0000000001253401

AUTHOR

K. Arzner

showing 3 related works from this author

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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Accretion and Outflow-Related X-Rays in T Tauri Stars

2007

We report on accretion- and outflow-related X-rays from T Tauri stars, based on results from the "XMM-Newton Extended Survey of the Taurus Molecular Cloud." X-rays potentially form in shocks of accretion streams near the stellar surface, although we hypothesize that direct interactions between the streams and magnetic coronae may occur as well. We report on the discovery of a "soft excess" in accreting T Tauri stars supporting these scenarios. We further discuss a new type of X-ray source in jet-driving T Tauri stars. It shows a strongly absorbed coronal component and a very soft, weakly absorbed component probably related to shocks in microjets. The excessive coronal absorption points to d…

Physics010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesAccretion (astrophysics)T Tauri starSpace and Planetary Science0103 physical sciencesAstrophysics::Solar and Stellar AstrophysicsOutflowAstrophysics::Earth and Planetary Astrophysics010303 astronomy & astrophysicsAstrophysics::Galaxy Astrophysics
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A survey of young stars in the Taurus Molecular Cloud with XMM-Newton

2006

young starXMM-NewtonTauru
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