Browsing by Title

Now showing items 9147-9166 of 24188

    • Galactic 26Al traces metal loss through hot chimneys 

      Krause, Martin G. H.; Rodgers-Lee, Donna; Dale, James E.; Diehl, Roland; Kobayashi, Chiaki (2021-02-01)
      Radioactive 26Al is an excellent tracer for metal ejection in the Milky Way, and can provide a direct constraint on the modelling of supernova feedback in galaxy evolution. Gamma-ray observations of the 26Al decay line ...

    • GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I : A low-frequency extragalactic catalogue 

      Hurley-Walker, Natasha; Callingham, Joseph R.; Hancock, Paul J.; Franzen, Thomas M. O.; Hindson, Luke; Kapinska, Anna D.; Morgan, John; Offringa, Andre R.; Wayth, Randall B.; Wu, Chen; Zheng, Q.; Murphy, Tara; Bell, Martin E.; Dwarakanath, K. S.; For, Bi-Qing; Gaensler, Bryan M.; Johnston-Hollitt, Melanie; Lenc, Emil; Procopio, Pietro; Staveley-Smith, Lister; Ekers, Ron; Bowman, Judd D.; Briggs, Frank; Cappallo, R. J.; Deshpande, Avinash A.; Greenhill, Lincoln; Hazelton, Brynah J.; Kaplan, David L.; Lonsdale, Colin J.; McWhirter, S. R.; Mitchell, Daniel A.; Morales, Miguel F.; Morgan, Edward; Oberoi, Divya; Ord, Stephen M.; Prabu, T.; Shankar, N. Udaya; Srivani, K. S.; Subrahmanyan, Ravi; Tingay, Steven J.; Webster, Rachel L.; Williams, Andrew; Williams, Christopher L. (2017-01-01)
      Using the Murchison Widefield Array (MWA), the low-frequency Square Kilometre Array (SKA1 LOW) precursor located in Western Australia, we have completed the GaLactic and Extragalactic All-sky MWA (GLEAM) survey, and present ...

    • Galactic chemical evolution : Carbon through zinc 

      Kobayashi, C.; Umeda, Hideyuki; Nomoto, Ken'ichi; Tominaga, Nozomu; Ohkubo, Takuya (2006-12-20)
      We calculate the evolution of heavy-element abundances from C to Zn in the solar neighborhood, adopting our new nucleosynthesis yields. Our yields are calculated for wide ranges of metallicity (Z = 0-Z circle dot) and the ...

    • The Galactic disc distribution of planetary nebulae with warm dust emission features - I 

      Casassus, S.; Roche, P.F.; Aitken, D.; Smith, C.H. (2001)

    • The galactic population of white dwarfs 

      Napiwotzki, R. (2009)
      The contribution of white dwarfs of the different Galactic populations to the stellar content of our Galaxy is only poorly known. Some authors claim a vast population of halo white dwarfs, which would be in accordance with ...

    • Galactic Population Synthesis of Radioactive Nucleosynthesis Ejecta 

      Siegert, Thomas; Pleintinger, Moritz M. M.; Diehl, Roland; Krause, Martin G. H.; Greiner, Jochen; Weinberger, Christoph (2023-03-30)
      Diffuse gamma-ray line emission traces freshly produced radioisotopes in the interstellar gas, providing a unique perspective on the entire Galactic cycle of matter from nucleosynthesis in massive stars to their ejection ...

    • Galactic Simulations of r-process Elemental Abundances 

      Haynes, Christopher; Kobayashi, Chiaki (2019-03-01)
      We present the distributions of elemental abundance ratios using chemodynamical simulations that include four different neutron capture processes: magnetorotational supernovae, neutron star mergers, neutrino-driven winds, ...

    • Galactic synchrotron emissivity measurements between 250° MWA 

      Su, H.; Hurley-Walker, N.; Jackson, C. A.; McClure-Griffiths, N. M.; Tingay, S. J.; Hindson, L.; Hancock, P.; Wayth, R. B.; Gaensler, B. M.; Staveley-Smith, L.; Morgan, J.; Johnston-Hollitt, M.; Lenc, E.; Bell, M. E.; Callingham, J. R.; Dwarkanath, K. S.; For, B. Q.; Kapińska, A. D.; McKinley, B.; Offringa, A. R.; Procopio, P.; Wu, C.; Zheng, Q. (2017-03-01)
      Synchrotron emission pervades the Galactic plane at low radio frequencies, originating from cosmic ray electrons interacting with the Galactic magnetic field. Using a low-frequency radio telescope, the Murchison Widefield ...

    • Galactic wind shells and high redshift radio galaxies. On the nature of associated absorbers 

      Krause, M. (2005-06-03)
      A jet is simulated on the background of a galactic wind headed by a radiative bow shock. The wind shell, which is due to the radiative bow shock, is effectively destroyed by the impact of the jet cocoon, thanks to ...

    • Galactic winds - how to launch galactic outflows in typical Lyman-break galaxies 

      von Glasow, W.; Krause, M.~G.~H.; Sommer-Larsen, J.; Burkert, A. (2013-09-11)
      We perform hydrodynamical simulations of a young galactic disc embedded in a hot gaseous halo using parameters typical for Lyman-break galaxies (LBGs). We take into account the (static) gravitational potentials due to a ...

    • The GALAH Survey : Non-LTE departure coefficients for large spectroscopic surveys 

      Amarsi, A. M.; Lind, K.; Osorio, Y.; Nordlander, T.; Bergemann, M.; Reggiani, H.; Wang, E. X.; Buder, S.; Asplund, M.; Barklem, P. S.; Wehrhahn, A.; Skúladóttir, Á.; Kobayashi, C.; Karakas, A. I.; Gao, X. D.; Bland-Hawthorn, J.; Silva, G. M. De; Kos, J.; Lewis, G. F.; Martell, S. L.; Sharma, S.; Simpson, J. D.; Zucker, D. B.; Čotar, K.; Horner, J.; collaboration, the GALAH (2020-10-06)
      Massive sets of stellar spectroscopic observations are rapidly becoming available and these can be used to determine the chemical composition and evolution of the Galaxy with unprecedented precision. One of the major ...

    • The GALAH Survey: Chemical tagging and chrono-chemodynamics of accreted halo stars with GALAH+ DR3 and $Gaia$ eDR3 

      Buder, Sven; Lind, Karin; Ness, Melissa K.; Feuillet, Diane K.; Horta, Danny; Monty, Stephanie; Buck, Tobias; Nordlander, Thomas; Bland-Hawthorn, Joss; Casey, Andrew R.; Silva, Gayandhi M. De; D'Orazi, Valentina; Freeman, Ken C.; Hayden, Michael R.; Kos, Janez; Martell, Sarah L.; Lewis, Geraint F.; Lin, Jane; Schlesinger, Katharine J.; Sharma, Sanjib; Simpson, Jeffrey D.; Stello, Dennis; Zucker, Daniel B.; Zwitter, Tomaz; Ciuca, Ioana; Horner, Jonathan; Kobayashi, Chiaki; Ting, Yuan-Sen; Wyse, Rosemary F. G.; Collaboration, The GALAH (2022-02-01)
      Since the advent of $Gaia$ astrometry, it is possible to identify massive accreted systems within the Galaxy through their unique dynamical signatures. One such system, $Gaia$-Sausage-Enceladus (GSE), appears to be an early ...

    • The GALAH+ Survey : Third Data Release 

      Buder, Sven; Sharma, Sanjib; Kos, Janez; Amarsi, Anish M.; Nordlander, Thomas; Lind, Karin; Martell, Sarah L.; Asplund, Martin; Bland-Hawthorn, Joss; Casey, Andrew R.; Silva, Gayandhi M. De; D'Orazi, Valentina; Freeman, Ken C.; Hayden, Michael R.; Lewis, Geraint F.; Lin, Jane; Schlesinger, Katharine J.; Simpson, Jeffrey D.; Stello, Dennis; Zucker, Daniel B.; Zwitter, Tomaz; Beeson, Kevin L.; Buck, Tobias; Casagrande, Luca; Clark, Jake T.; Cotar, Klemen; Costa, Gary S. Da; Grijs, Richard de; Feuillet, Diane; Horner, Jonathan; Kafle, Prajwal R.; Khanna, Shourya; Kobayashi, Chiaki; Liu, Fan; Montet, Benjamin T.; Nandakumar, Govind; Nataf, David M.; Ness, Melissa K.; Spina, Lorenzo; Tepper-Garcia, Thor; Ting, Yuan-Sen; Traven, Gregor; Vogrincic, Rok; Wittenmyer, Robert A.; Wyse, Rosemary F. G.; Zerjal, Marusa; collaboration, the GALAH (2021-05-06)
      The ensemble of chemical element abundance measurements for stars, along with precision distances and orbit properties, provides high-dimensional data to study the evolution of the Milky Way. With this third data release ...

    • GALAPAGOS-C : Analysis of galaxy morphologies using high-performance computing methods 

      Hiemer, Andreas; Barden, Marco; Kelvin, Lee S.; Häußler, Boris; Schindler, Sabine (2014-11-11)
      We present GALAPAGOS-C, a code designed to process a complete set of survey images through automation of source detection (via SEXTRACTOR), postage stamp cutting, object mask preparation, sky background estimation and ...

    • Galaxies in Southern Bright Star Fields: 1 - Near-infrared imaging 

      Baker, A.J.; Davies, R.L.; Lehnert, M.D.; Thatte, N.; Vacca, W.D.; Hainaut, O.R.; Jarvis, M.J.; Miley, G.K.; Rottgering, H.J.A. (2003)

    • Galaxy And Mass Assembly (GAMA) : The 325-MHz Radio Luminosity Function of AGN and Star Forming Galaxies 

      Prescott, Matthew; Mauch, T.; Jarvis, M.J.; McAlpine, K.; Smith, Daniel; Fine, S.; Johnston, R.; Hardcastle, M.J.; Baldry, I. K.; Brough, S.; Brown, M. J. I.; Bremer, M.N.; Driver, S. P.; Hopkins, A. M.; Kelvin, L. S.; Loveday, J.; Norberg, P.; Obreschkow, D.; Sadler, E.M. (2016-03-21)
      Measurement of the evolution of both active galactic nuclei (AGN) and star-formation in galaxies underpins our understanding of galaxy evolution over cosmic time. Radio continuum observations can provide key information ...

    • Galaxy and mass assembly (GAMA) : The wavelength-dependent sizes and profiles of galaxies revealed by MegaMorph 

      Vulcani, Benedetta; Bamford, Steven P.; Häußler, Boris; Vika, Marina; Rojas, Alex L.; Agius, Nicola K.; Baldry, Ivan K.; 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. (2014-06-21)
      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 AndMass Assembly survey.We ...

    • Galaxy and Mass Assembly (GAMA): survey diagnostics and core data release 

      Driver, S. P.; Hill, D. T.; Kelvin, L. S.; Robotham, A. S. G.; Liske, J.; Norberg, P.; Baldry, I.K.; Bamford, S. P.; Hopkins, A. M.; Loveday, J.; Peacock, J.A.; Andrae, E.; Bland-Hawthorn, J.; Brough, S.; Brown, M. J. I.; Cameron, E.; Ching, J. H. Y.; Colless, M.; Conselice, C. J.; Croom, S. M.; Cross, N.J.G.; De Propris, R.; Dye, S.; Drinkwater, M. J.; Ellis, S.; Graham, Alister W.; Grootes, M. W.; Gunawardhana, M.; Jones, D. H.; van Kampen, E.; Maraston, C.; Nichol, R.C.; Parkinson, H. R.; Phillipps, S.; Pimbblet, K.; Popescu, C. C.; Prescott, M.; Roseboom, I.G.; Sadler, E.M.; Sansom, A. E.; Sharp, R.G.; Smith, Daniel; Taylor, E.; Thomas, D.; Tuffs, R. J.; Wijesinghe, D.; Dunne, L.; Frenk, C. S.; Jarvis, M.J.; Madore, B. F.; Meyer, M. J.; Seibert, M.; Staveley-Smith, L.; Sutherland, W. J.; Warren, S.J. (2011-05)
      The Galaxy and Mass Assembly (GAMA) survey has been operating since 2008 February on the 3.9-m Anglo-Australian Telescope using the AAOmega fibre-fed spectrograph facility to acquire spectra with a resolution of R approximate ...

    • Galaxy cluster X-ray luminosity scaling relations from a representative local sample (REXCESS) 

      Pratt, G.W.; Croston, J.H.; Arnaud, M.; Boehringer, H. (2009)

    • Galaxy Clusters around Radio-loud Active Galactic Nuclei at 1.3 lt z lt 3.2 as seen by Spitzer 

      Wylezalek, D.; Galametz, A.; Stern, D.; Vernet, J.; De Breuck, C.; Seymour, N.; Brodwin, M.; Eisenhardt, P.R.M.; Gonzalez, A.H.; Hatch, N.; Jarvis, M.J.; Rettura, A.; Stanford, S. A.; Stevens, J.A. (2013-05-01)
      We report the first results from the Clusters Around Radio-Loud AGN program, a Cycle 7 and 8 Spitzer Space Telescope snapshot program to investigate the environments of a large sample of obscured and unobscured luminous ...