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The Atlas3D project - XII. Recovery of the mass-to-light ratio of simulated early-type barred galaxies with axisymmetric dynamical models

(2012)

Authors:

Pierre-Yves Lablanche, Michele Cappellari, Eric Emsellem, Frederic Bournaud, Leo Michel-Dansac, Katherine Alatalo, Leo Blitz, Maxime Bois, Martin Bureau, Roger L Davies, Timothy A Davis, PT de Zeeuw, Pierre-Alain Duc, Sadegh Khochfar, Davor Krajnovic, Harald Kuntschner, Raffaella Morganti, Richard M McDermid, Thorsten Naab, Tom Oosterloo, Marc Sarzi, Nicholas Scott, Paolo Serra, Anne-Marie Weijmans, Lisa M Young
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Blind Detections of CO J = 1-0 in 11 H-ATLAS Galaxies at z = 2.1-3.5 with the GBT/Zpectrometer

\apj 752 (2012) 152-152

Authors:

AI Harris, AJ Baker, DT Frayer, I Smail, AM Swinbank, DA Riechers, PP van der Werf, R Auld, M Baes, RS Bussmann, S Buttiglione, A Cava, DL Clements, A Cooray, H Dannerbauer, A Dariush, G De Zotti, L Dunne, S Dye, S Eales, J Fritz, J González-Nuevo, R Hopwood, E Ibar, RJ Ivison, MJ Jarvis, S Maddox, M Negrello, E Rigby, DJB Smith, P Temi, J Wardlow
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The evolutionary connection between QSOs and SMGs: molecular gas in far-infrared luminous QSOs at z 2.5

ArXiv e-prints (2012)

Authors:

JM Simpson, I Smail, AM Swinbank, DM Alexander, R Auld, M Baes, DG Bonfield, DL Clements, A Cooray, KEK Coppin, ALR Danielson, A Dariush, L Dunne, G de Zotti, CM Harrison, R Hopwood, C Hoyos, E Ibar, RJ Ivison, MJ Jarvis, A Lapi, SJ Maddox, MJ Page, DA Riechers, E Valiante, PP van der Werf
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The likelihood ratio as a tool for radio continuum surveys with Square Kilometre Array precursor telescopes

\mnras 423 (2012) 132-140-132-140

Authors:

K McAlpine, DJB Smith, MJ Jarvis, DG Bonfield, S Fleuren
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Data and 2D scaling relations for galaxies in Abell 1689: a hint of size evolution at z~0.2

Monthly Notices of the Royal Astronomical Society Blackwell Publishing Inc. (2012)

Authors:

RCW Houghton, RL Davies, ED Bonta, R Masters

Abstract:

{abridged} We present imaging and spectroscopy of Abell 1689 (z=0.183) from GEMINI/GMOS-N and HST/ACS. We measure integrated photometry from the GMOS g' and r' images (for 531 galaxies) and surface photometry from the HST F625W image (for 43 galaxies) as well as velocities and velocity dispersions from the GMOS spectra (for 71 galaxies). We construct the Kormendy relation (KR), Faber-Jackson relation (FJR) and colour-magnitude relation (CMR) for early-type galaxies in Abell 1689 using this data and compare them to those of the Coma cluster. We measure the intrinsic scatter of the CMR in Abell 1689 to be 0.054 \pm 0.004 mag which places degenerate constraints on the ratio of the assembly timescale to the time available (beta) and the age of the population. Making the assumption that galaxies in Abell 1689 will evolve into those of Coma over an interval of 2.26 Gyr breaks this degeneracy and limits beta to be > 0.6 and the age of the red sequence to be > 5.5 Gyr (formed at z > 0.55). Without corrections for size evolution but accounting for magnitude cuts and selection effects, the KR & FJR are inconsistent and disagree at the 2 sigma level regarding the amount of luminosity evolution in the last 2.26 Gyr. However, after correcting for size evolution the KR & FJR show similar changes in luminosity (0.22 \pm 0.11 mag) that are consistent with the passive evolution of the stellar populations from a single burst of star formation 10.2 \pm 3.3 Gyr ago (z = 1.8+inf-0.9). Thus the changes in the KR, FJR & CMR of Abell 1689 relative to Coma all agree and suggest old galaxy populations with little or no synchronisation in the star formation histories. Furthermore, the weak evidence for size evolution in the cluster environment in the last 2.26 Gyr places interesting constraints on the possible mechanisms at work, favouring harassment or secular processes over merger scenarios.
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