Observational probes of cosmic acceleration
David H. Weinberg,Michael J. Mortonson,Daniel J. Eisenstein,Daniel J. Eisenstein,Christopher M. Hirata,Adam G. Riess,Eduardo Rozo +6 more
Reads0
Chats0
TLDR
In this article, the authors present extensive forecasts for constraints on the dark energy equation of state and parameterized deviations from General Relativity, achievable with Stage III and Stage IV experimental programs that incorporate supernovae, BAO, weak lensing, and cosmic microwave background data.About:
This article is published in Physics Reports.The article was published on 2013-09-10 and is currently open access. It has received 1253 citations till now. The article focuses on the topics: Dark energy & Lambda-CDM model.read more
Citations
More filters
Journal ArticleDOI
LSST: from Science Drivers to Reference Design and Anticipated Data Products
Željko Ivezić,Steven M. Kahn,J. Anthony Tyson,Bob Abel,Emily Acosta,R. A. Allsman,David Alonso,Yusra AlSayyad,Scott F. Anderson,John Andrew,James Roger P. Angel,George Angeli,R. Ansari,P. Antilogus,Constanza Araujo,Robert Armstrong,Kirk Arndt,Pierre Astier,Éric Aubourg,Nicole Auza,Tim Axelrod,Deborah Bard,J. Barr,A. Barrau,James G. Bartlett,Amanda E. Bauer,Brian J. Bauman,S. Baumont,Andrew C. Becker,Jacek Becla,Cristina E. Beldica,Steve Bellavia,Federica B. Bianco,Rahul Biswas,G. Blanc,Jonathan Blazek,Roger Blandford,Josh Bloom,J.R. Bogart,Tim W. Bond,A. W. Borgland,Kirk D. Borne,James Bosch,D. Boutigny,Craig A. Brackett,Andrew Bradshaw,W. N. Brandt,Michael E. Brown,James S. Bullock,Patricia R. Burchat,D. L. Burke,Gianpietro Cagnoli,Daniel Calabrese,Shawn Callahan,Alice L. Callen,Srinivasan Chandrasekharan,Glenaver Charles-Emerson,Steve Chesley,Elliott Cheu,Hsin-Fang Chiang,James Chiang,Carol Chirino,Derek Chow,David R. Ciardi,Charles F. Claver,Johann Cohen-Tanugi,Joseph J. Cockrum,Rebecca Coles,Andrew J. Connolly,Kem H. Cook,Asantha Cooray,Kevin R. Covey,Chris Cribbs,Wei Cui,Roc M. Cutri,P. N. Daly,Scott F. Daniel,Felipe Daruich,Guillaume Daubard,Greg Daues,William A. Dawson,Francisco Delgado,Alfred Dellapenna,Robert de Peyster,Miguel de Val-Borro,Seth Digel,Peter Doherty,Richard Dubois,G. P. Dubois-Felsmann,Josef Durech,Frossie Economou,Michael Eracleous,Henry C. Ferguson,Enrique Figueroa,Merlin Fisher-Levine,W. B. Focke,Michael D. Foss,James Frank,Michael D. Freemon,E. Gangler,Eric Gawiser,John C. Geary,Perry M. Gee,Marla Geha,Charles J. B. Gessner,Robert R. Gibson,D. Kirk Gilmore,T. Glanzman,William Glick,Tatiana Goldina,Daniel A. Goldstein,Iain Goodenow,Melissa L. Graham,William J. Gressler,Philippe Luc Yves Gris,Leanne P. Guy,Augustin Guyonnet,Gunther Haller,Ron Harris,P. Hascall,Justine Haupt,Fabio Hernandez,Sven Herrmann,Edward Hileman,Joshua Hoblitt,John A. Hodgson,Craig J. Hogan,Dajun Huang,M.E. Huffer,P. Ingraham,Walter R. Innes,Suzanne Jacoby,Bhuvnesh Jain,Fabrice Jammes,James Jee,Tim Jenness,G. Jernigan,Darko Jevremović,Kenneth Johns,A. S. Johnson,M. W. G. Johnson,R. Lynne Jones,Claire Juramy-Gilles,Mario Juric,Jason S. Kalirai,Nitya Kallivayalil,Bryce Kalmbach,Jeffrey P. Kantor,P. Karst,Mansi M. Kasliwal,H. Kelly,Richard Kessler,Veronica Kinnison,D. Kirkby,Lloyd Knox,Ivan Kotov,V. Krabbendam,K. Simon Krughoff,Petr Kubánek,John Kuczewski,Shri Kulkarni,John Ku,N. Kurita,Craig S. Lage,Ron Lambert,Travis Lange,J. Brian Langton,Laurent Le Guillou,D. Levine,Ming Liang,Kian-Tat Lim,Chris Lintott,Kevin E. Long,Margaux Lopez,Paul J. Lotz,Robert H. Lupton,Nate B. Lust,Lauren A. MacArthur,Ashish Mahabal,Rachel Mandelbaum,Darren S. Marsh,Philip J. Marshall,S. L. Marshall,Morgan May,Robert McKercher,Michelle McQueen,Joshua Meyers,Myriam Migliore,M. L. Miller,David J. Mills,Connor Miraval,Joachim Moeyens,David G. Monet,M. Moniez,Serge Monkewitz,Christopher Montgomery,Fritz Mueller,Gary P. Muller,Freddy Munoz Arancibia,Douglas R. Neill,Scott P. Newbry,Jean-Yves Nief,Andrei Nomerotski,Martin Nordby,Paul O'Connor,John Oliver,Scot S. Olivier,Knut Olsen,William O'Mullane,Sandra Ortiz,Shawn Osier,Russell Owen,Reynald Pain,Paul E. Palecek,John K. Parejko,James B. Parsons,Nathan M. Pease,J. Matt Peterson,John R. Peterson,Don Petravick,M. E.Libby Petrick,C. E. Petry,Francesco Pierfederici,Stephen R. Pietrowicz,R. Pike,Philip A. Pinto,Raymond Plante,S. Plate,Paul A. Price,Michael Prouza,V. Radeka,J. Rajagopal,Andrew P. Rasmussen,Nicolas Regnault,Kevin Reil,David J Reiss,Michael A. Reuter,Stephen T. Ridgway,Vincent J. Riot,Steve Ritz,Sean M. Robinson,William Roby,A. Roodman,Wayne Rosing,Cecille Roucelle,Matthew R. Rumore,Stefano Russo,Abhijit Saha,B. Sassolas,T. Schalk,Pim Schellart,Rafe Schindler,Samuel Schmidt,Donald P. Schneider,Michael Schneider,William Schoening,German Schumacher,Megan E. Schwamb,Jacques Sebag,Brian M. Selvy,G. H. Sembroski,Lynn G. Seppala,Andrew Serio,Eduardo P. Serrano,Richard A. Shaw,Ian Shipsey,Jonathan Sick,Nicole M. Silvestri,C. T. Slater,J. Allyn Smith,R. Chris Smith,Shahram Sobhani,Christine Soldahl,Lisa J. Storrie-Lombardi,Edward Stover,Michael A. Strauss,Rachel Street,Christopher W. Stubbs,Ian Sullivan,Donald W. Sweeney,John D. Swinbank,Alexander S. Szalay,Péter Takács,Stephen A. Tether,Jon J Thaler,J. G. Thayer,Sandrine Thomas,V. Thukral,Jeff Tice,David Trilling,M. Turri,Richard Van Berg,Daniel E. Vanden Berk,K. Vetter,Francoise Virieux,Tomislav Vucina,William Wahl,Lucianne M. Walkowicz,Brian Walsh,C. W. Walter,Daniel L. Wang,Shin-Yawn Wang,Michael Warner,Oliver Wiecha,Beth Willman,Scott Winters,David Wittman,Sidney C. Wolff,W. Michael Wood-Vasey,Xiuqin Wu,Bo Xin,Peter Yoachim,Hu Zhan +312 more
TL;DR: The LSST design is driven by four main science themes: probing dark energy and dark matter, taking an inventory of the solar system, exploring the transient optical sky, and mapping the Milky Way.
Journal ArticleDOI
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
Shadab Alam,Metin Ata,Stephen Bailey,Florian Beutler,Dmitry Bizyaev,Dmitry Bizyaev,Jonathan Blazek,Adam S. Bolton,Joel R. Brownstein,Angela Burden,Chia-Hsun Chuang,Chia-Hsun Chuang,Johan Comparat,Antonio J. Cuesta,Kyle S. Dawson,Daniel J. Eisenstein,Stephanie Escoffier,Héctor Gil-Marín,Héctor Gil-Marín,Jan Niklas Grieb,Nick Hand,Shirley Ho,Karen Kinemuchi,D. Kirkby,Francisco S. Kitaura,Francisco S. Kitaura,Francisco S. Kitaura,Elena Malanushenko,Viktor Malanushenko,Claudia Maraston,Cameron K. McBride,Robert C. Nichol,Matthew D. Olmstead,Daniel Oravetz,Nikhil Padmanabhan,Nathalie Palanque-Delabrouille,Kaike Pan,Marcos Pellejero-Ibanez,Marcos Pellejero-Ibanez,Will J. Percival,Patrick Petitjean,Francisco Prada,Francisco Prada,Adrian M. Price-Whelan,Beth Reid,Beth Reid,Sergio Rodríguez-Torres,Sergio Rodríguez-Torres,Natalie A. Roe,Ashley J. Ross,Ashley J. Ross,Nicholas P. Ross,Graziano Rossi,Jose Alberto Rubino-Martin,Jose Alberto Rubino-Martin,Shun Saito,Salvador Salazar-Albornoz,Lado Samushia,Ariel G. Sánchez,Siddharth Satpathy,David J. Schlegel,Donald P. Schneider,Claudia G. Scóccola,Claudia G. Scóccola,Claudia G. Scóccola,Hee-Jong Seo,Erin Sheldon,Audrey Simmons,Anže Slosar,Michael A. Strauss,Molly E. C. Swanson,Daniel Thomas,Jeremy L. Tinker,Rita Tojeiro,Mariana Vargas Magaña,Mariana Vargas Magaña,Jose Alberto Vazquez,Licia Verde,David A. Wake,David A. Wake,Yuting Wang,Yuting Wang,David H. Weinberg,Martin White,Martin White,W. Michael Wood-Vasey,Christophe Yèche,Idit Zehavi,Zhongxu Zhai,Gong-Bo Zhao,Gong-Bo Zhao +90 more
TL;DR: In this article, the authors present cosmological results from the final galaxy clustering data set of the Baryon Oscillation Spectroscopic Survey, part of the Sloan Digital Sky Survey III.
Journal ArticleDOI
The clustering of galaxies in the sdss-iii baryon oscillation spectroscopic survey: Baryon acoustic oscillations in the data release 9 spectroscopic galaxy sample
Lauren Anderson,Élric Aubourg,Stephen Bailey,Florian Beutler,Vaishali Bhardwaj,Vaishali Bhardwaj,Michael R. Blanton,Adam S. Bolton,J. Brinkmann,Joel R. Brownstein,Angela Burden,Chia-Hsun Chuang,Antonio J. Cuesta,Antonio J. Cuesta,Kyle S. Dawson,Daniel J. Eisenstein,Stephanie Escoffier,James E. Gunn,Hong Guo,Shirley Ho,K. Honscheid,Cullan Howlett,D. Kirkby,Robert H. Lupton,Marc Manera,Marc Manera,Claudia Maraston,Cameron K. McBride,Olga Mena,Francesco Montesano,Robert C. Nichol,Sebastián E. Nuza,Matthew D. Olmstead,Nikhil Padmanabhan,Nathalie Palanque-Delabrouille,John K. Parejko,Will J. Percival,Patrick Petitjean,Francisco Prada,Francisco Prada,Adrian M. Price-Whelan,Beth Reid,Beth Reid,Natalie A. Roe,Ashley J. Ross,Nicholas P. Ross,Nicholas P. Ross,Cristiano G. Sabiu,Shun Saito,Lado Samushia,Lado Samushia,Ariel G. Sánchez,David J. Schlegel,Donald P. Schneider,Claudia G. Scóccola,Claudia G. Scóccola,Hee-Jong Seo,Hee-Jong Seo,Ramin A. Skibba,Michael A. Strauss,Molly E. C. Swanson,Daniel Thomas,Jeremy L. Tinker,Rita Tojeiro,Mariana Vargas Magaña,Licia Verde,Licia Verde,David A. Wake,David A. Wake,Benjamin A. Weaver,David H. Weinberg,Martin White,Martin White,Xiaoying Xu,Christophe Yèche,Idit Zehavi,Gong-Bo Zhao +76 more
TL;DR: In this paper, the authors present a measurement of the cosmic distance scale from detections of the baryon acoustic oscillations in the clustering of galaxies from the Baryon Oscillation Spectroscopic Survey (BOSS), which is part of the Sloan Digital Sky Survey III (SDSS-III).
Journal ArticleDOI
$f(R,T)$ gravity
TL;DR: In this article, the authors considered a modified theory of gravity, where the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar and of the trace of the stress-energy tensor.
Journal ArticleDOI
The clustering of the SDSS DR7 Main Galaxy Sample I: a 4 per cent distance measure at z=0.15
Ashley J. Ross,Ashley J. Ross,Lado Samushia,Lado Samushia,Lado Samushia,Cullan Howlett,Will J. Percival,Angela Burden,Marc Manera,Marc Manera +9 more
TL;DR: In this article, a sample of spectroscopically identified galaxies with z < 0.2 from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7), covering 6813 deg(2).
References
More filters
Journal ArticleDOI
SiFTO: An Empirical Method for Fitting SNe Ia Light Curves
Alex Conley,Mark Sullivan,Eric Hsiao,Julien Guy,Pierre Astier,D. Balam,C. Balland,S. Basa,R. G. Carlberg,D. Fouchez,D. Hardin,D. A. Howell,I. M. Hook,R. Pain,K. Perrett,C. J. Pritchet,Nicolas Regnault +16 more
TL;DR: SiFTO as discussed by the authors uses a generalization of stretch which applies different stretch factors as a function of both the wavelength of the observed filter and the stretch in the rest-frame B band.
Journal ArticleDOI
Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
TL;DR: In this paper, a theoretical study of the near-infrared (NIR) lightcurves of Type Ia supernovae (SNe Ia) is conducted, where the authors use time-dependent multi-group radiative transfer calculations to calculate the UBVRIJHK-band lightcurve of model SN Ia ejecta structures.
Journal ArticleDOI
Evidence for a non-zero Lambda and a low matter density from a combined analysis of the 2dF Galaxy Redshift Survey and Cosmic Microwave Background Anisotropies
George Efstathiou,Stephen J. Moody,John A. Peacock,Will J. Percival,Carlton M. Baugh,Joss Bland-Hawthorn,Terry J. Bridges,Russell D. Cannon,Shaun Cole,Matthew Colless,Chris A. Collins,Warrick J. Couch,Gavin Dalton,Roberto De Propis,Simon P. Driver,Richard S. Ellis,Carlos S. Frenk,Karl Glazebrook,Carole Jackson,Ofer Lahav,Ian Lewis,Stuart Lumsden,Steve Maddox,Peder Norberg,Bruce A. Peterson,William J. Sutherland,Keith Taylor +26 more
TL;DR: In this paper, a joint likelihood analysis of the power spectra of the 2dF Galaxy Redshift Survey (2dFGRS) and the cosmic microwave background (CMB) anisotropies under the assumption that the initial fluctuations were adiabatic, Gaussian and well described by power laws with scalar and tensor indices of n_s and n_t.
Journal ArticleDOI
The Cosmic Microwave Background
Aled Jones,Anthony Lasenby +1 more
TL;DR: Current CMB data is used to set some preliminary constraints on the values of fundamental cosmological parameters Ω and Ho using the maximum likelihood technique and secondary anisotropies due to the Sunyaev-Zel’dovich effect are described.
Related Papers (5)
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Adam G. Riess,Alexei V. Filippenko,Peter Challis,Alejandro Clocchiatti,Alan H. Diercks,Peter M. Garnavich,R. L. Gilliland,Craig J. Hogan,Saurabh Jha,Robert P. Kirshner,Bruno Leibundgut,Mark M. Phillips,David J Reiss,Brian P. Schmidt,R. A. Schommer,R. Chris Smith,R. Chris Smith,Jason Spyromilio,Christopher W. Stubbs,Nicholas B. Suntzeff,John L. Tonry +20 more
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
Saul Perlmutter,Saul Perlmutter,Greg Aldering,Gerson Goldhaber,Gerson Goldhaber,R. A. Knop,Peter Nugent,P. G. Castro,P. G. Castro,Susana E. Deustua,Sebastien Fabbro,Sebastien Fabbro,A. Goobar,A. Goobar,Donald E. Groom,I. M. Hook,I. M. Hook,A. G. Kim,A. G. Kim,A. G. Kim,M. Y. Kim,Julia C. Lee,Julia C. Lee,Nelson J. Nunes,Nelson J. Nunes,Reynald Pain,Reynald Pain,C. R. Pennypacker,C. R. Pennypacker,Robert Quimby,Christopher Lidman,Richard S. Ellis,Mike Irwin,Richard G. McMahon,Pilar Ruiz-Lapuente,Nicholas A. Walton,Bradley E. Schaefer,B. J. Boyle,Alexei V. Filippenko,Thomas Matheson,A. S. Fruchter,Nino Panagia,Nino Panagia,Heidi Jo Newberg,Warrick J. Couch +44 more
Planck 2015 results. XIII. Cosmological parameters
Peter A. R. Ade,Nabila Aghanim,Monique Arnaud,M. Ashdown,J. Aumont,Carlo Baccigalupi,A. J. Banday,R. B. Barreiro,James G. Bartlett,N. Bartolo,E. Battaner,Richard A. Battye,K. Benabed,Alain Benoit,A. Benoit-Lévy,J.-P. Bernard,Marco Bersanelli,P. Bielewicz,J. J. Bock,Anna Bonaldi,Laura Bonavera,J. R. Bond,Julian Borrill,François R. Bouchet,F. Boulanger,M. Bucher,Carlo Burigana,R. C. Butler,Erminia Calabrese,Jean-François Cardoso,A. Catalano,Anthony Challinor,A. Chamballu,Ranga-Ram Chary,H. C. Chiang,Jens Chluba,P. R. Christensen,Sarah E. Church,David L. Clements,S. Colombi,L. P. L. Colombo,C. Combet,A. Coulais,B. P. Crill,A. Curto,F. Cuttaia,Luigi Danese,R. D. Davies,R. J. Davis,P. de Bernardis,A. de Rosa,G. de Zotti,Jacques Delabrouille,F.-X. Désert,E. Di Valentino,Clive Dickinson,Jose M. Diego,Klaus Dolag,H. Dole,S. Donzelli,Olivier Doré,Marian Douspis,A. Ducout,Jo Dunkley,X. Dupac,George Efstathiou,F. Elsner,Torsten A. Ensslin,H. K. Eriksen,Marzieh Farhang,James R. Fergusson,Fabio Finelli,Olivier Forni,M. Frailis,A. A. Fraisse,E. Franceschi,A. Frejsel,S. Galeotta,S. Galli,K. Ganga,C. Gauthier,Martina Gerbino,Tuhin Ghosh,M. Giard,Y. Giraud-Héraud,Elena Giusarma,E. Gjerløw,J. González-Nuevo,Krzysztof M. Gorski,Serge Gratton,A. Gregorio,Alessandro Gruppuso,Jon E. Gudmundsson,Jan Hamann,F. K. Hansen,Duncan Hanson,D. L. Harrison,George Helou,Sophie Henrot-Versille,C. Hernández-Monteagudo,D. Herranz,S. R. Hildebrandt,E. Hivon,Michael P. Hobson,W. A. Holmes,Allan Hornstrup,W. Hovest,Zhiqi Huang,Kevin M. Huffenberger,G. Hurier,Andrew H. Jaffe,T. R. Jaffe,W. C. Jones,Mika Juvela,E. Keihänen,Reijo Keskitalo,Theodore Kisner,R. Kneissl,J. Knoche,Lloyd Knox,Martin Kunz,Hannu Kurki-Suonio,Guilaine Lagache,Anne Lähteenmäki,J.-M. Lamarre,Anthony Lasenby,Massimiliano Lattanzi,Charles R. Lawrence,J. P. Leahy,R. Leonardi,Julien Lesgourgues,François Levrier,Antony Lewis,Michele Liguori,P. B. Lilje,M. Linden-Vørnle,M. López-Caniego,Philip Lubin,J. F. Macías-Pérez,G. Maggio,Davide Maino,N. Mandolesi,A. Mangilli,A. Marchini,Peter G. Martin,M. Martinelli,E. Martínez-González,Silvia Masi,Sabino Matarrese,Pasquale Mazzotta,P. McGehee,Peter Meinhold,Alessandro Melchiorri,J.-B. Melin,L. Mendes,A. Mennella,M. Migliaccio,M. Millea,S. Mitra,M.-A. Miville-Deschênes,A. Moneti,L. Montier,Gianluca Morgante,Daniel J. Mortlock,Adam Moss,Dipak Munshi,J. A. Murphy,Pavel Naselsky,Federico Nati,Paolo Natoli,Calvin B. Netterfield,Hans Ulrik Nørgaard-Nielsen,F. Noviello,Dmitry Novikov,I. D. Novikov,C. A. Oxborrow,F. Paci,L. Pagano,F. Pajot,R. Paladini,Daniela Paoletti,Bruce Partridge,F. Pasian,G. Patanchon,T. J. Pearson,O. Perdereau,L. Perotto,Francesca Perrotta,Valeria Pettorino,F. Piacentini,M. Piat,E. Pierpaoli,Davide Pietrobon,Stéphane Plaszczynski,Etienne Pointecouteau,G. Polenta,L. Popa,G. W. Pratt,G. Prézeau,Simon Prunet,J.-L. Puget,Jörg P. Rachen,William T. Reach,Rafael Rebolo,M. Reinecke,Mathieu Remazeilles,C. Renault,A. Renzi,I. Ristorcelli,Graca Rocha,C. Rosset,M. Rossetti,G. Roudier,B. Rouillé d'Orfeuil,Michael Rowan-Robinson,Jose Alberto Rubino-Martin,Ben Rusholme,Najla Said,Valentina Salvatelli,L. Salvati,M. Sandri,D. Santos,M. Savelainen,Giorgio Savini,Douglas Scott,Michael Seiffert,Paolo Serra,E. P. S. Shellard,Locke D. Spencer,M. Spinelli,V. Stolyarov,R. Stompor,R. Sudiwala,R. A. Sunyaev,D. Sutton,A.-S. Suur-Uski,J.-F. Sygnet,J. A. Tauber,Luca Terenzi,L. Toffolatti,M. Tomasi,M. Tristram,T. Trombetti,M. Tucci,J. Tuovinen,M. Turler,G. Umana,Luca Valenziano,Jussi-Pekka Väliviita,B. Van Tent,P. Vielva,Fabrizio Villa,L. A. Wade,Benjamin D. Wandelt,Ingunn Kathrine Wehus,Martin White,Simon D. M. White,Althea Wilkinson,D. Yvon,Andrea Zacchei,Andrea Zonca +260 more
Detection of the baryon acoustic peak in the large-scale correlation function of SDSS luminous red galaxies
Daniel J. Eisenstein,Daniel J. Eisenstein,Idit Zehavi,David W. Hogg,Roman Scoccimarro,Michael R. Blanton,Robert C. Nichol,Ryan Scranton,Hee-Jong Seo,Max Tegmark,Max Tegmark,Zheng Zheng,Scott F. Anderson,James Annis,Neta A. Bahcall,Jon Brinkmann,Scott Burles,Francisco J. Castander,Andrew J. Connolly,István Csabai,Mamoru Doi,Masataka Fukugita,Joshua A. Frieman,Joshua A. Frieman,Karl Glazebrook,James E. Gunn,John S. Hendry,Greg Hennessy,Zeljko Ivezic,Stephen M. Kent,Gillian R. Knapp,Huan Lin,Yeong Shang Loh,Robert H. Lupton,Bruce Margon,Timothy A. McKay,Avery Meiksin,Jeffrey A. Munn,Adrian Pope,Michael W. Richmond,David J. Schlegel,Donald P. Schneider,Kazuhiro Shimasaku,Chris Stoughton,Michael A. Strauss,Mark SubbaRao,Mark SubbaRao,Alexander S. Szalay,István Szapudi,Douglas L. Tucker,Brian Yanny,Donald G. York +51 more