Doubly ionized aluminium - A diagnostic of cooling gas in the galactic corona

Details Doubly ionized aluminium - A diagnostic of cooling gas in the galactic corona Doubly ionized aluminium - A diagnostic of cooling gas in the galactic corona

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203.1183h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, June 1983, p. 1183-1186.

Astronomy and Astrophysics

Astronomy

5

Abundance, Aluminum, Gas Temperature, Interstellar Gas, Ionized Gases, Milky Way Galaxy, Absorption Spectra, Atomic Collisions, Charge Exchange, Coronas, Metal Ions, Plasma Equilibrium, Radial Velocity, Ultraviolet Absorption

Scientific paper

Even though it is thought to be abundant only in a very narrow temperature range, Al2+ has a large column density in the interstellar gas. The authors point out that charge transfer ionization of singly ionized aluminium is probably too slow to broaden the temperture range over which Al2+ is abundant in steady-state ionization equilibrium. Al2+ may exist in gas cooling from temperatures not exceeding about 50000K. If interstellar Al2+ in the halo forms in a galactic fountain, the fountain is unlikely to be thermally driven.

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