0000000000887356

AUTHOR

D. P. Huenemoerder

showing 2 related works from this author

The magnetosphere of the close accreting PMS binary V4046 Sgr AB

2013

We present a preliminary 3D potential field extrapolation model of the joint magnetosphere of the close accreting PMS binary V4046 Sgr. The model is derived from magnetic maps obtained as part of a coordinated optical and X-ray observing program.

Settore FIS/05 - Astronomia E AstrofisicaAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysics::Solar and Stellar AstrophysicsAstronomy and AstrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy Astrophysicsaccretion young stars magnetosphereProceedings of the International Astronomical Union
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V4046 Sgr: X-rays from accretion shock

2013

AbstractWe present results of the X-ray monitoring of V4046 Sgr, a close classical T Tauri star binary, with both components accreting material. The 360 ks long XMM observation allowed us to measure the plasma densities at different temperatures, and to check whether and how the density varies with time. We find that plasma at temperatures of 1–4 MK has high densities, and we observe correlated and simultaneous density variations of plasma, probed by O VII and Ne IX triplets. These results strongly indicate that all the inspected He-like triplets are produced by high-density plasma heated in accretion shocks, and located at the base of accretion flows.

PhysicsSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Solar and Stellar AstrophysicsAstronomyAstronomy and AstrophysicsAstrophysicsAccretion Stars: pre-main sequence X-rays: starsAstrophysics::Galaxy AstrophysicsAccretion (astrophysics)Proceedings of the International Astronomical Union
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