An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian
فرهنگ ریشهشناختی اخترشناسی-اخترفیزیک
gâf-e DB Fr.: lacune DB The observed absence of helium white dwarfs with temperatures between 45,000 and 27,000 K. A possible explanation lies in the chemical evolution of white dwarfs. Four processes can change the structure of a white dwarf: gravitational settling, interstellar medium accretion, mass loss, and subsurface convective mixing. See also: → DB white dwarf; → gap. |
gâf-e DB Fr.: lacune DB The observed absence of helium white dwarfs with temperatures between 45,000 and 27,000 K. A possible explanation lies in the chemical evolution of white dwarfs. Four processes can change the structure of a white dwarf: gravitational settling, interstellar medium accretion, mass loss, and subsurface convective mixing. See also: → DB white dwarf; → gap. |
sefid kutule-ye DB Fr.: naine blanche DB A → white dwarf whose spectrum shows strong He I in the absence of hydrogen or metal lines. |
sefid kutule-ye DB Fr.: naine blanche DB A → white dwarf whose spectrum shows strong He I in the absence of hydrogen or metal lines. |
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