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Article: The VST photometric hα survey of the Southern Galactic Plane and Bulge (VPHAS+)

TitleThe VST photometric hα survey of the Southern Galactic Plane and Bulge (VPHAS+)
Authors
KeywordsStars: general
Surveys
Planetary nebulae: general
H II regions
Galaxy: bulge
Galaxy: disc
Issue Date2014
Citation
Monthly Notices of the Royal Astronomical Society, 2014, v. 440, n. 3, p. 2036-2058 How to Cite?
AbstractThe VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+) is surveying the southern Milky Way in u, g, r, i and Hα at ~1 arcsec angular resolution. Its footprint spans the Galactic latitude range -5o < b < +5° at all longitudes south of the celestial equator. Extensions around the Galactic Centre to Galactic latitudes ±10° bring in much of the Galactic bulge. This European Southern Observatory public survey, begun on 2011 December 28, reaches down to ~20th magnitude (10σ) and will provide single-epoch digital optical photometry for ~300 million stars. The observing strategy and data pipelining are described, and an appraisal of the segmented narrow-band Hα filter in use is presented. Using model atmospheres and library spectra, we compute main-sequence (u - g), (g - r), (r - i) and (r - Hα) stellar colours in the Vega system. We report on a preliminary validation of the photometry using test data obtained from two pointings overlapping the Sloan Digital Sky Survey. An example of the (u - g, g - r) and (r - Hα, r - i) diagrams for a full VPHAS+ survey field is given. Attention is drawn to the opportunities for studies of compact nebulae and nebular morphologies that arise from the image quality being achieved. The value of the u band as the means to identify planetary-nebula central stars is demonstrated by the discovery of the central star of NGC 2899 in survey data. Thanks to its excellent imaging performance, the VLT Survey Telescope (VST)/OmegaCam combination used by this survey is a perfect vehicle for automated searches for reddened early-type stars, and will allow the discovery and analysis of compact binaries, white dwarfs and transient sources. © The Authors 2014. Published by Oxford University Press on behalf of The Royal Astronomical Society.
Persistent Identifierhttp://hdl.handle.net/10722/209029
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806

 

DC FieldValueLanguage
dc.contributor.authorDrew, Janet E.-
dc.contributor.authorGonzález-Solares, Eduardo A.-
dc.contributor.authorGreimel, Robert-
dc.contributor.authorIrwin, Mike J.-
dc.contributor.authorKüpcü Yoldaş, A.-
dc.contributor.authorLewis, Jim R.-
dc.contributor.authorBarentsen, Geert-
dc.contributor.authorEislöffel, Jochen-
dc.contributor.authorFarnhill, Hywel J.-
dc.contributor.authorMartin, William E.-
dc.contributor.authorWalsh, Jeremy R.-
dc.contributor.authorWalton, Nicholas A.-
dc.contributor.authorMohr-Smith, M.-
dc.contributor.authorRaddi, Roberto-
dc.contributor.authorSale, Stuart E.-
dc.contributor.authorWright, Nicholas J.-
dc.contributor.authorGroot, Paul J.-
dc.contributor.authorBarlow, Michael J.-
dc.contributor.authorCorradi, Romano L M-
dc.contributor.authorDrake, Jeremy J.-
dc.contributor.authorFabregat, Juan Beltrán-
dc.contributor.authorFrew, David J.-
dc.contributor.authorGänsicke, Boris T.-
dc.contributor.authorKnigge, Christian-
dc.contributor.authorMampaso, Antonio-
dc.contributor.authorMorris, R. A H-
dc.contributor.authorNaylor, Tim T.-
dc.contributor.authorParker, Quentin A.-
dc.contributor.authorPhillipps, Steven-
dc.contributor.authorRuhland, Christine-
dc.contributor.authorSteeghs, Danny T H-
dc.contributor.authorUnruh, Yvonne C.-
dc.contributor.authorVink, Jorick S.-
dc.contributor.authorWesson, Roger-
dc.contributor.authorZijlstra, Albert A.-
dc.date.accessioned2015-03-23T02:31:13Z-
dc.date.available2015-03-23T02:31:13Z-
dc.date.issued2014-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2014, v. 440, n. 3, p. 2036-2058-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/209029-
dc.description.abstractThe VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+) is surveying the southern Milky Way in u, g, r, i and Hα at ~1 arcsec angular resolution. Its footprint spans the Galactic latitude range -5o < b < +5° at all longitudes south of the celestial equator. Extensions around the Galactic Centre to Galactic latitudes ±10° bring in much of the Galactic bulge. This European Southern Observatory public survey, begun on 2011 December 28, reaches down to ~20th magnitude (10σ) and will provide single-epoch digital optical photometry for ~300 million stars. The observing strategy and data pipelining are described, and an appraisal of the segmented narrow-band Hα filter in use is presented. Using model atmospheres and library spectra, we compute main-sequence (u - g), (g - r), (r - i) and (r - Hα) stellar colours in the Vega system. We report on a preliminary validation of the photometry using test data obtained from two pointings overlapping the Sloan Digital Sky Survey. An example of the (u - g, g - r) and (r - Hα, r - i) diagrams for a full VPHAS+ survey field is given. Attention is drawn to the opportunities for studies of compact nebulae and nebular morphologies that arise from the image quality being achieved. The value of the u band as the means to identify planetary-nebula central stars is demonstrated by the discovery of the central star of NGC 2899 in survey data. Thanks to its excellent imaging performance, the VLT Survey Telescope (VST)/OmegaCam combination used by this survey is a perfect vehicle for automated searches for reddened early-type stars, and will allow the discovery and analysis of compact binaries, white dwarfs and transient sources. © The Authors 2014. Published by Oxford University Press on behalf of The Royal Astronomical Society.-
dc.languageeng-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.subjectStars: general-
dc.subjectSurveys-
dc.subjectPlanetary nebulae: general-
dc.subjectH II regions-
dc.subjectGalaxy: bulge-
dc.subjectGalaxy: disc-
dc.titleThe VST photometric hα survey of the Southern Galactic Plane and Bulge (VPHAS+)-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1093/mnras/stu394-
dc.identifier.scopuseid_2-s2.0-84898801245-
dc.identifier.volume440-
dc.identifier.issue3-
dc.identifier.spage2036-
dc.identifier.epage2058-
dc.identifier.eissn1365-2966-

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