S315p.237 — Mapping the Milky Way in visible light: the IPHAS, UVEX and VPHAS+ surveys

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Aug 4th at 6:00 PM until 6:00 PM

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Author(s): Geert Barentsen1, Janet Drew3, Paul Groot2, The EGAPS team3

Institution(s): 1. NASA Ames Research Center, 2. Radboud University Nijmegen, 3. University of Hertfordshire

Our knowledge of the organisation of the Plane of our own galaxy, is in certain respects more uncertain than that of our nearest neighbours in the Local Group. The European Galactic Plane Surveys (EGAPS) aim to transform this situation by mapping the entire Galactic Plane at latitudes |b| < 5 deg in five optical bands (u, g, r, i, H-alpha), to a limiting magnitude of 21. The project is composed of one survey in the South (VPHAS+; www.vphasplus.org) and two in the North (IPHAS and UVEX; www.iphas.org and www.uvexsurvey.org).
One
of the project's unique strengths is the combination of the broad-band filters with a narrow H-alpha filter, which is being used to (i) identify emission-line objects in key phases of stellar evolution, and (ii) constrain the spectral types and extinctions for large samples of stars near the main sequence. These capabilities enable homogeneous tests of star formation across interstellar clouds, and allow the 3D structure of dust extinction to be mapped at a high resolution on a galactic scale.
This poster will summarize the surveys' recent public data releases, and highlight how the data complements Plane surveys and star formation studies carried out at longer wavelengths.