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91探花
Black Hole

Lensing of space time around a black hole. At 91探花 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

The Herschel PEP/HerMES Luminosity Function. I: Probing the Evolution of PACS selected Galaxies to z~4

(2013)

Authors:

C Gruppioni, F Pozzi, G Rodighiero, I Delvecchio, S Berta, L Pozzetti, G Zamorani, P Andreani, A Cimatti, O Ilbert, E Le Floch, D Lutz, B Magnelli, L Marchetti, P Monaco, R Nordon, S Oliver, P Popesso, L Riguccini, I Roseboom, DJ Rosario, M Sargent, M Vaccari, B Altieri, H Aussel, A Bongiovanni, J Cepa, E Daddi, H Dominguez-Sanchez, D Elbaz, N Forster-Schreiber, R Genzel, A Iribarrem, M Magliocchetti, R Maiolino, A Poglitsch, A Perez Garcia, M Sanchez-Portal, E Sturm, L Tacconi, I Valtchanov, A Amblard, V Arumugam, M Bethermin, J Bock, A Boselli, V Buat, D Burgarella, N Castro-Rodriguez, A Cava, P Chanial, DL Clements, A Conley, A Cooray, CD Dowell, E Dwek, S Eales, A Franceschini, J Glenn, M Griffin, E Hatziminaoglou, E Ibar, K Isaak, RJ Ivison, G Lagache, L Levenson, N Lu, S Madden, B Maffei, G Mainetti, HT Nguyen, BO Halloran, MJ Page, P Panuzzo, A Papageorgiou, CP Pearson, I Perez-Fournon, M Pohlen, D Rigopoulou, M Rowan-Robinson, B Schulz, D Scott, N Seymour, DL Shupe, AJ Smith, JA Stevens, M Symeonidis, M Trichas, KE Tugwell, L Vigroux, L Wang, G Wright, CK Xu, M Zemcov, S Bardelli, M Carollo, T Contini, O Le Fevre, S Lilly, V Mainieri, A Renzini, M Scodeggio, E Zucca

The Herschel census of infrared SEDs through cosmic time

(2013)

Authors:

Myrto Symeonidis, M Vaccari, S Berta, MJ Page, D Lutz, V Arumugam, H Aussel, J Bock, A Boselli, V Buat, PL Capak, DL Clements, A Conley, L Conversi, A Cooray, CD Dowell, D Farrah, A Franceschini, E Giovannoli, J Glenn, M Griffin, E Hatziminaoglou, H-S Hwang, E Ibar, O Ilbert, RJ Ivison, E Le Floc'h, S Lilly, JS Kartaltepe, B Magnelli, G Magdis, L Marchetti, HT Nguyen, R Nordon, B O'Halloran, SJ Oliver, A Omont, A Papageorgiou, H Patel, CP Pearson, I Perez-Fournon, M Pohlen, P Popesso, F Pozzi, D Rigopoulou, L Riguccini, D Rosario, IG Roseboom, M Rowan-Robinson, M Salvato, B Schulz, Douglas Scott, N Seymour, DL Shupe, AJ Smith, I Valtchanov, L Wang, CK Xu, M Zemcov, S Wuyts

Local Luminous Infrared Galaxies. III. Co-evolution of Black Hole Growth and Star Formation Activity?

(2013)

Authors:

Almudena Alonso-Herrero, Miguel Pereira-Santaella, George H Rieke, Aleksandar M Diamond-Stanic, Yiping Wang, Antonio Hernan-Caballero, Dimitra Rigopoulou

The complex physics of dusty star-forming galaxies at high redshifts as revealed by herschel and Spitzer

Astrophysical Journal 762:2 (2013)

Authors:

B Lo Faro, A Franceschini, M Vaccari, L Silva, G Rodighiero, S Berta, J Bock, D Burgarella, V Buat, A Cava, DL Clements, A Cooray, D Farrah, A Feltre, EAG Solares, P Hurley, D Lutz, G Magdis, B Magnelli, L Marchetti, SJ Oliver, MJ Page, P Popesso, F Pozzi, D Rigopoulou, M Rowan-Robinson, IG Roseboom, D Scott, AJ Smith, M Symeonidis, L Wang, S Wuyts

Abstract:

We combine far-infrared photometry from Herschel (PEP/HerMES) with deep mid-infrared spectroscopy from Spitzer to investigate the nature and the mass assembly history of a sample of 31 luminous and ultraluminous infrared galaxies ((U)LIRGs) at z &thk 1 and 2 selected in GOODS-S with 24 渭m fluxes between 0.2 and 0.5 mJy. We model the data with a self-consistent physical model (GRASIL) which includes a state-of-the-art treatment of dust extinction and reprocessing. We find that all of our galaxies appear to require massive populations of old (>1 Gyr) stars and, at the same time, to host a moderate ongoing activity of star formation (SFR 鈮 100M yr-1). The bulk of the stars appear to have been formed a few Gyr before the observation in essentially all cases. Only five galaxies of the sample require a recent starburst superimposed on a quiescent star formation history. We also find discrepancies between our results and those based on optical-only spectral energy distribution (SED) fitting for the same objects; by fitting their observed SEDs with our physical model we find higher extinctions (by 螖AV &thk 0.81 and 1.14) and higher stellar masses (by 螖log(M) &thk 0.16 and 0.36 dex) for z &thk 1 and z &thk 2 (U)LIRGs, respectively. The stellar mass difference is larger for the most dust-obscured objects. We also find lower SFRs than those computed from LIR using the Kennicutt relation due to the significant contribution to the dust heating by intermediate-age stellar populations through "cirrus" emission (&thk73% and &thk66% of the total LIR for z &thk 1 and z &thk 2 (U)LIRGs, respectively). 漏 2013. The American Astronomical Society. All rights reserved..

Erratum to The herschel* pep/hermes luminosity function - i. probing the evolution of PACS selected galaxies to z 虄 4 [MNRAS 436, (2013) 2875-2876]

Monthly Notices of the Royal Astronomical Society 436:3 (2013) 2875-2876

Authors:

C Gruppioni, F Pozzi, G Rodighiero, I Delvecchio, S Berta, L Pozzetti, G Zamorani, P Andreani, A Cimatti, O Ilbert, E Le Floc'h, D Lutz, B Magnelli, L Marchetti, L Monaco, R Nordon, S Oliver, P Popesso, L Riguccini, I Roseboom, DJ Rosario, M Sargent, M Vaccari, B Altieri, H Aussel, A Bongiovanni, J Cepa, E Daddi, H Do岣縧nguez-艢anchez, D Elbaz, N F虉orster Schreiber, R Genzel, A Iribarrem, M Magliocchetti, R Maiolino, A Poglitsch, A 峁攅rez Gar膰la, M Sanchez-Portal, E Sturm, L Tacconi, I Valtchanov, A Amblard, V Arumugam, M Bethermin, J Bock, A Boselli, V Buat, D Burgarella, N Castro-Rod艜lguez, A Cava, P Chania, DL Clements, A Conley, A Cooray, CD Dowell, E Dwek, S Eales, A Franceschini, J Glenn, M Griffin, E Hatziminaoglou, E Ibar, K Isaak, RJ Ivison, G Lagache, L Levenson, N Lu, S Madden, B Maffei, G Mainetti, HT Nguyen, B O'Halloran, MJ Page, P Panuzzo, A Papageorgiou, CP Pearson, I 峁攅rez-Fournon, M Pohlen, D Rigopoulou, M Rowan-Robinson, B Schulz, D Scott, N Seymour, DL Shupe, AJ Smith, JA Stevens, M Symeonidis, M Trichas, KE Tugwell, L Vigroux, L Wang, G Wright, CK Xu, M Zemcov, S Bardelli, M Carollo, T Contini, O Le F虂evre, S Lilly, V Mainieri

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