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    Observations Explore Radio Jet of a Powerful Quasar

    February 27, 2024, Categories  Uncategorized

    Observations explore radio jet of a powerful quasar
    VLBI image of PKS 2215+020 at 1.7 GHz. Credit: Universe (2024). DOI: 10.3390/universe10020097

    European astronomers have conducted very long baseline interferometric (VLBI) observations of a radio jet structure in a powerful quasar known as PKS 2215+020. The collected VLBI data provide important insights into the properties of this jet, suggesting that PKS 2215+020 is a blazar. The findings were presented February 17 in the Universe journal.

    Quasars, or quasi-stellar objects (QSOs) are active galactic nuclei (AGN) of very high luminosity, emitting electromagnetic radiation observable in radio, infrared, visible, ultraviolet and X-ray wavelengths.

    They are among the brightest and most distant objects in the known universe, and serve as fundamental tools for numerous studies in as...

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    Gas on the run – ALMA spots the Shadow of a Molecular Outflow from a Quasar when the Universe was less than one billion years old

    February 7, 2024, Categories  Astronomy/Space

    The molecular gas outflow from the quasar includes hydroxyl (OH) (top). Due to the motion of the molecular gas toward the observer, the OH peak in the absorption spectrum (bottom, dashed blue line) appears at a shorter wavelength (solid blue line), a phenomenon known as the Doppler effect. (Illustration: ALMA (ESO/NAOJ/NRAO) modified from Dragan Salak, et al. The Astrophysical Journal. February 1, 2024)
    The molecular gas outflow from the quasar includes hydroxyl (OH) (top). Due to the motion of the molecular gas toward the observer, the OH peak in the absorption spectrum (bottom, dashed blue line) appears at a shorter wavelength (solid blue line), a phenomenon known as the Doppler effect. (Illustration: ALMA (ESO/NAOJ/NRAO) modified from Dragan Salak, et al. The Astrophysical Journal. February 1, 2024)

    Theoretical predictions have been confirmed with the discovery of an outflow of molecular gas from a quasar when the Universe was less than a billion years old.

    A quasar is a compact region powered by a supermassive black hole located in the center of a massive galaxy.

    They are extremely luminous, with a point-like appearance similar to stars, and are extremely distant from Earth...

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    Unexpected Chemistry reveals Cosmic Star Factories´ Secrets

    December 17, 2023, Categories  Astronomy/Space, Chemistry/Nanotechnology

    Galaxy illustration with molecules
    Light from many different molecules reveals the secrets of distant star factories. This illustration shows the many molecules found in the quasar APM 08279+5255, together with a Hubble telescope image of a similar galaxy in the nearby universe, IC 5063, which also has an active supermassive black hole at its centre. Background image credits: NASA, ESA & W. P. Maksym (CfA); Jmol (molecules); R. Cumming (montage)Photographer: NASA, ESA & W. P. Maksym (CfA); Jmol (molecules); R. Cumming (montage)

    Two galaxies in the early universe, which contain extremely productive star factories, have been studied by a team of scientists led by Chalmers University of Technology in Sweden...

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    Quasar discovery sets New Distance record

    January 14, 2021, Categories  Astronomy/Space, Physics

    Artist’s conception of the quasar J0313–1806, seen as it was only 670 million years after the Big Bang.
    Credit: NOIRLab/NSF/AURA/J. da Silva

    An international team of astronomers has discovered the most distant quasar yet found — a cosmic monster more than 13 billion light-years from Earth powered by a supermassive black hole more than 1.6 billion times more massive than the Sun and more than 1,000 times brighter than our entire Milky Way Galaxy.

    The quasar, called J0313-1806, is seen as it was when the Universe was only 670 million years old and is providing astronomers with valuable insight on how massive galaxies — and the supermassive black holes at their cores — formed in the early Universe...

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