Browsing by Author "Drake, J. J."

Now showing items 1-7 of 7

    • A and F stars as probes of outer Galactic disc kinematics 

      Harris, A.; Drew, J. E.; Farnhill, H. J.; Monguió, M.; Gebran, M.; Wright, N. J.; Drake, J. J.; Sale, S. E. (2018-04-01)
      Previous studies of the rotation law in the outer Galactic disc have mainly used gas tracers or clump giants. Here, we explore A and F stars as alternatives: these provide a much denser sampling in the outer disc than gas ...

    • Classical T Tauri stars with VPHAS+ -I : H α and u-band accretion rates in the Lagoon Nebula M8 

      Kalari, V. M.; Vink, J. S.; Drew, J.E.; Barentsen, G.; Drake, J. J.; Eislöffel, J.; Martín, E.L.; Parker, Q. A.; Unruh, Y.C.; Walton, N. A.; Wright, N. J. (2015-10-11)
      We estimate the accretion rates of 235 Classical T Tauri star (CTTS) candidates in the Lagoon Nebula using $ugri$H$\alpha$ photometry from the VPHAS+ survey. Our sample consists of stars displaying H$\alpha$-excess, the ...

    • A deep catalogue of classical Be stars in the direction towards the Perseus Arm : spectral types and interstellar reddenings 

      Raddi, Roberto; Drew, J.E.; Steeghs, D. T. H.; Wright, Nick; Drake, J. J.; Barentsen, Geert; Fabregat, J.; Sale, S. E. (2015-01)
      We present a catalogue of 247 photometrically and spectroscopically confirmed fainter classical Be stars (13 ≲ r ≲ 16) in the direction of the Perseus Arm of the Milky Way (−1° < b < +4°, 120° < ℓ < 140°). The catalogue ...

    • Diffuse X-Ray Emission in the Cygnus OB2 Association 

      Albacete-Colombo, J. F.; Drake, J. J.; Flaccomio, E.; Wright, N. J.; Kashyap, V.; Guarcello, M. G.; Briggs, K.; Drew, J. E.; Fenech, D. M.; Micela, G.; McCollough, M.; Prinja, R. K.; Schneider, N.; Sciortino, S.; Vink, J. S. (2023-11-01)
      We present a large-scale study of diffuse X-ray emission in the nearby massive stellar association Cygnus OB2 as part of the Chandra Cygnus OB2 Legacy Program. We used 40 Chandra X-ray ACIS-I observations covering ∼1.0 ...

    • Physical parameters of IPHAS-selected classical Be stars. (I. Determination procedure and evaluation of the results.) 

      Gkouvelis, L.; Fabregat, J.; Zorec, J.; Steeghs, D.; Drew, J. E.; Raddi, R.; Wright, N. J.; Drake, J. J. (2016-07-01)
      We present a semi-automatic procedure to obtain fundamental physical parameters and distances of classical Be (CBe) stars, based on the Barbier-Chalonge-Divan (BCD) spectrophotometric system. Our aim is to apply this ...

    • 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 ...

    • T Tauri candidates and accretion rates using IPHAS : method and application to IC 1396 

      Barentsen, Geert; Vink, Jorick S.; Drew, J.E.; Greimel, R.; Wright, Nick; Drake, J. J.; Martin, E.L.; Valdivielso, L.; Corradi, R.L.M. (2011-07)
      The Isaac Newton Telescope (INT) Photometric H-Alpha Survey (IPHAS) is a 1800 deg(2) survey of the Northern Galactic Plane, reaching down to r' similar to 21. We demonstrate how the survey can be used to (1) reliably select ...