Related papers: The Resolved Sunyaev--Zel'dovich Profiles of Nearb…

Planck Intermediate Results. V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect

Taking advantage of the all-sky coverage and broad frequency range of the Planck satellite, we study the Sunyaev-Zeldovich (SZ) and pressure profiles of 62 nearby massive clusters detected at high significance in the 14-month nominal…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Planck Collaboration , P. A. R. Ade , N. Aghanim , M. Arnaud , M. Ashdown , F. Atrio-Barandela , J. Aumont , C. Baccigalupi , A. Balbi , A. J. Banday , R. B. Barreiro , J. G. Bartlett , E. Battaner , K. Benabed , A. Benoit , J. -P. Bernard , M. Bersanelli , R. Bhatia , I. Bikmaev , H. Boehringer , A. Bonaldi , J. R. Bond , S. Borgani , J. Borrill , F. R. Bouchet , H. Bourdin , M. L. Brown , R. Burenin , C. Burigana , P. Cabella , J. -F. Cardoso , P. Carvalho , G. Castex , A. Catalano , L. Cayon , A. Chamballu , L. -Y Chiang , G. Chon , P. R. Christensen , E. Churazov , D. L. Clements , S. Colafrancesco , S. Colombi , L. P. L. Colombo , B. Comis , A. Coulais , B. P. Crill , F. Cuttaia , A. Da Silva , H. Dahle , L. Danese , R. J. Davis , P. de Bernardis , G. de Gasperis , G. de Zotti , J. Delabrouille , J. Democles , F. -X. Desert , J. M. Diego , K. Dolag , H. Dole , S. Donzelli , O. Dore , U. Dorl , M. Douspis , X. Dupac , G. Efstathiou , T. A. Ensslin , H. K. Eriksen , F. Finelli , I. Flores-Cacho , O. Forni , P. Fosalba , M. Frailis , E. Franceschi , M. Frommert , S. Galeotta , K. Ganga , R. T. Genova-Santos , M. Giard , Y. Giraud-Heraud , J. Gonzalez-Nuevo , K. M. Gorski , A. Gregorio , A. Gruppuso , F. K. Hansen , D. Harrison , A. Hempel , S. Henrot-Versille , C. Hernandez-Monteagudo , D. Herranz , S. R. Hildebrandt , E. Hivon , M. Hobson , W. A. Holmes , G. Hurier , T. R. Jaffe , A. H. Jaffe , T. Jagemann , W. C. Jones , M. Juvela , E. Keihanen , I. Khamitov , T. S. Kisner , R. Kneissl , J. Knoche , L. Knox , M. Kunz , H. Kurki-Suonio , G. Lagache , A. Lahteenmaki , J. -M. Lamarre , A. Lasenby , C. R. Lawrence , M. Le Jeune , R. Leonardi , A. Liddle , P. B. Lilje , M. Lopez-Caniego , G. Luzzi , J. F. Macias-Perez , D. Maino , N. Mandolesi , M. Maris , F. Marleau , D. J. Marshall , E. Martinez-Gonzalez , S. Masi , M. Massardi , S. Matarrese , P. Mazzotta , S. Mei , A. Melchiorri , J. -B. Melin , L. Mendes , A. Mennella , S. Mitra , M. -A. Miville-Deschaines , A. Moneti , L. Montier , G. Morgante , D. Mortlock , D. Munshi , J. A. Murphy , P. Naselsky , F. Nati , P. Natoli , H. U. Norgaard-Nielsen , F. Noviello , D. Novikov , I. Novikov , S. Osborne , F. Pajot , D. Paoletti , F. Pasian , G. Patanchon , O. Perdereau , L. Perotto , F. Perrotta , F. Piacentini , M. Piat , E. Pierpaoli , R. Piffaretti , S. Plaszczynski , E. Pointecouteau , G. Polenta , N. Ponthieu , L. Popa , T. Poutanen , G. W. Pratt , S. Prunet , J. -L. Puget , J. P. Rachen , W. T. Reach , R. Rebolo , M. Reinecke , M. Remazeilles , C. Renault , S. Ricciardi , T. Riller , I. Ristorcelli , G. Rocha , M. Roman , C. Rosset , M. Rossetti , J. A. Rubino-Martin , B. Rusholme , M. Sandri , G. Savini , D. Scott , G. F. Smoot , J. -L. Starck , R. Sudiwala , R. Sunyaev , D. Sutton , A. -S. Suur-Uski , J. -F. Sygnet , J. A. Tauber , L. Terenzi , L. Toffolatti , M. Tomasi , M. Tristram , J. Tuovinen , L. Valenziano , B. Van Tent , J. Varis , P. Vielva , F. Villa , N. Vittorio , L. A. Wade , B. D. Wandelt , N. Welikala , S. D. M. White , M. White , D. Yvon , A. Zacchei , A. Zonca

Pressure profiles of distant galaxy clusters in the Planck catalog

Successive releases of Planck data have demonstrated the strength of the Sunyaev--Zeldovich (SZ) effect in detecting hot baryons out to the galaxy cluster peripheries. To infer the hot gas pressure structure from nearby galaxy clusters to…

Cosmology and Nongalactic Astrophysics · Physics 2017-07-10 H. Bourdin , P. Mazzotta , A. Kozmanyan , C. Jones , A. Vikhlinin

The pressure profiles of hot gas in local galaxy groups

Recent measurements of the Sunyaev-Zel'dovich (SZ) angular power spectrum from the South Pole Telescope (SPT) and the Atacama Cosmology Telescope (ACT) demonstrate the importance of understanding baryon physics when using the SZ power…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 M. Sun , N. Sehgal , G. M. Voit , M. Donahue , C. Jones , W. Forman , A. Vikhlinin , C. Sarazin

Planck Early Results XI: Calibration of the local galaxy cluster Sunyaev-Zeldovich scaling relations

We present precise Sunyaev-Zeldovich (SZ) effect measurements in the direction of 62 nearby galaxy clusters (z <0.5) detected at high signal-to-noise in the first Planck all-sky dataset. The sample spans approximately a decade in total…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-17 Planck Collaboration , P. A. R. Ade , N. Aghanim , M. Arnaud , M. Ashdown , J. Aumont , C. Baccigalupi , A. Balbi , A. J. Banday , R. B. Barreiro , M. Bartelmann , J. G. Bartlett , E. Battaner , K. Benabed , A. Benoît , J. -P. Bernard , M. Bersanelli , R. Bhatia , J. J. Bock , A. Bonaldi , J. R. Bond , J. Borrill , F. R. Bouchet , H. Bourdin , M. L. Brown , M. Bucher , C. Burigana , P. Cabella , J. -F. Cardoso , A. Catalano , L. Cayón , A. Challinor , A. Chamballu , L. -Y Chiang , C. Chiang , G. Chon , P. R. Christensen , E. Churazov , D. L. Clements , S. Colafrancesco , S. Colombi , F. Couchot , A. Coulais , B. P. Crill , F. Cuttaia , A. Da Silva , H. Dahle , L. Danese , P. de Bernardis , G. de Gasperis , A. de Rosa , G. de Zotti , J. Delabrouille , J. -M. Delouis , F. -X. Désert , J. M. Diego , K. Dolag , S. Donzelli , O. Doré , U. Dörl , M. Douspis , X. Dupac , G. Efstathiou , T. A. Enßlin , F. Finelli , I. Flores , O. Forni , M. Frailis , E. Franceschi , S. Fromenteau , S. Galeotta , K. Ganga , R. T. Génova-Santos , M. Giard , G. Giardino , Y. Giraud-Héraud , J. González-Nuevo , K. M. Górski , S. Gratton , A. Gregorio , A. Gruppuso , D. Harrison , S. Henrot-Versillé , C. Hernández-Monteagudo , D. Herranz , S. R. Hildebrandt , E. Hivon , M. Hobson , W. A. Holmes , W. Hovest , R. J. Hoyland , K. M. Huffenberger , A. H. Jaffe , W. C. Jones , M. Juvela , E. Keihänen , R. Keskitalo , T. S. Kisner , R. Kneissl , L. Knox , H. Kurki-Suonio , G. Lagache , J. -M. Lamarre , J. Lanoux , A. Lasenby , R. J. Laureijs , C. R. Lawrence , S. Leach , R. Leonardi , A. Liddle , P. B. Lilje , M. Linden-Vørnle , M. López-Caniego , P. M. Lubin , J. F. Macías-Pérez , C. J. MacTavish , B. Maffei , D. Maino , N. Mandolesi , R. Mann , M. Maris , F. Marleau , E. Martínez-González , S. Masi , S. Matarrese , F. Matthai , P. Mazzotta , A. Melchiorri , J. -B. Melin , L. Mendes , A. Mennella , S. Mitra , M. -A. Miville-Deschênes , A. Moneti , L. Montier , G. Morgante , D. Mortlock , D. Munshi , A. Murphy , P. Naselsky , P. Natoli , C. B. Netterfield , H. U. Nørgaard-Nielsen , F. Noviello , D. Novikov , I. Novikov , S. Osborne , F. Pajot , F. Pasian , G. Patanchon , O. Perdereau , L. Perotto , F. Perrotta , F. Piacentini , M. Piat , E. Pierpaoli , R. Piffaretti , S. Plaszczynski , E. Pointecouteau , G. Polenta , N. Ponthieu , T. Poutanen , G. W. Pratt , G. Prézeau , S. Prunet , J. -L. Puget , J. P. Rachen , R. Rebolo , M. Reinecke , C. Renault , S. Ricciardi , T. Riller , I. Ristorcelli , G. Rocha , C. Rosset , J. A. Rubiño-Martín , B. Rusholme , M. Sandri , D. Santos , G. Savini , B. M. Schaefer , D. Scott , M. D. Seiffert , P. Shellard , G. F. Smoot , J. -L. Starck , F. Stivoli , V. Stolyarov , R. Sudiwala , R. Sunyaev , J. -F. Sygnet , J. A. Tauber , L. Terenzi , L. Toffolatti , M. Tomasi , J. -P. Torre , M. Tristram , J. Tuovinen , L. Valenziano , L. Vibert , P. Vielva , F. Villa , N. Vittorio , L. A. Wade , B. D. Wandelt , S. D. M. White , M. White , D. Yvon , A. Zacchei , A. Zonca

Missing baryons recovered: a measurement of the gas fraction in galaxies and groups with the kinematic Sunyaev-Zel'dovich effect and CMB lensing

We present new constraints on the halo masses and matter density profiles of DESI galaxy groups by cross-correlating samples of Luminous Red Galaxies (LRGs) and Bright Galaxy Survey (BGS) galaxies with the publicly available CMB lensing…

Cosmology and Nongalactic Astrophysics · Physics 2025-07-21 Boryana Hadzhiyska , Simone Ferraro , Gerrit S. Farren , Noah Sailer , Rongpu Zhou

Sunyaev-Zel'dovich observations of galaxy clusters out to the virial radius with the Arcminute Microkelvin Imager

We present observations using the Small Array of the Arcminute Microkelvin Imager (AMI; 14-18 GHz) of four Abell and three MACS clusters spanning 0.171-0.686 in redshift. We detect Sunyaev-Zel'dovich (SZ) signals in five of these without…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Jonathan T. L. Zwart , Farhan Feroz , Matthew L. Davies , Thomas M. O. Franzen , Keith J. B. Grainge , Michael P. Hobson , Natasha Hurley-Walker , Ruediger Kneissl , Anthony N. Lasenby , Malak Olamaie , Guy G. Pooley , Carmen Rodriguez-Gonzalvez , Richard D. E. Saunders , Anna M. M. Scaife , Paul F. Scott , Timothy W. Shimwell , David J. Titterington , Elizabeth M. Waldram

Direct detection of the kinetic Sunyaev-Zel'dovich effect in galaxy clusters

We report the direct detection of the kinetic Sunyaev-Zel'dovich (kSZ) effect in galaxy clusters with a 3.5 sigma significance level. The measurement was performed by stacking the Planck map at 217 GHz at the positions of galaxy clusters…

Cosmology and Nongalactic Astrophysics · Physics 2021-01-26 Hideki Tanimura , Saleem Zaroubi , Nabila Aghanim

Galaxy Clusters at z>=1: Gas Constraints from the Sunyaev-Zel'dovich Array

We present gas constraints from Sunyaev-Zel'dovich (SZ) effect measurements in a sample of eleven X-ray and infrared (IR) selected galaxy clusters at z >=1, using data from the Sunyaev-Zel'dovich Array (SZA). The cylindrically integrated…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 T. L. Culverhouse , M. Bonamente , E. Bulbul , J. E. Carlstrom , M. B. Gralla , C. Greer , N. Hasler , D. Hawkins , R. Hennessy , N. N. Jetha , M. Joy , J. W. Lamb , E. M. Leitch , D. P. Marrone , A. Miller , T. Mroczkowski , S. Muchovej , C. Pryke , M. Sharp , D. Woody , S. Andreon , B. Maughan , S. A. Stanford

The impact of strong feedback on galaxy group scaling relations

Feedback from active supermassive black holes alters the distribution of matter in the Universe by injecting energy in the neighbouring hot gaseous medium, which leads to ejection of gas from the halos of galaxy groups and massive galaxies.…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-20 D. Eckert , R. Seppi , J. Braspenning , A. Finoguenov , F. Gastaldello , L. Lovisari , E. O'Sullivan , S. Ettori , B. D. Oppenheimer , M. A. Bourne , D. -W. Kim , M. Sun , H. Khalil , G. Gozaliasl , Y. E. Bahar , V. Ghirardini , W. Cui , K. Kolokythas , S. McGee

Bayesian recalibration of Planck galaxy cluster scaling relations including relativistic Sunyaev-Zel'dovich corrections

We investigate the impact of relativistic SZ corrections on Planck measurements of massive galaxy clusters, finding that they have a significant impact at the $\approx$5 -- 15% and up to $\approx 3\sigma$ level. We investigate the…

Cosmology and Nongalactic Astrophysics · Physics 2024-11-21 Yvette C. Perrott

Deep learning for Sunyaev-Zel'dovich detection in Planck

The Planck collaboration has extensively used the six Planck HFI frequency maps to detect the Sunyaev-Zel'dovich (SZ) effect with dedicated methods, e.g., by applying (i) component separation to construct a full sky map of the y parameter…

Cosmology and Nongalactic Astrophysics · Physics 2020-02-12 Victor Bonjean

Hot Extended Galaxy Halos Around Local L* Galaxies From Sunyaev-Zeldovich Measurements

Most of the baryons in L* galaxies are unaccounted for and are predicted to lie in hot gaseous halos (T ~ 3E6 K) that may extend beyond R200. A hot gaseous halo will produce a thermal Sunyaev-Zeldovich signal that is proportional to the…

Astrophysics of Galaxies · Physics 2022-03-30 Joel N. Bregman , Edmund Hodges-Kluck , Zhijie Qu , Cameron Pratt , Jiang-Tao Li , Yansong Yun

Planck intermediate results. XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect

By looking at the kinetic Sunyaev-Zeldovich effect (kSZ) in Planck nominal mission data, we present a significant detection of baryons participating in large-scale bulk flows around central galaxies (CGs) at redshift $z\approx 0.1$. We…

Cosmology and Nongalactic Astrophysics · Physics 2016-02-17 Planck Collaboration , P. A. R. Ade , N. Aghanim , M. Arnaud , M. Ashdown , E. Aubourg , J. Aumont , C. Baccigalupi , A. J. Banday , R. B. Barreiro , N. Bartolo , E. Battaner , K. Benabed , A. Benoit-Lévy , M. Bersanelli , P. Bielewicz , J. J. Bock , A. Bonaldi , L. Bonavera , J. R. Bond , J. Borrill , F. R. Bouchet , C. Burigana , E. Calabrese , J. -F. Cardoso , A. Catalano , A. Chamballu , H. C. Chiang , P. R. Christensen , D. L. Clements , L. P. L. Colombo , C. Combet , B. P. Crill , A. Curto , F. Cuttaia , L. Danese , R. D. Davies , R. J. Davis , P. de Bernardis , G. de Zotti , J. Delabrouille , C. Dickinson , J. M. Diego , K. Dolag , S. Donzelli , O. Doré , M. Douspis , A. Ducout , X. Dupac , G. Efstathiou , F. Elsner , T. A. Enßlin , H. K. Eriksen , F. Finelli , O. Forni , M. Frailis , A. A. Fraisse , E. Franceschi , A. Frejsel , S. Galeotta , S. Galli , K. Ganga , R. T. Génova-Santos , M. Giard , E. Gjerløw , J. González-Nuevo , K. M. Górski , A. Gregorio , A. Gruppuso , F. K. Hansen , D. L. Harrison , S. Henrot-Versillé , C. Hernández-Monteagudo , D. Herranz , S. R. Hildebrandt , E. Hivon , M. Hobson , A. Hornstrup , K. M. Huffenberger , G. Hurier , A. H. Jaffe , T. R. Jaffe , W. C. Jones , M. Juvela , E. Keihänen , R. Keskitalo , F. Kitaura , R. Kneissl , J. Knoche , M. Kunz , H. Kurki-Suonio , G. Lagache , J. -M. Lamarre , A. Lasenby , M. Lattanzi , C. R. Lawrence , R. Leonardi , J. León-Tavares , F. Levrier , M. Liguori , P. B. Lilje , M. Linden-Vørnle , M. López-Caniego , P. M. Lubin , Y. -Z. Ma , J. F. Macías-Pérez , B. Maffei , D. Maino , D. S. Y. Mak , N. Mandolesi , A. Mangilli , M. Maris , P. G. Martin , E. Martínez-González , S. Masi , S. Matarrese , P. McGehee , A. Melchiorri , A. Mennella , M. Migliaccio , M. -A. Miville-Deschênes , A. Moneti , L. Montier , G. Morgante , D. Mortlock , D. Munshi , J. A. Murphy , P. Naselsky , F. Nati , P. Natoli , F. Noviello , D. Novikov , I. Novikov , C. A. Oxborrow , L. Pagano , F. Pajot , D. Paoletti , O. Perdereau , L. Perotto , V. Pettorino , F. Piacentini , M. Piat , E. Pierpaoli , E. Pointecouteau , G. Polenta , N. Ponthieu , G. W. Pratt , J. -L. Puget , S. Puisieux , J. P. Rachen , B. Racine , W. T. Reach , M. Reinecke , M. Remazeilles , C. Renault , A. Renzi , I. Ristorcelli , G. Rocha , C. Rosset , M. Rossetti , G. Roudier , J. A. Rubiño-Martín , B. Rusholme , M. Sandri , D. Santos , M. Savelainen , G. Savini , D. Scott , L. D. Spencer , V. Stolyarov , R. Sudiwala , R. Sunyaev , D. Sutton , A. -S. Suur-Uski , J. -F. Sygnet , J. A. Tauber , L. Terenzi , L. Toffolatti , M. Tomasi , M. Tucci , L. Valenziano , J. Valiviita , B. Van Tent , P. Vielva , F. Villa , L. A. Wade , B. D. Wandelt , W. Wang , I. K. Wehus , D. Yvon , A. Zacchei , A. Zonca

Detection of Hot Gas in Galaxy Groups via the Sunyaev-Zel'dovich Effect

Motivated by the observed shortfall of baryons in the local universe, we investigate the ability of high resolution cosmic microwave background (CMB) experiments to detect hot gas in the outer regions of nearby group halos. We construct hot…

Astrophysics · Physics 2010-01-15 K. Moodley , R. Warne , N. Goheer , H. Trac

Imaging the Thermal and Kinematic Sunyaev-Zel'dovich Effect Signals in a Sample of Ten Massive Galaxy Clusters: Constraints on Internal Velocity Structures and Bulk Velocities

We have imaged the Sunyaev-Zel'dovich (SZ) effect signals at 140 and 270 GHz towards ten galaxy clusters with Bolocam and AzTEC/ASTE. We also used Planck data to constrain the signal at large angular scales, Herschel-SPIRE images to…

Cosmology and Nongalactic Astrophysics · Physics 2019-07-31 Jack Sayers , Alfredo Montaña , Tony Mroczkowski , Grant W. Wilson , Michael Zemcov , Adi Zitrin , Nathália Cibirka , Sunil Golwala , David Hughes , Daisuke Nagai , Erik D. Reese , David Sánchez , John Zuhone

Application of a Self-Similar Pressure Profile to Sunyaev-Zel'dovich Effect Data from Galaxy Clusters

We investigate the utility of a new, self-similar pressure profile for fitting Sunyaev-Zel'dovich (SZ) effect observations of galaxy clusters. Current SZ imaging instruments - such as the Sunyaev-Zel'dovich Array (SZA) - are capable of…

Astrophysics · Physics 2011-02-11 T. Mroczkowski , M. Bonamente , J. E. Carlstrom , T. L. Culverhouse , C. Greer , D. Hawkins , R. Hennessy , M. Joy , J. W. Lamb , E. M. Leitch , M. Loh , B. Maughan , D. P. Marrone , A. Miller , D. Nagai , S. Muchovej , C. Pryke , M. Sharp , D. Woody

Comparison of Pressure Profiles of Massive Relaxed Galaxy Clusters using Sunyaev-Zel'dovich and X-ray Data

We present Sunyaev-Zel'dovich (SZ) effect observations of a sample of 25 massive relaxed galaxy clusters observed with the Sunyaev-Zel'dovich Array (SZA), an 8-element interferometer that is part of the Combined Array for Research in…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Massimiliano Bonamente , Nicole Hasler , Esra Bulbul , John E. Carlstrom , Thomas L. Culverhouse , Megan Gralla , Christopher Greer , David Hawkins , Ryan Hennessy , Marshall Joy , Jeffery Kolodziejczak , James W. Lamb , David Landry , Erik M. Leitch , Daniel P. Marrone , Amber Miller , Tony Mroczkowski , Stephen Muchovej , Thomas Plagge , Clem Pryke , Matthew Sharp , David Woody

A Measurement of the Galaxy Group-Thermal Sunyaev-Zel'dovich Effect Cross-Correlation Function

Stacking cosmic microwave background (CMB) maps around known galaxy clusters and groups provides a powerful probe of the distribution of hot gas in these systems via the Sunyaev-Zel'dovich (SZ) effect. A stacking analysis allows one to…

Cosmology and Nongalactic Astrophysics · Physics 2017-01-18 Vinu Vikram , Adam Lidz , Bhuvnesh Jain

Probing hot gas around luminous red galaxies through the Sunyaev-Zel'dovich effect

We construct the mean thermal Sunyaev-Zel'dovich (tSZ) Comptonization y profile around Luminous Red Galaxies (LRGs) in the redshift range 0.16 < z < 0.47 from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) using the Planck y map.…

Cosmology and Nongalactic Astrophysics · Physics 2019-12-06 Hideki Tanimura , Gary Hinshaw , Ian G. McCarthy , Ludovic Van Waerbeke , Nabila Aghanim , Yin-Zhe Ma , Alexander Mead , Tilman Tröster , Alireza Hojjati , Bruno Moraes

Sunyaev-Zel'dovich Cluster Profiles Measured with the South Pole Telescope

We present Sunyaev-Zel'dovich measurements of 15 massive X-ray selected galaxy clusters obtained with the South Pole Telescope. The Sunyaev-Zel'dovich (SZ) cluster signals are measured at 150 GHz, and concurrent 220 GHz data are used to…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 T. Plagge , B. A. Benson , P. A. R. Ade , K. A. Aird , L. E. Bleem , J. E. Carlstrom , C. L. Chang , H. -M. Cho , T. M. Crawford , A. T. Crites , T. de Haan , M. A. Dobbs , E. M. George , N. R. Hall , N. W. Halverson , G. P. Holder , W. L. Holzapfel , J. D. Hrubes , M. Joy , R. Keisler , L. Knox , A. T. Lee , E. M. Leitch , M. Lueker , D. Marrone , J. J. McMahon , J. Mehl , S. S. Meyer , J. J. Mohr , T. E. Montroy , S. Padin , C. Pryke , C. L. Reichardt , J. E. Ruhl , K. K. Schaffer , L. Shaw , E. Shirokoff , H. G. Spieler , B. Stalder , Z. Staniszewski , A. A. Stark , K. Vanderlinde , J. D. Vieira , R. Williamson , O. Zahn