16th of January 2020 |
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ATCA observations of the SCORPIO field |
by Ingallinera et al. |
Ingallinera et al. present a catalogue of a large sample of extended
radio sources in the SCORPIO field, observed and resolved by the
Australia Telescope Compact Array. SCORPIO, a pathfinder project for
addressing the early operations of the Australia SKA Pathfinder, is a
survey of ∼5 square degrees around the plane of our Galaxy, conducted
between 1.4 and 3.1 GHz with an angular resolution of about 10
arc-seconds. It is aimed at understanding the scientific and technical
challenges to be faced by future Galactic surveys. With the ability to
recover angular scales up to 4 arc-minutes, 99 extended sources were
found, 35 of them detected for the first time. Studying the radio
morphology and comparing the radio emission with infra-red
observations led to proposed identification of 6 sources as new H II
regions, 2 as new planetary nebulae, 2 as new luminous blue variable
or Wolf–Rayet stars and 3 as new supernova remnants.
The image above shows a two-color image of the known H II region SCO J170054-421917 (the ATCA radio data in red, the GLIMPSE 8 µm infra-red data in cyan). It is apparent that the prominent 8-µm emission completely wraps around the radio. More details are given in the paper, published in Monthly Notices of the Royal Astronomical Society. |