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Galaxy Zoo: dust and molecular gas in early-type galaxies with prominent dust lanes

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 423:1 (2012) 49-58

Authors:

Sugata Kaviraj, Yuan-Sen Ting, Martin Bureau, Stanislav S Shabala, R Mark Crockett, Joseph Silk, Chris Lintott, Arfon Smith, William C Keel, Karen L Masters, Kevin Schawinski, Steven P Bamford

Observational Tracking of the 2D Structure of Coronal Mass Ejections Between the Sun and 1 AU

Solar Physics (2012) 1-19

Authors:

NP Savani, JA Davies, CJ Davis, D Shiota, AP Rouillard, MJ Owens, K Kusano, V Bothmer, SP Bamford, CJ Lintott, A Smith

Observational Tracking of the 2D Structure of Coronal Mass Ejections Between the Sun and 1 AU

SOLAR PHYSICS 279:2 (2012) 517-535

Authors:

NP Savani, JA Davies, CJ Davis, D Shiota, AP Rouillard, MJ Owens, K Kusano, V Bothmer, SP Bamford, CJ Lintott, A Smith

The Spitzer Extragalactic Representative Volume Survey (SERVS): Survey Definition and Goals (vol 124, pg 714, 2012)

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 124:920 (2012) 1135-1136

Authors:

J-C Mauduit, M Lacy, D Farrah, JA Surace, M Jarvis, S Oliver, C Maraston, M Vaccari, L Marchetti, G Zeimann, EA Gonzales-Solares, J Pforr, AO Petric, B Henriques, PA Thomas, J Afonso, A Rettura, G Wilson, JT Falder, JE Geach, M Huynh, RP Norris, N Seymour, GT Richards, SA Stanford, DM Alexander, RH Becker, PN Best, L Bizzocchi, D Bonfield, N Castro, A Cava, S Chapman, N Christopher, DL Clements, G Covone, N Dubois, JS Dunlop, E Dyke, A Edge, HC Ferguson, S Foucaud, A Franceschini, RR Gal, JK Grant, M Grossi, E Hatziminaoglou, S Hickey, JA Hodge, J-S Huang, RJ Ivison, M Kim, O LeFevre, M Lehnert, CJ Lonsdale, LM Lubin, RJ McLure, H Messias, A Martinez-Sansigre, AMJ Mortier, DM Nielsen, M Ouchi, G Parish, I Perez-Fournon, M Pierre, S Rawlings, A Readhead, SE Ridgway, D Rigopoulou, AK Romer, IG Rosebloom, HJA Rottgering, M Rowan-Robinson, A Sajina, CJ Simpson, I Smail, GK Squires, JA Stevens, R Taylor, M Trichas, T Urrutia, E van Kampen, A Verma, CK Xu

Spheroidal post-mergers in the local Universe

ArXiv 1111.5008 (2011)

Authors:

Alfredo Carpineti, Sugata Kaviraj, Daniel Darg, Chris Lintott, Kevin Schawinski, Stanislav Shabala

Abstract:

Galaxy merging is a fundamental aspect of the standard hierarchical galaxy formation paradigm. Recently, the Galaxy Zoo project has compiled a large, homogeneous catalogue of 3373 mergers, through direct visual inspection of the entire SDSS spectro- scopic sample. We explore a subset of galaxies from this catalogue that are spheroidal 'post-mergers' (SPMs) - where a single remnant is in the final stages of relaxation after the merger and shows evidence for a dominant bulge, making them plausible progenitors of early-type galaxies. Our results indicate that the SPMs have bluer colours than the general early-type galaxy population possibly due to merger-induced star formation. An analysis using optical emission line ratios indicates that 20 of our SPMs exhibit LINER or Seyfert-like activity (68%), while the remaining 10 galaxies are classified as either star forming (16%) or quiescent (16%). A comparison to the emission line activity in the ongoing mergers from Darg et al. indicates that the AGN fraction rises in the post-mergers, suggesting that the AGN phase probably becomes dominant only in the very final stages of the merger process. The optical colours of the SPMs and the plausible mass ratios for their progenitors indicate that, while a minority are consistent with major mergers between two early-type galaxies, the vast majority are remnants of major mergers where at least one progenitor is a late-type galaxy.