0000000000395058

AUTHOR

A. I. Gómez De Castro

showing 3 related works from this author

Formation of X-ray emitting stationary shocks in magnetized protostellar jets

2016

X-ray observations of protostellar jets show evidence of strong shocks heating the plasma up to temperatures of a few million degrees. In some cases, the shocked features appear to be stationary. They are interpreted as shock diamonds. We aim at investigating the physics that guides the formation of X-ray emitting stationary shocks in protostellar jets, the role of the magnetic field in determining the location, stability, and detectability in X-rays of these shocks, and the physical properties of the shocked plasma. We performed a set of 2.5-dimensional magnetohydrodynamic numerical simulations modelling supersonic jets ramming into a magnetized medium and explored different configurations…

AstrofísicaMagnetohydrodynamics (MHD)010504 meteorology & atmospheric sciencesRadiative coolingAstrophysics::High Energy Astrophysical PhenomenaISM: structureFOS: Physical sciencesAstrophysics01 natural sciencesISM: magnetic field0103 physical sciencesShock diamondRadiative transfer010303 astronomy & astrophysicsISM: jets and outflowSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Jet (fluid)Astronomy and AstrophysicsPlasmaAstronomy and AstrophysicThermal conductionX-rays: ISMShock (mechanics)Magnetic fieldAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceStars: protostarAstrophysics - High Energy Astrophysical Phenomena
researchProduct

Structure of X-ray emitting jets close to the launching site: from embedded to disk-bearing sources

2018

Several observations of stellar jets show evidence of X-ray emitting shocks close to the launching site. In some cases, the shocked features appear to be stationary, also for YSOs at different stages of evolution. We study the case of HH 154, the jet originating from the embedded binary Class 0/I protostar IRS 5, and the case of the jet associated to DG Tau, a more evolved Class II disk-bearing source or Classical T Tauri star (CTTS), both located in the Taurus star-forming region. We aim at investigating the effect of perturbations in X-ray emitting stationary shocks in stellar jets; the stability and detectability in X-rays of these shocks; and explore the differences in jets from Class 0…

PhysicsJet (fluid)010504 meteorology & atmospheric sciencesAstrophysics::High Energy Astrophysical PhenomenaYoung stellar objectFOS: Physical sciencesAstronomy and AstrophysicsContext (language use)AstrophysicsParameter space01 natural sciencesLuminosityShock (mechanics)T Tauri starAstrophysics - Solar and Stellar Astrophysics13. Climate actionSpace and Planetary Science0103 physical sciencesProtostar010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy Astrophysics0105 earth and related environmental sciences
researchProduct

On the Origin of the X-Ray Emission in Protostellar Jets Close to the Launching Site

2019

Observations of stellar jets show evidence of X-ray emitting shocks close to the launching site. In some cases, the shocked features appear to be stationary (e.g. HH 154 and DG Tau). We aim at investigating the origin of X-ray emission and the effect of perturbations in X-ray emitting stationary shocks in stellar jets. We performed a set of 2.5-dimensional MHD numerical simulations modelling supersonic pulsed jets ramming into a magnetized medium, exploring different parameters for the model. We consider two cases: a jet less dense than the ambient medium (HH 154), and a jet denser than the ambient (DG Tau). In both cases, we found that the jet is collimated by the magnetic field forming a …

PhysicsJet (fluid)Shock (fluid dynamics)Astrophysics::High Energy Astrophysical PhenomenaX-raySupersonic speedAstrophysicsMagnetohydrodynamicsAstrophysics::Galaxy AstrophysicsCollimated lightMagnetic field
researchProduct