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: http://www.atnf.csiro.au/ATNF-DailyImage/archive/2016/03-Feb-2016.html
Дата изменения: Unknown Дата индексирования: Sun Apr 10 09:17:36 2016 Кодировка: Поисковые слова: arp 220 |
3rd of February 2016 |
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Storm Stow at ATCA |
by Helga Dénes (CASS) |
The picture was taken on 1 February 2013 at
the Australia Telescope Compact Array (ATCA) while observing neutral hydrogen
(HI) in the galaxy IC 1993. IC 1993 is an HI poor spiral galaxy located at the
outskirts of the Fornax cluster. This galaxy most likely lost a significant
fraction of its hydrogen gas due to ram pressure stripping while it was moving
through the galaxy cluster. The observations of this galaxy and five other HI
poor galaxies are presented in Dénes et al. (2016). Storms are frequent during
the winter in Narrabri, where ATCA is located. Whenever there are strong winds
or lots of lightning strikes the antennas need to be in a safety mode to
protect them from damage from the storm. When the picture was taken the
antennas where in this safety mode taking a rest from the observations.
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