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91̽»¨
Black Hole

Lensing of space time around a black hole. At 91̽»¨ we study black holes observationally and theoretically on all size and time scales - it is some of our core work.

Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES.

Prof. Dimitra Rigopoulou

Professor of Astrophysics

Research theme

  • Astronomy and astrophysics

Sub department

  • Astrophysics

Research groups

  • Galaxy formation and evolution
Dimitra.Rigopoulou@physics.ox.ac.uk
Telephone: 01865 (2)73296
Denys Wilkinson Building, room 75419514947
  • About
  • Research
  • Publications

Local Luminous Infrared Galaxies. II. AGN Activity from Spitzer/IRS spectra

(2011)

Authors:

Almudena Alonso-Herrero, Miguel Pereira-Santaella, George H Rieke, Dimitra Rigopoulou

GOODS-Herschel~: Gas-to-dust mass ratios and CO-to-H_2 conversion factors in normal and starbursting galaxies at high-z

(2011)

Authors:

Georgios E Magdis, E Daddi, E Elbaz, M Sargent, M Dickinson, H Dannerbauer, H Aussel, F Walter, HS Hwang, V Charmandaris, J Hodge, D Riechers, D Rigopoulou, C Carilli, M Pannella, J Mullaney, R Leiton, D Scott

Physical conditions of the interstellar medium of high-redshift, strongly lensed submillimetre galaxies from the Herschel-ATLAS*

Monthly Notices of the Royal Astronomical Society 91̽»¨ University Press (OUP) 415:4 (2011) 3473-3484

Authors:

I Valtchanov, J Virdee, RJ Ivison, B Swinyard, P van der Werf, D Rigopoulou, E da Cunha, R Lupu, DJ Benford, D Riechers, Ian Smail, M Jarvis, C Pearson, H Gomez, R Hopwood, B Altieri, M Birkinshaw, D Coia, L Conversi, A Cooray, G De Zotti, L Dunne, D Frayer, L Leeuw, A Marston, M Negrello, M Sanchez Portal, D Scott, MA Thompson, M Vaccari, M Baes, D Clements, MJ Michałowski, H Dannerbauer, S Serjeant, R Auld, S Buttiglione, A Cava, A Dariush, S Dye, S Eales, J Fritz, E Ibar, S Maddox, E Pascale, M Pohlen, E Rigby, G Rodighiero, DJB Smith, P Temi, J Carpenter, A Bolatto, M Gurwell, JD Vieira

GOODS-Herschel A population of 24micron dropout sources at z < 2

(2011)

Authors:

Georgios E Magdis, D Elbaz, M Dickinson, HS Hwang, V Charmandaris, L Armus, E Daddi, E Le Floc'h, H Aussel, H Dannerbauer, D Rigopoulou, V Buat, G Morrison, J Mullaney, D Lutz, D Scott, D Coia, A Pope, M Pannella, B Altieri1, D Burgarella, M Bethermin, K Dasyra, J Kartaltepe, R Leiton, B Magnelli, P Popesso, I Valtchanov

HerMES: Lyman break galaxies individually detected at 0.7 ≤ z ≤ 2.0 in goods-N with herschel/spire

Astrophysical Journal Letters 734:1 PART 2 (2011)

Authors:

D Burgarella, S Heinis, G Magdis, R Auld, A Blain, J Bock, D Brisbin, V Buat, P Chanial, DL Clements, A Cooray, S Eales, A Franceschini, E Giovannoli, J Glenn, EA Gonzlez Solares, M Griffin, HS Hwang, O Ilbert, L Marchetti, AMJ Mortier, SJ Oliver, MJ Page, A Papageorgiou, CP Pearson, I Pérez-Fournon, M Pohlen, JI Rawlings, G Raymond, D Rigopoulou, G Rodighiero, IG Roseboom, M Rowan-Robinson, D Scott, N Seymour, AJ Smith, M Symeonidis, KE Tugwell, M Vaccari, JD Vieira, M Viero, L Vigroux, L Wang, G Wright

Abstract:

As part of the Herschel Multi-tiered Extragalactic Survey we have investigated the rest-frame far-infrared (FIR) properties of a sample of more than 4800 Lyman break galaxies (LBGs) in the Great Observatories Origins Deep Survey North field. Most LBGs are not detected individually, but we do detect a sub-sample of 12 objects at 0.7 < z < 1.6 and one object at z = 2.0. The ones detected by Herschel SPIRE have redder observed NUV - U and U - R colors than the others, while the undetected ones have colors consistent with average LBGs at z > 2.5. The UV-to-FIR spectral energy distributions of the objects detected in the rest-frame FIR are investigated using the code CIGALE to estimate physical parameters. We find that LBGs detected by SPIRE are high-mass, luminous infrared galaxies. It appears that LBGs are located in a triangle-shaped region in the A FUV versus log L FUV = 0 diagram limited by A FUV = 0 at the bottom and by a diagonal following the temporal evolution of the most massive galaxies from the bottom right to the top left of the diagram. This upper envelop can be used as upper limits for the UV dust attenuation as a function of L FUV. The limits of this region are well explained using a closed-box model, where the chemical evolution of galaxies produces metals, which in turn lead to higher dust attenuation when the galaxies age. © 2011. The American Astronomical Society. All rights reserved.

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