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3D Spectroscopy of Emission Nebulae
2009Emission nebulae like H II regions, Planetary Nebulae, Novae, Herbig Haro objects etc. are found as extended objects in the Milky Way, but also as point sources in other galaxies, where they are sometimes observable out to very large distances due to the high contrast provided by some prominent emission lines.
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CO Emission from Planetary Nebulae
1985Searches for molecular line emission from planetary nebulae generally prove negative. Observations of 10 planetaries have resulted in the detection of one of them, NGC2346. In addition, weak CO emission has been detected in Ml-92, which may be a transition object between a red giant and a planetary nebula.
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August: Planetary and Emission Nebulae
2009The brilliant teal glow in the center of the Cat’s Eye Nebula impresses visual astronomers with large telescopes. This central bright region, 20 arcsec in diameter, is just a small portion of the much larger (386 arcsec) outer halo that is a 1,000-fold dimmer, and only appears in long-exposure images such as this one.
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Diffuse Einstein X-ray emission from the region of RCW 49, a bright southern emission nebula
, 1987A. Goldwurm, P. Caraveo, G. Bignami
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The Planetary Nebula A 79 Revisited: Discovery of a Large Emission Nebula
, 2002Hua Chon-Trung, J. Martinis
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