Molecular gas in young planetary nebulae

Details Molecular gas in young planetary nebulae Molecular gas in young planetary nebulae

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.171..195b&link_type=abstract

(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640

Astronomy and Astrophysics

Astrophysics

1

Astronomical Spectroscopy, Carbon Monoxide, Molecular Gases, Planetary Nebulae, Rotational Spectra, Emission Spectra, Formyl Ions, Hydrocyanic Acid, Hydrogen

Scientific paper

High-resolution CO J = 2-1 and J = 1-0 emission from three young planetary nebulae (NGC 2346, M 2-9, and NGC 6720, which is the Ring Nebula in Lyra) was observed by the IRAM 30-m dish at Pico Veleta (near Granada, Spain). The CO J = 2-1 and J = 1-0 lines were observed simultaneously by using two SIS mixers with SSB noise receiver temperatures of 250 K and 180 K. A high-resolution emission map of the Ring Nebula shows that the emission extends over a region of 100 x 80 arcsec, indicating that the molecular mass of this nebula is 0.1 solar mass (i.e., much higher than values estimated before).

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