Tag Archives: RCW

Vista achieves unprecedented detail in capturing images of the RCW 38

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The astronomer using it Telescope for ESO visible infrared investigation telescopes (Vista) created something amazing 80 million pixel images Star cluster RCW 38.

This Vista/Vircam Image shows the Superstar Cluster RCW 38. Image credit: ESO/VVVX survey.

RCW 38 is an approximately superstar cluster 5,500 light years They are separated by Vera's constellation.

It is the youngest of the 13 superstar clusters in the Milky Way (less than one million years) and is the dense stellar system in 13,000 light years from the Sun.

Includes hundreds of young, hot, giant stars and brown dwarfs.

RCW 38 is a “embedded” cluster in that new clouds of dust and gas still envelop the stars.

The intense radiation poured from the newly born stars makes the surrounding gas bright and bright.

This is in stark contrast to the cool, cosmic dust streams that engulf the region.

“Compared to our Sun, which is at a stable stage in that life about 4.6 billion years ago, the RCW 38 star is still very young,” the ESO astronomer said in a statement.

“In less than a million years, RCW 38 contains around 2,000 stars, creating this psychedelic landscape.”

“The cluster of stars is like a giant pressure cooker, and contains all the ingredients for star formation: dense gas clouds and opaque masses of cosmic dust. This mixture of gas and dust itself If it collapses under the gravity of the 'stars','

“The strong radiation from these newborn stars creates the gas that brightens up the glow of the star cluster, creating the pink tint you see here.”

“It's a truly spectacular sight! But in visible light, many of the stars in the RCW 38 cluster remain hidden from us, and dust blocks those views.”

That's where the Vista telescope appears. Its Vircam camera observes infrared rays that can pass through almost unobstructed dust, unlike visible light, and reveals the true richness of the RCW 38.

“We also see a cold “failed” star known as a young star, or a brown dwarf, in a dusty coco,” the astronomer said.

“This infrared image was taken during that time. Vista variables in the Vía Láctea (VVV) surveycreated the most detailed infrared map of Home Galaxy ever made. ”

“Studies like this either reveal unknown astronomical objects, or give us a new perspective on known objects.”

Source: www.sci.news

Hubble Space Telescope Discovers a Massive Binary Protostar within the RCW 7 Nebula

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RCW 7 is located in the constellation Puppis, about 5,300 light years from Earth.

This Hubble image shows the nebula RCW 7. Image courtesy of NASA/ESA/Hubble/J. Tan, Chalmers University, University of Virginia.

“Nebulae are regions of space that are rich in the raw materials needed to form new stars,” the Hubble astronomers said.

“Due to the effects of gravity, some of these molecular clouds collapse and merge into protostars surrounded by a rotating disk of remaining gas and dust.”

“In the case of RCW 7, the protostar forming here is particularly massive, emitting intense ionizing radiation and a powerful stellar wind that propelled the star into a “H II region“.

“The H II regions are filled with hydrogen ions. HI refers to regular hydrogen atoms, and H II is hydrogen that has lost an electron.”

“Ultraviolet rays from the massive protostar excite the hydrogen, which then emits light that gives the nebula its soft pink glow.”

In RCW 7, the researchers IRAS 07299-1651.

“IRAS 07299-1651 still resides within a cocoon of glowing gas, in clouds swirling towards the top of the nebula,” the researchers said.

To expose this star and its sibling, the new image was created from separate exposures taken in the near-infrared region of the spectrum. Hubble’s Wide Field Camera 3 (WFC3).

“This massive protostar is most bright in ultraviolet light, but it also emits a lot of infrared light that penetrates much of the surrounding gas and dust and can be seen by the Hubble Telescope,” the scientists said.

“Many of the other large visible stars in this image are not part of the nebula, but are located between the nebula and the solar system.”

Assuming a circular orbit, IRAS 07299-1651 is estimated to have a minimum total mass of 18 times that of the Sun and a maximum period of 570 years.

“The formation of the H II region marks the beginning of the end of the molecular cloud,” the authors said.

“Over just a few million years, radiation and winds from the massive stars gradually disperse the gas, and this dispersion continues as the most massive stars end their lives in supernova explosions.”

“Only a small portion of this gas will be absorbed by new stars within the nebula, while the rest will spread throughout the galaxy and eventually form new molecular clouds.”

Team Investigation result Published in a journal Natural Astronomy.

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Y. Chan others2024. Dynamics of a giant binary star at birth. Nat Astron 3, 517-523; doi: 10.1038/s41550-019-0718-y

Source: www.sci.news