An international team of astronomers used the Atacama Large (Sub) Millimeter Array (ALMA) to explore the farthest part of the universe revealed by the Ultra Deep Field of the Hubble satellite (HUDF). These new observations from ALMA are significantly deeper and more resolved than previous surveys in the millimeter range. They clearly demonstrate the existence of a close relationship between the star formation rate in young galaxies and their total stellar mass. They also reveal the abundance and spatial distribution of the gas from which stars are born, providing new insight into this "Golden Age" of galactic formation dated some 10 billion years.
New observational results from ALMA will be published in a series of articles in press in the Astrophysical Journal and the Monthly Notices of the Royal Astronomical Society. They are also unveiled at the conference "Five Years ALMA : Half a Decade of ALMA: Cosmic Dawns Transformed", held this week in Palm Springs, California, USA.
For more information : see the French version