Browse Physics

Sort by:  
Per Page:   Display:  




Valid search terms include: subject, keyword, author of article, author of highlighted article, article citation (e.g. Physics 3, 16 (2011))

1.
Viewpoint

Positrons Galore

Image Thumbnail
Stephane Coutu, Physics 6, 40 (2013) – Published April 3, 2013
The first results from the space-borne Alpha Magnetic Spectrometer confirm an unexplained excess of high-energy positrons in Earth-bound cosmic rays.
2.
Viewpoint

Cosmic Microwave Background Carries Imprint of Moving Galaxies

Image Thumbnail
Gilbert P. Holder, Physics 5, 81 (2012) – Published July 23, 2012
Observations of the way light scatters from large astrophysical bodies provides independent confirmation of the standard model of cosmology.
3.
Viewpoint

A distorted view of the early universe

Image Thumbnail
Stephen Boughn, Physics 4, 53 (2011) – Published July 5, 2011
Gravitational lensing distorts maps of the cosmic microwave background, providing yet another way of probing the matter and energy content of the universe.
4.
Viewpoint

Cosmic smoothness

Image Thumbnail
Michael J. Hudson, Physics 4, 47 (2011) – Published June 13, 2011
On the largest distance scales, the distribution of galaxies appears to be clumpier than the standard cosmological model predicts.
5.
Viewpoint

Can we test inflationary expansion of the early universe?

Image Thumbnail
Arthur Kosowsky, Physics 3, 103 (2010) – Published December 6, 2010
A set of proposed relations among observable quantities may allow strong tests of whether a rapid expansion of the very early universe produced the seeds of the large-scale structure we see today.
6.
Viewpoint

Cosmic light matter probes heavy dark matter

Image Thumbnail
Bruce Winstein and Kathryn M. Zurek, Physics 2, 37 (2009) – Published May 4, 2009
New results from the Fermi Gamma-Ray Space Telescope, the most precise to date in the energy range 20GeV to 1TeV, should help resolve whether cosmic rays composed of the lightest charged particles, i.e., electrons and positrons, come from dark matter or some other astrophysical source.
7.
Viewpoint

Debating the source of a rare particle

Image Thumbnail
Simon Swordy, Physics 2, 10 (2009) – Published February 2, 2009
Many cosmologists believe that antiprotons in cosmic rays come from the annihilation of dark matter. Data from the PAMELA experiment on board a Russian satellite provide an important test of this possibility.
8.
Viewpoint

Scaling up the search for dark matter

Image Thumbnail
Karl van Bibber, Physics 2, 2 (2009) – Published January 5, 2009
New upper limits on the spin-independent interaction of WIMPs and nucleons marks the latest volley in the worldwide effort to detect and identify particle dark matter.