Daniel Nadeau

Tenured Professor


Département de physique
Université de Montréal
C.P. 6128, Succursale Centre-Ville
Montréal, QC
Canada   H3C 3J7

Phone : 514-343-6676
Fax : 514-343-2071
Email : daniel.nadeau (AT) astro (DOT) umontreal (DOT) ca
Office : B-440

CRAQ web page
UdeM Physics web page

    Infrared astronomy, at wavelengths greater than 1 micrometer, is the predilection method for observing a) objects whose surface temperature is lower than 3000 K, such as forming stars, brown dwarfs, or planets, b) dust grains and H2, CO, CH4, etc. emitting in the interstellar and circumstellar environments, and c) sources which, at visible wavelengths, are hidden by interstellar dust from star formation regions and the Galactic plane. Furthermore, hundreds of galaxies emit more than 95% of their radiation in the infrared. To approach this vast research domain, we have developed for more than 30 years an infrared astronomy program at Université de Montréal, which includes the construction of cameras and spectrometers for the Observatoire du Mont-Mégantic and Canada-France-Hawaï Telescope. This led us among others to the study of H2 excited by star forming regions' supersonic jets, effects of gravitational microlensing on multiple images of a quasar, and the environment of close-by stars to uncover planetary-mass companions. Since recent years, our research was focussed on detection, identification and the study of brown dwarfs, these objects with a mass greater than that of the planets, which allows them to perform nuclear burning of deuterium, but smaller than that of the stars, which condemns them to gradually cool over time, unable to benefit from the long-term stability provided by the nucleosynthesis of helium.

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