Browsing by Author "Drew, J.E."

Now showing items 61-80 of 146

    • The ionization state of the winds from cataclysmic variables without classical boundary layers 

      Hoare, M.G.; Drew, J.E. (1993)
      We have calculated a grid of detailed photoionization models for the stellar winds in non-magnetic cataclysmic variables. In the light of evidence which questions the existence of a classical hot, luminous boundary layer ...

    • The ionized nebula surrounding the red supergiant W26 in westerlund 1 

      Wright, N.J.; Wesson, R.; Drew, J.E.; Barentsen, G.; Barlow, M.J.; Walsh, J.R.; Zijlstra, A.; Drake, J.J.; Eisl̈offel, J.; Farnhill, H.J. (2014-01)
      We present Hα images of an ionized nebula surrounding theM2-5Ia red supergiant (RSG)W26 in the massive star cluster Westerlund 1. The nebula consists of a circumstellar shell or ring ̃0.1 pc in diameter and a triangular ...

    • IPHAS A-type stars with mid-infrared excesses in Spitzer surveys 

      Hales, A.; Barlow, M.J.; Drew, J.E.; Unruh, Y.C.; Greimel, R.; Irwin, M.J.; Gonzalez-Solares, E. (2009)

    • IPHAS and the symbiotic stars 1: selection method and first discoveries 

      Corradi, R.L.M.; Rodriguez-Flores, E.R.; Mampaso, A.; Greimel, R.; Viironen, K.; Drew, J.E.; Lennon, D.J.; Mikolajewska, J.; Sabin, L.; Sokoloski, J. (2008)

    • 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.

    • IPHAS discoveries of young stars towards Cyg OB2 and its southern periphery 

      Vink, J.S.; Drew, J.E.; Steeghs, D.; Wright, Nick; Martin, E.L.; Gansicke, B.T.; Greimel, R.; Drake, J. (2008)
      We report on the discovery of over 50 strong Hα emitting objects towards the large OB association Cyg OB2 and the H ii region DR 15 on its southern periphery. This was achieved using the INT Photometric Hα Survey of the ...

    • IPHAS extinction distances to planetary nebulae 

      Giammanco, C.; Sale, S.E.; Corradi, R.L.M.; Barlow, M.J.; Viironen, K.; Sabin, L.; Santander-Garcia, M.; Frew, D.J.; Greimel, R.; Miszalski, B.; Phillipps, S.; Zijlstra, A.A.; Mampaso, A.; Drew, J.E.; Parker, Q.A.; Napiwotzki, R. (2011)
      Aims. The determination of reliable distances to planetary nebulae (PNe) is a major difficulty in the study of this class of objects in the Galaxy. The availability of new photometric surveys such as IPHAS (the INT/WFC ...

    • An IPHAS-based search for accreting very low-mass objects using VO tools 

      Valdivielso, L.; Martin, E.L.; Bouy, H.; Solano, E.; Drew, J.E.; Greimel, R.; Gutierrez, R.; Unruh, Y.C.; Vink, J.S. (2009)
      Context. The main goal of this paper is to prove that accreting very low-mass stars and brown dwarfs can be identified in IPHAS, an H emission survey of the northern Milky Way. Full exploitation of the IPHAS database and ...

    • 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 ...

    • Line-driven disc wind models with an improved line force 

      Proga, D.; Stone, J.M.; Drew, J.E. (1999)
      We describe an efficient method of calculating the radiation pressure due to spectral lines, including all the terms in the velocity gradient tensor. We apply this method to calculate the two-dimensional, time-dependent ...

    • Linear Line Polarimetry Modelling of Pre-main Sequence Stars 

      Vink, J.S.; Drew, J.E.; Harries, T.J.; Oudmaijer, R.D. (Astronomical Society of the Pacific, 2005)
      We present emission line polarimetry data and modelling relevant to the circumstellar geometry and kinematics around pre-main sequence stars. For a sample of both Herbig Ae/Be stars and T Tauri stars, we find that most ...

    • Linear Spectropolarimetry of Young and Other Emission Line Stars 

      Drew, J.E.; Vink, J.S.; Harries, T.J.; Kurosawa, R.; Oudmaijer, R.D. (2005)

    • The massive star population of Cygnus OB2 

      Wright, Nick; Drew, J.E.; Mohr-Smith, M. (2015-05-01)
      We have compiled a significantly updated and comprehensive census of massive stars in the nearby Cygnus OB2 association by gathering and homogenizing data from across the literature. The census contains 169 primary OB ...

    • The massive star-forming region Cygnus OB2. II - integrated stellar properties and the star formation history 

      Wright, Nick; Drake, J.; Drew, J.E.; Vink, J.S. (2010)
      Cygnus OB2 is the nearest example of a massive star-forming region (SFR), containing over 50 O-type stars and hundreds of B-type stars. We have analyzed the properties of young stars in two fields in Cyg OB2 using the ...

    • MWC 297, B1.5Ve : a zero-age main sequence star in the Aquila Rift 

      Drew, J.E.; Busfield, G.; Hoare, M.G.; Murdoch, K.A.; Nixon, C.A.; Oudmaijer, R.D. (1997)

    • Near-infrared line spectropolarimetry of hot massive stars 

      Oudmaijer, R.D.; Drew, J.E.; Vink, J.S. (2005)
      In order to study the inner parts of the circumstellar material around optically faint, infrared bright objects, we present the first medium-resolution spectropolarimetric data taken in the near-infrared. In this paper we ...

    • Near-IR spectra of IPHAS extremely red Galactic AGB stars 

      Wright, Nick; Barlow, M.J.; Greimel, R.; Drew, J.E.; Matsuura, M.; Unruh, Y.C.; Zijlstra, A.A. (2009)
      We present a library of 139 near-IR spectra of cool asymptotic giant branch stars that will be useful for comparison with theoretical model atmosphere calculations and for modelling the integrated emission from intermediate-age ...

    • The Necklace : equatorial and polar outflows from the binary central star of the new planetary nebula IPHASX J194359.5+170901 

      Corradi, R. L. M.; Sabin, L.; Miszalski, B.; Rodriguez-Gil, P.; Santander-Garcia, M.; Jones, D.; Drew, J.E.; Mampaso, A.; Barlow, M.J.; Rubio-Diez, M. M.; Casares, J.; Viironen, K.; Frew, D. J.; Giammanco, C.; Greimel, R.; Sale, S. E. (2011-01)
      IPHASX J194359.5+170901 is a new high-excitation planetary nebula with remarkable characteristics. It consists of a knotty ring expanding at a speed of 28 km s-1, and a fast collimated outflow in the form of faint lobes ...

    • The New Contact Binary GSC 2414-0797 

      Robb, R.M.; Vincent, J.; Henderson, H.; Greimel, R.; Drew, J.E.; Gonzalez-Solares, E. (2008)
      GSC 2414-0797 has a contact binary star type light curve, a 0.4 magnitude brightness variation with a period 0.3406 days.