The density, the cosmic microwave background, and the proton-to-electron mass ratio in a cloud at redshift 0.9

Publisher： Edp Sciences

E-ISSN： 1432-0746|500|2|725-734

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.500, Iss.2, 2009-06, pp. : 725-734

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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