Aperture-synthesis observations of carbon monoxide in the EGG Nebula

Details Aperture-synthesis observations of carbon monoxide in the EGG Nebula Aperture-synthesis observations of carbon monoxide in the EGG Nebula

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..306h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 1, 1986, p. 306-313. NASA-supported research.

Astronomy and Astrophysics

Astrophysics

31

Carbon Monoxide, Planetary Nebulae, Synthetic Apertures, Image Processing, Interstellar Matter, Molecular Spectra, Radio Interferometers

Scientific paper

The authors have mapped the λ = 2.6 mm emission from CO in the bipolar nebula CRL 2688 (the Egg Nebula) with 7arcsec resolution using the Owens Valley millimeter-wave interferometer. The detected CO emission is confined to a bright core 10arcsec×15arcsec in size; it is centered on and has the same position angle as the optical reflection nebula. There is a velocity gradient of 3 km s-1arcsec-1 along the major axis of the core source. The bright core source has a high excitation temperature of ≡70K. The similarity between the CO and optical images strongly suggests that the bright CO core is spatially coincident with the visible reflecting dust.

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