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Астронет: Астрономическая картинка дня Галактика в скоплении создала четыре изображения далёкой Сверхновой http://www.variable-stars.ru/db/msg/1333452/eng |
Credit & Copyright: NASA,
ESA, and
S. Rodney
(JHU) and the FrontierSN team;
T. Treu
(UCLA),
P. Kelly (UC Berkeley), and the GLASS team;
J. Lotz (STScI) and the
Frontier Fields team;
M. Postman
(STScI) and the
CLASH team; and
Z. Levay
(STScI)
Explanation:
What are the unusual spots surrounding that galaxy?
They are all images of the same supernova.
For the first time, a single supernova explosion has been
seen split into
multiple images by the
gravitational lens deflections of intervening masses.
In this case the masses are a large galaxy and its home
galaxy cluster.
The featured image was captured last November by the Earth-orbiting
Hubble Space Telescope.
The yellow-hued
quadruply-imaged Supernova
Refsdal
occurred in the early universe far behind the cluster.
Measuring the locations and time-delays between the
supernova images
should allow astrophysicists to
recover
the amount of
dark matter
in the galaxy and cluster.
With patience and
luck, a fifth image of the
supernova
will also be recovered
nearby in the next few years.
Astrophysicists:
Browse 1,000+ codes in the Astrophysics Source Code Library
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.