V4046 Sgr: X-rays from accretion shock
- Author(s)
- Costanza Argiroffi, Antonio Maggio, Thierry Montmerle, Manuel Güdel
- Abstract
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(s)
- Department of Astrophysics
- External organisation(s)
- INAF Osservatorio Astronomico di Palermo, Université Paris VI - Pierre-et-Marie-Curie
- Pages
- 46 - 47
- No. of pages
- 2
- DOI
- https://doi.org/10.1017/S1743921314001690
- Publication date
- 08-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/v4046-sgr-xrays-from-accretion-shock(eebc3f9d-5ebf-459e-8a69-cb74daa387f8).html