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Webinar: The CYGNUS Models for the Spectral Energy Distributions of Galaxies and their Supermassive Black Holes

Event Details:

  • Date:          Tuesday, 20 April 2021
  • Time:         Starts: 16:00
  • Venue:       Live streaming of the discussion will be available on Zoom (Password: VsSCz1).
  • Speaker:   Prof. Andreas Efstathiou, European University Cyprus

CyI Logo     CaSToRC HPC

 CaSToRC, the HPC National Competence Centre,
 invites you to the EuroCC and SimEA Online Seminar Series

The webinar will be in English and the live stream is open to the public.
Live streaming of the discussion will be available on Zoom (Password: VsSCz1).
Images and/or recordings of our open public events may be used by The Cyprus Institute for dissemination purposes including print and digital media such as websites, press-releases, social media, and live streaming.




One of the most important and challenging areas of research in modern Astrophysics concerns the study of the sequence of events that led to the formation of galaxies and the supermassive black holes that usually reside at their centres. Understanding of the complex astrophysics that led to the observed distribution of galaxies, both in terms of properties and numbers, is usually sought within the framework of the standard ΛCDM (Lambda Cold Dark Matter) cosmological model.  

Radiative transfer models for galaxies and active galactic nuclei (AGN) are now routinely used for interpreting multi-wavelength observations of galaxies and are increasingly being incorporated into models of galaxy formation and evolution. CYGNUS (CYprus models for Galaxies and their NUclear Spectra) is a collection of radiative transfer models for AGN tori, starburst galaxies and host galaxies.

In this talk, ongoing work funded by the European Space Agency under the PECS program and making use of the CYCLONE facility will be described.  The project aims to develop further the CYGNUS collection of models, develop a new method for fitting them to data using a Markov Chain Monte Carlo (MCMC) code and test the method with a large sample of galaxies with excellent photometry and infrared spectrophotometry from the Spitzer Space Telescope. Numerous recent applications of the CYGNUS models as well as prospects for applications with forthcoming missions such as the James Webb Space Telescope (due for launch in late 2021) will be discussed.

About the Speaker

Andreas EfstathiouProf. Andreas Efstathiou
Andreas Efstathiou was educated at Queen Mary, University of London. He held positions at Queen Mary & Westfield College (1989-1992), University of Hertfordshire (1992-1995) and Imperial College London (1995-2001) before joining Cyprus College which evolved into European University Cyprus (EUC).

He has published more than 100 papers (h-index 45) in refereed journals and 30 papers in conference proceedings. His research interests lie in the area of infrared astronomy and cosmology, galaxy formation and evolution, star formation and active galactic nuclei. He has done pioneering work on radiative transfer modelling of the spectral energy distributions of galaxies and has developed models for the emission of almost every type of galaxy over their complete spectrum. His models have also been used for the interpretation of galaxies discovered in a number of extragalactic surveys (IRAS, ELAIS, FIRBACK, SWIRE, AKARI, SCUBA, SHADES, HerMES, Planck, WISE, ALMA).

He participated in extragalactic surveys with the Infrared Space Observatory (ISO), the Spitzer Space Telescope and the submillimetre camera SCUBA. He is currently involved in the scientific exploitation of surveys with the Herschel Space Observatory and a survey that searches for highly extinguished supernovae and tidal disruption events in luminous infrared galaxies using adaptive optics on 10-meter class telescopes. He also continues his work on radiative transfer modelling of galaxies.

In the period 2005-2008 he was chairman of the Department of Computer Science and Engineering and in the period 2011-2014 he was Deputy Dean of the School of Sciences. He is currently Vice Rector of Research and External Affairs and Secretary of the Cyprus Research and Innovation Foundation.


Download the Spring 2021 Online EuroCC & SimEA Seminar Series Programme here.

EuroCC Simea Seminar Series 2


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Additional Info

  • Date: Tuesday, 20 April 2021
  • Time: Starts: 16:00
  • Speaker: Prof. Andreas Efstathiou, European University Cyprus

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