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Browsing by Author "Centre for Astrophysics Research"

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  • Wilson, Warwick E.; Ferris, R. H.; Axtens, P.; Brown, A.; Davis, E.; Hampson, G.; Leach, M.; Roberts, P.; Saunders, S.; Koribalski, B. S.; Caswell, J. L.; Lenc, E.; Stevens, J.; Voronkov, M. A.; Wieringa, M. H.; Brooks, K.; Edwards, P. G.; Ekers, R. D.; Emonts, B.; Hindson, L.; Johnston, S.; Maddison, S. T.; Mahony, E. K.; Malu, S. S.; Massardi, M.; Mao, M. Y.; McConnell, D.; Norris, R. P.; Schnitzeler, D.; Subrahmanyan, R.; Urquhart, J. S.; Thompson, Mark; Wark, R. M. (2011-09)
    Here, we describe the Compact Array Broad-band Backend (CABB) and present first results obtained with the upgraded Australia Telescope Compact Array (ATCA). The 16-fold increase in observing bandwidth, from 2 x 128 to 2 x ...
  • Hine, N. K.; Geach, J. E.; Matsuda, Y.; Lehmer, B. D.; Michalowski, M. J.; Farrah, D.; Spaans, M.; Oliver, S. J.; Smith, D. J. B.; Chapman, S. C.; Jenness, T.; Alexander, D. M.; Robson, I.; Werf, P. van der (2016-08-21)
    Ly-alpha blobs (LABs) offer insight into the complex interface between galaxies and their circumgalactic medium. Whilst some LABs have been found to contain luminous star-forming galaxies and active galactic nuclei that ...
  • Isern, J.; Garcia-Berro, E.; Torres, S.; Catalan, Silvia (2008-08-01)
    White dwarfs are the end product of the lives of intermediate- and low-mass stars and their evolution is described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision ...
  • Isern, J.; Catalan, Silvia; Garcia-Berro, E.; Torres, S. (2009)
    The evolution of white dwarfs can be described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision their luminosity function, that is, the number of stars per unit volume ...
  • Wardlow, J. L.; Smail, Ian; Wilson, G.W.; Yun, M. S.; Coppin, Kristen; Cybulski, R.; Geach, J. E.; Ivison, R.J.; Aretxaga, I.; Austermann, J.E.; Edge, A. C.; Fazio, G. G.; Huang, J.; Hughes, D. H.; Kodama, T.; Kang, Y.; Kim, S.; Perera, T. A.; Scott, K. S. (2010)
    We have undertaken a deep (sigma~1.1 mJy) 1.1-mm survey of the z=0.54 cluster MS 0451.6-0305 using the AzTEC camera on the James Clerk Maxwell Telescope. We detect 36 sources with S/N>3.5 in the central 0.10 deg^2 and ...
  • Chapin, E.L.; Pope, A.; Scott, D.; Aretxaga, I.; Austermann, J.E.; Chary, R-R.; Coppin, Kristen; Halpern, M.; Hughes, D.H.; Lowenthal, J.D.; Morrison, G.E.; Perera, T.A.; Scott, K.S.; Wilson, G.W.; Yun, M. S. (2009-10-01)
    We present results from a multiwavelength study of 29 sources (false detection probabilities
  • Perera, T.A.; Chapin, E.L.; Austermann, J.E.; Scott, K.S.; Wilson, G.W.; Halpern, M.; Pope, A.; Scott, D.; Yun, M.S.; Lowenthal, J.D.; Morrison, G.; Aretxaga, I.; Bock, J.J.; Coppin, Kristen; Crowe, M.; Frey, L.; Hughes, D.H.; Kang, Y.; Kim, S.; Mauskopf, P. D. (2008-12-01)
    We have conducted a deep and uniform 1.1 mm survey of the Great Observatories Origins Deep Survey-North (GOODS-N) field with AzTEC on the James Clerk Maxwell Telescope. Here, we present the first results from this survey ...
  • Michalowski, M. J.; Dunlop, J.S.; Ivison, R.J.; Cirasuolo, M.; Caputi, K.I.; Aretxaga, I.; Arumugam, V.; Austermann, J.E.; Chapin, E.L.; Chapman, S.C.; Coppin, Kristen; Egami, E.; Hughes, D.H.; Ibar, E.; Mortier, A.M.J.; Schael, A.M.; Scott, K.S.; Smail, I.; Targett, T.A.; Wagg, J.; Wilson, G.W.; Xu, L.; Yun, M. (2012-11-01)
    The Astronomical Thermal Emission Camera (AzTEC) 1.1mm survey of the two SCUBA HAlf Degree Extragalactic Survey (SHADES) fields is the largest (0.7 deg ) blank-field millimetre-wavelength (mm-wavelength) survey undertaken ...
  • Austermann, J.E.; Dunlop, J.S.; Perera, T.A.; Scott, K.S.; Wilson, G.W.; Aretxaga, I.; Hughes, D.H.; Almaini, O.; Chapin, E.L.; Chapman, S. C.; Cirasuolo, M.; Clements, D. L.; Coppin, Kristen; Dunne, L.; Dye, Simon; Eales, S. A.; Stevens, J. A.; Egami, E. (2010)
    We present the first results from the largest deep extragalactic mm-wavelength survey undertaken to date. These results are derived from maps covering over 0.7 deg2, made at λ= 1.1 mm , using the AzTEC continuum camera ...
  • Gallagher, Andrew; Ryan, Sean G.; Hosford, Adam; Garcia Perez, A E; Aoki, W; Honda, S (2012)
    Context. Theory and observations of heavy element nucleosynthesis are in conflict with one-another. Theory states that in the most metal-poor stars, the rapid (r-) neutron-capture nucleosynthetic process would be dominant ...
  • Gallagher, A.J.; Ryan, Sean G.; Garcia Perez, A.E.; Aoki, W. (2010)
    Context: Current theory regarding heavy element nucleosynthesis in metal-poor environments states that the r-process would be dominant. The star HD 140283 has been the subject of debate after it appeared in some studies ...
  • Richards, S.; Martin, Bill; Campbell, D.; Jones, H.R.A.; Bland-Hawthorn, J.; Lawrence, J.; Brinks, E.; Bryant, J.J.; Fogarty, L.; Gallaway, M.; Goodwin, M.; Leon-Saval, S.; Sarzi, M.; Smith, Daniel (SPIE, 2012-09)
    We present an inexpensive (<US$500) and easily replicable integral field unit for use on small aperture telescopes. Based on a commercial small spectrograph (SBIG Self-Guiding Spectrograph) and a 37 optical fibre bundle ...
  • Mullin, L.M.; Hardcastle, M.J. (2009)
    Radio jet and core data for a complete sample of 98 Fanaroff–Riley type II sources with z < 1 are analysed with a Markov Chain Monte Carlo model fitting method to obtain constraints on bulk-flow speeds in the beam. The ...
  • Barentsen, G.; Drew, J.E.; Vink, J.S.; Sale, S.E. (2013-01-01)
    There are many pertinent open issues in the area of star and planet formation. Large statistical samples of young stars across star-forming regions are needed to trigger a breakthrough in our understanding, but most optical ...
  • Tuomi, Mikko; Jones, Hugh R. A.; Barnes, John R.; Anglada-Escudé, Guillem; Jenkins, James S. (2014-06-21)
    Due to their higher planet-star mass ratios, M dwarfs are the easiest targets for detection of low-mass planets orbiting nearby stars using Doppler spectroscopy. Furthermore, because of their low masses and luminosities, ...
  • Barbagallo, M.; Musumarra, A.; Cosentino, L.; Maugeri, E.; Heinitz, S.; Mengoni, A.; Dressler, R.; Schumann, D.; Käppeler, F.; Colonna, N.; Finocchiaro, P.; Ayranov, M.; Damone, L.; Kivel, N.; Aberle, O.; Altstadt, S.; Andrzejewski, J.; Audouin, L.; Bacak, M.; Balibrea-Correa, J.; Barros, S.; Bécares, V.; Bečvář, F.; Beinrucker, C.; Berthoumieux, E.; Billowes, J.; Bosnar, D.; Brugger, M.; Caamaño, M.; Calviani, M.; Calviño, F.; Cano-Ott, D.; Cardella, R.; Casanovas, A.; Castelluccio, D. M.; Cerutti, F.; Chen, Y. H.; Chiaveri, E.; Cortés, G.; Cortés-Giraldo, M. A.; Cristallo, S.; Diakaki, M.; Domingo-Pardo, C.; Dupont, E.; Duran, I.; Fernandez-Dominguez, B.; Ferrari, A.; Ferreira, P.; Furman, W.; Ganesan, S.; García-Rios, A.; Gawlik, A.; Glodariu, T.; Göbel, K.; Gonçalves, I. F.; González-Romero, E.; Griesmayer, E.; Guerrero, C.; Gunsing, F.; Harada, H.; Heftrich, T.; Heyse, J.; Jenkins, D. G.; Jericha, E.; Katabuchi, T.; Kavrigin, P.; Kimura, A.; Kokkoris, M.; Krtička, M.; Leal-Cidoncha, E.; Lerendegui, J.; Lederer, C.; Leeb, H.; Lo Meo, S.; Lonsdale, S. J.; Losito, R.; MacIna, D.; Marganiec, J.; Martínez, T.; Massimi, C.; Mastinu, P.; Mastromarco, M.; Mazzone, A.; Mendoza, E.; Milazzo, P. M.; Mingrone, F.; Mirea, M.; Montesano, S.; Nolte, R.; Oprea, A.; Pappalardo, A.; Patronis, N.; Pavlik, A.; Perkowski, J.; Piscopo, M.; Plompen, A.; Porras, I.; Praena, J.; Quesada, J.; Rajeev, K.; Rauscher, T.; Reifarth, R.; Riego-Perez, A.; Rout, P.; Rubbia, C.; Ryan, J.; Sabate-Gilarte, M.; Saxena, A.; Schillebeeckx, P.; Schmidt, S.; Sedyshev, P.; Smith, A. G.; Stamatopoulos, A.; Tagliente, G.; Tain, J. L.; Tarifeño-Saldivia, A.; Tassan-Got, L.; Tsinganis, A.; Valenta, S.; Vannini, G.; Variale, V.; Vaz, P.; Ventura, A.; Vlachoudis, V.; Vlastou, R.; Vollaire, J.; Wallner, A.; Warren, S.; Weigand, M.; Weiß, C.; Wolf, C.; Woods, P. J.; Wright, T.; Žugec, P. (2016-10-03)
    The energy-dependent cross section of the Be7(n,α)He4 reaction, of interest for the so-called cosmological lithium problem in big bang nucleosynthesis, has been measured for the first time from 10 meV to 10 keV neutron ...
  • Jenkins, J. S.; pavlenko, Yakiv; Ivanyuk, Oleksiy; Gallardo, Jose; jones, Matias; day-jones, Avril; Jones, H.R.A.; Ruiz, Maria-Teresa; Pinfield, D.J.; Yakovina, Larissa (2012-03)
    We present new ages and abundance measurements for the pre-main sequence star PZ Tel. PZ Tel was recently found to host a young and low-mass companion. Using FEROS spectra we have measured atomic abundances (e.g. Fe and ...
  • Baluev, Roman V.; Sokov, Evgenii N.; Shaidulin, Vakhit Sh; Sokova, Iraida A.; Jones, H.R.A.; Tuomi, Mikko; Anglada-Escudé, Guillem; Benni, Paul; Colazo, Carlos A.; Schneiter, Matias E.; D'Angelo, Carolina S. Villarreal; Burdanov, Artem Yu; Fernández-Lajús, Eduardo; Baştürk, Özgür; Hentunen, Veli-Pekka; Shadick, Stan (2015-07-01)
    We perform an analysis of ~80000 photometric measurements for the following 10 stars hosting transiting planets: WASP-2, -4, -5, -52, Kelt-1, CoRoT-2, XO-2, TrES-1, HD 189733, GJ 436. Our analysis includes mainly transit ...
  • Galvez-Ortiz, M. C.; Kuznetsov, M.; Clarke, J. R. A.; Pavlenko, Ya. V.; Pinfield, D.J.; Jones, H.R.A.; Jenkins, J. S.; Barnes, J.; Burningham, B.; Day-Jones, A. C.; Martin, E. L.; Perez, A. E. Garcia; Pokorny, R.S. (EDP Sciences, 2013)
    In order to compile a sample of ultracool dwarfs that will serve as benchmarks for testing theoretical formation and evolutionary models, we selected low-mass cool (>M7) objects that are potentially members of five known ...
  • Boesgaard, A.M.; Deliyannis, C.P.; King, J.R.; Ryan, Sean G.; Vogt, S.; Beers, T.C. (1999)
    We have determined the abundance of Be in stars with an array of metal abundances in order to enhance our understanding of the chemical evolution of the Galaxy, cosmic-ray theory, and cosmology. Observations of the Be II ...

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