Exploding Galaxies and other Catastrophysics

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Astrophysics and science politics that I consider interesting, in particular related to starburst galaxies and galactic winds.

Dave Strickland
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  • October 8, 2009
  • 10:15 AM

New mega ring around Saturn discovered using Spitzer

by Dave Strickland in Exploding Galaxies and other Catastrophysics

Infrared observations using the Spitzer Space Telescope, published by Verbiscer et al (2009, Nature), have revealed the largest known ring around Saturn, an annulus of very tenuous material extending between 6 million and 18 million kilometers from Saturn, and tilted by 27 degree from the plane of the traditional rings (which only extend out to ~240,000 km).The material in the new ring comes from the battered and cratered moon Phoebe. Of more interest, this new dust ring explains why the leading........ Read more »

Verbiscer, A., Skrutskie, M., & Hamilton, D. (2009) Saturn's largest ring. Nature. DOI: 10.1038/nature08515  

  • June 15, 2009
  • 10:02 AM

Its about time! A new radio supernova in Messier 82

by Dave Strickland in Exploding Galaxies and other Catastrophysics

Brunthaler et al (2009, A&A, 499, L17) have just reported the discovery of a new radio transient in the nucleus of the nearby starburst galaxy Messier 82 (M82).In short, radio telescopes see something now that wasn't there two years ago, and this is most probably a radio supernova, indeed, one of the closest supernova to Earth in the last five years.But why is this scientifically interesting?M82 has been called the "exploding galaxy" with good reason: huge filaments and arcs of very hot gas ........ Read more »

Brunthaler, A., Menten, K., Reid, M., Henkel, C., Bower, G., & Falcke, H. (2009) Discovery of a bright radio transient in M 82: a new radio supernova?. Astronomy and Astrophysics, 499(2). DOI: 10.1051/0004-6361/200912327  

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