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The disc and bulge of the Milky Way

(Drew, Lucas, Thompson)

With the rise and rise of computing capability, very large scale surveying of the content of our own galaxy, the Milky Way, has become achievable.

Within CAR, staff and students are working with and have leading roles in a number of mainly imaging surveys targeting all or a large fraction of the main mass components of the Milky Way, the disc and bulge. Listed in order of increasing wavelength these are

  • vphas + — broadband optical and Hα, southern 天空
  • UVEX和 iphas —  broadband optical and Hα, northern 天空
  • VVV and VVVX — multi-epoch broadband near-infrared, southern
    天空
  • ukidss / GPS (www.ukidss.org) - broadband near-infrared, northern 天空
  • SASSy — sub-millimetre broadband, northern 天空

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These survey activities stimulate a range of follow-up observational programmes, including spectroscopy aimed at e.g. refined classification of survey-selected objects or at measurements of radial velocities to support kinematic modelling of Galactic structures (be they stars or molecular clouds).

Carina Nebula

ESO postcard of the heart of the Carina Nebula, part of the spectacular star-forming region seen end-on along the Carina Arm of the Milky Way. This image was obtained with the VST through filters including the Hα filter bought for the vphas + survey.