Year: 2024
Type: article
Abstract: A common envelope (CE) is proposed as the origin of the early post-outburst spectra of many novae. A simple model is proposed to explain the properties of the CE based on the emission line strengths and an assumed density distribution. Rapid changes in the spectrum during post-outburst decline are suggested as possible evidence for a CE. Time-resolved spectra from the ARAS group show sudden spectral shifts that are correlated with detected γ-ray emission, suggestive of its possible origin on the white dwarf that produces a change in condition within the CE. Episodic mass loss, formation of transient heavy element absorption systems, and dissipation of the CE may possibly be triggered by γ-ray emission.
Source: The Astrophysical Journal
Authors: Robert Williams, Russell Ryan, Richard Rudy
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
OpenAlex ID: W4404081924