Molecular Hydrogen Kinematics and Structure in the Ring Nebula

Details Molecular Hydrogen Kinematics and Structure in the Ring Nebula Molecular Hydrogen Kinematics and Structure in the Ring Nebula

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pasp..116.1135h&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 116, Issue 826, pp. 1135-1142.

Astronomy and Astrophysics

Astronomy

5

Ism: Molecules, Ism: Planetary Nebulae: General, Ism: Planetary Nebulae: Individual: Ngc Number: Ngc 6720

Scientific paper

This paper presents the radial velocity structure of the molecular hydrogen distribution in the Ring Nebula (NGC 6720). The structure was derived from the Doppler shift of the H2 v=1-0 S(1) line emission (2.122 μm, Δλ=0.02 μm), obtained using Fabry-Pérot spectroscopy. The kinematic results point to the fact that the molecular hydrogen emission is concentrated in an expanding hollow cylinder containing H2 clumps. In spite of the medium resolution of the observations, the kinematics of the H2 clumps in NGC 6720 are revealed, showing that they are distributed all over the ellipsoidal shell, with a wide range of values for their radial velocities and sizes.
Based on observations made at the Observatorio Astronómico Nacional at San Pedro Mártir, Baja California, México.

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