High-velocity spectral features in V854 Centauri: evidence for dust formation?

Open Access
Publisher Website
Google Scholar
Abstract
Low-dispersion IUE spectra of V854 Cen show apparent shifts or splitting in the [λ2325 C II], λ2800 Mg II, λ2851 Mg I and λ2965 C I lines which, if kinematic, indicate velocities in excess of 1000 km s–1. The variations are seen in all the UV emission lines simultaneously. The line splitting seems to occur at times near phase 0.0 (maximum light) of the pulsation cycle of the star. Dust formation episodes in V854 Cen also occur at this phase. New high-dispersion spectra of V854 Cen of the Na I D lines show many high-velocity features, both red- and blueshifted, including one at almost – 400 km s–1. The line profile variations may be a spectral signature of the gas from which the dust is condensing.

This publication has 0 references indexed in Scilit: