SciELO - Scientific Electronic Library Online

 
vol.47 número1Recalibrated turbulence profiles at San Pedro MártirMass and metal ejection efficiency in disk galaxies driven by young stellar clusters of nuclear starburst índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista mexicana de astronomía y astrofísica

versión impresa ISSN 0185-1101

Resumen

PHILLIPS, J. P.  y  MARQUEZ-LUGO, R. A. Mid- and Far-Infrared Photometry of Galactic Planetary Nebulae with the AKARI All-Sky Survey. Rev. mex. astron. astrofis [online]. 2011, vol.47, n.1, pp. 83-112. ISSN 0185-1101.

We provide mid- and far-infrared photometry of 857 Galactic planetary nebulae (PNe) using data derived from the AKARI All-Sky Survey. These include fluxes at 9 and 18 µm obtained with the Infrared Camera (IRC), and at 65, 90, 140 and 160 µm using the far-Infrared Surveyor (FIS). It is noted that the IR luminosities of the youngest PNe are comparable to the total luminosities of the central stars, and subsequently decline to where D > 0.08 pc. This is consistent with an evolution of PNe dust opacities, and appreciable absorption in young and proto-PNe. We also note that there is little evidence for the evolution in IR/radio flux ratios suggested by previous authors. The fall-off of dust temperatures with increasing nebular diameter is similar to that determined in previous studies, whilst levels of Lyα heating are <0.5 of the total energy budget of the grains. There appears to be an evolution in the infrared excess (IRE) as nebulae expand, with the largest values occurring in the most compact PNe.

Palabras llave : dust; extinction; infrared [ISM]; ISM [jets and outflows]; planetary nebulae [general].

        · resumen en Español     · texto en Inglés     · pdf en Inglés