Super-strong X-ray emission from a deeply embedded
young stellar object in the Serpens cloud core
Astronomy & Astrophysics, 338, L25 (1998)
We report the ROSAT detection of strong X-ray emission from an
invisible infrared source in the Serpens star forming region.
The X-ray source can be identified with the
infrared star EC 95, a deeply embedded
(A_V ~ 34 mag) young stellar object.
The quiescent soft X-ray luminosity of this object is about
(6 - 18) x 10^32 erg/sec,
making it the most X-ray luminous
young stellar object ever detected.
Since this exceeds the quiescent, i.e. non-flaring,
X-ray luminosity of any known
coronal X-ray source by at least about one order of magnitude, our
suggests that a non-solar-like origin for the X-ray emission
of EC 95 has to be considered.
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