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Mining the Herschel-ATLAS: submillimeter-selected blazars in equatorial fields

ArXiv e-prints (2012)

Authors:

M López-Caniego, J González-Nuevo, M Massardi, L Bonavera, D Herranz, M Negrello, G De Zotti, FJ Carrera, L Danese, S Fleuren, M Hardcastle, MJ Jarvis, H-R Klöckner, T Mauch, P Procopio, S Righini, W Sutherland, R Auld, M Baes, S Buttiglione, CJR Clark, A Cooray, A Dariush, L Dunne, S Dye, S Eales, R Hopwood, C Hoyos, E Ibar, RJ Ivison, S Maddox, E Valiante
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The Infrared Properties of Sources Matched in the WISE All-sky and Herschel ATLAS Surveys

\apjl 750 (2012) L18-L18

Authors:

NA Bond, DJ Benford, JP Gardner, A Amblard, S Fleuren, AW Blain, L Dunne, DJB Smith, SJ Maddox, C Hoyos, M Baes, D Bonfield, N Bourne, C Bridge, S Buttiglione, A Cava, D Clements, A Cooray, A Dariush, G de Zotti, S Driver, S Dye, S Eales, P Eisenhardt, R Hopwood, E Ibar, RJ Ivison, MJ Jarvis, L Kelvin, ASG Robotham, P Temi, M Thompson, C-W Tsai, P van der Werf, EL Wright, J Wu, L Yan
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The sizes, masses and specific star-formation rates of massive galaxies at 1.3\ltz\lt1.5: strong evidence in favour of evolution via minor mergers

ArXiv e-prints (2012)

Authors:

RJ McLure, HJ Pearce, JS Dunlop, M Cirasuolo, E Curtis-Lake, VA Bruce, K Caputi, O Almaini, DG Bonfield, EJ Bradshaw, F Buitrago, R Chuter, S Foucaud, WG Hartley, MJ Jarvis
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Search for excited leptons in proton-proton collisions at √s=7TeV with the ATLAS detector

Physical Review D - Particles, Fields, Gravitation and Cosmology 85:7 (2012)

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, OS Abouzeid, H Abramowicz, H Abreu, E Acerbi, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Akesson, G Akimoto, AV Akimov, A Akiyama, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, BMM Allbrooke, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, B Alvarez Gonzalez, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, A Angerami, F Anghinolfi, A Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, S Arfaoui, JF Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez

Abstract:

The ATLAS detector is used to search for excited leptons in the electromagnetic radiative decay channel *→γ. Results are presented based on the analysis of pp collisions at a center-of-mass energy of 7 TeV corresponding to an integrated luminosity of 2.05fb-1. No evidence for excited leptons is found, and limits are set on the compositeness scale Λ as a function of the excited lepton mass m *. In the special case where Λ=m *, excited electron and muon masses below 1.87 TeV and 1.75 TeV are excluded at 95% C.L., respectively. © 2012 CERN.
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Systematic variation of the stellar initial mass function in early-type galaxies.

Nature 484:7395 (2012) 485-488

Authors:

Michele Cappellari, Richard M McDermid, Katherine Alatalo, Leo Blitz, Maxime Bois, Frédéric Bournaud, M Bureau, Alison F Crocker, Roger L Davies, Timothy A Davis, PT de Zeeuw, Pierre-Alain Duc, Eric Emsellem, Sadegh Khochfar, Davor Krajnović, Harald Kuntschner, Pierre-Yves Lablanche, Raffaella Morganti, Thorsten Naab, Tom Oosterloo, Marc Sarzi, Nicholas Scott, Paolo Serra, Anne-Marie Weijmans, Lisa M Young

Abstract:

Much of our knowledge of galaxies comes from analysing the radiation emitted by their stars, which depends on the present number of each type of star in the galaxy. The present number depends on the stellar initial mass function (IMF), which describes the distribution of stellar masses when the population formed, and knowledge of it is critical to almost every aspect of galaxy evolution. More than 50 years after the first IMF determination, no consensus has emerged on whether it is universal among different types of galaxies. Previous studies indicated that the IMF and the dark matter fraction in galaxy centres cannot both be universal, but they could not convincingly discriminate between the two possibilities. Only recently were indications found that massive elliptical galaxies may not have the same IMF as the Milky Way. Here we report a study of the two-dimensional stellar kinematics for the large representative ATLAS(3D) sample of nearby early-type galaxies spanning two orders of magnitude in stellar mass, using detailed dynamical models. We find a strong systematic variation in IMF in early-type galaxies as a function of their stellar mass-to-light ratios, producing differences of a factor of up to three in galactic stellar mass. This implies that a galaxy's IMF depends intimately on the galaxy's formation history.
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