Albert Zijlstra
Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK. (a.zijlstra@manchester.ac.uk).
Received May 20 2015.
Accepted June 24 2015.
]]> RESUMEN
En 2014 se celebró un doble aniversario en el campo de las nebulosas planetarias, 250 años desde su descubrimiento y 150 años desde su correcta identificación espectroscópica. En este artículo reseñamos la investigación sobre nebulosas planetarias publicada durante 2014. Se incluyen relevamientos, estrellas centrales, abundancias químicas, morfologías, campos magnéticos, poblaciones estelares y dinámica galáctica. Ha continuado la importante controversia sobre las abundancias derivadas a partir de líneas de recombinación y líneas prohibidas. Nueva es la controversia sobre la relación entre estrellas simbióticas y estrellas [WC]. La nebulosa planetaria del año es, sin duda, CRL 618, de la cual se publicaron estudios acerca de su núcleo simbiótico binario o [WC], su rápida evolución estelar, sus chorros en expansión y su campo magnético.
ABSTRACT
Planetary nebulae had a double anniversary in 2014, 250 years since their discovery and 150 years since the correct spectroscopic identification. This paper gives an overview of planetary nebula research published in 2014. Topics include surveys, central stars, abundances, morphologies, magnetic fields, stellar population and galactic dynamics. An important continuing controversy is the discrepancy between recombination-line and forbidden-line abundances. A new controversy is the relation between symbiotic stars and [WC] stars. PN of the year is undoubtedly CRL 618, with papers on its binary symbiotic/[WC] nucleus, rapid stellar evolution, expanding jets and magnetic fields.
Key Words: galaxies: stellar content — ISM: abundances — ISM: jets and outflows — planetary nebulae: general — stars: AGB and post-AGB — stars: white dwarfs.
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