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The Galaxy Genome Project 2

The Galaxy Genome Project 2
ARC | Super Science Fellowships
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  • Star formation in shocked cluster spirals and their tails

    Roediger, E.; Brüggen, M.; Owers, M. S.; Ebeling, H.; Sun, M. (2014)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    Recent observations of ram pressure stripped spiral galaxies in clusters revealed details of the stripping process, i.e., the truncation of all interstellar medium (ISM) phases and of star formation (SF) in the disk, and multiphase star-forming tails. Some stripped galaxies, in particular in merging clusters, develop spectacular star-forming tails, giving them a jellyfish-like appearance. In merging clusters, merger shocks in the intra-cluster medium (ICM) are thought to have overrun these ga...

    2MASS Photometric Redshift catalog: a comprehensive three-dimensional census of the whole sky

    Bilicki, Maciej; Jarrett, Thomas H.; Peacock, John A.; Cluver, Michelle E.; Steward, Louise (2013)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    Key cosmological applications require the three-dimensional galaxy distribution on the entire celestial sphere. These include measuring the gravitational pull on the Local Group, estimating the large-scale bulk flow and testing the Copernican principle. However, the largest all-sky redshift surveys -- the 2MRS and IRAS PSCz -- have median redshifts of only z=0.03 and sample the very local Universe. There exist all-sky galaxy catalogs reaching much deeper -- SuperCOSMOS in the optical, 2MASS i...

    Enhanced Warm H_2 Emission in the Compact Group Mid-infrared "Green Valley"

    Cluver, M. E.; Appleton, P. N.; Ogle, P.; Jarrett, T. H.; Rasmussen, J.; Lisenfeld, U.; Guillard, P.; Verdes-Montenegro, L.; Antonucci, R.; Bitsakis, T.; Charmandaris, V.; Boulanger, F.; Egami, E.; Xu, C. K.; Yun, M. S. (2013)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    We present results from a Spitzer mid-infrared spectroscopy study of a sample of 74 galaxies located in 23 Hickson Compact Groups (HCGs), chosen to be at a dynamically active stage of Hi depletion. We find evidence for enhanced warm H-2 emission (i.e., above that associated with UV excitation in star-forming regions) in 14 galaxies (similar to 20%), with 8 galaxies having extreme values of L(H2 S(0)-S(3))/L(7.7 mu m polycyclic aromatic hydrocarbon), in excess of 0.07. Such emission has been s...

    Galaxy And Mass Assembly (GAMA) : witnessing the assembly of the cluster ABELL 1882

    Owers, M. S.; Baldry, I. K.; Bauer, A. E.; Bland-Hawthorn, J.; Brown, M. J. I.; Cluver, M. E.; Colless, M.; Driver, S. P.; Edge, A. C.; Hopkins, A. M.; van Kampen, E.; Lara-Lopez, M. A.; Liske, J.; Loveday, J.; Pimbblet, K. A.;... (2013)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    We present a combined optical and X-ray analysis of the rich cluster ABELL 1882 (A1882) with the aim of identifying merging substructure and understanding the recent assembly history of this system. Our optical data consist of spectra drawn from the Galaxy and Mass Assembly survey, which lends itself to this kind of detailed study thanks to its depth and high spectroscopic completeness. We use 283 spectroscopically confirmed cluster members to detect and characterize substructure. We compleme...

    Extending the Nearby Galaxy Heritage with WISE: First Results from the WISE Enhanced Resolution Galaxy Atlas

    Jarrett, T. H.; Masci, F.; Tsai, C. W.; Petty, S.; Cluver, M.; Assef, Roberto J.; Benford, D.; Blain, A.; Bridge, C.; Donoso, E.; Eisenhardt, P.; Koribalski, B.; Lake, S.; Neill, James D.; Seibert, M.;... (2012)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    The Wide-field Infrared Survey Explorer (WISE) mapped the entire sky at mid-infrared wavelengths 3.4 μm, 4.6 μm, 12 μm, and 22 μm. The mission was primarily designed to extract point sources, leaving resolved and extended sources, for the most part, unexplored. Accordingly, we have begun a dedicated WISE Enhanced Resolution Galaxy Atlas (WERGA) project to fully characterize large, nearby galaxies and produce a legacy image atlas and source catalog. Here we demonstrate the first results of the...

    Photometric studies of Abell 1664: The subtle effect a minor merger has on cluster galaxies

    Kleiner, D.; Pimbblet, K. A.; Owers, M. S.; Jones, D. H.; Stephenson, A. P. (2014)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    A combination of $BRI$ photometry and archival Chandra X-ray data have been used to analyse the effects a minor merger has on the galaxy population of A1664. We utilise adaptive smoothing techniques in the 2D spatial distribution of cluster galaxies to reveal substructure $\sim$ 800 kpc South of the cluster core. We identify this substructure as most likely the remnant core of a merging group which has passed pericentre and responsible for triggering a cold front in the cluster core. We defin...

    Galaxy And Mass Assembly (GAMA): The connection between metals, specific-SFR, and HI gas in galaxies: the Z-SSFR relation

    Lara-López, M. A.; Hopkins, A. M.; López-Sánchez, A. R.; Brough, S.; Bland-Hawthorn, M. Colless J.; Driver, S.; Foster, C.; Liske, J.; Loveday, J.; Robotham, A. S. G.; Sharp, R. G.; Steele, O.; Taylor, E. N. (2013)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    We study the interplay between gas phase metallicity (Z), specific star formation rate (SSFR) and neutral hydrogen gas (HI) for galaxies of different stellar masses. Our study uses spectroscopic data from GAMA and SDSS star forming galaxies, as well as HI-detection from the ALFALFA and GASS public catalogues. We present a model based on the Z-SSFR relation that shows that at a given stellar mass, depending on the amount of gas, galaxies will follow opposite behaviours. Low-mass galaxies with ...

    A Merger Shock in Abell 2034

    Owers, Matt S.; Nulsen, Paul E. J.; Couch, Warrick J.; Ma, Cheng-Jiun; David, Laurence P.; Forman, William R.; Hopkins, Andrew M.; Jones, Christine; van Weeren, Reinout J. (2013)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023)
    We present a $250\,$ks Chandra observation of the cluster merger A2034 with the aim of understanding the nature of a sharp edge previously characterized as a cold front. The new data reveal that the edge is coherent over a larger opening angle and is significantly more bow-shock-shaped than previously thought. Within $\sim 27\,$degrees about the axis of symmetry of the edge the density, temperature and pressure drop abruptly by factors of $1.83^{+0.09}_{-0.08}$, $1.85^{+0.41}_{-0.41}$ and $3....

    Integral Field spectroscopy of two HI rich E+A galaxies

    Pracy, Michael; Owers, Matt; Zwaan, Martin; Couch, Warrick; Kuntschner, Harald; Croom, Scott; Sadler, Elaine (2014)
    Projects: ARC | The Galaxy Genome Project 2 (FS110200023), ARC | Dissecting galaxy evolution (FT100100457)
    Approximately half of the nearby E+A galaxies followed up with 21-cm observations have detectable HI emission. The optical spectra of these galaxies show strong post-starburst stellar populations but no optical emission lines implying star-formation is not ongoing despite the presence of significant gas reservoirs. We have obtained integral field spectroscopic follow up observations of the two brightest, and nearest, of the six E+A galaxies with HI 21-cm emission in the recent sample of Zwaan...

    Galaxy And Mass Assembly (GAMA) : spectroscopic analysis

    Hopkins, A. M.; Driver, S. P.; Brough, S.; Owers, M. S.; Bauer, A. E.; Gunawardhana, M. L. P.; Cluver, M. E.; Colless, M.; Foster, C.; Lara-Lopez, M. A.; Roseboom, I.; Sharp, R.; Steele, O.; Thomas, D.; Baldry, I. K.;... (2013)
    Projects: RCUK | Astrophysics and Cosmology at the University of Sussex (2011-2016) (ST/I000976/1), ARC | The Galaxy Genome Project 2 (FS110200023), ARC | The Galaxy Genome Project 1 (FS100100065), EC | DEGAS (259586)
    The Galaxy And Mass Assembly (GAMA) survey is a multiwavelength photometric and spectroscopic survey, using the AAOmega spectrograph on the Anglo-Australian Telescope to obtain spectra for up to similar to 300 000 galaxies over 280 deg(2), to a limiting magnitude of r(pet) < 19.8 mag. The target galaxies are distributed over 0 < z less than or similar to 0.5 with a median redshift of z approximate to 0.2, although the redshift distribution includes a small number of systems, primarily quasars...
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