Browsing by Subject "Galaxies: elliptical and lenticular"
Now showing items 1-6 of 6
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Age-dating luminous red galaxies observed with the Southern African Large Telescope
(Oxford Univ Press, 2017)We measure a value for the cosmic expansion of H(z) = 89 ± 23(stat) ± 44(syst) km s−1 Mpc−1 at a redshift of z ≃ 0.47 based on the differential age technique. This technique, also known as cosmic chronometers, uses the age ... -
The close pair fraction of BCGs since z = 0.5: major mergers dominate recent BCG stellar mass growth
(Oxford Univ Press, 2017)Using the redMaPPer (red-sequence Matched-filter Probabilistic Percolation) cluster catalogue based on the Sloan Digital Sky Survey (SDSS) photometry, we investigate the importance of major mergers in the stellar mass ... -
The detailed nature of active central cluster galaxies
(Oxford Univ Press, 2013)We present detailed integral field unit observations of the central few kiloparsecs of the ionized nebulae surrounding four active central cluster galaxies (CCGs) in cooling flow clusters (Abell 0496, 0780, 1644 and ... -
Diversity in the stellar velocity dispersion profiles of a large sample of brightest cluster galaxies z ≤ 0.3
(Oxford Univ Press, 2018)We analyse spatially resolved deep optical spectroscopy of brightestcluster galaxies (BCGs) located in 32 massive clusters with redshifts of 0.05 ≤ z ≤ 0.30 to investigate their velocity dispersion profiles. We compare ... -
Dynamical masses of brightest cluster galaxies. I. Stellar velocity anisotropy and mass-to-light ratios
(Oxford Univ press, 2020)We investigate the stellar and dynamical mass profiles in the centres of 25 brightest cluster galaxies (BCGs) at redshifts of 0.05 ≤ z ≤ 0.30. Our spectroscopy enables us to robustly measure the Gauss–Hermite higher order ... -
Dynamical modelling of brightest cluster galaxies: constraints on the IMF
(Cambridge Univ Press, 2020)We study the stellar and dynamical masses, as well as the stellar populations, of brightest cluster galaxies (BCGs) located in 32 massive clusters, and for a sub-sample of these use the results to place constraints on the ...