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#protostar

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Mikko Tuomi

A #JWST image of Herbig-Haro 49/50 — a frothy-looking outflow from a nearby #protostar — with a multi-hued spiral #galaxy.

Herbig-Haro objects are outflows produced by jets launched from a nearby, forming #star.

The outflows, which can extend for light-years, plow into a denser region of material.

This creates shock waves, heating the material to higher temperatures.

The material then cools by emitting light at visible and infrared wavelengths.

#astronomy
science.nasa.gov/missions/webb

NASA’s James Webb Space Telescope observed Herbig-Haro 49/50, an outflow from a nearby still-forming star, in high-resolution near- and mid-infrared light. The intricate features of the outflow, represented in reddish-orange color, provide detailed clues about how young stars form and how their jet activity affects the environment around them. Like the wake of a speeding boat, the bow shocks in this image have an arc-like appearance as the fast-moving jet from the young star slams into the surrounding dust and gas. A chance alignment in this direction of the sky provides a beautiful juxtaposition of this nearby Herbig-Haro object with a more distant spiral galaxy in the background. Herbig-Haro 49/50 gives researchers insights into the early phases of the formation of low-mass stars similar to our own Sun. In this Webb image, blue represents light at 2.0-microns (F200W), cyan represents light at 3.3-microns (F335M), green is 4.4-microns (F444W), orange is 4.7-microns (F470N), and red is 7.7-microns (F770W). Credit: NASA, ESA, CSA, STScI
Public
Mikko Tuomi

Solving the mystery of how #planets like Earth form is an important question for understanding the origin of life.

Planets are thought to form when interstellar dust and gas collect in a #protoplanetary disk surrounding a #protostar, but it has been unclear how #planet formation begins.

By observing protoplanetary disks without dark rings, astronomers can study systems where giant planets have not yet formed.

phys.org/news/2023-10-astronom

Paper by Ohashi et al. (2023):
iopscience.iop.org/article/10.

Phys.org · Astronomers discover first step toward planet formationBy Science X
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