Calcium depletion in cooling-flow nebulae and the origin of the line-emitting gas

Details Calcium depletion in cooling-flow nebulae and the origin of the line-emitting gas Calcium depletion in cooling-flow nebulae and the origin of the line-emitting gas

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...414l..17d&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 414, no. 1, p. L17-L20.

Astronomy and Astrophysics

Astrophysics

47

Cooling Flows (Astrophysics), Cosmic Dust, Emission Spectra, Galactic Structure, Nebulae, Abundance, Calcium, Line Spectra, X Ray Astronomy

Scientific paper

We present upper limits on the forbidden Ca II 7291 A flux from emission-line nebulae in cluster cooling flows. The observed lack of forbidden Ca II emission indicates that gas-phase calcium is underabundant in cooling-flow nebulae and is most likely depleted onto dust grains. If calcium in the line-emitting filaments is largely bound into dust, then these filaments probably did not condense out of the hot intracluster gas.

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