RMxAA

Revista Mexicana de Astronomía y Astrofísica

ISSN: 3061-8649
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Neutral hydrogen and continuum VLA observations of the planetary nebulae NGC 6302 and NGC 2440. (1985). Revista Mexicana De Astronomía Y Astrofísica, 11(1), 109-112. https://astronomia.unam.mx/journals/rmxaa/article/view/1985rmxaa..11..109r

Abstract

Our high angular resolution map of the -40 km s-1 H I absorption feature in NGC 6302 confirms previous results in the sense that the absorbing gas is associated with the planetary nebula. The continuum map of NGC 6302 shows structures that may be associated with the extended (∼ 1') optical lobes. In the case of NGC 2440 both H I absorption features at 0 and 25 km s-1 produce uniform attenuation across the face of the planetary nebula, suggesting that they are being caused by line-of-sight interstellar clouds unrelated to NGC 2440. Our continuum map of this nebula is similar to the Hα isophotal map of Phillips, Reay, and Worswick (1980), supporting the notion that the extinction is uniform over the extent of the nebula.
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