General Articles

An artist’s impression of what an active galactic nucleus might look like at close quarters. The accretion disk produces the brilliant light in the centre. The broad-line region is just above the accretion disk and lost in the glare. Dust clouds are being driven upwards by the intense radiation. Credit: Peter Z. Harrington

One black hole or two? Dust clouds can explain puzzling features of active galactic nuclei

Researchers at the University of California, Santa Cruz (UCSC), believe clouds of dust, rather than twin black holes, can explain the features found in active galactic nuclei (AGNs). The team publish their results today (14 June) in a paper in Monthly Notices of the Royal Astronomical Society. Many large galaxies have an AGN, a small bright …

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Moon plays lead role in new astronomical technique

Lunar occultation sky maps of Cygnus X-1 obtained using the Lunar Prospector Gamma-Ray Spectrometer. The features correspond to the location of the Moon’s horizon, projected onto the celestial sphere (equatorial coordinates), during intervals when Cygnus X-1 rose and set relative to the spacecraft. Also shown is an illustration of the Lunar Prospector spacecraft. Credit: Richard …

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Blowing bubbles in the Milky Way’s magnetic field

June 1, 2016 An international team of astronomers has discovered a possible connection between the magnetic fields of supernova remnants and that of our own Milky Way Galaxy. The study, recently published in the journal Astronomy & Astrophysics, found that the orientation of supernova remnants can help astronomers understand the nature and shape of the …

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