37 Papers
118 Citations
S. Štefl is an academic researcher from Atacama Large Millimeter Submillimeter Array. The author has contributed to research in topics: Stars & Be star. The author has an hindex of 14, co-authored 37 publications. Previous affiliations of S. Štefl include European Southern Observatory.
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Papers
Optical atmospheric extinction over Cerro Paranal
Ferdinando Patat,Sabine Moehler,Kieran O'Brien,Emanuela Pompei,Thomas Bensby,Giovanni Carraro,A. de Ugarte Postigo,Andrew J. Fox,I. Gavignaud,G. James,Heidi Korhonen,Cedric Ledoux,S. Randall,Hugues Sana,Jonathan Smoker,S. Štefl,Thomas Szeifert +16 more
TL;DR: In this paper, the authors used the LBLRTM radiative transfer code to estimate the column densities of the main molecular bands of O2,O 3,a nd H 2O.
Bright Be-shell stars
TL;DR: In this paper, the velocity law in most, if not all, disks of Be stars is roughly Keplerian and central quasi emission bumps (CQEs) in photospheric lines were found in 75% of all normal shell stars.
131
The spin-orbit alignment of the Fomalhaut planetary system probed by optical long baseline interferometry
TL;DR: The spin-orbit orientation of the Fomalhaut planetary system composed of a central A4V star, a debris disk, and a recently discovered planetary companion was discussed in this article.
The first determination of the viscosity parameter in the circumstellar disk of a Be Star
Alex C. Carciofi,Jon E. Bjorkman,Jon E. Bjorkman,S. Otero,Atsuo T. Okazaki,S. Štefl,Thomas Rivinius,Dietrich Baade,Xavier Haubois +8 more
TL;DR: In this paper, the authors present the first time-dependent models of the dissipation of a viscous decretion disk and determine that the viscosity parameter α = 1.0 ± 0.2, corresponding to a mass injection rate.
96
Revealing the structure of the outer disks of Be stars
Robert Klement,Robert Klement,Alex C. Carciofi,Thomas Rivinius,Lynn D. Matthews,R. G. Vieira,Richard Ignace,J. E. Bjorkman,Bruno Mota,Daniel M. Faes,A. D. Bratcher,Michel Curé,S. Štefl +12 more
TL;DR: In this article, the spectral energy distribution (SED) of a sample of six Be disks that have been observed in the radio to address the question of whether the observed turndown in the SED can be explained in the framework of the VDD model, including recent theoretical development for truncated Be disks in binary systems.