Analysis of the circumstellar environment of the B[e] star HD 45677 (FS CMa)

Abstract

We studied the circumstellar environment of the B[e] star HD 45677 through the analysis of the emission lines from ionized metals. We used the statistical approach of the self absorption curve method (SAC) to derive physical parameters of the line emitting region. The Fe II and Cr II double-peaked emission line structure is explained by the presence of a thin absorption component red shifted by ~3 km/s. This absorption component can be interpreted geometricaly as being due to infalling material perpendicularly to the disk seen nearly pole-on, as indicated by the emission line structure. The Cr II and Fe II emission lines have a complex structure with two (narrow and broad) components, of 45 and 180 km/s FWHM for the permitted lines and 25 and 100 km/s FWHM for the forbidden ones, respectively. We argue that the narrow components are principaly emitted by an optically thin disk seen nearly pole-on, in a region whose minimum radius is estimated to be 4 10^12 cm, while the broad ones are formed in a disk-linked wind.

14 pages, submitted to Astronomy and Astrophysics

References in corpus (2)

• Kinematical structure of the circumstellar environments of galactic B[e]-type stars
• The Stellar Composition of the Star Formation Region CMa R1 -- III. A new outburst of the Be star component in Z CMa

Cited by in corpus (4)

• First detections of FS Canis Majoris stars in clusters. Evolutionary state as constrained by coeval massive stars
• A Polarimetric Study of the B[e] star HD 45677
• Searching for molecular hydrogen mid-infrared emission in the circumstellar environments of Herbig Be stars
• Variation of fluxes of RR Tel emission lines measured in 2000 with respect to 1996