The SARAO MeerKAT Galactic Plane Survey extended source catalogue
C. Bordiu, S. Riggi, F. Bufano, F. Cavallaro, T. Cecconello, F., Camilo, G.Umana, W.D. Cotton, M.A. Thompson, M. Bietenholz, S. Goedhart, L.D., Anderson, C.S. Buemi, J.O. Chibueze, A. Ingallinera, P. Leto, S. Loru, M., Mutale, A. Rigby, C. Trigilio, G.M. Williams

TL;DR
This paper presents a comprehensive catalogue of over 16,500 extended radio sources from the MeerKAT Galactic Plane Survey, including their classification, properties, and potential for new discoveries in Galactic and extragalactic astronomy.
Contribution
The paper introduces a large, detailed catalogue of extended radio sources from MeerKAT, including classification and analysis methods, enhancing the understanding of Galactic and extragalactic radio emitters.
Findings
24% of sources are associated with known Galactic objects
33% are candidate extragalactic sources
43% remain unclassified
Abstract
We present a catalogue of extended radio sources from the SARAO MeerKAT Galactic Plane Survey (SMGPS). Compiled from 56 survey tiles and covering approximately 500 deg across the first, third, and fourth Galactic quadrants, the catalogue includes 16534 extended and diffuse sources with areas larger than 5 synthesised beams. Of them, 3891 (24\% of the total) are confidently associated with known Galactic radio-emitting objects in the literature, such as HII regions, supernova remnants, planetary nebulae, luminous blue variables, and Wolf-Rayet stars. A significant fraction of the remaining sources, 5462 (33\%), are candidate extragalactic sources, while 7181 (43\%) remain unclassified. Isolated radio filaments are excluded from the catalogue. The diversity of extended sources underscores MeerKAT's contribution to the completeness of censuses of Galactic radio emitters, and its…
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