Now showing items 1-20 of 40

    • The abundance of ultra-diffuse galaxies from groups to clusters : UDGs are relatively more common in more massive haloes 

      Burg, Remco F. J. van der; Hoekstra, Henk; Muzzin, Adam; Sifon, Cristobal; Viola, Massimo; Bremer, Malcolm N.; Brough, Sarah; Driver, Simon P.; Erben, Thomas; Heymans, Catherine; Hildebrandt, Hendrik; Holwerda, Benne W.; Klaes, Dominik; Kuijken, Konrad; McGee, Sean; Nakajima, Reiko; Napolitano, Nicola; Norberg, Peder; Taylor, Edward N.; Valentijn, Edwin (2017-11) - Journal article
      In recent years, many studies have reported substantial populations of large galaxies with low surface brightness in local galaxy clusters. Various theories that aim to explain the presence of such ultra-diffuse galaxies ...
    • The Atlas3D project - XXIV. The intrinsic shape distribution of early-type galaxies 

      Weijmans, Anne-Marie; de Zeeuw, P. T.; Emsellem, Eric; Krajnovic, Davor; Lablanche, Pierre-Yves; Alatalo, Katherine; Blitz, Leo; Bois, Maxime; Bournaud, Frederic; Bureau, Martin; Cappellari, Michele; Crocker, Alison; Davies, Roger; Davis, Timothy; Duc, Pierre-Alain; Khochfar, Sadegh; Kuntschner, Harald; McDermid, Richard; Morganti, Raffaella; Naab, Thorsten; Oosterloo, Tom; Sarzi, Marc; Scott, Nicholas; Serra, Paolo; Verdoes Kleijn, Gijs; Young, Lisa (2014-11-11) - Journal article
      We use the Atlas3D sample to perform a study of the intrinsic shapes of early-type galaxies, taking advantage of the available combined photometric and kinematic data. Based on our ellipticity measurements from the Sloan ...
    • The ATLAS3D project - XXVII. Cold gas and the colours and ages of early-type galaxies 

      Young, L. M.; Scott, N.; Serra, P.; Alatalo, K.; Bayet, E.; Blitz, L.; Bois, M.; Bournaud, F.; Bureau, M.; Crocker, A. F.; Cappellari, M.; Davies, R. L.; Davis, T. A.; de Zeeuw, P. T.; Duc, P.-A.; Emsellem, E.; Khochfar, S.; Krajnovic, D.; Kuntschner, H.; McDermid, R. M.; Morganti, R.; Naab, T.; Oosterloo, T.; Sarzi, M.; Weijmans, A.-M. (2014-11-11) - Journal article
      We present a study of the cold gas contents of the Atlas3D early-type galaxies, in the context of their optical colours, near-UV colours, and Hβ absorption line strengths. Early-type (elliptical and lenticular) galaxies ...
    • Bar pattern speeds in CALIFA galaxies : I. Fast bars across the Hubble sequence 

      Aguerri, J.A.L.; Mendez Abreu, Jairo; Falcón-Barroso, J.; Amorin, A.; Barrera-Ballesteros, J.; Cid Fernandes, R.; García-Benito, R.; García-Lorenzo, B.; González Delgado, R.M.; Husemann, B.; Kalinova, V.; Lyubenova, M.; Marino, R.A.; Márquez, I.; Mast, D.; Pérez, E.; Sánchez, S.F.; Van De Ven, G.; Walcher, C.J.; Backsmann, N.; Cortijo-Ferrero, C.; Bland-Hawthorn, J.; Del Olmo, A.; Iglesias-Páramo, J.; Pérez, I.; Sánchez-Blázquez, P.; Wisotzki, L.; Ziegler, B. (2015-04-09) - Journal article
      Context. The bar pattern speed (Ωb) is defined as the rotational frequency of the bar, and it determines the bar dynamics. Several methods have been proposed for measuring Ωb. The non-parametric method proposed by Tremaine ...
    • Bayesian bulge-disc decomposition of galaxy images 

      Argyle, J. J.; Méndez-Abreu, J.; Wild, V.; Mortlock, D. J. (2018-09-21) - Journal article
      We introduce PHI, a fully Bayesian Markov chain Monte Carlo algorithm designed for the structural decomposition of galaxy images. PHI uses a triple layer approach to effectively and efficiently explore the complex parameter ...
    • Fast and slow paths to quiescence : ages and sizes of 400 quiescent galaxies from the LEGA-C survey 

      Wu, Po-Feng; van der Wel, Arjen; Bezanson, Rachel; Gallazzi, Anna; Pacifici, Camilla; Straatman, Caroline M. S.; Barišić, Ivana; Bell, Eric F.; Chauke, Priscilla; van Houdt, Josha; Franx, Marijn; Muzzin, Adam; Sobral, David; Wild, Vivienne (2018-11-19) - Journal article
      We analyze stellar age indicators (Dn4000 and EW(Hδ)) and sizes of 467 quiescent galaxies with M∗≥1010M⊙ at z∼0.7 drawn from DR2 of the LEGA-C survey. Interpreting index variations in terms of equivalent single stellar ...
    • From starburst to quiescence : testing AGN feedback in rapidly Quenching post-starburst galaxies 

      Yesuf, Hassen M.; Faber, S.M.; Trump, Jonathan R.; Koo, David C.; Fang, Jerome J.; Liu, F.S.; Wild, Vivienne; Hayward, Christopher C. (2014-07-14) - Journal article
      Post-starbursts are galaxies in transition from the blue cloud to the red sequence. Although they are rare today, integrated over time they may be an important pathway to the red sequence. This work uses SDSS, GALEX, and ...
    • Galaxy And Mass Assembly (GAMA) : blue spheroids within 87 Mpc 

      Mahajan, Smriti; Drinkwater, Michael J.; Driver, S.; Hopkins, A. M.; Graham, Alister W.; Brough, S.; Brown, Michael J. I.; Holwerda, B. W.; Owers, Matt S.; Pimbblet, Kevin A. (2018-03-21) - Journal article
      In this paper we test if nearby blue spheroid (BSph) galaxies may become the progenitors of star-forming spiral galaxies or passively-evolving elliptical galaxies. Our sample comprises 428 galaxies of various morphologies ...
    • Galaxy and Mass Assembly (GAMA) : morphological transformation of galaxies across the green valley 

      Bremer, M. N.; Phillipps, S.; Kelvin, L. S.; Propris, R. De; Kennedy, Rebecca; Moffett, Amanda J.; Bamford, S.; Davies, L. J. M.; Driver, S. P.; Häußler, B.; Holwerda, B.; Hopkins, A.; James, P. A.; Liske, J.; Percival, S.; Taylor, E. N. (2018-05-01) - Journal article
      We explore constraints on the joint photometric and morphological evolution of typical low redshift galaxies as they move from the blue cloud through the green valley and on to the red sequence. We select Galaxy And Mass ...
    • Galaxy And Mass Assembly (GAMA) : the dependence of the galaxy luminosity function on environment, redshift and colour 

      McNaught-Roberts, Tamsyn; Norberg, Peder; Baugh, Carlton; Lacey, Cedric; Loveday, J.; Peacock, J.; Baldry, I.; Bland-Hawthorn, J.; Brough, S.; Driver, Simon P.; Robotham, A. S. G.; Vazquez-Mata, J. A. (2014-12-01) - Journal article
      We use 80 922 galaxies in the Galaxy And Mass Assembly (GAMA) survey to measure the galaxy luminosity function (LF) in different environments over the redshift range 0.04 <z <0.26. The depth and size of GAMA allows us to ...
    • Galaxy And Mass Assembly (GAMA) : the unimodal nature of the dwarf galaxy population 

      Mahajan, Smriti; Drinkwater, Michael J.; Driver, S.; Kelvin, Lee S.; Hopkins, A. M.; Baldry, I.; Phillipps, S.; Bland-Hawthorn, J.; Brough, S.; Loveday, J.; Penny, Samantha J.; Robotham, A. S. G. (2015-01-21) - Journal article
      In this paper we aim to (i) test the number of statistically distinct classes required to classify the local galaxy population and (ii) identify the differences in the physical and star formation properties of visually ...
    • Galaxy And Mass Assembly (GAMA) : the wavelength-dependent sizes and profiles of galaxies revealed by MegaMorph 

      Vulcani, Benedetta; Bamford, Steven P.; Haeussler, Boris; Vika, Marina; Rojas, Alex; Agius, Nicola K.; Baldry, Ivan; Bauer, Amanda E.; Brown, Michael J. I.; Driver, Simon; Graham, Alister W.; Kelvin, Lee S.; Liske, Jochen; Loveday, Jon; Popescu, Cristina C.; Robotham, Aaron S. G.; Tuffs, Richard J. (2014-06) - Journal article
      We investigate the relationship between colour and structure within galaxies using a large, volume-limited sample of bright, low-redshift galaxies with optical-near-infrared imaging from the Galaxy And Mass Assembly survey. ...
    • Galaxy And Mass Assembly (GAMA) : understanding the wavelength dependence of galaxy structure with bulge-disc decompositions 

      Kennedy, Rebecca; Bamford, Steven P.; Häußler, Boris; Baldry, Ivan; Bremer, Malcolm; Brough, Sarah; Brown, Michael J. I.; Driver, Simon; Duncan, Kenneth; Graham, Alister W.; Holwerda, Benne W.; Hopkins, Andrew M.; Kelvin, Lee S.; Lange, Rebecca; Phillipps, Steven; Vika, Marina; Vulcani, Benedetta (2016-08-21) - Journal article
      With a large sample of bright, low-redshift galaxies with optical-near-IR imaging from the GAMA survey we use bulge-disc decompositions to understand the wavelength-dependent behaviour of single-Sérsic structural measurements. ...
    • Galaxy and Mass Assembly (GAMA) : variation in galaxy structure across the green valley 

      Kelvin, Lee S.; Bremer, Malcolm N.; Phillipps, Steven; James, Philip A.; Davies, Luke J. M.; Propris, Roberto De; Moffett, Amanda J.; Percival, Susan M.; Baldry, Ivan K.; Collins, Chris A.; Alpaslan, Mehmet; Bland-Hawthorn, Joss; Brough, Sarah; Cluver, Michelle; Driver, Simon P.; Hashemizadeh, Abdolhosein; Holwerda, Benne W.; Laine, Jarkko; Lara-Lopez, Maritza A.; Liske, Jochen; Maciejewski, Witold; Napolitano, Nicola R.; Penny, Samantha J.; Popescu, Cristina C.; Sansom, Anne E.; Sutherland, Will; Taylor, Edward N.; Kampen, Eelco van; Wang, Lingyu (2018-07) - Journal article
      Using a sample of 472 local Universe (z < 0.06) galaxies in the stellar mass range 10. 25 < log M*/Mʘ < 10.75, we explore the variation in galaxy structure as a function of morphology and galaxy colour. Our sample of ...
    • Galaxy And Mass Assembly : automatic morphological classification of galaxies using statistical learning 

      Sreejith, Sreevarsha; Pereverzyev Jr, Sergiy; Kelvin, Lee S; Marleau, Francine R; Haltmeier, Markus; Ebner, Judith; Bland-Hawthorn, Joss; Driver, Simon P; Graham, Alister W; Holwerda, Benne W; Hopkins, Andrew M; Liske, Jochen; Loveday, Jon; Moffett, Amanda J; Pimbblet, Kevin A; Taylor, Edward N; Wang, Lingyu; Wright, Angus H (2018-03) - Journal article
      We apply four statistical learning methods to a sample of 7941 galaxies (z < 0.06) from the Galaxy And Mass Assembly survey to test the feasibility of using automated algorithms to classify galaxies. Using 10 features ...
    • The host galaxies of X-ray selected active galactic nuclei to z = 2.5 : structure, star formation, and their relationships from CANDELS and Herschel/PACS 

      Rosario, D.J.; McIntosh, D.H.; Van Der Wel, A.; Kartaltepe, J.; Lang, P.; Santini, P.; Wuyts, S.; Lutz, D.; Rafelski, M.; Villforth, C.; Alexander, D.M.; Bauer, F.E.; Bell, E.F.; Berta, S.; Brandt, W.N.; Conselice, C.J.; Dekel, A.; Faber, S.M.; Ferguson, H.C.; Genzel, R.; Grogin, N.A.; Kocevski, D.D.; Koekemoer, A.M.; Koo, D.C.; Lotz, J.M.; Magnelli, B.; Maiolino, R.; Mozena, M.; Mullaney, J.R.; Papovich, C.J.; Popesso, P.; Tacconi, L.J.; Trump, J.R.; Avadhuta, S.; Bassett, R.; Bell, A.; Bernyk, M.; Bournaud, F.; Cassata, P.; Cheung, E.; Croton, D.; Donley, J.; Degroot, L.; Guedes, J.; Hathi, N.; Herrington, J.; Hilton, M.; Lai, K.; Lani, C.; Martig, M.; McGrath, E.; Mutch, S.; Mortlock, A.; McPartland, C.; O'Leary, E.; Peth, M.; Pillepich, A.; Poole, G.; Snyder, D.; Straughn, A.; Telford, O.; Tonini, C.; Wandro, P. (2015-01) - Journal article
      We study the relationship between the structure and star formation rate (SFR) of X-ray selected low and moderate luminosity active galactic nuclei (AGNs) in the two Chandra Deep Fields, using Hubble Space Telescope imaging ...
    • The incidence of bar-like kinematic flows in CALIFA galaxies 

      Holmes, L.; Spekkens, K.; Sánchez, S.F.; Walcher, C.J.; García-Benito, R.; Mast, D.; Cortijo-Ferrero, C.; Kalinova, V.; Marino, R.A.; Mendez Abreu, Jairo; Barrera-Ballesteros, J.K. (2015-08-21) - Journal article
      We carry out a direct search for bar-like non-circular flows in intermediate-inclination, gasrich disc galaxies with a range of morphological types and photometric bar classifications from the first data release (DR1) of ...
    • Integral-field kinematics and stellar populations of early-type galaxies out to three half-light radii 

      Boardman, Nicholas F.; Weijmans, Anne-Marie; van den Bosch, Remco; Kuntschner, Harald; Emsellem, Eric; Cappellari, Michele; de Zeeuw, Tim; Falcón-Barroso, Jesus; Krajnovic, Davor; McDermid, Richard; Naab, Thorsten; van de Ven, Glenn; Yildirim, Akin (2017-11-11) - Journal article
      We observed twelve nearby HI -detected early-type galaxies (ETGs) of stellar mass ∼ 1010 M⊙ ≤ M* ≤1011 M⊙ with the Mitchell Integral-Field Spectrograph, reaching approximately three half-light radii in most cases. We ...
    • The low dark matter content of the lenticular galaxy NGC 3998 

      Boardman, N. F.; Weijmans, A.; Bosch, R. C. E. van den; Zhu, L.; Yildirim, A.; Ven, G. van de; Cappellari, M.; Zeeuw, P. T. de; Emsellem, E.; Krajnović, D.; Naab, T. (2016-08-11) - Journal article
      We observed the lenticular galaxy NGC 3998 with the Mitchell Integral-Field Spectrograph and extracted line-of-sight velocity distributions out to three half-light radii. We constructed collisionless orbit models in order ...
    • Massive post-starburst galaxies at z > 1 are compact proto-spheroids 

      Almaini, Omar; Wild, Vivienne; Maltby, David T.; Hartley, William G.; Simpson, Chris; Hatch, Nina A.; McLure, Ross J.; Dunlop, James S.; Rowlands, Kate (2017-12-01) - Journal article
      We investigate the relationship between the quenching of star formation and the structural transformation of massive galaxies, using a large sample of photometrically-selected post-starburst galaxies in the UKIDSS UDS ...