صورة اليوم الفلکیة
Image Credit:
ESO,
K. Iłkiewicz &
S. Scaringi
et al.;
Text:
Cecilia Chirenti
(NASA
GSFC,
UMCP,
CRESST II)
Explanation:
How is RXJ0528+2838 creating such shock waves?
A recently discovered
white dwarf star,
the farther left of the two largest white spots,
RXJ0528+2838,
was found 730
light-years away from
Earth.
Most stars, when
done fusing nuclei in their cores for energy, become
red giant stars, the cores of which
live on as faint dense
white dwarfs that slowly cool down for the rest of time.
White dwarfs are so dense that the
only thing that stops them from collapsing further is
quantum mechanics.
In about 5 billion years,
our Sun will become a
white dwarf, too.
The featured image, obtained with the
European Southern Observatory’s
Very Large Telescope, shows unexplained
bow shocks around RXJ0528+2838, similar to the
bow wave of water around a fast-moving ship.
Astronomers
don’t yet know what is powering
these shocks, which have existed for at least 1,000 years.
The red, green and blue colors represent trace amounts of glowing
hydrogen,
nitrogen and
oxygen gas.