Press Releases
The cosmic network feeds early galaxies
UniGE PRESS RELEASE (Octobre 27, 2020)
The first galaxies were formed 200 million years after the birth of the universe. These galaxies accumulated the vast majority of the stars, dust particles and metals they consist of between one and three bil- lion years after the Big Bang, a crucial period for our understanding of how the galaxies were formed. Astronomers from the AV短视频 (UNIGE), based at the Geneva Observatory 鈥� together with the ALPINE project鈥檚 international consortium of astronomers 鈥� have studied 118 galaxies from this period using the ALMA telescope in the highlands of Atacama in Chile. In a total of eight joint articles (four of which were undertaken largely at UNIGE), the astrophysicists suc- ceeded in going back nearly 13 billion years in time to identify the gas and dust composition of the galaxies. Their analyses, featured in the journal Astronomy & Astrophysics, show that early galaxies are mature already, lending support to the existence of a cosmic network capable of supplying them with resources.
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听ALMA image of two dusty galaxies These are two of the galaxies in the early universe that ALMA observed in radio waves. The galaxies are considered more "mature" than "primordial" because they contain large amounts of dust (yellow). ALMA also revealed the gas (red), which is used to measure the obscured star-formation and motions in the galaxies. Credit: B. Saxton NRAO/AUI/NSF, ALMA (ESO/NAOJ/NRAO), ALPINE team |
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This is a joint Press Release with NRAO (USA), CNRS (France), the Universities of Bologna and Padova (Italy), the AV短视频 of Cambridge and Kavli Institute (UK), the Dawn Centre (Denmark), CalTech (USA), UC Davis (USA), the Keck Foundation (USA), Cornell AV短视频 (USA), the AV短视频 of Valparaiso (Chile), IPMU (Japan), NAOJ (Japan), and the Waseda AV短视频 (Japan).
Complete UniGE press release
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France:
ALPINE papers in Astronomy & Astrophysics with first authors from UniGE:
ALPINE papers in Astronomy & Astrophysics appearing in the same volume:
Le F猫vre et al.听
B茅thermin et al.
Cassata et al.
Gruppioni听et al.
Contacts: Daniel Schaerer, Miroslava Dessauges-Zavadsky, Pascal Oesch
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