Browsing Research publications by Author "Walter, Fabian"

Now showing items 1-19 of 19

    • ALMA resolves turbulent, rotating [CII] emission in a young starburst galaxy at z=4.8 

      Breuck, Carlos De; Williams, Rebecca J.; Swinbank, Mark; Caselli, Paola; Coppin, Kristen; Davis, Timothy A.; Maiolino, Roberto; Nagao, Tohru; Smail, Ian; Walter, Fabian; Weiss, Axel; Zwaan, Martin (2014-05-31)
      We present spatially resolved Atacama Large Millimeter/submillimeter Array (ALMA) [CII] observations of the z=4.7555 submillimetre galaxy, ALESS 73.1. Our 0.5" FWHM map resolves the [CII] emitting gas which is centred close ...

    • An ALMA Survey of Submilleter Galaxies in the Extended Chandra Deep Field-South : The AGN Fraction and X-Ray Properties of Submillimeter Galaxies 

      Wang, S.X.; Brandt, W. N.; Luo, B.; Smail, I.; Alexander, D.M.; Danielson, A. L. R.; Hodge, J. A.; Karim, A.; Lehmer, B.D.; Simpson, James; Swinbank, A.M.; Walter, Fabian; Wardlow, Julie; Xue, Y. Q.; Chapman, S.; Coppin, Kristen; Dannerbauer, H.; De Breuck, Carlos; Menten, K. M.; van der Werf, P. (2013)
      The large gas and dust reservoirs of submillimeter galaxies (SMGs) could potentially provide ample fuel to trigger an active galactic nucleus (AGN), but previous studies of the AGN fraction in SMGs have been controversial ...

    • An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South : The Redshift Distribution and Evolution of Submillimeter Galaxies 

      Simpson, James; Swinbank, Mark; Smail, Ian; Alexander, Dave; Brandt, Niel; Bertoldi, Frank; Breuck, Carlos de; Chapman, Scott; Coppin, Kristen; Cunha, Elisabete da; Danielson, Alice; Dannerbauer, Helmut; Greve, Thomas; Hodge, Jackie; Ivison, Rob; Karim, Alex; Knudsen, Kirsten; Poggianti, Bianca; Schinnerer, Eva; Thomson, Alasdair; Walter, Fabian; Wardlow, Julie; Weiss, Axel; Werf, Paul van der (2013-10-23)
      We present the first photometric redshift distribution for a large unbiased sample of 870um selected submillimeter galaxies (SMGs) with robust identifications based on observations with the Atacama Large Millimeter Array ...

    • An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field South : High resolution 870um source counts 

      Karim, Alexander; Swinbank, Mark; Hodge, Jackie; Smail, Ian; Walter, Fabian; Biggs, Andy; Simpson, James; Danielson, Alice; Alexander, David; Bertoldi, Frank; de Breuck, Carlos; Chapman, Scott; Coppin, Kristen; Dannerbauer, Helmut; Edge, Alastair; Greve, Thomas; Ivison, Rob; Knudsen, Kirsten; Menten, Karl; Schinnerer, Eva; Wardlow, Julie; Weiß, Axel; van der Werf, Paul (2013-06)
      We report the first counts of faint submillimetre galaxies (SMG) in the 870-um band derived from arcsecond resolution observations with the Atacama Large Millimeter Array (ALMA). We have used ALMA to map a sample of 122 ...

    • BLAST : the far-infrared/radio correlation in distant galaxies 

      Ivison, R.J.; Alexander, David M.; Biggs, Andy D.; Brandt, W.N.; Chapin, E.L.; Coppin, Kristen; Devlin, Mark J.; Dickinson, Mark; Dunlop, James; Dye, Simon; Eales, Stephen A.; Frayer, David T.; Halpern, Mark; Hughes, David H.; Ibar, Edo; Kovacs, A.; Marsden, Gaelen; Moncelsi, L.; Netterfield, Calvin B.; Pascale, Enzo; Patanchon, Guillaume; Rafferty, D. A.; Rex, Marie; Schinnerer, Eva; Scott, Douglas; Semisch, C.; Smail, Ian; Swinbank, A. M.; Truch, Matthew D.P.; Tucker, Gregory S.; Viero, M.P.; Walter, Fabian; Weiss, Axel; Wiebe, Donald V.; Xue, Y.Q. (2010)
      We investigate the correlation between far-infrared (FIR) and radio luminosities in distant galaxies, a lynchpin of modern astronomy. We use data from the Balloon-borne Large Aperture Submillimetre Telescope (BLAST), ...

    • The case for a 'sub-millimeter SDSS' : a 3D map of galaxy evolution to z~10 

      Geach, James E.; Banerji, Manda; Bertoldi, Frank; Bethermin, Matthieu; Casey, Caitlin M.; Chen, Chian-Chou; Clements, David L.; Cicone, Claudia; Combes, Francoise; Conselice, Christopher; Cooray, Asantha; Coppin, Kristen; Daddi, Emanuele; Dannerbauer, Helmut; Dave, Romeel; Doherty, Matthew; Dunlop, James S.; Edge, Alastair; Farrah, Duncan; Franco, Maximilien; Fuller, Gary; Garratt, Tracy; Gear, Walter; Greve, Thomas R.; Hatziminaoglou, Evanthia; Hayward, Christopher C.; Ivison, Rob J.; Kawabe, Ryohei; Klaassen, Pamela; Knudsen, Kirsten K.; Kohno, Kotaro; Koprowski, Maciej; Lagos, Claudia D. P.; Magdis, Georgios E.; Magnelli, Benjamin; McGee, Sean L.; Michalowski, Michal; Mroczkowski, Tony; Noroozian, Omid; Oliver, Seb; Riechers, Dominik; Rujopakarn, Wiphu; Scott, Douglas; Serjeant, Stephen; Smith, Matthew W. L.; Swinbank, Mark; Tamura, Yoichi; Werf, Paul van der; Kampen, Eelco van; Verma, Aprajita; Vieira, Joaquin; Wagg, Jeff; Walter, Fabian; Wang, Lingyu; Wootten, Al; Yun, Min S. (2019-05-31)
      The Sloan Digital Sky Survey (SDSS) was revolutionary because of the extraordinary breadth and ambition of its optical imaging and spectroscopy. We argue that a 'sub-millimeter SDSS' - a sensitive large-area imaging+spectroscopic ...

    • The Decoupled Kinematics of High- z QSO Host Galaxies and Their Ly α Halos 

      Drake, Alyssa B.; Neeleman, Marcel; Venemans, Bram P.; Novak, Mladen; Walter, Fabian; Bañados, Eduardo; Decarli, Roberto; Farina, Emanuele Paolo; Mazzucchelli, Chiara; Trebitsch, Maxime (2022-04-15)
      We present a comparison of the interstellar medium traced by [C ii] (Atacama Large Millimeter/submillimeter Array), and ionized halo gas traced by Lyα (Multi Unit Spectroscopic Explorer), in and around QSO host galaxies ...

    • Detection of molecular gas in a distant submillimetre galaxy at z=4.76 with ATCA 

      Coppin, Kristen; Chapman, Scott; Smail, Ian; Swinbank, Mark; Walter, Fabian; Wardlow, Julie; Weiss, Axel; M. Alexander, David; Brandt, Niel; Dannerbauer, Helmut; De Breuck, Carlos; Dickinson, Mark; Dunlop, James; Edge, Alastair; Emonts, Bjorn; Greve, Thomas; Huynh, Minh; Ivison, Rob; Knudsen, Kirsten; Menten, Karl; Schinnerer, Eva; van der Werf, Paul (2010)
      We have detected the CO(2-1) transition from the submillimetre galaxy (SMG) LESSJ033229.4-275619 at z=4.755 using the new Compact Array Broadband Backend system on the Australian Telescope Compact Array. These data have ...

    • Estimating the star formation rate at 1 kpc scales in nearby galaxies. 

      Leroy, Adam K.; Bigiel, Frank; de Blok, W.J.G.; Boissier, Samuel; Bolatto, Alberto; Brinks, E.; Madore, Barry; Munoz-Mateos, Juan-Carlos; Murphy, Eric; Sandstrom, Karin; Schruba, Andreas; Walter, Fabian (2012-07)
      Using combinations of H alpha, ultraviolet (UV), and infrared (IR) emission, we estimate the star formation rate (SFR) surface density, Sigma(SFR), at 1 kpc resolution for 30 disk galaxies that are targets of the IRAM ...

    • H I in galactic disks 

      Brinks, E.; Bigiel, Frank; Leroy, Adam; Walter, Fabian; de Blok, W. J. G.; Bagetakos, Ioannis; Usero, Antonio; Kennicutt, Robert C. (Cambridge University Press, 2009)
      Studies of the atomic phase of the interstellar medium, via the 21-cm spectral line of neutral hydrogen (H I), play a key role in our attempts to understand the structure and evolution of disk galaxies. We present here ...

    • High-resolution mass models of dwarf galaxies from LITTLE THINGS 

      Oh, Se-Heon; Hunter, Deidre A.; Brinks, E.; Elmegreen, Bruce G.; Schruba, Andreas; Walter, Fabian; Rupen, Michael P.; Young, Lisa M.; Simpson, Caroline E.; Johnson, Megan; Herrmann, Kimberly A.; Ficut-Vicas, Dana; Cigan, Phil; Heesen, V.; Ashley, Trisha; Zhang, Hong-Xin (2015-06)
      We present high-resolution rotation curves and mass models of 26 dwarf galaxies from LITTLE THINGS. LITTLE THINGS is a high-resolution Very Large Array HI survey for nearby dwarf galaxies in the local volume within 11 Mpc. ...

    • Low CO luminosities in dwarf galaxies 

      Schruba, Andreas; Leroy, Adam K.; Walter, Fabian; Bigiel, Frank; Brinks, E.; de Blok, W.J.G.; Kramer, Carsten; Rosolowsky, Erik; Sandstrom, Karin; Schuster, Karl; Usero, Antonio; Weiss, Axel; Wiesemeyer, Helmut (2012-05-07)
      We present maps of (12)COJ = 2-1 emission covering the entire star-forming disks of 16 nearby dwarf galaxies observed by the IRAM HERACLES survey. The data have 13 '' angular resolution, similar to 250 pc at our average ...

    • MeerKAT HI commissioning observations of MHONGOOSE galaxy ESO 302-G014 

      Blok, W. J. G. de; Athanassoula, E.; Bosma, Albert; Combes, Francoise; English, J.; Heald, George H.; Kamphuis, P.; Koribalski, B. S.; Meurer, G. R.; Román, J.; Sardone, A.; Verdes-Montenegro, L.; Bigiel, F.; Brinks, E.; Chemin, L.; Fraternali, F.; Jarrett, T.; Kleiner, D.; Maccagni, F. M.; Pisano, D. J.; Serra, P.; Spekkens, K.; Amram, P.; Carignan, C.; Dettmar, R-J; Gibson, B. K.; Holwerda, B. W.; Józsa, G. I. G; Lucero, D. M.; Oosterloo, T. A.; Ramaila, A. J. T.; Ramatsoku, M.; Sheth, K.; Walter, Fabian; Wong, O.I.; Zijlstra, A. A.; Bloemen, S.; Groot, P. J.; Poole, R. Le; Klein-Wolt, M.; Körding, E. G.; McBride, V. A.; Paterson, K.; Pieterse, D. L. A.; Vreeswijk, P.; Woudt, P. A. (2020-09-22)
      We present the results of three commissioning HI observations obtained with the MeerKAT radio telescope. These observations make up part of the preparation for the forthcoming MHONGOOSE nearby galaxy survey, which is a ...

    • Smooth HI Low Column Density Outskirts In Nearby Galaxies 

      Ianjamasimanana, Roger; Walter, Fabian; Blok, W. J. G. de; Heald, George H.; Brinks, Elias (2018-05-14)
      The low column density gas at the outskirts of galaxies as traced by the 21 cm hydrogen line emission (H i) represents the interface between galaxies and the intergalactic medium, i.e., where galaxies are believed to get ...

    • A SPectroscopic Survey of Biased Halos in the Reionization Era (ASPIRE): A First Look at the Rest-frame Optical Spectra of z > 6.5 Quasars Using JWST 

      Yang, Jinyi; Wang, Feige; Fan, Xiaohui; Hennawi, Joseph F.; Barth, Aaron J.; Bañados, Eduardo; Sun, Fengwu; Liu, Weizhe; Cai, Zheng; Jiang, Linhua; Li, Zihao; Onoue, Masafusa; Schindler, Jan-Torge; Shen, Yue; Wu, Yunjing; Bhowmick, Aklant K.; Bieri, Rebekka; Blecha, Laura; Bosman, Sarah; Champagne, Jaclyn B.; Colina, Luis; Connor, Thomas; Costa, Tiago; Davies, Frederick B.; Decarli, Roberto; De Rosa, Gisella; Drake, Alyssa B.; Egami, Eiichi; Eilers, Anna-Christina; Evans, Analis E.; Farina, Emanuele Paolo; Habouzit, Melanie; Haiman, Zoltan; Jin, Xiangyu; Jun, Hyunsung D.; Kakiichi, Koki; Khusanova, Yana; Kulkarni, Girish; Loiacono, Federica; Lupi, Alessandro; Mazzucchelli, Chiara; Pan, Zhiwei; Rojas-Ruiz, Sofía; Strauss, Michael A.; Tee, Wei Leong; Trakhtenbrot, Benny; Trebitsch, Maxime; Venemans, Bram; Vestergaard, Marianne; Volonteri, Marta; Walter, Fabian; Xie, Zhang-Liang; Yue, Minghao; Zhang, Haowen; Zhang, Huanian; Zou, Siwei (2023-07-01)
      Studies of rest-frame optical emission in quasars at z > 6 have historically been limited by the wavelengths accessible by ground-based telescopes. The James Webb Space Telescope (JWST) now offers the opportunity to probe ...

    • A SPectroscopic Survey of Biased Halos in the Reionization Era (ASPIRE): JWST Reveals a Filamentary Structure around a z = 6.61 Quasar 

      Wang, Feige; Yang, Jinyi; Hennawi, Joseph F.; Fan, Xiaohui; Sun, Fengwu; Champagne, Jaclyn B.; Costa, Tiago; Habouzit, Melanie; Endsley, Ryan; Li, Zihao; Lin, Xiaojing; Meyer, Romain A.; Schindler, Jan–Torge; Wu, Yunjing; Bañados, Eduardo; Barth, Aaron J.; Bhowmick, Aklant K.; Bieri, Rebekka; Blecha, Laura; Bosman, Sarah; Cai, Zheng; Colina, Luis; Connor, Thomas; Decarli, Roberto; De Rosa, Gisella; Drake, Alyssa B.; Egami, Eiichi; Eilers, Anna-Christina; Evans, Analis E.; Farina, Emanuele Paolo; Haiman, Zoltan; Jiang, Linhua; Jin, Xiangyu; Jun, Hyunsung D.; Kakiichi, Koki; Khusanova, Yana; Kulkarni, Girish; Li, Mingyu; Liu, Weizhe; Loiacono, Federica; Lupi, Alessandro; Mazzucchelli, Chiara; Onoue, Masafusa; Pudoka, Maria A.; Rojas-Ruiz, Sofía; Shen, Yue; Strauss, Michael A.; Tee, Wei Leong; Trakhtenbrot, Benny; Trebitsch, Maxime; Venemans, Bram; Volonteri, Marta; Walter, Fabian; Xie, Zhang-Liang; Yue, Minghao; Zhang, Haowen; Zhang, Huanian; Zou, Siwei (2023-07-01)
      We present the first results from the JWST program A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE). This program represents an imaging and spectroscopic survey of 25 reionization-era quasars and ...

    • A submillimetre galaxy at z=4.76 in the LABOCA survey of the Extended Chandra Deep Field South 

      Coppin, Kristen; Smail, Ian; M. Alexander, David; Weiss, Axel; Walter, Fabian; Swinbank, Mark; Greve, Thomas; Kovacs, Attila; De Breuck, Carlos; Dickinson, Mark; Ibar, Edo; Ivison, Rob; Reddy, Naveen; Spinrad, Hyron; Stern, Daniel; Brandt, Niel; Chapman, Scott; Dannerbauer, Helmut; van Dokkum, Pieter; Dunlop, James; Frayer, David; Gawiser, Eric; Geach, James; Huynh, Minh; Knudsen, Kirsten; Koekemoer, Anton; Lehmer, Bret; Menten, Karl; Papovich, Casey; Rix, Hans-Walter; Schinnerer, Eva; Wardlow, Julie; van der Werf, Paul (2009)
      We report on the identification of the highest redshift submm-selected source currently known: LESSJ033229.4-275619. This source was detected in the Large Apex BOlometer CAmera (LABOCA) Extended Chandra Deep Field South ...

    • Variations in the Star Formation Efficiency of the Dense Molecular Gas across the Disks of Star-Forming Galaxies 

      Usero, Antonio; Leroy, Adam K.; Walter, Fabian; Schruba, Andreas; García-Burillo, Santiago; Sandstrom, Karin; Bigiel, Frank; Brinks, E.; Kramer, Carsten; Rosolowsky, Erik; Schuster, Karl-Friedrich; de Blok, W.J.G. (2015-10)
      We present a new survey of HCN(1-0) emission, a tracer of dense molecular gas, focused on the little-explored regime of normal star-forming galaxy disks. Combining HCN, CO, and infrared (IR) emission, we investigate the ...

    • The X–shooter/ALMA Sample of Quasars in the Epoch of Reionization. II. Black Hole Masses, Eddington Ratios, and the Formation of the First Quasars 

      Farina, Emanuele Paolo; Schindler, Jan-Torge; Walter, Fabian; Bañados, Eduardo; Davies, Frederick B.; Decarli, Roberto; Eilers, Anna-Christina; Fan, Xiaohui; Hennawi, Joseph F.; Mazzucchelli, Chiara; Meyer, Romain A.; Trakhtenbrot, Benny; Volonteri, Marta; Wang, Feige; Worseck, Gábor; Yang, Jinyi; Gutcke, Thales A.; Venemans, Bram P.; Bosman, Sarah E. I.; Costa, Tiago; Rosa, Gisella De; Drake, Alyssa B.; Onoue, Masafusa (2022-12-20)
      We present measurements of black hole masses and Eddington ratios (λ Edd) for a sample of 38 bright (M 1450 < −24.4 mag) quasars at 5.8 ≲ z ≲ 7.5, derived from Very Large Telescope/X-shooter near-IR spectroscopy of their ...