Latest Breaking News On - Australian square kilometre array pathfinder - Page 4 : comparemela.com

A new class of extragalactic astronomical sources discovered in 2021, named odd radio circles (ORCs)1, are large rings of faint, diffuse radio continuum emission spanning approximately 1 arcminute on the sky. Galaxies at the centres of several ORCs have photometric redshifts of z ≃ 0.3–0.6, implying physical scales of several 100 kpc in diameter for the radio emission, the origin of which is unknown. Here we report spectroscopic data on an ORC including strong [O ii] emission tracing ionized gas in the central galaxy of ORC4 at z = 0.4512. The physical extent of the [O ii] emission is approximately 40 kpc in diameter, larger than expected for a typical early-type galaxy2 but an order of magnitude smaller than the large-scale radio continuum emission. We detect an approximately 200 km s−1 velocity gradient across the [O ii] nebula, as well as a high velocity dispersion of approximately 180 km s−1.

Western australiaPlanck collaborationet alLibrary of fast radiative shock modelsAstrophysics source code librarySloan digital skyEvolutionary mapAustralian square kilometre arrayAustralian square kilometre array pathfinderBoolardy engineering testGiant meterwave radioKeck cosmic web imager integral fieldFast radiative shockHubble space telescopeSource code librarySloan digital sky surveyWide field infrared survey explorer