SIMBAD references

2007A&A...465L...5A - Astronomy and Astrophysics, volume 465, L5-8 (2007/4-1)

X-ray emission from MP Muscae: an old classical T Tauri star.

ARGIROFFI C., MAGGIO A. and PERES G.

Abstract (from CDS):

We study the properties of X-ray emitting plasma of MP Mus, an old classical T Tauri star. We check whether an accretion process could produce the observed X-ray emission and we derive the accretion parameters and the characteristics of the shock-heated plasma. We compare the properties of MP Mus with those of younger classical T Tauri stars to test whether age is related to the properties of the X-ray emitting plasma. XMM-Newton X-ray spectra allow us to measure plasma temperatures, abundances, and electron density. The density of cool plasma probes whether X-ray emission is produced by plasma heated in the accretion process. X-ray emission from MP Mus originates from high density cool plasma but a hot flaring component is also present, suggesting that both coronal magnetic activity and accretion contribute to the observed X-ray emission. We find a Ne/O ratio similar to that observed in the much younger classical T Tauri star BP Tau. From the soft part of the X-ray emission, mostly produced by plasma heated in the accretion shock, we derive a mass accretion rate of 5x10–11M/yr.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: circumstellar matter - stars: coronae - stars: individual: MP Muscae - stars: pre-main sequence - X-rays: stars

Simbad objects: 10

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2019.10.23-00:56:40

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