Spectra of shell ellipticals - Redshifts, velocity dispersions and evidence for recent nuclear star formation

Details Spectra of shell ellipticals - Redshifts, velocity dispersions and evidence for recent nuclear star formation Spectra of shell ellipticals - Redshifts, velocity dispersions and evidence for recent nuclear star formation

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235..813c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Dec. 1, 1988, p. 813-825.

Astronomy and Astrophysics

Astronomy

53

Astronomical Spectroscopy, Elliptical Galaxies, Galactic Evolution, Red Shift, Star Formation Rate, A Stars, Active Galactic Nuclei, Data Reduction, Interacting Galaxies, Sky Surveys (Astronomy)

Scientific paper

Nuclear spectra have been obtained for 100 of the 137 galaxies in the Malin & Carter (1983) catalogue. Redshifts are presented for all, andvelocity dispersions for most of these systems. Many of these galaxies have spectra atypical of elliptical or lenticular galaxies. A-type stars, suggestive of recent star formation in the galactic nucleus, are probably required in 15 to 20 per cent, and 25 per cent have emission lines. About 10 per cent have colours, absolute magnitudes and spectra similar to the post-starburst galaxies in high redshift clusters. Assuming bursts of star formation have been triggered in the shell galaxies by merger events which also created the shells, the authors hypothesize that the more distant post-starburst galaxies may have also undergone merger or accretion events.

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