Here I have collected a few X-ray images, most of them made from ROSAT
observations, which I have
used to study the X-ray emission from young stars.
Some of these are simple count rate images, where the pixel intensity is given by the number of photons detected in this pixel. Some, which are labeled as `true colour' images, consist of three overlaid images showing different photon energies.
Photons with energies < 0.5 keV are shown in red,
photons with energies > 0.5 Kev and < 1.0 keV in green,
and those with energies > 1 keV in blue.
The different colours of the stars correspond to different coronal temperatures.
The "Coronet" protostellar nursery
The NGC 1333 star forming region
The Serpens dark cloud
The young stellar cluster IC348
The Scorpius Centaurus OB Association
The Orion nebula cluster
The Rho Ophiuchus star forming region
The Chameleon star forming region
The young stellar cluster IC2391
The young stellar cluster NGC2516
More information about the ROSAT project can be found on the
ROSAT pages at
or at HEASARC , where one can also find additional images.