84 citations · 697 across the 15 of their papers we have counts for
13 papers · 1 filter
Lupus DANCe. Census of stars and 6D structure with Gaia-DR2 data
P. A. B. Galli, H. Bouy, J. Olivares +8
Context: Lupus is recognised as one of the closest star-forming regions, but the lack of trigonometric parallaxes in the pre-Gaia era hampered many studies on the kinematic propert…
Prevalence of SED turndown among classical Be stars: Are all Be stars close binaries?
Robert Klement, A. C. Carciofi, T. Rivinius +16
Rapid rotation is a fundamental characteristic of classical Be stars and a crucial property allowing for the formation of their circumstellar disks. Past evolution in a mass and an…
The life cycles of Be viscous decretion discs: The case of ω CMa
M. R. Ghoreyshi, A. C. Carciofi, L. R. Rimulo +6
We analyzed V-band photometry of the Be star ω CMa, obtained during the last four decades, during which the star went through four complete cycles of disc formation and dissipation…
The life cycles of Be viscous decretion discs: fundamental disc parameters of 54 SMC Be stars
Leandro Rocha Rímulo, Alex Cavaliéri Carciofi, Rodrigo Georgetti Vieira +7
Be stars are main-sequence massive stars with emission features in their spectrum, which originates in circumstellar gaseous discs. Even though the viscous decretion disc (VDD) mod…
Ages of the Bulge globular clusters NGC 6522 and NGC 6626 (M28) from HST Proper-motion-cleaned Color-Magnitude Diagrams
L. O. Kerber, D. Nardiello, S. Ortolani +5
Bulge globular clusters (GCs) with metallicities [Fe/H] <~ -1.0 and blue horizontal branches are candidates to harbor the oldest populations in the Galaxy. Based on the analysis of…
The viscous disk properties of 80 Be stars
Rodrigo G. Vieira, Alex C. Carciofi
We investigated the properties of Be star disks, using the time dependent viscous decretion disk (VDD) model to interpret their mid-infrared continuum fluxes. Besides estimati…
The life cycles of Be viscous decretion discs: time-dependent modelling of infrared continuum observations
Rodrigo G. Vieira, Alex C. Carciofi, Jon E. Bjorkman +3
We apply the viscous decretion disc (VDD) model to interpret the infrared disc continuum emission of 80 Be stars observed in different epochs. In this way, we determined 169 specif…
Revealing the structure of the outer disks of Be stars
R. Klement, A. C. Carciofi, T. Rivinius +9
Context. The structure of the inner parts of Be star disks (20 stellar radii) is well explained by the viscous decretion disk (VDD) model, which is able to reproduce the observable…
Be discs in binary systems I. Coplanar orbits
Despina Panoglou, Alex C. Carciofi, Rodrigo G. Vieira +4
Be stars are surrounded by outflowing circumstellar matter structured in the form of decretion discs. They are often members of binary systems, where it is expected that the decret…
Non-isothermal effects on Be disks
Rodrigo G. Vieira, Alex C. Carciofi, Jon E. Bjorkman
In the last decade, the viscous decretion disk model has emerged as the new paradigm for Be star disks. In this contribution, we propose a simple analytical model to estimate the c…
The pseudo-photosphere model for the continuum emission of gaseous discs
Rodrigo G. Vieira, Alex C. Carciofi, Jon E. Bjorkman
We investigate the continuum emission of viscous decretion discs around Be stars in this paper. The results obtained from non-LTE (local thermodynamic equilibrium) radiative transf…
High-resolution Br-gamma spectro-interferometry of the transitional Herbig Ae/Be star HD 100546: a Keplerian gaseous disc inside the inner rim
I. Mendigutía, W. J. de Wit, R. D. Oudmaijer +4
We present spatially and spectrally resolved Br-gamma emission around the planet-hosting, transitional Herbig Ae/Be star HD 100546. Aiming to gain insight into the physical origin…
Distinguishing post-AGB impostors in a sample of pre-main sequence stars
Rodrigo G. Vieira, Jane Gregorio-Hetem, Annibal Hetem +2
A sample of 27 sources, catalogued as pre-main sequence stars by the Pico dos Dias Survey (PDS), is analyzed to investigate a possible contamination by post-AGB stars. The far-infr…