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The Astrophysical Journal, 626:L53L56, 2005 June 10 2005. The American Astronomical Society. All rights reserved. Printed in U.S.A.
 

Summary: L53
The Astrophysical Journal, 626:L53­L56, 2005 June 10
2005. The American Astronomical Society. All rights reserved. Printed in U.S.A.
EVIDENCE FOR AN X-RAY JET IN DG TAURI A?
M. Gu¨del,1
S. L. Skinner,2
K. R. Briggs,1
M. Audard,3
K. Arzner,1
and A. Telleschi1
Received 2005 March 22; accepted 2005 May 9; published 2005 May 23
ABSTRACT
We present evidence for an X-ray jet in the T Tauri star DG Tau A based on Chandra ACIS data. DG Tau A,
a jet-driving classical T Tauri star with a flat infrared spectrum, reveals an unusual X-ray spectrum that requires
two thermal components with different intervening absorption column densities. The softer component shows a
low temperature of T 2.9 MK, and its absorption is compatible with the stellar optical extinction (hydrogen
column density NH 5 #1021
cm 2
). In contrast, the harder component reveals a temperature (22 MK) char-
acteristic of active T Tauri stars, but its emission is more strongly absorbed (NH 2.8 #1022

  

Source: Audard, Marc - INTEGRAL Science Data Centre & Observatory of Geneva, Université de Genève

 

Collections: Physics