The outflowing disks of B[e] supergiants and unclassified B[e] stars
Abstract
B[e] supergiants are known to possess outflowing cool disks but also some unclassified B[e] stars show clear indications for the presence of a neutral disk. We derive constraints on the disk mass loss rates, temperature distributions and disk opening angles for the Small Magellanic Cloud B[e] supergiant Hen S 18 and the unclassified galactic B[e] star Hen 2-90 by modeling the line luminosities of the [OI] lines arising in their optical spectrum. These lines are supposed to form in a hydrogen neutral disk. We find disk mass fluxes of order 3.4 10-4 g s-1 cm-2 and 5.5 10-1 g s-1cm-2 resulting in disk mass loss rates of 1.0 10-4 Msun yr-1 and 1.5 10-5 Msun yr-1 for Hen S 18 and Hen 2-90, respectively.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.