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    ALMA tagged posts

    ALMA and VLT find too many Massive Stars in a Starburst galaxies, near and far

    June 5, 2018, Categories  Astronomy/Space

    This artist's impression shows a dusty galaxy in the distant Universe that is forming stars at a rate much higher than in our Milky Way. New ALMA observations have allowed scientists to lift the veil of dust and see what was previously inaccessible -- that such starburst galaxies have an excess of massive stars as compared to more peaceful galaxies. Credit: ESO/M. Kornmesser

    This artist’s impression shows a dusty galaxy in the distant Universe that is forming stars at a rate much higher than in our Milky Way. New ALMA observations have allowed scientists to lift the veil of dust and see what was previously inaccessible — that such starburst galaxies have an excess of massive stars as compared to more peaceful galaxies. Credit: ESO/M. Kornmesser

    Astronomers using ALMA and the VLT have discovered that both starburst galaxies in the early Universe and a star-forming region in a nearby galaxy contain a much higher proportion of massive stars than is found in more peaceful galaxies. These findings challenge current ideas about how galaxies evolved, changing our understanding of cosmic star-formation history and the build up of chemical elements.

     
    Zhang and his...
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    Doubt Cast on New Theories of Star Formation

    May 1, 2018, Categories  Astronomy/Space

    Stars over mountains

    The birth of stars from dense clouds of gas and dust may be happening in a completely unexpected way in our own galaxy and elsewhere.

    New findings reveal surprising distribution of star-forming cores outside of our galaxy. The birth of stars from dense clouds of gas and dust may be happening in a completely unexpected way in our own galaxy and beyond. This is according to an international team, including scientists from Cardiff University, who have found that long-held assumptions about the relationship between the mass of star-forming clouds of dust and gas and the eventual mass of the star itself may not be as straightforward as we think.

    The underlying reasons as to why a star eventually grows to a specific mass has puzzled scientists for some time...

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    ALMA reveals Inner Web of Stellar Nursery

    March 8, 2018, Categories  Astronomy/Space

    This spectacular and unusual image shows part of the famous Orion Nebula, a star formation region lying about 1350 light-years from Earth. It combines a mosaic of millimetre wavelength images from the Atacama Large Millimeter/submillimeter Array (ALMA) and the IRAM 30-metre telescope, shown in red, with a more familiar infrared view from the HAWK-I instrument on ESO's Very Large Telescope, shown in blue. The group of bright blue-white stars at the left is the Trapezium Cluster -- made up of hot young stars that are only a few million years old. Credit: ESO/H. Drass/ALMA (ESO/NAOJ/NRAO)/A. Hacar

    This spectacular and unusual image shows part of the famous Orion Nebula, a star formation region lying about 1350 light-years from Earth. It combines a mosaic of millimetre wavelength images from the Atacama Large Millimeter/submillimeter Array (ALMA) and the IRAM 30-metre telescope, shown in red, with a more familiar infrared view from the HAWK-I instrument on ESO’s Very Large Telescope, shown in blue. The group of bright blue-white stars at the left is the Trapezium Cluster — made up of hot young stars that are only a few million years old. Credit: ESO/H. Drass/ALMA (ESO/NAOJ/NRAO)/A. Hacar

    New data from the ALMA and other telescopes have been used to create this stunning image showing a web of filaments in the Orion Nebula...

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    Proxima Centauri’s no good, very bad day

    February 27, 2018, Categories  Astronomy/Space

    An artist’s impression of a flare from Proxima Centauri, modeled after the loops of glowing hot gas seen in the largest solar flares. An artist’s impression of the exoplanet Proxima b is shown in the foreground. Proxima b orbits its star 20 times closer than the Earth orbits the Sun. A flare 10 times larger than a major solar flare would blast Proxima b with 4,000 times more radiation than the Earth gets from our Sun’s flares. Credit: Roberto Molar Candanosa / Carnegie Institution for Science, NASA/SDO, NASA/JPL.

    An artist’s impression of a flare from Proxima Centauri, modeled after the loops of glowing hot gas seen in the largest solar flares. An artist’s impression of the exoplanet Proxima b is shown in the foreground. Proxima b orbits its star 20 times closer than the Earth orbits the Sun. A flare 10 times larger than a major solar flare would blast Proxima b with 4,000 times more radiation than the Earth gets from our Sun’s flares. Credit: Roberto Molar Candanosa / Carnegie Institution for Science, NASA/SDO, NASA/JPL.

    Flare illuminates lack of a dust ring; puts habitability of Proxima b in question. Astronomers have detected a massive stellar flare – an energetic explosion of radiation – from the closest star to our own Sun, Proxima Centauri, which occurred last March...

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