Browsing by Author "Ashby, Matthew"

Now showing items 1-16 of 16

    • 3c 220.3: A Radio Galaxy Lensing a Submillimeter Galaxy 

      Haas, Martin; Leipski, Christian; Barthel, Peter; Wilkes, Belinda Jane; Vegetti, Simona; Bussmann, R. Shane; Willner, Steven P.; Westhues, Christian; Ashby, Matthew L N; Chini, Rolf; Clements, David L.; Fassnacht, Christopher D.; Horesh, Assaf; Klaas, Ulrich; Koopmans, Léon V. E.; Kuraszkiewicz, Joanna; Lagattuta, David J.; Meisenheimer, Klaus; Stern, Daniel; Wylezalek, Dominika (IOP Publishing, 2014)
      Herschel Space Observatory photometry and extensive multiwavelength follow-up have revealed that the powerful radio galaxy (PRG) 3C 220.3 at z = 0.685 acts as a gravitational lens for a background submillimeter galaxy (SMG) ...

    • Chandra X-Ray Observations of the Redshift 1.53 Radio-Loud Quasar 3c 270.1 

      Wilkes, Belinda Jane; Lal, Dharam V.; Worrall, Diana M.; Birkinshaw, Mark; Haas, Martin; Willner, Steven P.; Antonucci, Robert; Ashby, Matthew L N; Avara, Mark; Barthel, Peter; Chini, Rolf; Fazio, Giovanni Gene; Hardcastle, Martin; Lawrence, Charles; Leipski, Christian; Ogle, Patrick; Schulz, Bernhard (IOP Publishing, 2012)
      Chandra X-ray observations of the high redshift (z = 1.532) radio-loud quasar 3C 270.1 in 2008 February show the nucleus to have a power-law spectrum, Γ = 1.66 ± 0.08, typical of a radio-loud quasar, and a marginally ...

    • Clustering of Red Galaxies around the Z = 1.53 Quasar 3C 270.1 

      Haas, Martin; Willner, Steven P.; Heymann, Frank; Ashby, Matthew L N; Fazio, Giovanni Gene; Wilkes, Belinda Jane; Chini, Rolf; Siebenmorgen, Ralf; Stern, Daniel (IOP Publishing, 2009)
      In the paradigm of hierarchical galaxy formation, luminous radio galaxies mark mass assembly peaks that should contain clusters of galaxies. Observations of the z = 1.53 quasar 3C 270.1 with the Spitzer Space Telescope at ...

    • Cosmological Constraints from Sunyaev-Zel'dovich-selected Clusters with X-Ray Observations in the First 178 deg2 of the South Pole Telescope Survey 

      Benson, B. A.; de Haan, T.; Dudley, J. P.; Reichardt, C. L.; Aird, K. A.; Andersson, K.; Armstrong, R.; Ashby, Matthew L N; Bautz, M.; Bayliss, Matthew; Bazin, G.; Bleem, L. E.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; Desai, S.; Dobbs, M. A.; Foley, R. J.; Forman, William R.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Harrington, N.; High, F. W.; Holder, G. P.; Holzapfel, W. L.; Hoover, S.; Hrubes, J. D.; Jones, C.; Joy, M.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Mantz, A.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Mohr, J. J.; Montroy, T. E.; Murray, S. S.; Natoli, T.; Padin, S.; Plagge, T.; Pryke, C.; Rest, A.; Ruel, Jonathan; Ruhl, J. E.; Saliwanchik, B. R.; Saro, A.; Sayre, J. T.; Schaffer, K. K.; Shaw, L.; Shirokoff, E.; Song, J.; Spieler, H. G.; Stalder, Brian A; Staniszewski, Z.; Stark, Antony A.; Story, K.; Stubbs, Christopher William; Suhada, R.; van Engelen, A.; Vanderlinde, K.; Vieira, J. D.; Viklinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (American Astronomical Society, 2013)
      We use measurements from the South Pole Telescope (SPT) Sunyaev-Zel'dovich (SZ) cluster survey in combination with X-ray measurements to constrain cosmological parameters. We present a statistical method that fits for the ...

    • Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-square-degree SPT-SZ survey 

      Bleem, L. E.; Stalder, Brian A; de Haan, T.; Aird, K. A.; Allen, S. W.; Applegate, D. E.; Ashby, Matthew L N; Bautz, M.; Bayliss, Matthew; Benson, B. A.; Bocquet, S.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Chiu, I.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; Desai, S.; Dietrich, J. P.; Dobbs, M. A.; Foley, R. J.; Forman, William R.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Hennig, C.; Hoekstra, H.; Holder, G. P.; Holzapfel, W. L.; Hrubes, J. D.; Jones, C.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Mantz, A.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Meyer, S. S.; Mocanu, L.; Mohr, J. J.; Murray, S. S.; Padin, S.; Pryke, C.; Reichardt, C. L.; Rest, Armin Wolfgang; Ruel, J.; Ruhl, J. E.; Saliwanchik, B. R.; Saro, A.; Sayre, J. T.; Schaffer, K. K.; Schrabback, T.; Shirokoff, E.; Song, J.; Spieler, H. G.; Stanford, S. A.; Staniszewski, Z.; Stark, Antony A.; Story, K. T.; Stubbs, Christopher William; Vanderlinde, K.; Vieira, J. D.; Vikhlinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (IOP Publishing, 2015)
      We present a catalog of galaxy clusters selected via their Sunyaev-Zel'dovich (SZ) effect signature from 2500 deg2 of South Pole Telescope (SPT) data. This work represents the complete sample of clusters detected at high ...

    • Mass Calibration and Cosmological Analysis of the SPT-SZ Galaxy Cluster Sample Using Velocity Dispersion σ v and X-Ray Y X Measurements 

      Bocquet, S.; Saro, A.; Mohr, J. J.; Aird, K. A.; Ashby, Matthew L N; Bautz, M.; Bayliss, Matthew; Bazin, G.; Benson, B. A.; Bleem, L. E.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Chiu, I.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; Desai, S.; de Haan, T.; Dietrich, J. P.; Dobbs, M. A.; Foley, R. J.; Forman, William R.; Gangkofner, D.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Hennig, C.; Hlavacek-Larrondo, J.; Holder, G. P.; Holzapfel, W. L.; Hrubes, J. D.; Jones, C.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Meyer, S. S.; Mocanu, L.; Murray, S. S.; Padin, S.; Pryke, C.; Reichardt, C. L.; Rest, Armin Wolfgang; Ruel, J.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, J. T.; Schaffer, K. K.; Shirokoff, E.; Spieler, H. G.; Stalder, Brian A; Stanford, S. A.; Staniszewski, Z.; Stark, Antony A.; Story, K.; Stubbs, Christopher William; Vanderlinde, K.; Vieira, J. D.; Vikhlinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (IOP Publishing, 2015)
      We present a velocity-dispersion-based mass calibration of the South Pole Telescope Sunyaev-Zel'dovich effect survey (SPT-SZ) galaxy cluster sample. Using a homogeneously selected sample of 100 cluster candidates from 720 ...

    • Merger Signatures in the Dynamics of Star-Forming Gas 

      Hung (洪肇伶), Chao-Ling; Hayward, Christopher C.; Smith, Howard A.; Ashby, Matthew L N; Lanz, Lauranne; Martínez-Galarza, Juan R.; Sanders, D. B.; Zezas, Andreas (American Astronomical Society, 2016)
      The recent advent of integral field spectrographs and millimeter interferometers has revealed the internal dynamics of many hundreds of star-forming galaxies. Spatially resolved kinematics have been used to determine the ...

    • Mid-Infrared Spectroscopy of High-Redshift 3crr Sources 

      Leipski, C.; Haas, Mary Elizabeth; Willner, Steven P.; Ashby, Matthew L N; Wilkes, Belinda Jane; Fazio, Giovanni Gene; Antonucci, R.; Barthel, P.; Chini, R.; Siebenmorgen, R.; Ogle, P.; Heymann, F. (IOP Publishing, 2010)
      Using the Spitzer Space Telescope, we have obtained rest-frame 9–16 μm spectra of 11 quasars and 9 radio galaxies from the 3CRR catalog at redshifts 1.0 <z< 1.4. This complete flux-limited 178 MHz selected sample is unbiased ...

    • Near‐ and Mid‐Infrared Photometry of High‐Redshift 3CR Sources 

      Haas, Martin; Willner, Steven P.; Heymann, Frank; Ashby, Matthew L N; Fazio, Giovanni Gene; Wilkes, Belinda Jane; Chini, Rolf; Siebenmorgen, Ralf (IOP Publishing, 2008)
      Using the Spitzer Space Telescope, we have obtained 3.6-24 μm photometry of 38 radio galaxies and 24 quasars from the 3CR (Third Cambridge Revised Catalog of Radio Sources) at redshift 1 < z < 2.5. This 178 MHz selected ...

    • Revealing the Heavily Obscured Active Galactic Nucleus Population of High-Redshift 3crr Sources With Chandra X-Ray Observations 

      Wilkes, Belinda Jane; Kuraszkiewicz, Joanna; Haas, Martin; Barthel, Peter; Leipski, Christian; Willner, Steven P.; Worrall, Diana M.; Birkinshaw, Mark; Antonucci, Robert; Ashby, Matthew L N; Chini, Rolf; Fazio, Giovanni Gene; Lawrence, Charles; Ogle, Patrick; Schulz, Bernhard (IOP Publishing, 2013)
      Chandra observations of a complete, flux-limited sample of 38 high-redshift (1 <z< 2), low-frequency-selected (and so unbiased in orientation) 3CRR radio sources are reported. The sample includes 21 quasars (=broad-line ...

    • A second report on tilt boundaries in hard sphere F.C.C. crystals 

      Frost, Harold J.; Spaepen, Frans A.; Ashby, Michael F. (Elsevier BV, 1982)

    • Simulated Galaxy Interactions as Probes of Merger Spectral Energy Distributions 

      Lanz, Lauranne; Hayward, Christopher C.; Zezas, Andreas; Smith, Howard A.; Ashby, Matthew L N; Brassington, Nicola; Fazio, Giovanni Gene; Hernquist, Lars Eric (IOP Publishing, 2014)
      We present the first systematic comparison of ultraviolet-millimeter spectral energy distributions (SEDs) of observed and simulated interacting galaxies. Our sample is drawn from the Spitzer Interacting Galaxy Survey and ...

    • SPT-CL J0205–5829: A z = 1.32 Evolved Massive Galaxy Cluster in the South Pole Telescope Sunyaev-Zel'dovich Effect Survey 

      Stalder, Brian A; Ruel, Jonathan; Šuhada, R.; Brodwin, M.; Aird, K. A.; Andersson, K.; Armstrong, R.; Ashby, Matthew L N; Bautz, M.; Bayliss, Matthew; Bazin, G.; Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; de Haan, T.; Desai, S.; Dobbs, M. A.; Dudley, J. P.; Foley, R. J.; Forman, William R.; George, E. M.; Gettings, D.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Harrington, N. L.; High, F. W.; Holder, G. P.; Holzapfel, W. L.; Hoover, S.; Hrubes, J. D.; Jones, C.; Joy, M.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Mantz, A.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Mohr, J. J.; Montroy, T. E.; Murray, Stephen S.; Natoli, T.; Nurgaliev, Daniyar Rashidovich; Padin, S.; Plagge, T.; Pryke, C.; Reichardt, C. L.; Rest, A.; Ruhl, J. E.; Saliwanchik, B. R.; Saro, A.; Sayre, J. T.; Schaffer, K. K.; Shaw, L.; Shirokoff, E.; Song, J.; Spieler, H. G.; Stanford, S. A.; Staniszewski, Z.; Stark, Antony A.; Story, K.; Stubbs, Christopher William; van Engelen, A.; Vanderlinde, K.; Vieira, J. D.; Vikhlinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (American Astronomical Society / IOP Publishing, 2013)
      The galaxy cluster SPT-CL J0205–5829 currently has the highest spectroscopically confirmed redshift, z = 1.322, in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. XMM-Newton observations measure a core-excluded ...

    • Star formation in z > 1 3CR host galaxies as seen by Herschel 

      Podigachoski, P.; Barthel, P. D.; Haas, Mary Elizabeth; Leipski, C.; Wilkes, Belinda Jane; Kuraszkiewicz, Joanna; Westhues, C.; Willner, Steven P.; Ashby, Matthew L N; Chini, R.; Clements, D. L.; Fazio, Giovanni Gene; Labiano, A.; Lawrence, C.; Meisenheimer, K.; Peletier, R. F.; Siebenmorgen, R.; Verdoes Kleijn, G. (EDP Sciences, 2015)
      We present Herschel (PACS and SPIRE) far-infrared (FIR) photometry of a complete sample of z> 1 3CR sources, from the Herschel guaranteed time project The Herschel Legacy of distant radio-loud AGN. Combining these with ...

    • The total infrared luminosity may significantly overestimate the star formation rate of quenching and recently quenched galaxies 

      Hayward, C. C.; Lanz, L.; Ashby, Matthew L N; Fazio, Giovanni Gene; Hernquist, Lars Eric; Martinez-Galarza, J. R.; Noeske, K.; Smith, Howard A.; Wuyts, S.; Zezas, Andreas (Oxford University Press (OUP), 2014)
      The total infrared (IR) luminosity is very useful for estimating the star formation rate (SFR) of galaxies, but converting the IR luminosity into an SFR relies on assumptions that do not hold for all galaxies. We test the ...

    • Variations of the Ism Compactness Across the Main Sequence of Star Forming Galaxies: Observations and Simulations 

      Martínez-Galarza, J. R.; Smith, Howard A.; Lanz, L; Hayward, Christopher C.; Zezas, Andreas; Rosenthal, L.; Weiner, A.; Hung, C.; Ashby, Matthew L N; Groves, B. (American Astronomical Society, 2016)
      The majority of star-forming galaxies follow a simple empirical correlation in the star formation rate (SFR) versus stellar mass (M∗) plane, usually referred to as the star formation Main Sequence (MS). Here we combine a ...