The yellow hypergiant - B[e] supergiant connection

B[e] supergiants and yellow hypergiants share a number of common properties regarding their circumstellar environments. Using the forbidden [O I] and [Ca II] lines as disk tracers, we suggest the presence of a Keplerian disk or ring around the yellow hypergiant V509 Cas and confirm the pole-on inner...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Aret, Anna, Kraus, Michaela, Kolka, Indrek, Maravelias, Grigoris
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 18.11.2016
Subjects
Disks
Stability
Tracers
Online AccessGet full text

Cover

More Information
Summary:B[e] supergiants and yellow hypergiants share a number of common properties regarding their circumstellar environments. Using the forbidden [O I] and [Ca II] lines as disk tracers, we suggest the presence of a Keplerian disk or ring around the yellow hypergiant V509 Cas and confirm the pole-on inner disk around V1302 Aql. These findings indicate a change in mass-loss behavior from spherical in cooler yellow hypergiants to axisymmetric in the hotter ones during the passage through the Yellow Void. The accumulation of material in the equatorial plane reminds of the disks of B[e] supergiants, supporting the suggestion that yellow hypergiants might appear as B[e] supergiants after they reach the blue edge of the yellow instability domain.
ISSN:2331-8422