Stars form from dense cores inside giant molecular clouds. Why do some cores spawn single stars while others spawn multiple stars?
The team watched multiple star systems forming in the Orion Complex and made important discoveries about the process. They presented their findings in a paper published in The Astrophysical Journal. The paper is “
This image shows the G205.46-14.56 clump located in the Orion Molecular Cloud Complex. The yellow contours show the dense cores discovered by JCMT, and the zoomed-in pictures show the 1.3mm continuum emission of ALMA observation. These observations give insight into the formation of various stellar systems in dense cores. Image Credit: Qiuyi Luo et al. 2022.
“This is understandable,” said first author Qiuyi Luo. “Denser cores are much easier to fragment due to the perturbations caused by self-gravity inside molecular cores.” “These Nobeyama observations provide a good measurement of turbulence levels in dense cores. Our findings indicate that binary/multiple stars tend to form in more turbulent cores,” said Prof. Ken’ichi Tatematsu, who led the Nobeyama observations.
Co-author Sheng-Yuan Liu added, “The JCMT has proven to be a great tool for uncovering these stellar nurseries for ALMA follow-ups. With ALMA providing unprecedented sensitivity and resolution so that we can do similar studies toward a much sample of larger dense cores for a more thorough understanding of star formation.”
One of the questions is what role do magnetic fields play in star formation? Star-forming clouds can be highly magnetized. Magnetic fields from the interstellar medium thread their way through star-forming clouds, and astronomers know that magnetic fields can affect the star formation rate. Do they play a role in determining if a single star forms versus multiple stars?
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