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    Protostar tagged posts

    High-Resolution Simulations Explore the Physics of Star Formation

    January 13, 2025, Categories  Astronomy/Space

    Rocking the magnetic cradle of stellar birth
    The new simulations show a cross section of the star and its surrounding disk of gas. In the left image, where the young star is weakly magnetized, gas can be seen flowing freely from the surrounding disk of material to the surface of the protostar. In the right image, material flows along the magnetic field lines towards the star’s poles, in a much more defined flow. Credit: Astronomy & Astrophysics (2024). DOI: 10.1051/0004-6361/202451842

    Stars are born in clouds of gas and dust, making it difficult to observe their early development. But researchers at Chalmers have now succeeded in simulating how a star with the mass of the sun absorbs material from the surrounding disk of material—a process called accretion.

    The researchers simulated four stars with the same mass but with v...

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    Protostars can Siphon Material from Far Away, says study

    October 20, 2023, Categories  Astronomy/Space

    Protostars can siphon material from far away
    This artist’s conception shows a newly formed protostar surrounded by a swirling protoplanetary disk of dust and gas. Credit: University of Copenhagen/Lars Buchhave

    When stars are born, they do it inside a molecular cloud. Astronomers long assumed that the “crèche” supplied all the nutrients that protostars needed to form. However, it turns out they get help from outside the nest.

    A new study published in the journal Astronomy & Astrophysics by scientists at the Max Planck Institute for Extraterrestrial Physics delved into the role of streamers and filaments in the star-birth process. Think of them as channels that extend out from the interior of the stellar creche, sometimes out as far as 10,000 astronomical units (about 0.15 light-years)...

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    NASA’s Webb catches Fiery Hourglass as New Star Forms

    November 17, 2022, Categories  Astronomy/Space

    The protostar within the dark cloud L1527, shown in this image from NASA’s James Webb Space Telescope Near-Infrared Camera (NIRCam), is embedded within a cloud of material feeding its growth. Ejections from the star have cleared out cavities above and below it, whose boundaries glow orange and blue in this infrared view. The upper central region displays bubble-like shapes due to stellar “burps,” or sporadic ejections.
    Credits: NASA, ESA, CSA, and STScI. Image processing: J. DePasquale, A. Pagan, and A. Koekemoer (STScI)

    NASA’s James Webb Space Telescope has revealed the once-hidden features of the protostar within the dark cloud L1527, providing insight into the beginnings of a new star...

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    Astrophysics: A direct view of Star/Disk Interactions

    September 1, 2020, Categories  Astronomy/Space

    Artist’s impression of the streams of hot gas that build up stars. Matter from the surrounding protoplanetary disk, the birthplace of planets, is channeled onto the stellar surface by magnetic fields shocking the surface at supersonic velocity (Copyright: Mark A. Garlick).

    A team including researchers from the Institute for Astrophysics of the University of Cologne has for the first time directly observed the columns of matter that build up newborn stars. This was observed in the young star TW Hydrae system located approximately 163 light years from Earth. This result was obtained with the Very Large Telescope Interferometer (VLTI) and its GRAVITY instrument of the European Southern Observatory (ESO) in Chile...

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