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Marcelo Alvarez

Postdoctoral Fellow
Canadian Institute for Theoretical Astrophysics
research interests: computational cosmology; first stars and black holes; reionization; 21-cm observations of the EOR; galaxy formation; physics of the IGM; large-scale structure of the universe

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send questions, comments, or requests to:
malvarez 'at' cita.utoronto.ca



Poster showing different aspects of reionization.

Poster by M. Alvarez
Background visualization by M. Alvarez and T. Abel
See Alvarez et al. (2009) for more details.



Shows the vast range of length scales involved in the process of reionization. On the left is shown the result of a large scale semi-numerical calculation of reionization, while right panels show the result of a small scale calculations on much smaller scales, with a relatively dim flux as would occur when a patch is just beginning to be reionized (top-right), and a much higher flux as would occur near a number of bright galaxies (bottom-right).

Large scale (left) visualization by M. Alvarez, R. Kaehler, and T. Abel
Small scale (right) visualization by J. Emberson and M. Alvarez
Large scale (left) simulation by M. Alvarez and T. Abel
Small scale (right) simulation by J. Emberson, R. Thomas, and M. Alvarez




left: Reionization redshift in a 0.5 Mpc/h-thick slice for a reionization simulation with a mean free path of 256 Mpc/h (top) and 8 Mpc/h (bottom). Clockwise beginning from top-left, regions shown are 2 Gpc/h, 500 Mpc/h, and 125 Mpc/h across. The radii of the circles correspond to the photon mean free path. right: Same as left panels but for the projected ionized fraction in a 5 Mpc/h-thick slice at a time when the mean volume-weighted ionized fraction is 0.75. Note that the ionization field contains considerably more small scale structure in the 8 Mpc/h mean free path case.

Visualization by M. Alvarez and T. Abel
See Alvarez & Abel (2010) for more details.



Story published in Discover Magazine, December 2009 Issue

Visualization by M. Alvarez and T. Abel
Simulation by M. Alvarez, J. Wise, and T. Abel
See Alvarez, Wise & Abel (2009) for more details.

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Mailing address:

CITA
60 St. George St.
Toronto ON M5S 3H8
Canada

Office and Contact Info:

McLennan Physical Laboratories, Room 1302
Tel: 416 978 8801
Fax: 416 978 3921
E-mail: malvarez 'at' cita.utoronto.ca