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    satellite galaxies tagged posts

    Satellite Galaxies can carry on Forming Stars when they Pass Close to their Parent Galaxies

    July 9, 2021, Categories  Astronomy/Space

    Image of the simulated local group used for the article. Left, image of dark matter; on the right, gas distribution. The three main galaxies of the Local Group (MW, M31 and M33) are indicated. Credit: CLUES simulation team.
    Image of the simulated local group used for the article. Left, image of dark matter; on the right, gas distribution. The three main galaxies of the Local Group (MW, M31 and M33) are indicated. Credit: CLUES simulation team

    Historically most scientists thought that once a satellite galaxy has passed close by its higher mass parent galaxy its star formation would stop because the larger galaxy would remove the gas from it, leaving it shorn of the material it would need to make new stars. However, for the first time, a team led by the researcher at the Instituto de Astrofísica de Canarias (IAC), Arianna di Cintio, has shown using numerical simulations that this is not always the case...

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    The Milky Way’s satellites help reveal link between Dark Matter Halos and Galaxy Formation

    April 7, 2020, Categories  Astronomy/Space

    A still image from a simulation of the formation of dark matter structures from the early universe until today. Gravity makes dark matter clump into dense halos, indicated by bright patches, where galaxies form. In this simulation, a halo like the one that hosts the Milky Way forms, and a smaller halo resembling the Large Magellanic Cloud falls toward it. SLAC and Stanford researchers, working with collaborators from the Dark Energy Survey, have used simulations like these to better understand the connection between dark matter and galaxy formation. Credit: Ralf Kaehler/SLAC National Accelerator Laboratory

    Just as the sun has planets and the planets have moons, our galaxy has satellite galaxies, and some of those might have smaller satellite galaxies of their own...

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    Satellite Galaxies at edge of Milky Way coexist with Dark Matter

    April 1, 2017, Categories  Astronomy/Space

    The Large Magelanic Cloud is a well-known satellite or dwarf galaxy that closely orbits the Milky Way and is visible in Earth’s southern hemisphere. RIT researchers make the case for the existence of “missing” satellite galaxies that are cloaked in dark matter and cannot be directly observed. Credit: ESA/NASA/Hubble

    The Large Magelanic Cloud is a well-known satellite or dwarf galaxy that closely orbits the Milky Way and is visible in Earth’s southern hemisphere. RIT researchers make the case for the existence of “missing” satellite galaxies that are cloaked in dark matter and cannot be directly observed. Credit: ESA/NASA/Hubble

    Research conducted by scientists at Rochester Institute of Technology rules out a challenge to the accepted standard model of the universe and theory of how galaxies form by shedding new light on a problematic structure...

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    Dark Energy Survey finds 8 more faint celestial objects near our Milky Way Galaxy.

    August 18, 2015, Categories  Astronomy/Space

    The Dark Energy Survey has now mapped one-eighth of the full sky (red shaded region) using the Dark Energy Camera on the Blanco telescope at the Cerro Tololo Inter-American Observatory in Chile (foreground). This map has led to the discovery of 17 dwarf galaxy candidates in the past six months (red dots), including eight new candidates announced today. Several of the candidates are in close proximity to the two largest dwarf galaxies orbiting the Milky Way, the Large and Small Magellanic Clouds, both of which are visible to the unaided eye. By comparison, the new stellar systems are so faint that they are difficult to "see" even in the deep DES images and can be more easily visualized using maps of the stellar density (inset). Fourteen of the dwarf galaxy candidates found in DES data are visible in this particular image. Credit: Illustration: Dark Energy Survey Collaboration

    The Dark Energy Survey has now mapped one-eighth of the full sky (red shaded region) using the Dark Energy Camera on the Blanco telescope at the Cerro Tololo Inter-American Observatory in Chile (foreground). This map has led to the discovery of 17 dwarf galaxy candidates in the past six months (red dots), including eight new candidates announced today. Several of the candidates are in close proximity to the two largest dwarf galaxies orbiting the Milky Way, the Large and Small Magellanic Clouds, both of which are visible to the unaided eye. By comparison, the new stellar systems are so faint that they are difficult to “see” even in the deep DES images and can be more easily visualized using maps of the stellar density (inset)...

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