An estimate of the time variation of the abundance gradient from planetary nebulae

Publisher: Edp Sciences

E-ISSN: 1432-0746|453|2|587-593

ISSN: 0004-6361

Source: Astronomy & Astrophysics, Vol.453, Iss.2, 2006-07, pp. : 587-593

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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