Browsing by Subject "Galaxies: evolution"
Now showing items 1-10 of 12
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Abundance ratios and IMF slopes in the dwarf elliptical galaxy NGC 1396 with MUSE
(Oxford Univ Press, 2016)Deep observations of the dwarf elliptical (dE) galaxy NGC 1396 (MV = −16.60, Mass ∼4 × 108 M⊙), located in the Fornax cluster, have been performed with the Very Large Telescope/Multi Unit Spectroscopic Explorer spectrograph ... -
Abundance ratios in dwarf elliptical galaxies
(Oxford Univ Press, 2018)We determine abundance ratios of 37 dwarf ellipticals (dEs) in the nearby Virgo cluster. This sample is representative of the early-type population of galaxies in the absolute magnitude range −19.0 < Mr < −16.0. We analyse ... -
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 ... -
Carbon-loud SDSS BOSS type II quasars at z > 2: high-density gas or secondary production of carbon?
(Oxford Univ Press, 2020)We study the ultraviolet (UV) emission-line ratios of a sample of 145 type II quasars (QSO2s) from Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey, and compare against a grid of active galactic nucleus ... -
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 ... -
Detection of large-scale Ly α absorbers at large angles to the radio axis of high-redshift radio galaxies using SOAR
(Oxford Univ Press, 2018)We present an investigation of the properties of the extended Ly α halo and the large-scale H I absorbing structures associated with five high-redshift radio galaxies at z > 2, using the Goodman long-slit spectrograph ... -
Did brightest cluster galaxies experience more than one star formation epoch?
(Cambridge University Press, 2012)We use the full spectrum fitting ability of ULySS, with the Pegase.HR stellar population model to fit the observed spectra of 40 brightest cluster galaxies in order to determine whether a single or a composite stellar ... -
Enhanced H I profile asymmetries in close galaxy pairs
(Oxford Univ Press, 2019)Analysing the quantified H I profile asymmetries of galaxies in different environments, we explore not only the prevalence of asymmetry in H I profiles, but also the possibility of using H I profile asymmetries to trace ... -
Gemini observations of galaxies in rich early environments (GOGREEN) I: survey description
(Oxford Univ Press, 2017)We describe a new Large Program in progress on the Gemini North and South telescopes: Gemini Observations of Galaxies in Rich Early Environments (GOGREEN). This is an imaging and deep spectroscopic survey of 21 galaxy ... -
Investigating the star formation histories of the brightest cluster galaxies
(Oxford Univ Press, 2014)This article is devoted to the study of the central stellar populations of the brightest cluster galaxies (BCGs). High signal-to-noise ratio, long-slit spectra for a sample of 39 galaxies were fitted against two stellar ...
