Browsing by Author "Drake, J.J."

Now showing items 1-9 of 9

    • First results of an Hα based search of classical Be stars in the Perseus Arm and beyond 

      Raddi, R.; Drew, J.E.; Farnhill, H.J.; Fabregat, J.; Steeghs, D.; Wright, N.J.; Drake, J.J.; Sale, S.E.; Barlow, M.J.; Greimel, R.; Sabin, L.; Corradi, R.M.L. (2013-04)
      We investigate a region of the Galactic plane, between 120° ≤ l ≤ 140° and-1° ≤ b≤+4°, and uncover a population of moderately reddened (E(B-V) ~ 1) classical Be stars within and beyond the Perseus and Outer Arms. 370 ...

    • The interactions of winds from massive young stellar objects : X-ray emission, dynamics and cavity evolution 

      Parkin, E.R.; Pittard, J.M.; Hoare, M.G.; Wright, N.J.; Drake, J.J. (2009-12-01)
      Two-dimensional axis-symmetric hydrodynamical simulations are presented which explore the interaction of stellar and disc winds with surrounding infalling cloud material. The star and its accompanying disc blow winds inside ...

    • 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 ...

    • The massive star-forming region Cygnus OB2. I : Chandra catalog of association members 

      Wright, N.J.; Drake, J.J. (2009)
      We present a catalog of 1696 X-ray sources detected in the massive star-forming region (SFR) Cygnus OB2 and extracted from two archival Chandra observations of the center of the region. A deep source extraction routine, ...

    • Optical photometric GTC/OSIRIS observations of the young massive association Cygnus OB2 

      Guarcello, M.G.; Wright, N.J.; Drake, J.J.; Aldcroft, T.; Kashyap, V.L.; García-Alvarez, D.; Drew, J.E. (2012-10-01)
      In order to fully understand the gravitational collapse of molecular clouds, the star formation process, and the evolution of circumstellar disks, these phenomena must be studied in different Galactic environments with a ...

    • Osiris deep imaging of cygnus OB2 : The stellar population of the cygnus X central engine 

      Guarcello, M.G.; Drake, J.J.; Wright, N.J.; Aldcroft, T.; Fruscione, A.; Kashyap, V.L.; García-Álvarez, D.; Drew, J.E. (2013)
      The young massive cluster Cyg OB2 is the closest massive star forming region to the Sun, with hundreds of OB members, and then the best target in the Milky Way to study the feedback of massive stars on the star formation ...

    • Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey 

      Verbeek, K.; Groot, P.J.; Scaringi, S.; Nelemans, G.; Napiwotzki, R.; Spikings, B.; Drew, J.E.; Østensen, R.H.; Steeghs, D.; Gänsicke, B.T.; Casares, J.; Corral-Santana, J.M.; Corradi, R.L.M.; Deacon, Niall; Drake, J.J.; González-Solares, E.; Irwin, M.J.; Greimel, R.; Heber, U.; Knigge, C. (2012-10-21)
      We present the results of the first spectroscopic follow-up of 132 optically blue ultraviolet (UV)-excess sources selected from the UV-Excess Survey of the Northern Galactic Plane (UVEX). The UV-excess spectra are classified ...

    • Stellar x-ray sources in the chandra cosmos survey 

      Wright, N.J.; Drake, J.J.; Civano, F. (2010-12-10)
      We present an analysis of the X-ray properties of a sample of solar- and late-type field stars identified in the Chandra Cosmic Evolution Survey (COSMOS), a deep (160 ks) and wide (∼0.9 deg ) extragalactic survey. The ...

    • The stellar-activity-rotation relationship and the evolution of stellar dynamos 

      Wright, N.J.; Drake, J.J.; Mamajek, E.E.; Henry, G.W. (2011-12-10)
      We present a sample of 824 solar and late-type stars with X-ray luminosities and rotation periods. This is used to study the relationship between rotation and stellar activity and derive a new estimate of the convective ...