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    NGC 4490 tagged posts

    Astronomers reveal rare Double Nucleus in nearby ‘Cocoon Galaxy’

    February 8, 2020, Categories  Astronomy/Space

    Allen Lawrence, a 77-year-old who earned an Iowa State master’s degree in astrophysics in 2018, is first author of a paper revealing a rare double-nucleus structure in a well-known, nearby galaxy. Larger photo. Photo by Christopher Gannon.

    The so-called “Cocoon Galaxy” not only has a unique shape, it has a rare double-nucleus structure, astronomers report in a new paper.

    After studying data from optical and radio telescopes based on the ground and in space, a team of astronomers determined that a galaxy known as NGC 4490 (and nicknamed the “Cocoon Galaxy” because of its shape) has “a clear double nucleus structure,” according to their paper.

    One nucleus can be seen in optical wavelengths. The other is hidden in dust and can only be seen in infrared and radio wavelengths.

    The...

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    Galaxy Blazes with New Stars born from close encounter

    May 19, 2019, Categories  Astronomy/Space

    New image of irregular galaxy NGC 4485 captured by Hubble’s Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS).
    Credit: NASA and ESA; Acknowledgment: T. Roberts (Durham University, UK), D. Calzetti (University of Massachusetts) and the LEGUS Team, R. Tully (University of Hawaii), and R. Chandar (University of Toledo)

    The irregular galaxy NGC 4485 shows all the signs of having been involved in a hit-and-run accident with a bypassing galaxy. Rather than destroying the galaxy, the chance encounter is spawning a new generation of stars, and presumably planets.

    The right side of the galaxy is ablaze with star formation, shown in the plethora of young blue stars and star-incubating pinkish nebulas. The left side, however, looks intact...

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    Bursting with Starbirth

    September 30, 2017, Categories  Astronomy/Space

    This image, taken with the NASA/ESA Hubble Space Telescope, shows the galaxy NGC 4490. The scattered and warped appearance of the galaxy are the result of a past cosmic collision with another galaxy, NGC 4485 (not visible in this image). Credit: ESA/Hubble & NASA

    This image, taken with the NASA/ESA Hubble Space Telescope, shows the galaxy NGC 4490. The scattered and warped appearance of the galaxy are the result of a past cosmic collision with another galaxy, NGC 4485 (not visible in this image). Credit: ESA/Hubble & NASA

    This oddly-shaped galactic spectacle is bursting with brand new stars. The pink fireworks in this image taken with the NASA/ESA Hubble Space Telescope are regions of intense star formation, triggered by a cosmic-scale collision. The huge galaxy in this image, NGC 4490, has a smaller galaxy in its gravitational grip and is feeling the strain.

    Compared to the other fundamental forces in the Universe, gravity is fairly weak...

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