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    star formation tagged posts

    Shocked Gas in Galaxy Collisions

    May 1, 2017, Categories  Astronomy/Space

    An image of the colliding galaxies known as The Antennae, taken in the optical and near-infrared. Astronomers using the ALMA submillimeter array have found evidence for shocked gas near the nucleus of the northern (upper) galaxy, and argue that it is due to material infalling onto the nuclear region. Credit: ESA/Hubble & NASA

    An image of the colliding galaxies known as The Antennae, taken in the optical and near-infrared. Astronomers using the ALMA submillimeter array have found evidence for shocked gas near the nucleus of the northern (upper) galaxy, and argue that it is due to material infalling onto the nuclear region. Credit: ESA/Hubble & NASA

    Collisions between galaxies, especially ones rich in molecular gas, can trigger bursts of star formation that heat the dust and result in their shining brightly in the infrared. Astronomers think that there is also significant gas inflowing to the central regions of galaxies that can stimulate starburst activity. Inflowing gas, as it collides with the gas in the inner regions, should produce powerful shocks that should make the gas itself glow...

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    Supermassive Black Holes Stifle Galaxy Growth

    April 19, 2017, Categories  Astronomy/Space

    An artist’s rendition of the galaxies Akira (right) and Tetsuo (left) in action. Akira’s gravity pulls Tetsuo’s gas into its central supermassive black hole, fuelling winds that have the power to heat Akira’s gas. Because of the action of the black hole winds, Tetsuo’s donated gas is rendered inert, preventing a new cycle of star formation in Akira. Copyright : Prime Focus Spectrograph Project

    An artist’s rendition of the galaxies Akira (right) and Tetsuo (left) in action. Akira’s gravity pulls Tetsuo’s gas into its central supermassive black hole, fuelling winds that have the power to heat Akira’s gas. Because of the action of the black hole winds, Tetsuo’s donated gas is rendered inert, preventing a new cycle of star formation in Akira. Copyright : Prime Focus Spectrograph Project

    Supermassive black hole winds in a newly discovered class of galaxies are so energetic they suppress future star formation. An international team involved in the SDSS-IV MaNGA (Sloan Digital Sky Survey-IV Mapping Nearby Galaxies at Apache Point Observatory) project is studying ~10,000 galaxies near Earth...

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    New Hubble Mosaic of the Orion Nebula

    March 18, 2017, Categories  Astronomy/Space

    This composite image of the Kleinmann-Low Nebula, part of the Orion Nebula complex, is composed of several pointings of the NASA/ESA Hubble Space Telescope in optical and near-infrared light. Infrared light allows to peer through the dust of the nebula and to see the stars therein. The revealed stars are shown with a bright red colour in the image. Credit: NASA, ESA/Hubble

    This composite image of the Kleinmann-Low Nebula, part of the Orion Nebula complex, is composed of several pointings of the NASA/ESA Hubble Space Telescope in optical and near-infrared light. Infrared light allows to peer through the dust of the nebula and to see the stars therein. The revealed stars are shown with a bright red colour in the image.
    Credit: NASA, ESA/Hubble

    In the search for rogue planets and failed stars astronomers using Hubble have created a new mosaic image of the Orion Nebula. During their survey of the famous star formation region, they found what may be the missing piece of a cosmic puzzle; the third, long-lost member of a star system that had broken apart.

    The Orion Nebula is the closest star formation region to Earth, only 1400 light-years away...

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    The Rotation Axes of Stars tell us about how they were Born

    March 18, 2017, Categories  Astronomy/Space

    Numerical simulation of the fragmentation of a cluster of stars up to the formation of stars (left) with a zoom on the most central part of the cluster (right). The inclination axes of the masses similar to those observed by the Kepler satellite (in cluster NGC 6791) align in this simulation when the kinetic energy of the original cloud is comparable to the ambient turbulent energy. © E.Corsaro & Y.-N Lee

    Numerical simulation of the fragmentation of a cluster of stars up to the formation of stars (left) with a zoom on the most central part of the cluster (right). The inclination axes of the masses similar to those observed by the Kepler satellite (in cluster NGC 6791) align in this simulation when the kinetic energy of the original cloud is comparable to the ambient turbulent energy. © E.Corsaro & Y.-N Lee

    Using asteroseismology, an international team including CEA, CNRS and Université Grenoble-Alpes discovered a surprising alignment of the rotation axes of stars in open clusters, shedding light on the conditions in which stars are formed in our galaxy...

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