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Now showing items 12073-12092 of 24095

    • Ionizing feedback from massive stars in massive clusters - II. Disruption of bound clusters by photoionization 

      Ercolano, B.; Bonnell, I.~A.; Dale, James (2012-07-21)
      We present a smoothed particle hydrodynamics parameter study of the dynamical effect of photoionization from O-type stars on star-forming clouds of a range of masses and sizes during the time window before supernovae ...

    • The ionizing properties of two bright Ly$α$ emitters in the BDF reionized bubble at z=7 

      Castellano, M.; Pentericci, L.; Cupani, G.; Curtis-Lake, E.; Vanzella, E.; Amorín, R.; Belfiori, D.; Calabrò, A.; Carniani, S.; Charlot, S.; Chevallard, J.; Dayal, P.; Dickinson, M.; Ferrara, A.; Fontana, A.; Giallongo, E.; Hutter, A.; Merlin, E.; Paris, D.; Santini, P. (2022-06-28)
      We investigate the ionizing properties of the pair of bright Ly$\alpha$ emitting galaxies BDF521 and BDF2195 at z=7.012 in order to constrain their contribution to the formation of the BDF "reionized bubble". We obtain ...

    • Ionophores : potential toxicities 

      McKellar, Quintin; Lawrence, K. (1996)
      The ionophores are a group of antibiotics produced by the fermentation of fungal [i]Streptomyces[/i] species which have activity against some Gram-positive bacteria, coccidia, [i]Neospora[/i] and [i]Toxoplasma[/i]. The ...

    • Ionospheric modelling using GPS to calibrate the MWA. 1 : Comparison of first order ionospheric effects between GPS models and MWA observations 

      Arora, B. S.; Morgan, J.; Ord, S. M.; Tingay, S. J.; Hurley-Walker, N.; Bell, M.; Bernardi, G.; Bhat, R.; Briggs, F.; Callingham, J. R.; Deshpande, A. A.; Dwarakanath, K. S.; Ewall-Wice, A.; Feng, L.; For, B. -Q.; Hancock, P.; Hazelton, B. J.; Hindson, L.; Jacobs, D.; Johnston-Hollitt, M.; Kapińska, A. D.; Kudryavtseva, N.; Lenc, E.; McKinley, B.; Mitchell, D.; Oberoi, D.; Offringa, A. R.; Pindor, B.; Procopio, P.; Riding, J.; Staveley-Smith, L.; Wayth, R. B.; Wu, C.; Zheng, Q.; Bowman, J. D.; Cappallo, R. J.; Corey, B. E.; Emrich, D.; Goeke, R.; Greenhill, L. J.; Kaplan, D. L.; Kasper, J. C.; Kratzenberg, E.; Lonsdale, C. J.; Lynch, M. J.; McWhirter, S. R.; Morales, M. F.; Morgan, E.; Prabu, T.; Rogers, A. E. E.; Roshi, A.; Shankar, N. Udaya; Srivani, K. S.; Subrahmanyan, R.; Waterson, M.; Webster, R. L.; Whitney, A. R.; Williams, A.; Williams, C. L. (2015-08-10)
      We compare first order (refractive) ionospheric effects seen by the Murchison Widefield Array (MWA) with the ionosphere as inferred from Global Positioning System (GPS) data. The first order ionosphere manifests itself as ...

    • Ionospheric Modelling using GPS to Calibrate the MWA. II : Regional ionospheric modelling using GPS and GLONASS to estimate ionospheric gradients 

      Arora, B. S.; Morgan, J.; Ord, S. M.; Tingay, S. J.; Bell, M.; Callingham, J. R.; Dwarakanath, K. S.; For, B. -Q.; Hancock, P.; Hindson, L.; Hurley-Walker, N.; Johnston-Hollitt, M.; Kapinska, A. D.; Lenc, E.; McKinley, B.; Offringa, A. R.; Procopio, P.; Staveley-Smith, L.; Wayth, R. B.; Wu, C.; Zheng, Q. (2016-07-13)
      We estimate spatial gradients in the ionosphere using the Global Positioning System (GPS) and GLONASS (Russian global navigation system) observations, utilising data from multiple GPS stations in the vicinity of Murchison ...

    • AN IOT BASED WEATHER STATION USING AN EMBEDDED SYSTEM 

      Olanrele, Oladeji; Adeaga, Oyetunde A; Adeyemi, Oluseyi A; Ajayi, Oluwaseun K; Mowemi, Alex .O. (2022-12-22)
      This paper is about the development of an internet-based weather station system to monitor temperature, humidity, light intensity and predict the possibility of whether it will rain or not. The realtime monitoring system ...

    • IP from the Standpoint of SQP 

      Bartholomew-Biggs, M. (2001)

    • IP, an interesting phenomenon : The relevance of patents for the design-led start-up business 

      Hillner, Matthias (2013-12-01)
      In their book, ‘The Smart Entrepreneur’, Clarysse and Kiefer claim that ‘Patents are particularly important when your business is not close to market, because the exclusivity afforded by a solid patent can buy you some ...

    • 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 ...

    • IR Imaging Polarimetry of the Nuclear Regions of CEN A 

      Bailey, J.; Hough, J.; Chrysostomou, A. (Astronomical Society of the Pacific, 1994)
      Aperture polarimetry of the nucleus of Cen A (Bailey et al. 1986) revealed a very red polarized source present in the K and L bands which was interpreted as a blazar type nucleus. To study this region in more detail we ...

    • IR imaging surveys of AGB stars in the Magellanic Clouds 

      Cioni, M-R.L. (2010)
      AGB stars are ideal IR targets because they are cool and bright. Most of them escaped detection in optical or shallow IR surveys in the eighties contributing to the puzzling missing number of AGB stars with respect to ...

    • IR imaging surveys of AGB stars in the Magellanic Clouds 

      Cioni, M-R.L. (European Astronomical Society, 2010)
      AGB stars are ideal IR targets because they are cool and bright. Most of them escaped detection in optical or shallow IR surveys in the eighties contributing to the puzzling missing number of AGB stars with respect to ...

    • IR photometry and polarimetry of 2A0311−227 

      Bailey, J.; Hough, J.; Axon, D.J. (1980)
      The X-ray source 2A0311 − 227 has recently been identified with a star whose spectrum and polarization properties show it to be an AM Herculis type binary. These binaries are thought to consist of a synchronously rotating ...