Although astronomers often refer to brown dwarfs as "failed stars," scientists at the University of Delaware have discovered that at least one of these dim celestial objects can emit powerful flashes of light.
Scientists at Princeton University and the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) have developed a rigorous new method for modeling the accretion disk that feeds the supermassive black hole at the center of our Milky Way galaxy. The paper, published online in December in the journal Physical Review Letters, provides a much-needed foundation for simulation of the extraordinary processes involved.
On November 28, 1967, Jocelyn Bell Burnell and Anthony Hewish discovered the first Pulsar, a fast rotating neutron star that emits a beam of electromagnetic radiation. The radiation of a pulsar can only be observed when the beam of emission is pointing toward the Earth, much the way a lighthouse can only be seen when the light is pointed in the direction of an observer, and is responsible for the pulsed appearance of emission.
On November 22, 1944, British astrophysicist and philosopher Sir Arthur Stanley Eddington passed away. He became famous for his 1919 solar eclipse expedition to Principe, where he conducted astrophysical experiments to give proof for Albert Einstein's seminal theory of general relativity.
M. Brescia, G. Longo, and F. Pasian. Nuclear Instruments and Methods in Physics Research
Section A: Accelerators, Spectrometers, Detectors and
Associated Equipment623 (2):
845--849(2010)1rs International Conference on Frontiers in
R. Amorín, J. Vílchez, and E. Pérez-Montero. (2011)cite arxiv:1105.1477Comment: To appear in JENAM
Symposium "Dwarf Galaxies: Keys to Galaxy Formation
and Evolution", P. Papaderos, G. Hensler, S. Recchi
(eds.). Lisbon, September 2010, Springer Verlag, in