An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 2 Search : intergalactic medium
intergalactic medium
  مدیم ِ اندرکهکشانی   
madim-e andarkahkešâni

Fr.: milieu intergalactique   

The matter or environment between the galaxies of a → cluster.

→ intergalactic; → medium.

warm-hot intergalactic medium
  مدیم ِ اندر-کهکشانی ِ گرم-داغ   
madim-e andar-kahkašâni garm-dâq

Fr.: milieu intergalactique chaud   

The space containing a cluster of galaxies filled with a tenuous gas of temperature 105 to 107 K and density 10-6 to 10-4 cm-3. WHIM has been continuously shock-heated during the process of structure formation. It is so highly ionized that it can only absorb or emit far-ultraviolet and soft X-ray photons, primarily at spectral lines of highly ionized C, O, Ne, and Fe. WHIM is thought to be the main reservoir of missing baryons.

→ warm; → hot; → intergalactic medium.