Researchers have created the most detailed maps yet of a vast seedbed of stars similar to Earth’s sun.
The maps provide unprecedented detail of the structure of the Orion A molecular cloud, the closest star-forming region of high-mass stars. Orion A hosts a variety of star-forming environments, including dense star clusters similar to the one where Earth’s sun is believed to have formed.
“Our maps probe a wide range of physical scales needed to study how stars form in molecular clouds, and how young stars impact their parent cloud,” says Shuo Kong, a postdoctoral associate at Yale University and first author of a study, which appears in Astrophysical Journal Supplements.
Kong says the team constructed its maps of the Orion A cloud by combining data from a single-dish telescope and an interferometer.
The dataset and maps are collectively known as the CARMA-NRO Orion Survey. The name refers to the Combined Array for Research in Millimeter Astronomy (CARMA), an interferometer that was located in California, and the Nobeyama Radio Observatory (NRO) telescope in Japan.
“Our survey is a unique combination of data from two very different telescopes,” says coauthor Jesse Feddersen, a graduate student. “We have combined the zoom of CARMA with the wide-angle of NRO to simultaneously capture the details of individual forming stars and the overall shape and motions of the giant molecular cloud.”
In addition, the maps will help researchers calibrate star formation models for extragalactic studies. “The data we provide here will benefit research on a broad range of evolutionary stages of the star formation process and on the environment stars form,” says coauthor Héctor G. Arce, an astronomy professor.
“The combined observations are a great help for astronomers seeking to understand how fast and efficiently stars form. For example, their maps show the energy released by high-mass stars has a strong impact on the cloud environment,” says Glen Langston, program director at the National Science Foundation.
The research team includes astronomers from institutions in the US, Chile, Japan, France, Germany, Spain, and the UK. The team’s principal investigators are from Yale, ALMA Observatory, and Caltech.
The National Science Foundation supported the work.
Source: Yale University