arms are mottled with pinkish star forming regions in
this colorful galaxy
portrait.
They seem to have wrapped around a small companion galaxy above and
right of center, about 40,000 light-years from the spiral's luminous core.
That's not NGC 1097's only peculiar feature, though.
This very deep exposure hints of faint,
mysterious jets, seen to extend well beyond the bluish arms.
In fact, four faint jets are ultimately
recognized
in optical images of NGC 1097.
The jets
trace an X centered on the galaxy's nucleus, but probably don't
originate there.
Instead, they could be fossil star streams,
trails left over from the
capture and disruption of a much smaller galaxy in the
large spiral's ancient past.
A Seyfert
galaxy, NGC 1097's nucleus also harbors a
supermassive black hole.
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.