V4046 Sgr: X-rays from accretion shock

Costanza Argiroffi; null Sacco; Antonio Maggio; null Kastner; null Damiani; null Donati; null Montmerle; null Argiroffi; null Huenemoerder; null Audard; null Güdel; null Hussain; null Bouvier; null Gregory; null Alecian

V4046 Sgr: X-rays from accretion shock

Costanza Argiroffi, Sacco, Antonio Maggio, Kastner, Damiani, Donati, Montmerle, Argiroffi, Huenemoerder, Audard, Güdel, Hussain, Bouvier, Gregory, Alecian

Fisica e Chimica - Emilio Segrè

Research output: Contribution to conference › Other › peer-review

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.

Original language	English
Number of pages	2
Publication status	Published - 2014

All Science Journal Classification (ASJC) codes

Medicine (miscellaneous)
Astronomy and Astrophysics
Nutrition and Dietetics
Public Health, Environmental and Occupational Health
Space and Planetary Science

Cite this

@conference{a9ca6dd1c533437f8514c3496919fc89,

title = "V4046 Sgr: X-rays from accretion shock",

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.",

author = "Costanza Argiroffi and Sacco and Antonio Maggio and Kastner and Damiani and Donati and Montmerle and Argiroffi and Huenemoerder and Audard and G{\"u}del and Hussain and Bouvier and Gregory and Alecian",

year = "2014",

language = "English",

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TY - CONF

T1 - V4046 Sgr: X-rays from accretion shock

AU - Argiroffi, Costanza

AU - Sacco, null

AU - Maggio, Antonio

AU - Kastner, null

AU - Damiani, null

AU - Donati, null

AU - Montmerle, null

AU - Argiroffi, null

AU - Huenemoerder, null

AU - Audard, null

AU - Güdel, null

AU - Hussain, null

AU - Bouvier, null

AU - Gregory, null

AU - Alecian, null

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10447/100545

UR - http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9314682&fileId=S1743921314001690

M3 - Other

ER -

V4046 Sgr: X-rays from accretion shock

Abstract

All Science Journal Classification (ASJC) codes

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