Browsing University of Hertfordshire by Author "Saglia, R."

Now showing items 1-7 of 7

    • A 2 epoch proper motion catalogue from the UKIDSS Large Area Survey 

      Smith, Leigh; Lucas, P.W.; Burningham, B.; Jones, H.R.A.; Pinfield, D.J.; Smart, Ricky; Andrei, Alexandre (EDP Sciences, 2013)
      The UKIDSS Large Area Survey (LAS) began in 2005, with the start of the UKIDSS program as a 7 year effort to survey roughly 4000 square degrees at high galactic latitudes in Y, J, H and K bands. The survey also included a ...

    • Benchmark low-mass objects in Moving Groups 

      Galvez-Ortiz, M. C.; Kuznetsov, M.; Clarke, J. R. A.; Pavlenko, Ya. V.; Pinfield, D.J.; Jones, H.R.A.; Jenkins, J. S.; Barnes, J.; Burningham, B.; Day-Jones, A. C.; Martin, E. L.; Perez, A. E. Garcia; Pokorny, R.S. (EDP Sciences, 2013)
      In order to compile a sample of ultracool dwarfs that will serve as benchmarks for testing theoretical formation and evolutionary models, we selected low-mass cool (>M7) objects that are potentially members of five known ...

    • Measuring ultracool properties from the UKIDSS Large Area Survey 

      Day-Jones, Avril; Marocco, F.; Pinfield, D.J.; Zhang, Zenghua; Burningham, B.; Deacon, Niall; Ruiz, Maria-Teresa; Gallardo, Jose; Jones, H.R.A.; Lucas, P.W.; Jenkins, James; Gomes, Joana; Folkes, Stuart; Clarke, James (EDP Sciences, 2013)
      We discuss the properties and of ultracool and brown dwarfs that can be measured from current large area surveys and how fundamental parameters, such as the mass function and formation history can be measured, describing ...

    • Periodic variability of spotted M dwarfs in WTS 

      Goulding, N. T.; Barnes, J.R.; Pinfield, D.J.; del Burgo, C.; Kovacs, G.; Birkby, J.; Hodgkin, S.; Catalan, S.; Sipocz, B.; Jones, H.R.A.; Jeffers, S.V.; Nefs, S. (EDP Sciences, 2013)
      We present an analysis of the photometric variability of M dwarfs in the WFCAM Transit Survey, selected from spectral types inferred by their WTS and SDSS colours, with periods detected using a Lomb-Scargle Periodogram ...

    • Purple dwarfs : New L subdwarfs from UKIDSS and SDSS 

      Zhang, Z. H.; Pinfield, D.J.; Burningham, B.; Jones, H.R.A.; Day-Jones, A. C.; Marocco, F.; Gomes, J.; Galvez-Ortiz, M. C. (EDP Sciences, 2013)
      The first L subdwarf was a discovered only ten years ago. Less than ten L subdwarfs been published in the literature to date. Metal-poor ultracool atmospheres has not been well understood. Halo mass function cross substellar ...

    • Red Optical Planet Survey : A radial velocity search for low mass M dwarf planets 

      Barnes, J.R.; Jenkins, J. S.; Jones, H.R.A.; Rojo, P.; Arriagada, P.; Jordan, A.; Minniti, D.; Tuomi, M.; Jeffers, S.V.; Pinfield, D.J. (EDP Sciences, 2013)
      We present radial velocity results from our Red Optical Planet Survey (ROPS), aimed at detecting low-mass planets orbiting mid-late M dwarfs. The similar to 10 ms(-1) precision achieved over 2 consecutive nights with the ...

    • Status of the Calan-Hertfordshire Extrasolar Planet Search 

      Jenkins, James S.; Jones, H.R.A.; Rojo, Patricio; Tuomi, Mikko; Jones, Matias I.; Murgas, Felipe; Barnes, J.R.; Pavlenko, Yakiv; Ivanyuk, Oleksiy; Jordan, Andres; Day-Jones, Avril C.; Ruiz, Maria-Teresa; Pinfield, D.J. (EDP Sciences, 2013)
      In these proceedings we give a status update of the Calan-Hertfordshire Extrasolar Planet Search, an international collaboration led from Chile that aims to discover more planets around super metal-rich and Sun-like stars, ...