Category: astrophysics

Rho Ophiuchi Wide Field

Stars, Dust, and Gas near NGC 3572

M95: Spiral Galaxy with an Inner Ring

This is the brightest so-called milli-second pulsar known. This old pulsar has been spun up by the accretion of material from a binary companion star as it expands in its red giant phase. The accretion process results in orbital angular momentum of the companion star being converted to rotational angular momentum of the neutron star, which is now rotating about 174 times a second. It spins so fast that the signal sounds like an overactive bumble-bee. This recording has been made with the Parkes radio telescope in Australia. source

This pulsar lies near the centre of the Vela supernova remnant, which is the debris of the explosion of a massive star about 10,000 years ago. The pulsar (a so-called neutron star) is the collapsed core of this star, rotating with a period of 89 milliseconds or about 11 times a second. This recording has been made with the Parkes radio telescope in Australia.
click here to see the animation / source

A New Signal for a Neutron Star Collision Discovered

  • A neutron star merger without an observed gamma-ray burst has been discovered using NASA’s Chandra X-ray Observatory.
  • This result gives astronomers another way to track down neutron star mergers as well new information about their interiors.
  • This source, called XT2, is located in the Chandra Deep Field-South, the deepest X-ray image ever obtained.
  • By studying how XT2 changed in X-ray brightness, astronomers were able to identify it as two neutron stars that merged into a larger one. read more

Clouds of the Large Magellanic Cloud

The Galaxy, the Jet, and the Black Hole

Latest Hubble Measurements Suggest Disparity in Hubble Constant Calculations is not a Fluke

Southern Cross to Eta Carinae