ALMA: What 100,000 Star Factories in 74 Galaxies Tell Us About Star Formation

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ALMA: What 100,000 Star Factories in 74 Galaxies Tell Us About Star Formation

Post by bystander » Thu Jan 10, 2019 7:02 pm

What 100,000 Star Factories in 74 Galaxies Tell Us about Star Formation
ALMA | ESO | NAOJ | NRAO | 2019 Jan 09

The ALMA telescope is conducting an unprecedented survey of nearby disk galaxies to study their stellar nurseries. With it, astronomers are beginning to unravel the complex and as-yet poorly understood relationship between star-forming clouds and their host galaxies.

Galaxies come in a wide variety of shapes and sizes. Some of the most significant differences among galaxies, however, relate to where and how they form new stars. Compelling research to explain these differences has been elusive, but that is about to change.

A vast, new research project with the Atacama Large Millimeter / submillimeter Array (ALMA), known as PHANGS-ALMA (Physics at High Angular Resolution in Nearby GalaxieS), delves into this question with far greater power and precision than ever before by measuring the demographics and characteristics of a staggering 100,000 individual stellar nurseries spread throughout 74 galaxies.

PHANGS-ALMA, an unprecedented and ongoing research campaign, has already amassed a total of 750 hours of observations and given astronomers a much clearer understanding of how the cycle of star formation changes, depending on the size, age, and internal dynamics of each individual galaxy. This campaign is 10 to 100 times more powerful (depending on your parameters) than any prior survey of its kind. ...

Cloud-Scale Molecular Gas Properties in 15 Nearby Galaxies ~ Jiayi Sun et al Star Formation Efficiency per Free-Fall Time in Nearby Galaxies ~ Dyas Utomo et al A 50 pc Scale View of Star Formation Efficiency across NGC 628 ~ K. Kreckel et al
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