0000000000315241

AUTHOR

E. D. Feigelson

showing 3 related works from this author

Testing the Ability of Field Extrapolation Models to Predict the X-ray Emission Properties of Pre-Main Sequence Stars

2010

By extrapolating from observationally derived magnetic surface maps, obtained through Zeeman-Doppler imaging, models of stellar magnetospheres can be constructed. By assuming that the plasma trapped along the closed field lines is in hydrostatic equilibrium, coronal X-ray emission properties, such as the global X-ray emission measure and the amount of rotational modulation of X-ray emission, can be predicted. For pre-main sequence magnetospheres the analysis can be extended to incorporate accretion flows, and predict the amount of softer X-ray emission from accretion spots that would be observed. I will detail the preliminary results of an ambitious multi-wavelength, multi-observing site, a…

Settore FIS/05 - Astronomia E Astrofisicastellar activitymagnetic fieldstellar coronae
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The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST)

2007

(abridged:) The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus star formation region, using the XMM-Newton X-ray observatory to study the thermal structure, variability, and long-term evolution of hot plasma, to investigate the magnetic dynamo, and to search for new potential members of the association. Many targets are also studied in the optical, and high-resolution X-ray grating spectroscopy has been obtained for selected bright sources. The X-ray spectra have been coherently analyzed with two different thermal models (2-component thermal model, and a continuous emission measure distribution model). We present ov…

stars : pre-main sequence010504 meteorology & atmospheric sciencesAstrophysics::High Energy Astrophysical PhenomenaBrown dwarfFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesLuminosity[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]Observatory0103 physical sciencesProtostarAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsAstrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesPhysicsstars : formationStar formationMolecular cloudAstrophysics (astro-ph)Astronomy and AstrophysicsAccretion (astrophysics)Starsgravitational waves13. Climate actionSpace and Planetary ScienceX-rays : star
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Multi-wavelength observing of a forming solar-like star

2009

V2129 Oph is a 1.35 solar mass classical T Tauri star, known to possess a strong and complex magnetic field. By extrapolating from an observationally derived magnetic surface map, obtained through Zeeman-Doppler imaging, models of V2129 Oph's corona have been constructed, and used to make predictions regarding the global X-ray emission measure, the amount of modulation of X-ray emission, and the density of accretion shocks. In late June 2009 we will under take an ambitious multi-wavelength, multi-observing site, and near contemporaneous campaign, combining spectroscopic optical, nIR, UV, X-ray, spectropolarimetric and photometric monitoring. This will allow the validity of the 3D field topo…

Settore FIS/05 - Astronomia E AstrofisicaAstrophysics - Solar and Stellar AstrophysicsStar formationAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Solar and Stellar AstrophysicsFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysicsAstrophysics::Galaxy AstrophysicsSolar and Stellar Astrophysics (astro-ph.SR)
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