Browsing by Author "Drew, J.E."

Now showing items 81-100 of 146

    • 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 ...

    • A new planetary nebula in the outer reaches of the galaxy 

      Viironen, K.; Mampaso, A.; Corradi, R.L.M.; Drew, J.E.; Frew, D.J.; Giammanco, C.; Greimel, R.; Liimets, T.; Lindberg, J.E.; Rodriguez, M.; Sabin, L.; Sale, S.E.; Wilson, P.A.; Zijlstra, A.A. (2011)
      Aims. A proper determination of the abundance gradient in the Milky Way requires the observation of objects at large galactiocentric distances. With this aim, we are exploring the planetary nebula population towards the ...

    • 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 nitrogen-enriched nebular around P-Cygni 

      Johnson, D.R.H.; Barlow, M.J.; Drew, J.E.; Brinks, E. (1991)

    • Nova-like Cataclysmic Variables in the Infrared 

      Hoard, D. W.; Long, Knox S.; Howell, Steve B.; Wachter, Stefanie; Brinkworth, Carolyn S.; Knigge, Christian; Drew, J.E.; Szkody, Paula; Kafka, S.; Belle, Kunegunda; Ciardi, David R.; Froning, Cynthia S.; van Belle, Gerard T.; Pretorius, M. L. (2014-05)
      Novalike cataclysmic variables have persistently high mass transfer rates and prominent steady state accretion disks. We present an analysis of infrared observations of twelve novalikes obtained from the Two Micron All Sky ...

    • Observations of the IR recombination line emission from massive young stellar objects 

      Bunn, J.C.; Hoare, M.G.; Drew, J.E. (1995)
      We present new, high-resolution observations of the infrared H I emission lines of massive YSOs. The widths of the Br alpha, Brgamma and Pfgamma lines indicate outflowing material with velocities of 100-200 km s^-1 for all ...

    • The OmegaWhite Survey for Short-Period Variable Stars - I : Overview and First Results 

      Macfarlane, S. A.; Toma, R.; Ramsay, G.; Groot, Paul J.; Woudt, P. A.; Drew, J.E.; Barentsen, G.; Eisloffel, J. (2015-11-21)
      We present the goals, strategy and first results of the OmegaWhite survey: a wide-field high-cadence g-band synoptic survey which aims to unveil the Galactic population of short-period variable stars (with periods <80 min), ...

    • On the alignment between the circumstellar disks and orbital planes of Herbig Ae/Be binary systems 

      Wheelwright, H.E.; Oudmaijer, R.D.; Vink, J.S.; Drew, J.E. (2011)
      Context : The majority of the intermediate mass, pre-main-sequence Herbig Ae/Be stars reside in binary systems. As these systems are young, their properties may contain an imprint of the star formation process at intermediate ...

    • On the Evolved Nature of CK Vul 

      Hajduk, M.; Zijlstra, A.A.; van Hoof, P.A.M.; Lopez, J.A.; Drew, J.E.; Evans, A.; Eyres, S.P.S.; Gesicki, K.; Greimel, R.; Kerber, F.; Kimeswenger, S.; Richer, M.G. (Astronomical Society of the Pacific, 2008)
      CK Vul was classified as the oldest observed nova. Recent studies have proven however, that CK Vul cannot be unambiguously classified as any known kind of eruptive variable. We present the optical and radio observations ...

    • On the origin of the HI line emission associated with massive young stellar objects 

      Bunn, J.C.; Drew, J.E. (1992)
      The problem of interpreting the H I line emission associated with massive young stellar objects is addressed by comparing results of LTE calculations of H I Br-alpha and Pf-gamma profiles with observations of the exciting ...

    • On the origin of the X-ray emission towards the early Herbig Be star MWC 297 

      Vink, J.S.; O'Neill, P.M.; Els, S.G.; Drew, J.E. (2005)

    • The ongoing outburst of the new symbiotic star IPHASJ190832.31+051226.6 

      Corradi, R.L.M.; Munari, U.; Greimel, R.; Rubio-Diez, M.; Santander-Garcia, M.; Rodriguez-Gil, P.; Drew, J.E.; Leisy, P.; Liimets, T.; Sale, S.E. (2010)
      Aims. Eleven new symbiotic stars have recently been discovered with IPHAS, the INT Hα survey of the Northern Galactic plane. The star IPHAS J190832.31+051226.6 was proposed as an additional candidate on the basis of the ...

    • Optical Digital Galactic Plane Surveys and Star-Cluster Science 

      Drew, J.E.; Raddi, Roberto; EGAPS Consortia (Springer Nature, 2012)
      Over the next few years, the optical surveys IPHAS, UVEX and VPHAS+ will provide complete photometric coverage of the Galactic Plane within the latitude range -5 degrees <b <+5 degrees. Of these surveys, IPHAS is the most ...

    • 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 ...

    • The orbital period of V458 Vulpeculae, a post-double common-envelope nova 

      Rodriguez-Gil, P.; Santander-Garcia, M.; Knigge, C.; Corradi, R.L.M.; Gansicke, B.T.; Barlow, M.J.; Drake, J.; Drew, J.E.; Miszalski, B.; Napiwotzki, R.; Steeghs, D.; Wesson, R.; Zijlstra, A.A.; Jones, D.H.; Liimets, T.; Munoz-Darias, T.; Pyrzas, S.; Rubio-Diez, M. (2010)
      We present time-resolved optical spectroscopy of V458 Vulpeculae (Nova Vul 2007 No. 1) spread over a period of 15 months starting 301 d after its discovery. Our data reveal radial-velocity variations in the He II lambda ...

    • 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 ...

    • Phase-resolved Hubble Space Telescope ultraviolet spectroscopy of V795 Her 

      Rosen, S.R.; Prinja, R.K.; Drew, J.E.; Mason, K.O.; Howell, S.B. (1998)
      We present highly time-resolved HST FOS UV spectroscopy of the nova-like binary V795 Her. Several key results emerge. For the first time we find a strong 2.6-h signature in the variability of the UV lines. The HST data ...

    • Photoevaporating proplyd-like objects in Cygnus OB2 

      Wright, Nick; Drake, Jeremy; Drew, J.E.; Guarcello, Mario; Gutermuth, Robert; Hora, Joseph; Kraemer, Kathleen (2012-02)
      We report the discovery of 10 proplyd-like objects in the vicinity of the massive OB association Cygnus OB2. They were discovered in IPHAS Hα images and are clearly resolved in broadband Hubble Space Telescope/Advanced ...

    • 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)