Stellar Orbits in the Central Arcsec
The orbits of stars within
the central 1.0 X 1.0 arcseconds of our Galaxy. In the background,
the central portion of a diffraction-limited image taken in 2010 is
displayed. While every star in this image has been seen to move over the
past 15 years, estimates of orbital parameters are only possible for
the seven stars that have had significant curvature detected.
The annual average positions for these seven stars
are plotted as colored dots, which have increasing color saturation
with time. Also plotted are the best fitting simultaneous orbital
solutions. These orbits provide the best evidence yet for a
supermassive black hole, which has a mass of 4 million times the mass
of the Sun.
References and Credit:
Stellar Orbits paper