9 papers
Global simulations of accretion flows onto perturbers embedded in magnetized disks -I. MRI and jet formation in ideal MHD
Raúl O. Chametla, F. J. Sánchez-Salcedo, Martin E. Pessah +1
We present the highest resolution global MHD simulations to date of gas flow around a low mass a perturber with mass ratio , embedded in an accretion disk ar…
Intermediate-Mass Mergers: A New Scenario for Several FS CMa Stars
Daniela Korcakova, Nela Dvorakova, Iris Bermejo Lozano +6
We summarise the properties and nature of a peculiar group of B-type stars called FS CMa stars. These stars show the B[e] phenomenon, i.e., their spectra exhibit both forbidden emi…
Turbulence destroys thermal lobes around Mars-sized planetary embryos
R. O. Chametla, A. Moranchel-Basurto, F. J. Sánchez-Salcedo
The release of heat by a planetary embryo modifies the local density perturbations, forming thermal lobes in its vicinity, and thereby altering the torque exerted by the disk on th…
Dust back-reaction on gas around planets modifies the cold thermal torque
Raúl O. Chametla, OndÅej Chrenko, F. J. Sánchez-Salcedo +7
A nascent planet in a gas disk experiences radial migration due to the different torques which act on it. It has recently been shown that the torques produced by the gas and dust d…
Multipolar magnetic configuration: a trace of post-mergers events in circumstellar disks around FS CMa Stars
A. Moranchel-Basurto, D. Kocakova, M. Cemeljic +3
Context: Observations suggest that magnetic fields of disk-bearing stars may have non-dipolar configurations. However, the influence of these configurations on magnetospheric accre…
Resurgence of CO in a warm bubble around accreting protoplanets and its observability
O. Chrenko, S. Casassus, R. O. Chametla
The cold outer regions of protoplanetary disks are expected to contain a midplane-centered layer where gas-phase CO molecules freeze out and their overall abundance is low. The lay…