Instead, Minchin
believes the arm of NGC 4254 stars was created by the very seriousness of
VIRGOHI21. He
reached this conclusion after studying the object with the Westerbork Synthesis
Radio Telescope-(WSRT) in the Netherlands ,
which detects the emission of hydrogen atoms. Observe an animation showing VIRGOHI21 and two galactic
neighbors from a variety of perspectives .
The new WSRT measurements with relatively high resolution, suggest that VIRGOHI21 is effectively a single object, discarding the previous suggestions that the rotation was an illusion caused by two clouds of gas interns.
The new WSRT measurements with relatively high resolution, suggest that VIRGOHI21 is effectively a single object, discarding the previous suggestions that the rotation was an illusion caused by two clouds of gas interns.
But confirming a
mystery raised by previous studies. Normal matter the object weighs a few hundred million
times the mass of the Sun-But its dark matter inferred by studying the speed of
rotation of the cloud-appears to weigh at least 100 times as much.
This proportion is
higher than expected, in all other galaxies, dark matter than normal matter by
a factor of only 10. "Even if this is a dark galaxy, is not what you
expected to find. The baryon number is too low," says Michael Merrifield
of the University of Nottingham UK , who
was not in the team Minchin.
Minchin recognizes
that it is an enigma. Several scans in Arecibo
and other radio observatories aim to find more examples of dark galaxies that
might shed light on how much dark matter they contain. Until now, however, scans are
finding little to compare the characteristics of VIRGOHI21.
No comments:
Post a Comment