Introducing the Condor Array Telescope: IV. A possible nova super-remnant surrounding the putative recurrent nova KT Eridani

• DOI: 10.48550/arxiv.2310.17055
• Publication Date: 2023-01-01
• Authors: Michael M. Shara; Kenneth M. Lanzetta; James T. Garland; Stefan Gromoll; D. Valls‐Gabaud; Frederick M. Walter; John K. Webb; A. Y. Kniazev; L. J. Townsend; M. J. Darnley; M W Healy-Kalesh; J. M. Corral-Santana; L. Schmidtobreick
• Keywords: Nova (rocket)

Just 10 recurrent novae (RNe) - which erupt repeatedly on timescales shorter than one century are known in our Galaxy. The most extreme RN (located the Andromeda galaxy), M31N 2008-12a, undergoes a nova eruption every year, and is surrounded by vast "super-remnant", 134 pc extent. Simulations predict that all RNe should be similar shells, but previous searches have failed to detect them. KT Eri has recently been suggested RN, we used Condor Array Telescope image its environs through multiple narrowband filters. We report existence of large ($\sim$ 50 diameter), H$\,\alpha$-bright shell centered Eri, exactly as predicted. This strongly supports claim 11th Galactic nova, only second super-remnant. SALT spectra super-remnant demonstrate velocity width consistent with M31-2008-12a.