Since gravitational waves are now on the tip of every astronomer’s tongue, today’s post looks back at a classic paper’s key result that is quintessential in the search for gravitational waves using pulsar timing arrays.
Sometimes a mystery can hide in apparently plain things. Astronomers have just discovered that a delta Scuti star known for over 40 years is actually something entirely different and full of peculiarities.
Image via M. Garlick/University of Warwick, ESA/Hubble.
Today’s paper investigates the mass composition of galactic cosmic rays using radio astronomy measurements
The authors of today’s paper wanted to use the best available instruments to image HR 8799’s outer debris disk, and look for whether “planet b” appears to have cleared out the disk, in the same way Neptune did for the Kuiper Belt.
Mysterious, brief bursts of radio have been detected many times from what looks to be the same source for the first time.
These hot galaxies show signs of AGN and starburst activity occurring within their dusty interiors.