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Black Hole

Lensing of space time around a black hole. At Oxford 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
  • Publications

The suppression of star formation by powerful active galactic nuclei.

Nature 485:7397 (2012) 213-216

Authors:

MJ Page, M Symeonidis, JD Vieira, B Altieri, A Amblard, V Arumugam, H Aussel, T Babbedge, A Blain, J Bock, A Boselli, V Buat, N Castro-Rodríguez, A Cava, P Chanial, DL Clements, A Conley, L Conversi, A Cooray, CD Dowell, EN Dubois, JS Dunlop, E Dwek, S Dye, S Eales, D Elbaz, D Farrah, M Fox, A Franceschini, W Gear, J Glenn, M Griffin, M Halpern, E Hatziminaoglou, E Ibar, K Isaak, RJ Ivison, G Lagache, L Levenson, N Lu, S Madden, B Maffei, G Mainetti, L Marchetti, HT Nguyen, B O'Halloran, SJ Oliver, A Omont, P Panuzzo, A Papageorgiou, CP Pearson, I Pérez-Fournon, M Pohlen, JI Rawlings, D Rigopoulou, L Riguccini, D Rizzo, G Rodighiero, IG Roseboom, M Rowan-Robinson, M Sánchez Portal, B Schulz, D Scott, N Seymour, DL Shupe, AJ Smith, JA Stevens, M Trichas, KE Tugwell, M Vaccari, I Valtchanov, M Viero, L Vigroux, L Wang, R Ward, G Wright, CK Xu, M Zemcov

Abstract:

The old, red stars that constitute the bulges of galaxies, and the massive black holes at their centres, are the relics of a period in cosmic history when galaxies formed stars at remarkable rates and active galactic nuclei (AGN) shone brightly as a result of accretion onto black holes. It is widely suspected, but unproved, that the tight correlation between the mass of the black hole and the mass of the stellar bulge results from the AGN quenching the surrounding star formation as it approaches its peak luminosity. X-rays trace emission from AGN unambiguously, whereas powerful star-forming galaxies are usually dust-obscured and are brightest at infrared and submillimetre wavelengths. Here we report submillimetre and X-ray observations that show that rapid star formation was common in the host galaxies of AGN when the Universe was 2-6 billion years old, but that the most vigorous star formation is not observed around black holes above an X-ray luminosity of 10(44) ergs per second. This suppression of star formation in the host galaxy of a powerful AGN is a key prediction of models in which the AGN drives an outflow, expelling the interstellar medium of its host and transforming the galaxy's properties in a brief period of cosmic time.
More details from the publisher
More details

The suppression of star formation by powerful active galactic nuclei

Nature 485:7397 (2012) 213-216

Authors:

MJ Page, M Symeonidis, JD Vieira, B Altieri, A Amblard, V Arumugam, H Aussel, T Babbedge, A Blain, J Bock, A Boselli, V Buat, N Castro-Rodrñguez, A Cava, P Chanial, DL Clements, A Conley, L Conversi, A Cooray, CD Dowell, EN Dubois, JS Dunlop, E Dwek, S Dye, E Eales, D Elbaz, D Farrah, M Fox, A Franceschini, G Gear, J Glenn, M Griffin, M Halpern, E Hatziminaoglou, E Ibar, K Isaak, RJ Ivison, G Lagache, L Levenson, N Lu, S Madden, B Maffei, G Mainetti, L Marchetti, HT Nguyen, B O’halloran, SJ Oliver, A Omont, P Panuzzo, A Papageorgiou, CP Pearson, I Pérez-Fournon, M Pohlen, JI Rawlings, D Rigopoulou, L Riguccini, D Rizzo, G Rodighiero, IG Roseboom, M Rowan-Robinson, MS Portal, B Schulz, D Scott, N Seymour, DL Shupe, AJ Smith, JA Stevens, M Trichas, KE Tugwell, M Vaccari, I Valtchanov, M Viero, L Vigroux, L Wang, R Ward, G Wright, CK Xu, M Zemcov

Abstract:

The old, red stars that constitute the bulges of galaxies, and the massive black holes at their centres, are the relics of a period in cosmic history when galaxies formed stars at remarkable rates and active galactic nuclei (AGN) shone brightly as a result of accretion onto black holes. It is widely suspected, but unproved, that the tight correlation between the mass of the black hole and the mass of the stellar bulge results from the AGN quenching the surrounding star formation as it approaches its peak luminosity. X-rays trace emission from AGN unambiguously, whereas powerful star-forming galaxies are usually dust-obscured and are brightest at infrared and submillimetre wavelengths. Here we report submillimetre and X-ray observations that show that rapid star formation was common in the host galaxies of AGN when the Universe was 2-6 billion years old, but that the most vigorous star formation is not observed around black holes above an X-ray luminosity of 1044 ergs per second. This suppression of star formation in the host galaxy of a powerful AGN is a key prediction of models in which the AGN drives an outflow, expelling the interstellar medium of its host and transforming the galaxy’s properties in a brief period of cosmic time. © 2012 Macmillan Publishers Limited.
More details from the publisher

A Population of Dust-Rich Quasars at z ~ 1.5

(2012)

Authors:

Y Sophia Dai, Jacqueline Bergeron, Martin Elvis, Alain Omont, Jia-Sheng Huang, Jamie Bock, Asantha Cooray, Giovanni Fazio, Evanthia Hatziminaoglou, Edo Ibar, Georgios E Magdis, Seb J Oliver, Mathew J Page, Ismael Perez-Fournon, Dimitra Rigopoulou, Isaac G Roseboom, Douglas Scott, Myrto Symeonidis, Markos Trichas, Joaquin D Vieira, Christopher NA Willmer, Michael Zemcov
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The Herschel Multi-tiered Extragalactic Survey: HerMES

(2012)

Authors:

HerMES Collaboration, SJ Oliver, J Bock, B Altieri, A Amblard, V Arumugam, H Aussel, T Babbedge, A Beelen, M Béthermin, A Blain, A Boselli, C Bridge, D Brisbin, V Buat, D Burgarella, N Castro-Rodríguez, A Cava, P Chanial, M Cirasuolo, DL Clements, A Conley, L Conversi, A Cooray, CD Dowell, EN Dubois, E Dwek, S Dye, S Eales, D Elbaz, D Farrah, A Feltre, P Ferrero, N Fiolet, M Fox, A Franceschini, W Gear, E Giovannoli, J Glenn, Y Gong, EA González Solares, M Griffin, M Halpern, M Harwit, E Hatziminaoglou, S Heinis, P Hurley, HS Hwang, A Hyde, E Ibar, O Ilbert, K Isaak, RJ Ivison, G Lagache, E Le Floc'h, L Levenson, B Lo Faro, N Lu, S Madden, B Maffei, G Magdis, G Mainetti, L Marchetti, G Marsden, J Marshall, AMJ Mortier, HT Nguyen, B O'Halloran, A Omont, MJ Page, P Panuzzo, A Papageorgiou, H Patel, CP Pearson, I Pérez-Fournon, M Pohlen, JI Rawlings, G Raymond, D Rigopoulou, L Riguccini, D Rizzo, G Rodighiero, IG Roseboom, M Rowan-Robinson, M Sánchez Portal, B Schulz, Douglas Scott, N Seymour, DL Shupe, AJ Smith, JA Stevens, M Symeonidis, M Trichas, KE Tugwell, M Vaccari, I Valtchanov, JD Vieira, M Viero, L Vigroux, L Wang, R Ward, J Wardlow, G Wright, CK Xu, M Zemcov
More details from the publisher

HerMES: deep number counts at 250, 350, and 500 microns in the COSMOS and GOODS-N fields and the build-up of the cosmic infrared background

(2012)

Authors:

M Béthermin, E Le Floc'h, O Ilbert, A Conley, G Lagache, A Amblard, V Arumugam, H Aussel, S Berta, J Bock, A Boselli, V Buat, CM Casey, N Castro-Rodríguez, A Cava, DL Clements, A Cooray, CD Dowell, S Eales, D Farrah, A Franceschini, J Glenn, M Griffin, E Hatziminaoglou, S Heinis, E Ibar, RJ Ivison, JS Kartaltepe, L Levenson, G Magdis, L Marchetti, G Marsden, HT Nguyen, B O'Halloran, SJ Oliver, A Omont, MJ Page, P Panuzzo, A Papageorgiou, CP Pearson, I Pérez-Fournon, M Pohlen, D Rigopoulou, IG Roseboom, M Rowan-Robinson, M Salvato, B Schulz, Douglas Scott, N Seymour, DL Shupe, AJ Smith, M Symeonidis, M Trichas, KE Tugwell, M Vaccari, I Valtchanov, JD Vieira, M Viero, L Wang, CK Xu, M Zemcov
More details from the publisher

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