Kinematics of ionized gas in the center of the Andromeda nebula (M31)

Details Kinematics of ionized gas in the center of the Andromeda nebula (M31) Kinematics of ionized gas in the center of the Andromeda nebula (M31)

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...178...91b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 178, no. 1-2, May 1987, p. 91-94.

Astronomy and Astrophysics

Astrophysics

19

Andromeda Galaxy, Galactic Nuclei, Gas Dynamics, Ionized Gases, Nebulae, Hydrogen Ions, Line Spectra, Nitrogen Ions, Radial Velocity, Supernovae

Scientific paper

A very high contrast monochromatic image and a two-dimensional radial velocity field in the 6584 Å line of ionized nitrogen have been obtained in the central 3arcmin×3arcmin of Messier 31, from the CIGALE experiment, a scanning Fabry-Perot spectrograph. The already known mottled appearance and the presence of 50 - 100 km s-1 chaotic motions are confirmed, and connected to injection of kinetic energy in the interstellar medium via supernova explosions. An overall rotation pattern is found, with lower velocities than expected from the mass distribution: this supports a previous, purely geometrical, suggestion by Jacoby et al. (1985) that most of the gas is rotating in a strongly tipped plane.

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