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Death in the Sky: M31 Shreds its Satellites

29 Jan 2010, 16:36 UTC
Death in the Sky: M31 Shreds its Satellites
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An international team of astronomers has identified two new tidal streams in M31, the Andromeda galaxy. They are more-or-less intact remnants of dwarf galaxies that M31 has otherwise ripped to shreds.
One team – using the Suprime-Cam camera on Subaru – discovered two new dwarf galaxy shards by mapping the sky density of red giants in [...]

False-color map of the density of red giants in M31 (Star count map credit: Mikito Tanaka, Tohoku University)
An international team of astronomers has identified two new tidal streams in M31, the Andromeda galaxy. They are more-or-less intact remnants of dwarf galaxies that M31 has otherwise ripped to shreds.
One team – using the Suprime-Cam camera on Subaru – discovered two new dwarf galaxy shards by mapping the sky density of red giants in M31's outskirts; the other – using the DEIMOS spectrograph on Keck II – separated the M31 red giant wheat from the Milky Way chaff.
(...)Read the rest of Death in the Sky: M31 Shreds its Satellites (861 words)

© Jean Tate for Universe Today, 2010. |
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Post tags: Andromeda, dwarf galaxies, galaxy formation, M31, tidal streams

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