Monochromatic morphologies of Abell planetary nebulae
نویسندگان
چکیده
منابع مشابه
Planetary Nebulae
Planetary nebulae (PNe) can be used to trace intermediate and old stellar populations in galaxies and the intracluster medium out to approximately 20 Mpc. PNe can be easily identified with narrow-band surveys, and their chemical abundances and radial velocities can be measured with multi-slit or multi-fiber spectrographs. We briefly review what has been accomplished to date, and include tables ...
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A spectroscopic analysis of the G-star located at the centre of Abell 35 leads to a surface gravity log g= 3.7±0.5 and an effective temperature T eff = 5300 ± 200 K, which are typical of a G8IV spectral type. We estimate a projected rota-tional velocity of 55 ± 10 km s −1 and deduce a radius 1.5 ≤ R G ≤ 3.5R in agreement with the subgiant luminosity class: the star is rapidly rotating, near the...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1999
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1999107