Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-12-04
Astronomy and Astrophysics
Astrophysics
accepted by Science, 23 pg, 7 figs, incl. Supplementary Online Material; this version of the work has been posted by permissio
Scientific paper
10.1126/science.1149926
Most stars form as members of large associations within dense, very cold (10-100 K) molecular clouds. The nearby giant molecular cloud in Orion hosts several thousand stars of ages less than a few million years, many of which are located in or around the famous Orion Nebula, a prominent gas structure illuminated and ionized by a small group of massive stars (the Trapezium). We present X-ray observations obtained with the X-ray Multi-Mirror satellite XMM-Newton revealing that a hot plasma with a temperature of 1.7-2.1 million K pervades the southwest extension of the nebula. The plasma, originating in the strong stellar winds from the Trapezium, flows into the adjacent interstellar medium. This X-ray outflow phenomenon must be widespread throughout our Galaxy.
Audard Marc
Briggs Kevin R.
Guedel Manuel
Montmerle Th.
Rebull Luisa
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