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    Astronomers observe a Dying Red Giant Star’s Final Act

    March 19, 2017, Categories  Astronomy/Space

    This is a molecular gas around star LL Pegasi. Credit: ALMA, Hyosun Kim

    This is a molecular gas around star LL Pegasi. Credit: ALMA, Hyosun Kim

    Using a powerful telescope, scientists view spiral pattern of gaseous emissions around LL Pegasi and its companion star. An international team of astronomers has observed a striking spiral pattern in the gas surrounding a red giant star named LL Pegasi and its companion star 3,400 light-years from Earth using ALMA. “What we are seeing in splendid detail with these observations is the final act of a dying red giant star, as it sheds most of its gaseous bulk in a strong, outflowing wind,” said Mark Morris, UCLA professor of physics and astronomy.

    After comparing their telescopic observations with computer simulations, the astronomers concluded that a highly elliptical orbit is responsible for the shape of the gaseous emi...

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    First look at Birthplaces of most current stars

    December 21, 2016, Categories  Astronomy/Space

    Radio/Optical combination images of distant galaxies as seen with NSF's Very Large Array and NASA's Hubble Space Telescope. Their distances from Earth are indicated in the top set of images. Below, the same images, without labels. Credit: K. Trisupatsilp, NRAO/AUI/NSF, NASA.

    Radio/Optical combination images of distant galaxies as seen with NSF’s Very Large Array and NASA’s Hubble Space Telescope. Their distances from Earth are indicated in the top set of images. Below, the same images, without labels. Credit: K. Trisupatsilp, NRAO/AUI/NSF, NASA.

    Highly sensitive images reveal details of distant galaxies. Astronomers have gotten their first look at exactly where most of today’s stars were born. To do so, they used the Karl G. Jansky Very Large Array (VLA) and Atacama Large Millimeter/ submillimeter Array (ALMA) to look at distant galaxies seen as they were some 10 billion years ago. At that time, the Universe was experiencing its peak rate of star formation. Most stars in the present Universe were born then.

    “We knew that galaxies in that era were forming sta...

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    ALMA Explores the Hubble Ultra Deep Field: Deepest ever millimeter observations of early Universe

    September 23, 2016, Categories  Astronomy/Space

    A trove of galaxies, rich in carbon monoxide (indicating star-forming potential) were imaged by ALMA (orange) in the Hubble Ultra Deep Field. The blue features are galaxies imaged by Hubble. This image is based on the very deep ALMA survey by Manuel Aravena, Fabian Walter and colleagues, covering about one sixth of the full HUDF area. Credit: B. Saxton (NRAO/AUI/NSF); ALMA (ESO/NAOJ/NRAO); NASA/ESA Hubble

    A trove of galaxies, rich in carbon monoxide (indicating star-forming potential) were imaged by ALMA (orange) in the Hubble Ultra Deep Field. The blue features are galaxies imaged by Hubble. This image is based on the very deep ALMA survey by Manuel Aravena, Fabian Walter and colleagues, covering about one sixth of the full HUDF area. Credit: B. Saxton (NRAO/AUI/NSF); ALMA (ESO/NAOJ/NRAO); NASA/ESA Hubble

    International teams used ALMA to explore the distant corner of the Universe first revealed in the iconic images of the Hubble Ultra Deep Field (HUDF). These new ALMA observations are significantly deeper and sharper than previous surveys at millimetre wavelengths. They clearly show how the rate of star formation in young galaxies is closely related to their total mass in stars...

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    Spiderweb Galaxy: Watery Dew Drops surrounding dusty Spider’s Web

    July 2, 2016, Categories  Astronomy/Space

    Annotated image of the Spiderweb Galaxy as seen by the Hubble Space Telescope (optical) in red, the Very Large Array (radio) in green and the Atacama Large Millimeter/submillimeter Array (sub-millimetre) in blue. The red colour shows where the stars are located within this system of galaxies. The radio jet is shown in green, and the position of the dust and water are seen in blue. The water is located to the left and right of the central galaxy. The water to the right is at the position where the radio jet bends down wards. The dust is also seen in blue. The dust is located at the central galaxy and in smaller companion galaxies in its surroundings. Credit: NASA/ESA/HST/STScI/NRAO/ESO/

    Annotated image of the Spiderweb Galaxy as seen by the Hubble Space Telescope (optical) in red, the Very Large Array (radio) in green and the Atacama Large Millimeter/submillimeter Array (sub-millimetre) in blue. The red colour shows where the stars are located within this system of galaxies. The radio jet is shown in green, and the position of the dust and water are seen in blue. The water is located to the left and right of the central galaxy. The water to the right is at the position where the radio jet bends down wards. The dust is also seen in blue. The dust is located at the central galaxy and in smaller companion galaxies in its surroundings. Credit: NASA/ESA/HST/STScI/NRAO/ESO/

    Astronomers have spotted glowing droplets of condensed water in the distant Spiderweb Galaxy – but not wh...

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