The team used the assumption that the only force acting on Dark Matter is gravity, and calculated that Dark Matter particles must have a mass between 10-3 eV and 107 eV. Thats a much tighter range than the 10-24 eV -- 1019 GeV spectrum which is generally theorised.
Is dark matter heavy?
Physicists previously estimated that dark matter particles had to be lighter than the Planck mass – about 1.2 x 10^19 GeV, at least a 1,000 times heavier than the largest-known particles — yet heavier than 10^minus 24 eV to fit with observations of the smallest galaxies known to contain dark matter, he said.
Is dark matter stronger than gravity?
The analysis underscores how hard it is to explain away dark matter. According to cosmologists prevailing theory, dark matter pervades pretty much every galaxy, providing the extra gravity that keeps stars from swirling out into space, given the speeds at which astronomers see the galaxies rotating.
How strong is dark matter gravity?
The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent).
Can gravity exist without mass?
Without mass, you cant have gravity. The force of gravity that we feel is actually just an acceleration towards the center of the Earth at 9.8 meters per second squared, or 1G. As Einstein showed us, everythings relative.
Does time exist without mass?
You dont require mass because you could, for instance, measure the distance covered by a photon in a certain period of time/time it takes for photon to traverse said distance. Basically you just need some quantity that changes with time and be able to measure it.
Can we create false gravity?
Artificial gravity can be created using a centripetal force. Thus, the gravity force felt by an object is the centrifugal force perceived in the rotating frame of reference as pointing downwards towards the hull.
Is dark matter solid?
Since at least the 1920s, astronomers have hypothesized that the universe contains more matter than seen by the naked eye. Support for dark matter has grown since then, and although no solid direct evidence of dark matter has been detected, there have been strong possibilities in recent years.