Present Position: Senior Staff AstronomerACADEMIC POSITIONS 2021-23 Ascription to the IAA 1999-21 Senior Staff Astronomer, IAC 1994-99 GTC 10m Project Scientist, Tenerife, Spain 1991-94 Head, Research Division, IAC, Tenerife, Spain 1989-91 Research Staff Astronomer, IAC, Tenerife, Spain 1987-89 Assoc. Professor (Tenured), U. Complutense, Madrid, Spain 1985-87 Scientific Fellow, European Southern Observatory, Germany 1983-85 Fullbright Scholar, U. of California San Diego, USA 1983-84 Physics Instructor, San Diego Mesa College, San Diego, USA 1979-83 Research Assistant, U. of California San Diego, USA 1977-79 del Amo Foundation Fellow, U. of California San Diego, USA 1976-77 Teaching Assistant, U. Complutense, Madrid, Spain RESEARCH ACTIVITIES More than 150 research papers and invited lectures in Astrophysics Main areas of interest: Active Galaxies, Star-formation in galaxies, Instrumentation, The high-z Universe PI of a Consolider-Ingenio grant “First Science with the GTC” (5.5M€, MICINN, Spain) Co-Investigator of ISOPHOT, a space instrument flown by the Infrared Space Observatory (ISO). Editor, Instrumentation for Large Telescopes, 1997 Cambridge Univ. Press
Title of Talk I
“ Scientific: Two ionized bubbles before re-ionsation”
First explain that the Universe is reionised and why. I will then explain a new method to measure the sizes of smoothly evolving ionised bubbles at the epoch of reionisation, using the ionising continuum photons (assuming they are emitted by galaxies) and the mean cosmic density, which is a function of the redshift. I will derive two ionised bubbles one at redshift 6.5, and another one at redshift 7.1.
I will then show a method to compute the radius of ionized bubbles that can be used for individual sources and for proto-clusters. I will compare our method with other methods often used in the literature. Specially the method used by Yajima (2018) that it is commonly used. I will also explain why this later method gives very close results. Finally I will compare our method with other methods that have recently appeared in the literature. In particular, I will show that the method derived by Endsley and Stark (2022) gives very different results than other methods. In particular, this method has several parameters that are left to the user, thus not constrained by usual parameters.
Title of Talk II
“ IAU. The IUA is more than the eye sees”
"how the IAU works, and how the IAU is organized as well as its activities”