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Description
  • B[e] supergiants are known to possess geometrically thick dusty disks. Disk-forming wind models in the literature have, however, been found to be insufficient in reproducing the observed dust emission. Based on our high-resolution optical spectroscopy and model results, we propose a revised scenario for the non-spherical winds of B[e] supergiants: a normal B-type line-driven polar wind and an outflowing disk-forming wind that is neutral in hydrogen at, or very close to the stellar surface. This hydrogen neutral outflowing disk scenario provides an ideal environment for efficient dust formation. Our modeling further delivers a density contrast between equatorial and polar wind of c. 10, which has to be considered as a lower limit.
  • B[e] supergiants are known to possess geometrically thick dusty disks. Disk-forming wind models in the literature have, however, been found to be insufficient in reproducing the observed dust emission. Based on our high-resolution optical spectroscopy and model results, we propose a revised scenario for the non-spherical winds of B[e] supergiants: a normal B-type line-driven polar wind and an outflowing disk-forming wind that is neutral in hydrogen at, or very close to the stellar surface. This hydrogen neutral outflowing disk scenario provides an ideal environment for efficient dust formation. Our modeling further delivers a density contrast between equatorial and polar wind of c. 10, which has to be considered as a lower limit. (en)
  • B[e] veleobři jsou známy svým geometricky tlustým diskem. Současné modely hvězdného větru nejsou schopny vysvětlit přítomnost prachu v disku. Na základě optických spekter s vysokým rozlišením a výsledků modelování navrhujeme nový scénář nesférického větru B[e] veleobrů: zářením hnaný vítr normální Be hvězdy v polárních oblastech a vítr tvořící disk neutrálního vodíku v okolí povrchu hvězdy. Tento disk neutrálního vodíku tvoří ideální prostředí pro vznik prachu. Naše modely ukazují na poměr hustoty mezi rovníkem a pólem okolo 10, což je pokládáno za spodní hranici. (cs)
Title
  • On the hydrogen neutral outflowing disks of B[e] supergiants
  • On the hydrogen neutral outflowing disks of B[e] supergiants (en)
  • Studium disku neutrálního vodíku okolo B[e] veleobrů (cs)
skos:prefLabel
  • On the hydrogen neutral outflowing disks of B[e] supergiants
  • On the hydrogen neutral outflowing disks of B[e] supergiants (en)
  • Studium disku neutrálního vodíku okolo B[e] veleobrů (cs)
skos:notation
  • RIV/67985815:_____/07:00095084!RIV08-AV0-67985815
http://linked.open.../vavai/riv/strany
  • 627;634
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA205/04/1267), Z(AV0Z10030501)
http://linked.open...iv/cisloPeriodika
  • 2
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
  • Kraus, Michaela
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 439378
http://linked.open...ai/riv/idVysledku
  • RIV/67985815:_____/07:00095084
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • supergiants; winds; outflows (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • FR - Francouzská republika
http://linked.open...ontrolniKodProRIV
  • [BBD7FD40FBE2]
http://linked.open...i/riv/nazevZdroje
  • Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 463
http://linked.open...iv/tvurceVysledku
  • Borges Fernandes, M.
  • Kraus, Michaela
  • de Araújo, F. X.
http://linked.open...n/vavai/riv/zamer
issn
  • 0004-6361
number of pages
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