Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..145b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, March 1, 1991, p. 145-158. Research supported by S
Astronomy and Astrophysics
Astronomy
28
Absorption Spectra, Galactic Structure, Interstellar Matter, Quasars, Red Shift, Absorption Cross Sections, Astronomical Spectroscopy, Dwarf Galaxies, Interacting Galaxies
Scientific paper
Results are reported from a search for Ca II absorption by the haloes of galaxies of redshift z less than 0.2 in the lines of sight to nine QSOs. Data obtained with the AAT or with the 2.5-m Isaac Newton Telescope at the Observatorio del Roque de los Muchachos during 1986-1988 are combined with previously published data and presented in tables, graphs, and sample spectra. The present observations detect no Ca II absorption, down to 2sigma limits of 38-164 mA in equivalent width, except in the case of 1543 + 489. Analysis of previous observations which found Ca II absorption shows that it is confined to galactic disks or inhomogeneously distributed; i.e, present-day galaxies do not have Ca-absorbing spherical haloes with covering factor 1.
Blades Chris
Bowen David V.
Penston Michael V.
Pettini Max
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