Browsing University of Hertfordshire by Title

Now showing items 1472-1491 of 24087

    • The ATLAS3D project - XXVII : Cold gas and the colours and ages of early-type galaxies 

      Young, L.M.; Scott, Nicholas; Serra, Paolo; Alatalo, Katherine; Blitz, Leo; Bois, Maxime; Bournaud, Frederic; Bureau, Martin; Crocker, Alison F.; Cappellari, Michele; Davies, R.L.; Davis, T.A.; de Zeeuw, P.T.; Duc, Pierre-Alain; Emsellem, Eric; Khochfar, Sadegh; Krajnovic, Davor; Kuntschner, Harald; McDermid, Richard M.; Morganti, Raffaella; Naab, Thorsten; Oosterloo, Tom; Sarzi, Marc; Weijmans, Anne-Marie (2014-11-11)
      We present a study of the cold gas contents of the ATLAS3D early-type galaxies, in the context of their optical colours, near-ultraviolet colours and Hβ absorption line strengths. Early-type (elliptical and lenticular) ...

    • The ATLAS3D Project - XXVIII : Dynamically driven star formation suppression in early-type galaxies 

      Davis, T.A.; Young, L.M.; Crocker, Alison F.; Bureau, Martin; Blitz, Leo; Alatalo, Katherine; Emsellem, Eric; Naab, Thorsten; Bayet, Estelle; Bois, Maxime; Bournaud, Frederic; Cappellari, Michele; Davies, R.L.; de Zeeuw, P.T.; Duc, Pierre-Alain; Khochfar, Sadegh; Krajnović, Davor; Kuntschner, Harald; McDermid, Richard M.; Morganti, Raffaella; Oosterloo, Tom; Sarzi, Marc; Scott, Nicholas; Serra, Paolo; Weijmans, Anne-Marie (2014-11-11)
      We present measurements of the star formation rate (SFR) in the early-type galaxies (ETGs) of the ATLAS3D sample, based on Wide-field Infrared Survey Explorer (WISE) 22 μm and Galaxy Evolution Explorer far-ultraviolet ...

    • The ATLAS3D project - XXX : Star formation histories and stellar population scaling relations of early-type galaxies 

      McDermid, Richard M.; Alatalo, Katherine; Blitz, Leo; Bournaud, Frédéric; Bureau, Martin; Cappellari, Michele; Crocker, Alison F.; Davies, Roger L.; Davis, Timothy A.; de Zeeuw, P.T.; Duc, Pierre-Alain; Emsellem, Eric; Khochfar, Sadegh; Krajnović, Davor; Kuntschner, Harald; Morganti, Raffaella; Naab, Thorsten; Oosterloo, Tom; Sarzi, Marc; Scott, Nicholas; Serra, Paolo; Weijmans, Anne-Marie; Young, Lisa M. (2015-04-21)

    • ATLASGAL - environments of 6.7 GHz methanol masers 

      Urquhart, J.S.; Moore, T.J.T.; Schuller, F.; Wyrowski, F.; Menten, K. M.; Thompson, M. A.; Csengeri, T.; Walmsley, C.M.; Bronfman, L.; König, C. (2013-05-01)
      Using the 870 micron APEX Telescope large area survey of the Galaxy, we have identified 577 submillimetre continuum sources with masers from the methanol multibeam survey in the region 280deg lt ell lt 20deg; |b| lt 1deg.5 ...

    • ATLASGAL - properties of a complete sample of Galactic clumps 

      Urquhart, J.S.; Koenig, C.; Giannetti, A.; Leurini, S.; Moore, T. J. T.; Eden, D.~J.; Pillai, T.; Thompson, M. A.; Braiding, C.; Burton, M. G.; Csengeri, T.; Dempsey, J. T.; Figura, C.C.; Froebrich, D.; Menten, K.~M.; Schuller, F.; Smith, M. D.; Wyrowski, F. (2018-01-01)
      The APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) is an unbiased 870 μm submillimetre survey of the inner Galactic plane (|ℓ| < 60° with |b| < 1.°5). It is the largest and most sensitive ground-based submillimetre ...

    • ATLASGAL - towards a complete sample of massive star forming clumps 

      Urquhart, J.S.; Moore, T. J. T.; Csengeri, T.; Wyrowski, F.; Schuller, F.; Hoare, M.G.; Lumsden, S. L.; Mottram, J. C.; Thompson, M.A.; Menten, K. M.; Walmsley, C.M.; Bronfman, L.; Pfalzner, S.; König, C.; Wienen, M. (2014-09-11)
      By matching infrared-selected, massive young stellar objects (MYSOs) and compact HII regions in the Red MSX Source survey to massive clumps found in the submillimetre ATLASGAL (APEX Telescope Large Area Survey of the Galaxy) ...

    • ATLASGAL -- physical parameters of dust clumps associated with 6.7 GHz methanol masers 

      Billington, S. J.; Urquhart, J. S.; Konig, C.; Moore, T. J. T.; Eden, D. J.; Breen, S. L.; Kim, W. -J.; Thompson, M. A.; Ellingsen, S. P.; Menten, K. M.; Wyrowski, F.; Leurini, S. (2019-12-01)
      We have constructed the largest sample of dust-associated class II 6.7 GHz methanol masers yet obtained. New measurements from the the Methanol MultiBeam (MMB) Survey were combined with the 870 $\mu$m APEX Telescope Large ...

    • ATLASGAL -- Relationship between dense star forming clumps and interstellar masers 

      Billington, S. J.; Urquhart, J. S.; König, C.; Beuther, H.; Breen, S. L.; Menten, K. M.; Campbell-White, J.; Ellingsen, S. P.; Thompson, M. A.; Moore, T. J. T.; Eden, D. J.; Kim, W. -J.; Leurini, S. (2020-09-29)
      We have used catalogues from several Galactic plane surveys and dedicated observations to investigate the relationship between various maser species and Galactic star forming clumps, as identified by the ATLASGAL survey. ...

    • ATLASGAL --- Molecular fingerprints of a sample of massive star forming clumps 

      Urquhart, J. S.; Figura, C.; Wyrowski, F.; Giannetti, A.; Kim, W. -J.; Wienen, M.; Leurini, S.; Pillai, T.; Csengeri, T.; Gibson, S. J.; Menten, K.; Moore, T. J. T.; Thompson, M. A. (2019-04-21)
      We have conducted a 3-mm molecular-line survey towards 570 high-mass star-forming clumps, using the Mopra telescope. The sample is selected from the 10 000 clumps identified by the ATLASGAL (APEX Telescope Large Area Survey ...

    • ATM automation: guidance on human technology integration 

      Amaldi, Paola; Quercioli, Monica (CAA UK, 2016-03-01)
      Human interaction with technology and automation is a key area of interest to industry and safety regulators alike. In February 2014, a joint CAA/industry workshop considered perspectives on present and future implementation ...

    • Atmospheric aerosol characterization combining multi-wavelength Raman Lidar and MAX-DOAS measurements in Gwanjgu 

      Chong, Jihyo; Shin, Dong Ho; Kim, Kwan Chul; Lee, Kwon-Ho; Shin, Sungkyun; Noh, Y. M.; Mueller, D.; Kim, Young J. (SPIE, 2011)
      Integrated approach has been adopted at the ADvanced Environmental Research Center (ADEMRC), Gwangju Institute of Science and Technology (GIST), Korea for effective monitoring of atmospheric aerosol. Various active and ...

    • Atmospheric dust charging, vertical profiles, and optical properties measured in the Arabian Peninsula during the DREAME campaign 

      Ulanowski, Joseph; Sabbah, Ismail; Harrison, R.G.; Nicoll, K.A.; Hirst, Edwin; Kaye, Paul H.; Al-Abbadi, Naif; Rogers, George (2010)
      Polarimetric observations of atmospheric Saharan dust over the Canary Islands have provided strong evidence for the presence of vertically aligned particles. The alignment was thought to be due to the electric field present ...

    • Atmospheric dust modeling from meso to global scales with the online NMMB/BSC-Dust model - Part 2 : Experimental campaigns in Northern Africa 

      Haustein, K.; Perez, C.; Baldasano, J. M.; Jorba, O.; Basart, S.; Miller, R. L.; Janjic, Z.; Black, T.; Nickovic, S.; Todd, M. C.; Washington, R.; Mueller, D.; Tesche, Matthias; Weinzierl, B.; Esselborn, M.; Schladitz, A. (2012)
      The new NMMB/BSC-Dust model is intended to provide short to medium-range weather and dust forecasts from regional to global scales. It is an online model in which the dust aerosol dynamics and physics are solved at each ...

    • Atmospheric metal-deposition in London 

      Duggan, M. J.; Burton, Marie (1983)

    • Atmospheric polycyclic aromatic hydrocarbons: Source attribution, emission factors and regulation 

      Ravindra, K.; Sokhi, R.S.; Van Grieken, R. (2008)
      There is an increasing concern about the occurrence of polycyclic aromatic hydrocarbons (PAHs) in the environment as they are ubiquitous in ambient air and some of them are among the strongest known carcinogens. PAHs and ...

    • Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-infrared 

      Adams, Arthur D.; Meyer, Michael R.; Howe, Alex R.; Burningham, Ben; Daemgen, Sebastian; Fortney, Jonathan; Line, Mike; Marley, Mark; Quanz, Sascha P.; Todorov, Kamen (2023-10-13)
      We present model constraints on the atmospheric structure of HD 106906 b, a planetary-mass companion orbiting at a ∼700 au projected separation around a 15 Myr old stellar binary, using the APOLLO retrieval code on spectral ...

    • An Atmospheric Retrieval of the Brown Dwarf Gliese 229B 

      Calamari, Emily; Faherty, Jacqueline K.; Burningham, Ben; Gonzales, Eileen; Bardalez-Gagliuffi, Daniella; Vos, Johanna M.; Gemma, Marina; Whiteford, Niall; Gaarn, Josefine (2022-12-01)
      We present results from an atmospheric retrieval analysis of Gl 229B using the Brewster retrieval code. We find the best fit model to be cloud-free, consistent with the T dwarf retrieval work of Line et al.; Zalesky et al. ...

    • ATMP-CA: Optimising Mixed-Criticality Systems Considering Criticality Arithmetic 

      Fadlelseed, Sajid; Kirner, Raimund; Menon, Catherine (2021-06-06)
      Many safety-critical systems use criticality arithmetic, an informal practice of implementing a higher-criticality function by combining several lower-criticality redundant components or tasks. This lowers the cost of ...

    • ATMP: An Adaptive Tolerance-based Mixed-criticality Protocol for Multi-core Systems 

      Kirner, Raimund; Menon, Catherine; Iacovelli, Saverio (Institute of Electrical and Electronics Engineers (IEEE), 2018-06-08)
      The challenge of mixed-criticality scheduling is to keep tasks of higher criticality running in case of resource shortages caused by faults. Traditionally, mixedcriticality scheduling has focused on methods to handle faults ...

    • Atomic hydrogen in the spiral galaxy NGC 3631 

      Knapen, J. (1997)
      New high resolution, high sensitivity WSRT Hi synthesis observations of the spiral galaxy NGC 3631 are presented. In the total atomic hydrogen map, the spiral arms are well distinguished from the interarm regions, while ...