Kazushi Iwasawa

Universitat de Barcelona

Experimental Sciences & Mathematics

Born and educated in Japan. After obtaining his PhD in astrophysics at Nagoya University, Nagoya, Japan, in 1995, he moved to Europe, working at the Institute of Astronomy, Cambridge in UK (1995-2005), at the Max Planck Institut für Extraterrestrische Physik in Germany (2005-2008), and at INAF-Osservatorio Astronomico di Bologna in Italy (2008-2009). In 2010 he joined ICREA, to work as an ICREA Research Professor at the Institut de Ciències del Cosmos (ICCUB). His main research area is X-ray astronomy on active galaxies and cosmic black holes.

Research interests

Kazushi Iwasawa works in the field of observational astronomy, mainly using X-ray observatories in space. His primary interest is in the formation and evolution of supermassive black holes powering active galaxies. These active galaxies are generally strong X-ray emitters, which makes X-ray observations a powerful probe of black hole activity even at great cosmological distances. He is involved in several multi-wavelength survey projects which attempt to establish cosmic evolution of the black hole activity and its relation to the galaxy formation. Currently most active collaborations include Great Observatories All-sky LIRG Survey (GOALS), for investigating the thema through the aspect of galaxy mergers, and the Subaru HyperSuprime Cam (HSC) survey, focusing on high redshift quasars. He is also interested in observational study of relativistic effects operating at region close to the black hole in active galaxies through X-ray spectroscopy.

Selected publications

- Ricci C, Bauer FE, Treister E, Schawinski K, Privon GC, Blecha L, Arevalo P, Armus L, Harrison F, Ho LC, Iwasawa K, Sanders DB & Stern D 2017, 'Growing supermassive black holes in the late stages of galaxy mergers are heavily obscured', Monthly Noctices of the Royal Astronomical Society, 468, 1273.

- Ribó M, Munar-Adrover P, Paredes JM, Marcote B, Iwasawa K, Moldón J, Casares J, Migliari S & Paredes-Fortuny X 2017, 'The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656', Astrophysical Journal Letters, 835, L33.

- Iwasawa K, Spoon HWW, Comastri A, Gilli R, Lanzuisi G, Piconcelli E, Vignali C, Brusa M & Puccetti S 2017, 'The active nucleus of the ULIRG IRAS F00183-7111 viewed by NuSTAR', Astronomy and Astrophysics, 66, A117.

- Diaz-Santos T, Armus L, Charmandaris V, Lu N, Stierwalt S, Stacey G, Malhotra S, van der Werf PP, Howell JH, Privon GC, Mazzarella JM, Goldsmith PF, Murphy EJ, Barcos-Munoz L, Linden ST, Inami H, Larson L, Evans AS, Appleton P, Iwasawa K, Lord S, Sanders DB & Surace JA 2017, 'A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies', Astrophysical Journal, 846, 1, 32.

Selected research activities

Invited to the Sesto Workshop (on observations of gravitational effects of black holes) and the Lorentz Center Workshop: The Quest for Multiple Supermassive Black Holes. Telescope observing times were awarded for programs of XMM-Newton and of GTC 2017A as a PI and other programs in ALMA Cycle 5, WHT 2017A, Chandra Cycle 19 as a co-I. There was a press release by NASA (https://www.nasa.gov/feature/jpl/merging-galaxies-have-enshrouded-black-holes), related to the publication (Ricci et al above).