V4046 Sgr: X-rays from accretion shock

Autor(en)

Costanza Argiroffi, Antonio Maggio, Thierry Montmerle, Manuel Güdel

Abstrakt

We 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.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

INAF Osservatorio Astronomico di Palermo, Université Paris VI - Pierre-et-Marie-Curie

Seiten

46 - 47

Anzahl der Seiten

2

DOI

https://doi.org/10.1017/S1743921314001690

Publikationsdatum

08-2014

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/v4046-sgr-xrays-from-accretion-shock(eebc3f9d-5ebf-459e-8a69-cb74daa387f8).html