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    Einstein Ring tagged posts

    Cosmic Lens helps Hubble capture image of most Distant Star ever seen

    April 3, 2018, Categories  Astronomy/Space

    Icarus, whose official name is MACS J1149+2223 Lensed Star 1, is the farthest individual star ever seen. It is only visible because it is being magnified by the gravity of a massive galaxy cluster, located about 5 billion light-years from Earth. Called MACS J1149+2223, this cluster, shown at left, sits between the Earth and the galaxy that contains the distant star. The team had been using Hubble to monitor a supernova in the far-off spiral galaxy when, in 2016, they spotted a point of light near the supernova that began to brighten. Even though the object subsequently became three times brighter in one month, the colors of the light coming from the object did not change. Analysis of these colors showed it was a blue supergiant star in the background galaxy whose magnification grew for several weeks due to an intervening object, probably a star, in the galaxy cluster. The panels at the right show the view in 2011, without Icarus visible, compared with the star's brightening in 2016. Credit: NASA, ESA, and P. Kelly, University of Minnesota

    Icarus, whose official name is MACS J1149+2223 Lensed Star 1, is the farthest individual star ever seen. It is only visible because it is being magnified by the gravity of a massive galaxy cluster, located about 5 billion light-years from Earth. Called MACS J1149+2223, this cluster, shown at left, sits between the Earth and the galaxy that contains the distant star. The team had been using Hubble to monitor a supernova in the far-off spiral galaxy when, in 2016, they spotted a point of light near the supernova that began to brighten. Even though the object subsequently became three times brighter in one month, the colors of the light coming from the object did not change...

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    One of the Brightest Galaxies ever discovered

    July 16, 2017, Categories  Astronomy/Space

    The multiple images of the discovered galaxy are indicated by white arrows (bottom right shows the scale of the image in seconds of arc). Credit: Hubble Space Telescope (HST)

    The multiple images of the discovered galaxy are indicated by white arrows (bottom right shows the scale of the image in seconds of arc). Credit: Hubble Space Telescope (HST)

     
    Using gravitational lensing, a team of scientists from the Instituto de Astrofisica de Canarias (IAC) has discovered a very distant galaxy, some 10 thousand million light years away, about a thousand times brighter than the Milky Way. It is the brightest of the submillimetre galaxies, called this because of their very strong emissionin the far infrared. To measure it they used the Gran Telescopio Canarias (GTC) at the Roque de los Muchachos Observatory (Garafía, La Palma).
     
    “Thanks to the gravitational lens” notes Anastasio Díaz Sánchez, a researcher at the UPCT and first author of the article ” produ...
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    Dwarf Dark Galaxy hidden in ALMA Gravitational Lens image

    April 17, 2016, Categories  Astronomy/Space

    Composite image of the gravitational lens SDP.81 showing the distorted ALMA image of the more distant galaxy (red arcs) and the Hubble optical image of the nearby lensing galaxy (blue center object). By analyzing the distortions in the ring, astronomers have determined that a dark dwarf galaxy (data indicated by white dot near left lower arc segment) is lurking nearly 4 billion light-years away. Credit: Y. Hezaveh, Stanford Univ.; ALMA (NRAO/ESO/NAOJ); NASA/ESA Hubble Space Telescope

    Composite image of the gravitational lens SDP.81 showing the distorted ALMA image of the more distant galaxy (red arcs) and the Hubble optical image of the nearby lensing galaxy (blue center object). By analyzing the distortions in the ring, astronomers have determined that a dark dwarf galaxy (data indicated by white dot near left lower arc segment) is lurking nearly 4 billion light-years away. Credit: Y. Hezaveh, Stanford Univ.; ALMA (NRAO/ESO/NAOJ); NASA/ESA Hubble Space Telescope

    Subtle distortions hidden in ALMA’s stunning image of the gravitational lens SDP.81 are telltale signs that a dwarf dark galaxy is lurking in the halo of a much larger galaxy nearly 4 billion light-years away...

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    Monster ‘Einstein-Ring’ Galaxy Observed at the Edge of the Universe (Weekend Feature)

    October 4, 2015, Categories  Astronomy/Space

    The team modeled the lensing effects and corrected for them to reveal the distribution of huge stellar cradles in the monstrous galaxy shown in the image above. As a bonus, the same model indicates, for the first time, the existence of a supermassive black hole at the center of the foreground galaxy.

    The team modeled the lensing effects and corrected for them to reveal the distribution of huge stellar cradles in the monstrous galaxy shown in the image above. As a bonus, the same model indicates, for the first time, the existence of a supermassive black hole at the center of the foreground galaxy.

    Researchers have depicted a monstrous galaxy near the edge of the charted Universe with unprecedented detail using the Atacama Large Millimeter/submillimeter Array (ALMA) with the assistance of a ‘natural telescope’ ie gravitational lens.

    The galaxy is seen at a time when the Universe was 15% of its current age, only 2.4 billion years after Big Bang. The light has taken over twice the age of the Earth to reach us (11...

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