Browsing Research publications by Author "Groot, P."

Now showing items 1-20 of 21

    • Detection of new planetary nebulae by IPHAS, the Hα survey of the North Galactic plane 

      Corradi, R.L.M.; Greimel, R.; Leisy, P.; Mampaso, A.; Viironen, K.; Kovacevic, A.; Morris, R.; Phillipps, S.; Zijlstra, A.; Irwin, J.; Drew, J.E.; Hopewell, E.C.; Wright, N.; Barlow, M.; Irwin, M.; Walton, N.; Frew, D.J.; Parker, Q. A.; Groot, P.; Sokoloski, J.L.; Zurita, A. (American Institute of Physics (AIP), 2005-11-28)
      IPHAS is an ongoing Hα imaging survey of the North Galactic plane. When completed, it is expected to discover several hundred new Galactic planetary nebulae, in addition to a huge number of Hα emitters. We present here the ...

    • Discovering interacting binaries with Halpha surveys 

      Witham, A.R.; Knigge, C.; Drew, J.E.; Groot, P.; Greimel, R.; Parker, Q.A. (2004)

    • Discovering interacting binaries with Hα surveys 

      Witham, A.R.; Knigge, C.; Drew, J.E.; Groot, P.; Greimel, R.; Parker, Q. A. (American Institute of Physics (AIP), 2005)
      A deep (R ~ 19.5) photographic Hα Survey of the southern Galactic Plane was recently completed using the UK Schmidt Telescope at the AAO. In addition, we have recently started a similar, CCD-based survey of the northern ...

    • Extremely red stellar objects revealed by IPHAS 

      Wright, Nick; Greimel, R.; Barlow, M.J.; Drew, J.E.; Cioni, M-R.L.; Zijlstra, A.A.; Corradi, R.L.M.; Gonzalez-Solares, E.; Groot, P.; Irwin, J.; Irwin, M.J.; Mampaso, A.; Morris, R.A.H.; Steeghs, D.; Unruh, Y.C.; Walton, N.A. (2008)
      We present photometric analysis and follow-up spectroscopy for a population of extremely red stellar objects extracted from the point-source catalogue of the INT Photometric H Survey (IPHAS) of the northern galactic plane. ...

    • First release of the IPHAS catalogue of new extended planetary nebulae 

      Sabin, L.; Parker, Q. A.; Corradi, R.L.M.; Guzman-Ramirez, L.; Morris, R.A.H.; Zijlstra, A.A.; Bojičić, I. S.; Frew, D. J.; Guerrero, M.; Stupar, M.; Barlow, M. J.; Cortés Mora, F.; Drew, J.E.; Greimel, R.; Groot, P.; Irwin, J. M.; Irwin, M. J.; Mampaso, A.; Miszalski, B.; Olguín, L.; Phillipps, S.; García, M. Santander; Viironen, K.; Wright, N. J. (2014-10-01)
      We present the first results of our search for new, extended planetary nebulae (PNe) based on careful, systematic, visual scrutiny of the imaging data from the Isaac Newton Telescope Photometric Ha Survey of the Northern ...

    • Fractalkine is expressed by smooth muscle cells in response to IFN-gamma and TNF-alpha and is modulated by metalloproteinase activity 

      Ludwig, A.; Berkhout, Theo; Moores, K.; Groot, P.; Chapman, G. (2002-01-15)
      Fractalkine/CX3C-chemokine ligand 1 is expressed as a membrane-spanning adhesion molecule that can be cleaved from the cell surface to produce a soluble chemoattractant. Within the vasculature, fractalkine is known to be ...

    • High spatial resolution Galactic 3D extinction mapping with IPHAS 

      Sale, S.E.; Drew, J.E.; Unruh, Y.C.; Irwin, M.J.; Knigge, C.; Phillips, S.; Zijlstra, A.A.; Gansicke, B.T.; Greimel, R.; Groot, P.; Mampaso, A.; Morris, R.A.H.; Napiwotzki, R.; Steeghs, D.; Walton, N.A. (2009)
      We present an algorithm (MEAD, for ‘Mapping Extinction Against Distance’) which will determine intrinsic (r′−i′) colour, extinction, and distance for early-A to K4 stars extracted from the IPHAS r′/i′/Hα photometric data ...

    • Initial Data Release from the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS) 

      Gonzalez-Solares, E.; Walton, N.A.; Greimel, R.; Drew, J.E.; Irwin, M.J.; Sale, S.E.; Andrews, K.; Aungwerojwit, A.; Barlow, M.J.; van den Besselaar, E.; Corradi, R.L.M.; Gaensicke, B.T.; Groot, P.; Hales, A.; Hopewell, E.C.; Hu, H.; Irwin, J.; Knigge, C.; Lagadec, E.; Leisy, P.; Lewis, J.R.; Mampaso, A.; Matsuura, M.; Moont, B.; Morales-Rueda, L.; Morris, R.A.H.; Naylor, T.; Parker, Q. A.; Prema, P.; Pyrzas, S.; Rixon, G.T.; Rodriguez-Gil, P.; Roelofs, G.; Sabin, L.; Skillen, I.; Suso, J.; Tata, R.; Viironen, K.; Vink, J.S.; Witham, A.; Wright, Nick; Zijlstra, A.A.; Zurita, A.; Drake, J.; Fabregat, J.; Lennon, D.J.; Lucas, P.W.; Martin, E.L.; Phillipps, S.; Steeghs, D.; Unruh, Y.C. (2008)
      The INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) is an imaging survey being carried out in Hα, r′ and i′ filters, with the Wide Field Camera (WFC) on the 2.5-m Isaac Newton Telescope (INT) to a depth ...

    • The INT Photometric Ha Survey of the Northern Galactic Plane (IPHAS) 

      Drew, J.E.; Greimel, R.; Irwin, M.J.; Aungwerojwit, A.; Barlow, M.J.; Corradi, R.L.M.; Drake, J.; Gansicke, B.T.; Groot, P.; Hales, A.; Hopewell, E.C.; Irwin, J.; Knigge, C.; Leisy, P.; Lennon, D.J.; Mampaso, A.; Masheder, M.R.W.; Matsuura, M.; Morales-Rueda, L.; Morris, R.A.H.; Parker, Q.A.; Phillipps, S.; Rodriguez-Gil, P.; Roelofs, G.; Skillen, I.; Sokoloski, J.; Steeghs, D.; Unruh, Y.C.; Viironen, K.; Vink, J.S.; Walton, N.A.; Witham, A.R.; Wright, Nick; Zijlstra, A.A.; Zurita, A. (2005)

    • IPHAS and the symbiotic stars. II. New discoveries and a sample of the most common mimics 

      Corradi, R.L.M.; Valentini, M.; Munari, U.; Drew, J.E.; Rodriguez-Flores, E.R.; Viironen, K.; Greimel, R.; Santander-Garcia, M.; Sabin, L.; Mampaso, A.; Parker, Q.A.; De Pew, K.; Sale, S.E.; Unruh, Y.C.; Vink, J.S.; Rodriguez-Gil, P.; Barlow, M.J.; Lennon, D.J.; Groot, P.; Giammanco, C.; Zijlstra, A.A.; Walton, N.A. (2010)
      Context. Knowledge of the total population of symbiotic stars in the Galaxy is important for understanding basic aspects of stellar evolution in interacting binaries and the relevance of this class of objects in the formation ...

    • The IPHAS catalogue of Hα emission-line sources in the northern Galactic plane 

      Witham, A.R.; Knigge, C.; Drew, J.E.; Greimel, R.; Steeghs, D.; Gansicke, B.T.; Groot, P.; Mampaso, A. (2008)
      We present a catalogue of point-source Hα emission-line objects selected from the INT/WFC Photometric Hα Survey (IPHAS) of the northern Galactic plane.

    • The IPHAS-POSS-I proper motion survey of the Galactic plane 

      Deacon, Niall; Groot, P.; Drew, J.E.; Greimel, R.; Hambly, N.C.; Irwin, M.J.; Aungwerojwit, A.; Drake, J.; Steeghs, D. (2009)
      We present a proper motion survey of the Galactic plane, using Isaac Newton Telescope (INT) Photometric Hα Survey (IPHAS) data and Palomar Sky Survey (POSS)-I Schmidt plate data as a first epoch, that probes down to proper ...

    • New OB star candidates in the Carina Arm around Westerlund 2 from VPHAS+ 

      Mohr-Smith, M.; Drew, J.E.; Barentsen, G.; Wright, N. J.; Napiwotzki, R.; Corradi, R.L.M.; Eislöffel, J.; Groot, P.; Kalari, V.; Parker, Q. A.; Raddi, Roberto; Sale, S. E.; Unruh, Y.C.; Vink, J. S.; Wesson, R. (2015-07-11)
      O and early B stars are at the apex of galactic ecology, but in the Milky Way, only a minority of them may yet have been identified. We present the results of a pilot study to select and parametrise OB star candidates in ...

    • New young planetary nebulae in IPHAS 

      Viironen, K.; Mampaso, A.; Corradi, R.L.M.; Rodriguez, M.; Greimel, R.; Sabin, L.; Sale, S.E.; Unruh, Y.C.; Delgado-Inglada, G.; Drew, J.E.; Giammanco, C.; Groot, P.; Parker, Q.A.; Sokoloski, J.; Zijlstra, A.A. (2009)
      Aims. We search for very small-diameter galactic planetary nebulae (PNe) representing the earliest phases of PN evolution. The IPHAS catalogue of H-emitting stars provides a useful basis for this study since all sources ...

    • Newly discovered cataclysmic variables from the INT/WFC photometric Ha survey of the northern Galactic plane 

      Witham, A.R.; Knigge, C.; Aungwerojwit, A.; Drew, J.E.; Gansicke, B.T.; Greimel, R.; Groot, P.; Roelofs, G.; Steeghs, D.; Woudt, P. (2007)

    • A planetary nebula around Nova V458 Vulpeculae undergoing flash ionization 

      Wesson, R.; Barlow, M.J.; Corradi, R.L.M.; Drew, J.E.; Groot, P.; Knigge, C.; Steeghs, D.; Gaensicke, B.T.; Napiwotzki, R.; Rodriguez-Gil, P.; Zijlstra, A.A.; Bode, M.F.; Drake, J.; Frew, D.J.; Gonzalez-Solares, E.; Greimel, R.; Irwin, M.J.; Morales-Rueda, L.; Nelemans, G.; Parker, Q.A.; Sale, S.E. (2008)

    • The properties of cataclysmic variables in photometric Ha surveys 

      Witham, A.R.; Knigge, C.; Gansicke, B.T.; Aungwerojwit, A.; Corradi, R.M.; Drew, J.E.; Greimel, R.; Groot, P.; Morales-Rueda, L.; Rodriguez-Flores, E.R.; Rodriguez-Gil, P.; Steeghs, D. (2006)

    • The second data release of the INT Photometric Hα Survey of the Northern Galactic Plane (IPHAS DR2) 

      Barentsen, Geert; Farnhill, Hywel John; Drew, J.E.; Gonzalez-Solares, E.A.; Greimel, R.; Irwin, M.J.; Miszalski, Brent; Ruhland, Christine; Groot, P.; Mampaso, A.; Sale, S. E.; Henden, A.A.; Aungwerojwit, A.; Barlow, M.J.; Carter, P.R.; Corradi, R.L.M.; Drake, J. J.; Eisloffel, J.; Fabregat, J.; Gansicke, B.T.; Gentile Fusillo, N. P.; Greiss, S.; Hales, A.S.; Hodgkin, S.; Huckvale, L.; Irwin, J.; King, R.; Knigge, C.; Kupfer, T.; Lagadec, E.; Lennon, D.J.; Lewis, J.R.; Mohr-Smith, M.; Morris, R.A.H.; Naylor, T.; Parker, Q. A.; Phillipps, S.; Pyrzas, S.; Raddi, Roberto; Roelofs, G.; Rodriguez-Gil, P.; Sabin, L.; Scaringi, Simone; Steeghs, D.; Suso, J.; Tata, R.; Unruh, Y.C.; van Roestel, J.; Viironen, K.; Vink, J.S.; Walton, N.A.; Wright, Nick; Zijlstra, A.A. (2014-11-11)
      The INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) is a 1800 deg2 imaging survey covering Galactic latitudes |b| < 5° and longitudes ℓ = 30°–215° in the r, i, and Hα filters using the Wide Field Camera ...

    • The structure of the outer Galactic disc as revealed by IPHAS early A stars 

      Sale, S.E.; Drew, J.E.; Knigge, C.; Zijlstra, A.A.; Irwin, M.J.; Morris, R.A.H.; Phillipps, S.; Drake, J.; Greimel, R.; Unruh, Y.C.; Groot, P.; Mampaso, A.; Walton, N.A. (2010)
      This study is an investigation of the stellar density profile of the Galactic disc in the anticentre direction. We select over 40 000 early A stars from INT/WFC Photometric Hα Survey of the Northern Galactic Plane (IPHAS) ...

    • The UV-excess survey of the northern galactic plane 

      Groot, P.; Verbeek, K.; Greimel, R.; Irwin, M.J.; Gonzalez-Solares, E.; Gansicke, B.T.; De Groot, E.; Drew, J.E.; Napiwotzki, R.; Weston, S.; Deacon, Niall (2009)
      The UV-Excess survey of the northern Galactic plane images a 10°× 185° wide band, centred on the Galactic equator using the 2.5-m Isaac Newton Telescope in four bands ( U, g, r, He i 5875) down to ∼21–22 mag ( ~20 in He i ...