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RAD@home discovery of a one-sided radio jet hitting the companion galaxy

Published online by Cambridge University Press:  11 September 2023

Ananda Hota
Affiliation:
UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Mumbai-400098, India RAD@home Astronomy Collaboratory, Kharghar, Navi Mumbai, 410210, India
Pratik Dabhade
Affiliation:
RAD@home Astronomy Collaboratory, Kharghar, Navi Mumbai, 410210, India Instituto de Astrofísica de Canarias, Calle Vía Láctea, s/n, E-38205, La Laguna, Tenerife, Spain
Sravani Vaddi
Affiliation:
RAD@home Astronomy Collaboratory, Kharghar, Navi Mumbai, 410210, India Arecibo Observatory, NAIC, HC3 Box 53995, Arecibo, Puerto Rico, PR 00612, USA
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Abstract

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Minkowski’s Object and ‘Death Star galaxy’ are two of the famous cases of rare instances when a radio jet has been observed to directly hit a neighbouring galaxy. RAD12, the RAD@home citizen science discovery with GMRT being presented here, is not only a new system being added to nearly half a dozen rare cases known so far but also the first case where the neighbouring galaxy is not a minor/dwarf companion but a galaxy bigger than the host of the radio jet. Additionally, the jet appears to be one-sided and the jet after interaction completely stops and forms a bubble inflating laterally which is unlike previous cases of minor deviation or loss of collimation. Since the nature of radio jet-ISM coupling is poorly understood so far, more discovery of objects like RAD12 will be important to the understanding of galaxy evolution through merger and AGN feedback.

Type
Contributed Paper
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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