Explanipedia

Exploring the binary origin of B and Be rapid rotators Open

Jonathan Labadie-Bartz, M. W. Suffak, C. E. Jones, Yaël Nazé, K. G. Gayley , et al. · 2025

High-spatial-resolution simulations of Be star disks in binary systems Open

A. C. Rubio, Aulus Cavalieri Carciofí, K. S. Bjorkman, Tajan H. de Amorim, Atsuo T. Okazaki , et al. · 2025

Context. In recent decades, binarity among O and B stars has been shown to be key in our understanding of their birth, evolution, and death. For the particular case of Be stars, binarity might be the cause for their spinup, which comprises…

Decretion disc evolution and neutron star accretion in short-period eccentric Be/X-ray binaries Open

Rina G. Rast, C. E. Jones, M. W. Suffak, A. C. Carciofi · 2025

We examine Be star discs in highly eccentric Be/X-ray systems. We use a three-dimensional smoothed particle hydrodynamics code to model the structure of the Be star disc and investigate its interactions with the secondary star over time. W…

Decretion disc evolution and neutron star accretion in short-period eccentric Be/X-ray binaries Open

Rina G. Rast, C. E. Jones, M. W. Suffak, Aulus Cavalieri Carciofí · 2025

We examine Be star discs in highly eccentric Be/X-ray systems. We use a three-dimensional smoothed particle hydrodynamics (SPH) code to model the structure of the Be star disc and investigate its interactions with the secondary star over t…

Investigating Kozai–Lidov oscillations and disc tearing in Be star discs Open

M. W. Suffak, C. E. Jones, A. C. Carciofi · 2024

Recent simulations of Be stars in misaligned binary systems have revealed that misalignment between the disc and binary orbit can cause the disc to undergo Kozai–Lidov (KL) oscillations or disc tearing. We build on our previous suite of th…

Investigating Kozai-Lidov Oscillations and Disc Tearing in Be Star Discs Open

M. W. Suffak, C. E. Jones, A. C. Carciofi · 2024

Recent simulations of Be stars in misaligned binary systems have revealed that misalignment between the disc and binary orbit can cause the disc to undergo Kozai-Lidov (KL) oscillations or disc-tearing. We build on our previous suite of th…

Evolution of the Disk in the Be Binary δ Scorpii Probed during Three Periastron Passages Open

Rina G. Rast, C. E. Jones, A. C. Carciofi, M. W. Suffak, A. C. Fonseca Silva , et al. · 2024

We examine the evolution of the disk surrounding the Be star in the highly eccentric 10.8 yr binary system δ Scorpii over its three most recent periastron passages. V -band and B − V photometry, along with H α spectroscopy, are combined wi…

Evolution of the disk in the Be binary $δ$ Scorpii probed during three periastron passages Open

Rina G. Rast, C. E. Jones, A. C. Carciofi, M. W. Suffak, A. C. F. Silva , et al. · 2024

We examine the evolution of the disk surrounding the Be star in the highly eccentric binary system $δ$ Scorpii over its three most recent periastron passages. $V$-band and $B-V$ photometry, along with H$α$ spectroscopy are combined with a …

Disc tearing in a Be star: predicted 3D observations Open

M. W. Suffak, C. E. Jones, A. C. Carciofi · 2023

We build on our previous work involving smoothed particle hydrodynamic simulations of Be stars, by using the model that exhibited disc tearing as input into the three-dimensional Monte Carlo radiative transfer code hdust to predict observa…

Disc Tearing in a Be Star: Predicted 3D Observations Open

M. W. Suffak, C. E. Jones, A. C. Carciofi · 2023

We build on our previous work involving smoothed particle hydrodynamic simulations of Be stars, by using the model that exhibited disc tearing as input into the three-dimensional Monte Carlo radiative transfer code HDUST to predict observa…

Bayesian sampling with BeAtlas, a grid of synthetic Be star spectra I. Recovering the fundamental parameters of αEri and βCMi Open

A. C. Rubio, A. C. Carciofi, P. Santos, B. C. Mota, R. G. Vieira , et al. · 2023

Classical Be stars are fast rotating, near main sequence B-type stars. The rotation and the presence of circumstellar discs profoundly modify the observables of active Be stars. Our goal is to infer stellar and disc parameters, as well as …

Non-LTE Monte Carlo Radiative Transfer. III. The thermal properties of Tilted and Warped Be Star Discs Open

M. W. Suffak, C. E. Jones, A. C. Carciofi, Tajan H. de Amorim · 2023

We use the three-dimensional Monte Carlo radiative transfer code HDUST to model Be stars where the disc is tilted from the equatorial plane of the star. We compute 128 models across 4 spectral types, B0, B2, B5 and B8, tilting the disc by …

Strong Variability in AzV 493, an Extreme Oe-type Star in the SMC Open

M. S. Oey, N. Castro, Mathieu Renzo, Irene Vargas-Salazar, M. W. Suffak , et al. · 2023

We present 18 yr of OGLE photometry together with spectra obtained over 12 yr revealing that the early Oe star AzV 493 shows strong photometric (Δ I < 1.2 mag) and spectroscopic variability with a dominant, 14.6 yr pattern and ∼40 day osci…

Growth and dissipation of Be star discs in misaligned binary systems Open

M. W. Suffak, C. E. Jones, A. C. Carciofi · 2021

We use a three-dimensional smoothed particle hydrodynamics code to simulate growth and dissipation of Be star discs in systems where the binary orbit is misaligned with respect to the spin axis of the primary star. We investigate six diffe…

The Large-scale Behavior in the Disk of δ Scorpii from 2000 to 2018 Open

M. W. Suffak, C. E. Jones, C. Tycner, Gregory W. Henry, A. C. Carciofi , et al. · 2020

We model the circumstellar disk of δ Sco using the three-dimensional Monte Carlo radiative transfer code HDUST in order to quantify the large-scale changes in the disk through the years 2000–2018, and to see if these changes can be attribu…

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