NASA | Fermi Provides New Insights on Dark Matter
There’s more to the cosmos than meets the eye. About 80 percent of the matter in the universe is invisible to telescopes, yet its gravitational influence is manifest in the orbital speeds of stars around galaxies and in the motions of clusters of galaxies. Yet, despite decades of effort, no one knows what this “dark matter” really is. Many scientists think it’s likely that the mystery will be solved with the discovery of new kinds of subatomic particles, types necessarily different from those composing atoms of the ordinary matter all around us. The search to detect and identify these particles is underway in experiments both around the globe and above it.
Scientists working with data from NASA’s Fermi Gamma-ray Space Telescope have looked for signals from some of these hypothetical particles by zeroing in on 10 small, faint galaxies that orbit our own. Although no signals have been detected, a novel analysis technique applied to two years of data from the observatory’s Large Area Telescope (LAT) has essentially eliminated these particle candidates for the first time.
WIMPs, or Weakly Interacting Massive Particles, represent a favored class of dark matter candidates. Some WIMPs may mutually annihilate when pairs of them interact, a process expected to produce gamma rays — the most energetic form of light — that the LAT is designed to detect.
The team examined two years of LAT-detected gamma rays with energies in the range from 200 million to 100 billion electron volts (GeV) from 10 of the roughly two dozen dwarf galaxies known to orbit the Milky Way. Instead of analyzing the results for each galaxy separately, the scientists developed a statistical technique — they call it a “joint likelihood analysis” — that evaluates all of the galaxies at once without merging the data together. No gamma-ray signal consistent with the annihilations expected from four different types of commonly considered WIMP particles was found.
For the first time, the results show that WIMP candidates within a specific range of masses and interaction rates cannot be dark matter. A paper detailing these results appeared in the Dec. 9, 2011, issue of Physical Review Letters.
Learn more at: http://www.nasa.gov/mission_pages/GLAST/news/dark-matter-insights.html
This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/vis/a010000/a010900/a010943/index.html
Like our videos? Subscribe to NASA’s Goddard Shorts HD podcast:
http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html
Or find NASA Goddard Space Flight Center on Facebook:
http://www.facebook.com/NASA.GSFC
Or find us on Twitter:
http://twitter.com/NASAGoddard
1:47 Batman.
That dark matter must be mental, according to platonic physics
We know these facts and observations:
1) Dark matter does not interact with most of the elementary particles, only through the mysterious gravity boson, which so far differs from the other bosons in that it has no corresponding physical particle.
2) At the same time, we have deduced so far that gravity is unlike any other boson because it does not have a physical correspondent, making it, by default, mental. We might call gravity a mental boson.
3) Since in platonic physics, all causation is mental, not physical, this presents no problem. If the
object of gravity is physical (baryonic) , it has a monad, and we can visually observe the effect of gravity on the object. But if the object is non-physical (nonbaryonic) if may still have mass, as dark matter is deduced to have, and being mental could pass right through physical bodies, as dark matter does. Being a mental object which is nonmonadic, it is a Secondness which we class as an intended. It moves through an intention of Mind according to the pre-established harmony, mostly according to Newtonian gravity.
4) Thus dark matter appears to be mental, not physical, and if this is so, mass would seem to be mental.
5) If mass is mental, as the above suggests. this accords with the above observation that gravity is mental. The two are a mental dual, operating by Mind as thoughts are.
—
Dr. Roger B Clough NIST (retired, 2000).
See my Leibniz site: https://rclough@verizon.academia.edu/RogerClough
For personal messages use rclough@verizon.net
no such thing as nondescript, idts
My hypothesis that Dark Matter is not a WIMP, but maybe is a deformation of space-time by which the curvature of space-time ALONE is the cause of the gravitational effect. Gravity is the consequence of the curvature of space-time. It may be possible that the structure of space-time itself could be warped without the presence of mass. Space-time has been shown to react like a fabric by warping, twisting, and propagating independent of mass. These properties have been proven with observations of gravitational lensing, frame dragging, and now gravitational waves. Fabrics can be stretched, pressured, and/or heated to the point of deformation. Such extreme conditions were all present during inflation, so it is plausible that space-time’s elastic nature could have hit its yield point and permanently deformed. Therefore, if gravity is the consequence of the warping of space-time, and fabrics can be permanently deformed, then a deformation could create a gravitational effect independent of mass. DM could be a microscopic black holes with no mass at the center, so they wouldn't lose their strength via Hawking Radiation.
Prediction: Spacetime's elastic property hits a yield point, so only that part of geodesic's "stretch marks" would remain after inflation stopped. These steep gravitational wells would not follow the inverse square law.
They would be steep tiny gravity wells.
See what ever matter in question only heat and cold matter will be found across that is space philosophy and theory of existence also. That is called opposite direction or opponent.
In hindi it is called aag and Pani ka saath hei mean fire and water living together that is earth (water) and solar (sun) existence
IF DARK ENERGY EXISTS CANT WE INVENT DARK ENERGY PANELS LIKE SOLAR ENERGY PANELS AND GENERATE ELECTRICITY
Dark matter is , a unexplainable void of space time light, right, so why cand it be a magnetic force of negativ kenitic energy, and it's collided with a same energy like how tornados are created