Batoidei, or Rays
نویسندگان
چکیده
منابع مشابه
Cooling Flows or Warming Rays?
The radiative cooling time of the X-ray-emitting plasma near the center in many clusters of galaxies is shorter than the age of the cluster, but neither the expected large drop in central temperature –nor the expected mass flow towards the pressure-depleted cluster centers– are observed. We propose a solution to these “cooling flow” problems wherein energy is supplied to the plasma by hadronic ...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1880
ISSN: 0036-8733
DOI: 10.1038/scientificamerican10231880-264