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    Protostar tagged posts

    Chaotically Magnetized Cloud is no place to Build a Star, or is it?

    June 15, 2017, Categories  Astronomy/Space

    This is an artist impression of chaotic magnetic field lines very near a newly emerging protostar. Credit: NRAO/AUI/NSF; D. Berry

    This is an artist impression of chaotic magnetic field lines very near a newly emerging protostar. Credit: NRAO/AUI/NSF; D. Berry

    A team of astronomers using ALMA has discovered a surprisingly weak and wildly disorganized magnetic field very near a newly emerging protostar. These observations suggest that the impact of magnetic fields on star formation is more complex than previously thought. The researchers used ALMA to map the magnetic field surrounding a young protostar dubbed Ser-emb 8, about 1,400 light-years away in the Serpens star-forming region. These observations are the most sensitive ever made of the small-scale magnetic field surrounding a protostar. They also provide important insights into the formation of low-mass stars like our own sun.

    Previous observations with other tel...

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    Dramatic Stellar fireworks of Star Birth

    April 8, 2017, Categories  Astronomy/Space

    Astronomers captured these dramatic images of the remains of a 500-year-old explosion as they explored the firework-like debris from the birth of a group of massive stars, demonstrating that star formation can be a violent and explosive process too. The colors in the ALMA data represent the relative Doppler shifting of the millimeter-wavelength light emitted by carbon monoxide gas. The blue color in the ALMA data represents gas approaching at the highest speeds; the red color is from gas moving toward us more slowly. The background image includes optical and near-infrared imaging from both the Gemini South and ESO Very Large Telescope. The famous Trapezium Cluster of hot young stars appears towards the bottom of this image. The ALMA data do not cover the full image shown here. Credit: ALMA (ESO/NAOJ/NRAO), J. Bally/H. Drass et al

    Astronomers captured these dramatic images of the remains of a 500-year-old explosion as they explored the firework-like debris from the birth of a group of massive stars, demonstrating that star formation can be a violent and explosive process too. The colors in the ALMA data represent the relative Doppler shifting of the millimeter-wavelength light emitted by carbon monoxide gas. The blue color in the ALMA data represents gas approaching at the highest speeds; the red color is from gas moving toward us more slowly. The background image includes optical and near-infrared imaging from both the Gemini South and ESO Very Large Telescope. The famous Trapezium Cluster of hot young stars appears towards the bottom of this image. The ALMA data do not cover the full image shown here...

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    Young Heavyweight Star discovered in the Milky Way

    August 22, 2016, Categories  Astronomy/Space

    Artist's impression of the disc and outflow around the massive young star. Credit: A. Smith, Institute of Astronomy, Cambridge.

    Artist’s impression of the disc and outflow around the massive young star. Credit: A. Smith, Institute of Astronomy, Cambridge.

    A young star, located almost 11,000 light years away could help us understand how the most massive stars in the Universe are formed. This young star, already >30 times the mass of our Sun, is still in the process of gathering material from its parent molecular cloud, and may be even more massive when it finally reaches adulthood. The researchers, led by a team at the University of Cambridge, have identified a key stage in the birth of a very massive star, and found that these stars form in a similar way to much smaller stars like our Sun – from a rotating disc of gas and dust.

    In our galaxy, massive young stars – those with a mass at least 8X greater than the Sun ...

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    T-Tauri Stars

    June 13, 2016, Categories  Astronomy/Space

    T-Tauri Stars

    Young stars and nebulosity in Chamaeleon, a constellation visible predominantly in the southern sky. A new study of young (T-Tauri) stars in this region has determined their ages as being between about five – six million years old, as well as determining other properties. Credit: FORS Team, 8.2-meter VLT Antu, ESO

    A newborn star typically goes through 4 stages of adolescence. It begins life as a protostar still enshrouded in its natal molecular cloud, accreting new material and developing a proto-planetary disc. Slowly, stellar winds and radiation blow away the surrounding shell of gas and dust, and the third stage, when the surrounding envelope has cleared, is called the T-Tauri phase...

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