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

Abstract

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

arXiv comment12 pages, 8 figures

References in corpus (31)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• scikit-image: Image processing in Python
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• galpy: A Python Library for Galactic Dynamics
• An Extended Grid of Nova Models: II. The Parameter Space of Nova Outbursts
• First science with SALT: peering at the accreting polar caps of the eclipsing polar SDSS J015543.40+002807.2
• Vertical structure of a supernova-driven turbulent magnetized ISM
• Growing White Dwarfs to the Chandrasekhar Limit: The Parameter Space of the Single Degenerate SNIa Channel
• The Masses and Accretion Rates of White Dwarfs in Classical and Recurrent Novae
• Exquisite Nova Light Curves from the Solar Mass Ejection Imager (SMEI)
• M31N 2008-12a - the remarkable recurrent nova in M31: Pan-chromatic observations of the 2015 eruption
• The Origin of the Hot Gas in the Galactic Halo: Confronting Models with XMM-Newton Observations
• A remarkable recurrent nova in M31 - The optical observations
• The Nova Shell and Evolution of the Recurrent Nova T Pyxidis
• Identifying and Quantifying Recurrent Novae Masquerading as Classical Novae
• Nova Scorpius 1437 A.D. is now a dwarf nova, age-dated by its proper motion
• Image Subtraction in Fourier Space
• A Recurrent Nova Super-Remnant in the Andromeda Galaxy
• The Inter-Eruption Timescale of Classical Novae from Expansion of the Z Camelopardalis Shell
• GK Per (Nova Persei 1901): HST Imagery and Spectroscopy of the Ejecta, and First Spectrum of the Jet-Like Feature
• Deep Halpha imagery of the Eridanus shells
• The luminosity evolution of nova shells -- I. A new analysis of old data
• The Nova KT Eri Is a Recurrent Nova With a Recurrence Time-Scale of 40-50 Years
• No Neon, but Jets in the Remarkable Recurrent Nova M31N 2008-12a? - Hubble Space Telescope Spectroscopy of the 2015 Eruption
• The Origin of the Hot Gas in the Galactic Halo: Testing Galactic Fountain Models' X-ray Emission
• Introducing the Condor Array Telescope. 1. Motivation, Configuration, and Performance
• On the Observability of Recurrent Nova Super-Remnants
• Introducing the Condor Array Telescope. II. Deep imaging observations of the edge-on spiral galaxy NGC 5907 and the NGC 5866 Group: yet another view of the iconic stellar stream

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