STELLAR ATMOSPHERES; EMISSION SPECTRA; LINE SPECTRA; NEBULAE
Abstract :
[en] Different equivalent widths and line displacements of Hbeta and Fe II are observed in spectra of two condensations located within the reflection nebula surrounding HD 87643: they indicate important relative motions (Deltav â ¡ 150 km s[SUP]-1[/SUP]) between various parts of the nebulosity and demonstrate that the stellar atmosphere in which the lines are formed is not isotropic and/or not homogeneous. The spectrum of another reflection nebula situated in the vicinity of HD 87643 is also briefly described.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Swings, Jean-Pierre ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
More on the reflection nebula surrounding HD 87643 and the non-uniform atmosphere of the central star