Roberts, I. D.I. D.Robertsvan Weeren, R. J.R. J.van WeerenDE GASPERIN, FrancescoFrancescoDE GASPERINBOTTEON, AndreaAndreaBOTTEONEdler, H. W.H. W.EdlerIGNESTI, AlessandroAlessandroIGNESTIMatijević, L.L.MatijevićTOMICIC, NEVENNEVENTOMICIC2025-05-192025-05-1920240004-6361http://hdl.handle.net/20.500.12386/37154We present the discovery of a 100 kpc low-frequency radio tail behind the nearby group galaxy, NGC 2276. The extent of this tail is a factor of ten larger than previously reported from higher-frequency radio and X-ray imaging. The radio morphology of the galaxy disc and tail suggest that the tail was produced via ram-pressure stripping, cementing NGC 2276 as the clearest known example of ram-pressure stripping in a low-mass group. With multi-frequency imaging, we extract radio continuum spectra between ∼50 MHz and 1.2 GHz as a function of projected distance along the tail. All of the spectra are well fit by a simple model of spectral ageing due to synchrotron and inverse-Compton losses. From these fits we estimate a velocity of 870 km s<SUP>‑1</SUP> for the stripped plasma across the plane of the sky, and a three-dimensional orbital velocity of 970 km s<SUP>‑1</SUP> for NGC 2276. The orbital speed that we derive is in excellent agreement with the previous estimates from an X-ray shock analysis, despite the completely independent methodology.STAMPAenArticle10.1051/0004-6361/2024506722-s2.0-85202957768https://www.aanda.org/articles/aa/full_html/2024/09/aa50672-24/aa50672-24.htmlhttp://arxiv.org/abs/2406.09221v12024A&A...689A..22RFIS/05 - ASTRONOMIA E ASTROFISICA