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    New Galaxy Sheds Light on How Stars Form

    January 28, 2021, Categories  Astronomy/Space

    Image of galaxies
    A tidal dwarf galaxy (blue) and a spiral galaxy (greyscale). The Milky Way is an example of a spiral galaxy. (Created from images taken by the Hubble Space Telescope and ALMA.)

    A lot is known about galaxies. We know, for instance, that the stars within them are shaped from a blend of old star dust and molecules suspended in gas. What remains a mystery, however, is the process that leads to these simple elements being pulled together to form a new star.

    But now an international team of scientists, including astrophysicists from the University of Bath in the UK and the National Astronomical Observatory (OAN) in Madrid, Spain have taken a significant step towards understanding how a galaxy’s gaseous content becomes organised into a new generation of stars.

    Their findings have import...

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    First look at Gravitational Dance that drives Stellar Formation

    July 7, 2017, Categories  Astronomy/Space

    Left: three color composite image of SDC13 where red, green and blue bands correspond to 70?m HIGAL (Molinari et al. 2010), 24?m Spitzer MIPSGAL (Carey et al. 2009) and 8?m Spitzer GLIMPSE (Churchwell et al. 2009) maps respectively. The four dark, filamentary arms are clearly visible. Right: Brand new, high resolution map of SDC13 tracing the internal dense ammonia gas revealing cores dotted along all the filaments. Credit: G. Williams et al. / University of Cardiff

    Left: three color composite image of SDC13 where red, green and blue bands correspond to 70?m HIGAL (Molinari et al. 2010), 24?m Spitzer MIPSGAL (Carey et al. 2009) and 8?m Spitzer GLIMPSE (Churchwell et al. 2009) maps respectively. The four dark, filamentary arms are clearly visible. Right: Brand new, high resolution map of SDC13 tracing the internal dense ammonia gas revealing cores dotted along all the filaments. Credit: G. Williams et al. / University of Cardiff

    Swirling motions in clouds of cold, dense gas have given, for the first time, an active insight into how gravity creates the compact cores from which stars form in the interstellar medium...

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    A Stellar Circle of Life

    November 27, 2016, Categories  Astronomy/Space

    The stellar nursery Cygnus X-3.

    Cygnus X-3 is an X-ray binary where a compact source is pulling material away from a massive companion star. Chandra’s high-resolution X-ray vision revealed a cloud of gas and dust that is a separated by a very small distance from Cygnus X-3. This gas cloud, dubbed the “Little Friend,” is a Bok globule, the first ever detected in X-rays and the most distant one ever discovered. Astronomers detected jets produced by the “Little Friend”, showing that a star is forming inside it. Credits: X-ray: NASA/CXC/SAO/M.McCollough et al, Radio: ASIAA/SAO/SMA

    A snapshot of the stellar life cycle has been captured in a new portrait from NASA’s Chandra X-ray Observatory and the Smithsonian’s Submillimeter Array (SMA)...

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