Optical and NIR data and modelling of nova V5668 Sgr

Abstract

We present HST optical images, Keck-OSIRIS NIR IFS data cubes and Keck-NIRC2 NIR images of nova V5668 Sgr from 2016 to 2019. The observations indicate enhanced emission at the polar caps and equatorial torus for low ionization lines, and enhanced high ionization emission lines only at the polar caps. The radial velocities are compatible with a homogeneous expansion velocity of v=590 km s${}^{-1}$ and a system inclination angle of 24${}^o$. These values were used to estimate an expansion parallax distance of 1200 $\pm$ 400 pc. The NIRC2 data indicate the presence of dust in 2016 and 2017, but no dust emission could be detected in 2019. The observational data were used for assembling 3D photoionization models of the ejecta. The model results indicate that the central source has a temperature of $1.88\times 10^5$ K and a luminosity of $1.6\times 10^{35}$ erg s${}^{-1}$ in August of 2017 (2.4 years post eruption), and that the shell has a mass of $6.3\times 10^{-5}$ M${}_{\odot }$. The models also suggest an anisotropy of the ionizing flux, possibly by the contribution from a luminous accretion disc.

References in corpus (27)

• The chemical composition of the Sun
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni
• A grid of synthetic ionizing spectra for very hot compact stars from NLTE model atmospheres
• Three-dimensional interstellar dust reddening maps of the Galactic plane
• The Thermonuclear Runaway and the Classical Nova Outburst
• Binary orbits as the driver of gamma-ray emission and mass ejection in classical novae
• Early optical spectra of nova V1369 Cen show presence of Lithium
• A Nova Outburst Powered by Shocks
• Fermi LAT Gamma-ray Detections of Classical Novae V1369 Centauri 2013 and V5668 Sagittarii 2015
• Early spectral evolution of classical novae: consistent evidence for multiple distinct outflows
• New results on 26Al production in classical novae
• Highly Enriched 7Be in the ejecta of Nova Sagittarii 2015 No. 2 (V5668 Sgr) and the Galactic Lithium origin
• Surface Hydrogen Modeling of Super Soft X-ray Sources: Are They Supernova Ia Progenitors?
• Obscuration effects in Super-Soft-Source X-ray spectra
• The Expanding Nebular Remnant of the Recurrent Nova RS Ophiuchi (2006): II. Modeling of Combined Hubble Space Telescope Imaging and Ground-based Spectroscopy
• The ${}^7$Be II Resonance Lines in Two Classical Novae V5668 Sgr and V2944 Oph
• From X-ray dips to eclipse: Witnessing disk reformation in the recurrent nova USco
• Surveying the X-ray Behavior of Novae as They Emit $\gamma$-rays
• The Temporal Development of Dust Formation and Destruction in Nova Sagittarii 2015#2 (V5668 Sgr): A Panchromatic Study
• HR Del remnant anatomy using 2-D spectral data and 3-D photoionization shell models
• Biases in Expansion Distances of Novae Arising from the Prolate Geometry of Nova Shells
• Internal Shocks from Variable Outflows in Classical Novae
• The Distance and Morphology of V723 Cassiopeiae (NOVA CASSIOPEIA 1995)
• The structure of a recent nova shell as observed by ALMA
• Radio light curves and imaging of the helium nova V445 Puppis reveal seven years of synchrotron emission
• 3D photoionization models of nova V723 Cas

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