The Physical Properties of Four ~600 K T Dwarfs (2009)
Leggett, S. K., Cushing, Michael C., Saumon, D., Marley, M. S., Roellig, T. L., Warren, S. J., ...
We present Spitzer 7.6-14.5 μm spectra of ULAS J003402.77–005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and...
The discovery of an M4+T8.5 binary system (2009)
Burningham, Ben, Pinfield, D. J., Leggett, S. K., Tinney, C. G., Liu, M. C., Homeier, D., ...
We report the discovery of a T8.5 dwarf, which is a companion to the M4 dwarf Wolf 940. At a distance of 12.50 (+0.75,-0.67) pc, the angular separation of 32arcsec corresponds to a projected...
The Physical Properties of Four ~600K T Dwarfs (2009)
Leggett, S. K., Cushing, M. C., Saumon, D., Marley, M. S., Roellig, T. L., Warren, S. J., ...
We present Spitzer 7.6-14.5um spectra of ULAS J003402.77-005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and photometry...
Fukue, T., Tamura, M., Kandori, R., Kusakabe, N., Hough, J. H., Lucas, P. W., ...
We present a deep circular polarization image of the Orion BN/KL nebula in the Ks band and correlations of circular polarization, linear polarization, and H-Ks color representing extinction. The...
Fukue, T., Tamura, M., Kandori, R., Kusakabe, N., Hough, J., Lucas, P.W., ...
Original article can be found at: http://www.iop.org/EJ/journal/apjl Copyright American Astronomical Society. DOI: 10.1088/0004-637x/692/2/L88 [Full text of this article is not available in the UHRA]
Davis, C.J., Froebrich, D., Stanke, T., Megeath, S.T., Kumar, M.S.N., Adamson, A.J., ...
Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory (ESO). DOI: 10.1051/0004-6361:200811096
The physical properties of four ~600 K T dwarfs. (2009)
Leggett, S., Cushing, M.C., Saumon, D., Marley, M., Roellig, T.L., Warren, S.J., ...
Original article can be found at: http://www.iop.org/EJ/journal/apj Copyright American Astronomical Society DOI: 10.1088/0004-637X/695/2/1517 [Full text of this article is not available in the UHRA]
Planetpol polarimetry of the exoplanet systems 55 Cnc and tau Boo. (2009)
Lucas, P.W., Hough, J., Bailey, J., Tamura, M., Hirst, E., Harrison, D.
‘The definitive version is available at www.blackwell-synergy.com.’ Copyright Blackwell Publishing / Royal Astronomical Society
Weights, D., Lucas, P.W., Roche, P.F., Pinfield, D.J., Riddick, F.
‘The definitive version is available at www3.interscience.wiley.com '. Copyright Blackwell Publishing / Royal Astronomical Society. DOI: 10.1111/j.1365-2966.2008.14096.x
Weights, D. J., Lucas, P. W., Roche, P. F., Pinfield, D. J., Riddick, F.
We present near-infrared long slit and multi-slit spectra of low mass brown dwarf candidates in the Orion Nebula Cluster. The long slit data were observed in the H- & K-bands using NIRI on the Gemini...
Planetpol polarimetry of the exoplanet systems 55 Cnc and tau Boo (2008)
Lucas, P. W., Hough, J. H., Bailey, J. A., Tamura, M., Hirst, E., Harrison, D.
We present very sensitive polarimetry of 55 Cnc and tau Boo in an attempt to detect the partially polarised reflected light from the planets orbiting these two stars. 55 Cnc is orbited by a hot...
Exploring the substellar temperature regime down to ~550K (2008)
Burningham, Ben, Pinfield, D. J., Leggett, S. K., Tamura, M., Lucas, P. W., Homeier, D., ...
We report the discovery of three very late T dwarfs in the UKIRT Infrared Deep Sky Survey (UKIDSS) Third Data Release: ULAS J101721.40+011817.9 (ULAS1017), ULAS J123828.51+095351.3 (ULAS1238) and...
Fifteen new T dwarfs discovered in the UKIDSS Large Area Survey (2008)
Pinfield, D. J., Burningham, B., Tamura, M., Leggett, S. K., Lodieu, N., Lucas, P. W., ...
We present the discovery of fifteen new T2.5-T7.5 dwarfs (with estimated distances between ~24-93pc, identified in the first three main data releases of the UKIRT Infrared Deep Sky Survey. This...
Near-Infrared Imaging Polarimetry of Young Stellar Objects in rho-Ophiuchi (2008)
Beckford, A. F., Lucas, P. W., Chrysostomou, A. C., Gledhill, T. M.
The results of a near-infrared (J H K LP) imaging linear polarimetry survey of 20 young stellar objects (YSOs) in rho Ophiuchi are presented. The majority of the sources are unresolved, with K-band...
Near-infrared imaging polarimetry of young stellar objects in ρ Ophiuchi. (2008)
Beckford, A., Lucas, P.W., Chrysostomou, A., Gledhill, T.
‘The definitive version is available at www.blackwell-synergy.com.’ Copyright Blackwell Publishing
Gonzalez-Solares, E., Walton, N.A., Greimel, R., Drew, J.E., Irwin, M.J., Sale, S.E., ...
‘The definitive version is available at www.blackwell-synergy.com.’ Copyright Blackwell Publishing DOI: 10.1111/j.1365-2966.2008.13399.x
Near-Infrared Imaging Polarimetry of M42: Aperture Polarimetry of Point-like Sources. (2008)
Kusakabe, N., Tamura, M., Kandori, R., Hashimoto, J., Nakajima, Y., Nagata, T., ...
Original article can be found at: http://www.iop.org/EJ/journal/aj Copyright American Astronomical Society DOI: 10.1088/0004-6256/136/2/621 [Full text of this article is not available in the UHRA]
Exploring the substellar temperature regime down to ~550 K. (2008)
Burningham, B., Pinfield, D.J., Lucas, P.W., Jones, H.R.A.
The original article can be found at: http://www3.interscience.wiley.com Copyright Blackwell Publishing. DOI: 10.1111/j.1365-2966.2008.13885.x
The UKIDSS Galactic Plane Survey. (2008)
Lucas, P.W., Hoare, M.G., Longmore, A.J., Schroeder, A.C., Davis, C.J., Drew, J.E., ...
'The definitive version is available at www.blackwell-synergy.com .' Copyright Blackwell Publishing DOI: 10.1111/j.1365-2966.2008.13924.x
Gonzalez-Solares, E. A., Walton, N. A., Greimel, R., Drew, J. E., Irwin, M. J., Sale, S. E., ...
The INT/WFC Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS) is an imaging survey being carried out in H-alpha, r' and i' filters, with the Wide Field Camera (WFC) on the 2.5-metre...
The UKIDSS Galactic Plane Survey (2007)
Lucas, P. W., Hoare, M. G., Longmore, A., Schroder, A. C., Davis, C. J., Adamson, A., ...
The UKIDSS Galactic Plane Survey (GPS) is one of the five near infrared Public Legacy Surveys that are being undertaken by the UKIDSS consortium, using the Wide Field Camera on the United Kingdom...
A very cool brown dwarf in UKIDSS DR1 (2007)
Warren, S. J., Mortlock, D. J., Leggett, S. K., Pinfield, D. J., Homeier, D., Dye, S., ...
(abridged) We report the discovery of a very cool brown dwarf, ULAS J003402.77-005206.7 (ULAS J0034-00), identified in UKIDSS DR1. We provide optical, near-infrared, and mid-infrared photometry of...
The UKIRT infrared deep sky survey first data release. (2007)
Warren, S.J., Hambly, N.C., Dye, S., Almaini, O., Cross, N.J.G., Edge, A.C., ...
Two T dwarfs from the UKIDDS early data release. (2007)
Kendall, T.R., Tamura, M., Tinney, C.G., Martin, E., Ishii, M., Pinfield, D.J., ...
Alignment of atmospheric mineral dust due to electric field. (2007)
Ulanowski, Z., Bailey, J., Lucas, P.W., Hough, J., Hirst, E.
Alignment of atmospheric mineral dust due to electric field. (2007)
Ulanowski, Z., Bailey, J., Lucas, P.W., Hough, J., Hirst, E.
Alignment of atmospheric mineral dust due to electric field. (2007)
Ulanowski, Z., Bailey, J., Lucas, P.W., Hough, J., Hirst, E.
A very cool brown dwarf in UKIDSS DR1. (2007)
Warren, S.J., Mortlock, D.J., Leggett, S., Pinfield, D.J., Homeier, D., Dye, S., ...
Alignment of atmospheric mineral dust due to electric field (2007)
Ulanowski, Z., Bailey, J., Lucas, P. W., Hough, J. H., Hirst, E.
Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction consistent with the presence of vertically aligned particles in the atmosphere....
Alignment of atmospheric mineral dust due to electric field (2007)
Ulanowski, Z., Bailey, J., Lucas, P. W., Hough, J. H., Hirst, E.
Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction indicating the presence of vertically aligned particles in the atmosphere....
Alignment of atmospheric mineral dust due to electric field (2007)
Ulanowski, Z., Bailey, J., Lucas, P. W., Hough, J. H., Hirst, E.
Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction consistent with the presence of vertically aligned particles in the atmosphere....
Alignment of atmospheric mineral dust due to electric field (2007)
Ulanowski, Z., Bailey, J., Lucas, P. W., Hough, J. H., Hirst, E.
Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction indicating the presence of vertically aligned particles in the atmosphere....
Alignment of atmospheric mineral dust due to electric field (2007)
Z. Ulanowski, J. Bailey, P. W. Lucas, J. H. Hough, E. Hirst
Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction indicating the presence of vertically aligned particles in the atmosphere....
Alignment of atmospheric mineral dust due to electric field (2007)
Z. Ulanowski, J. Bailey, P. W. Lucas, J. H. Hough, E. Hirst
Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction consistent with the presence of vertically aligned particles in the atmosphere....
The UKIRT infrared deep sky survey early data release (2006)
Dye, S., Warren, S.J., Hambly, N.C., Cross, N.J.G., Hodgkin, S.T., Irwin, M.J., ...
This paper defines the UKIRT Infrared Deep Sky Survey (UKIDSS) Early Data Release (EDR). UKIDSS is a set of five large near-infrared surveys being undertaken with the United Kingdom Infrared...
The UKIRT Infrared Deep Sky Survey First Data Release (2006)
Warren, S. J., Hambly, N. C., Dye, S., Almaini, O., Cross, N. J. G., Edge, A. C., ...
The First Data Release (DR1) of the UKIRT Infrared Deep Sky Survey (UKIDSS) took place on 2006 July 21. UKIDSS is a set of five large near-infrared surveys, covering a complementary range of areas,...
Spectroscopy of planetary mass brown dwarfs in Orion (2006)
Lucas, P. W., Weights, D. J., Roche, P. F., Riddick, F. C.
We report the results of near infrared spectroscopy of 11 luminosity selected candidate planetary mass objects (PMOs) in the Trapezium Cluster with Gemini South/GNIRS and Gemini North/NIRI. 6 have...
Finding benchmark brown dwarfs to probe the IMF as a function of time (2006)
Pinfield, D. J., Jones, H. R. A., Lucas, P. W., Kendall, T. R., Folkes, S. L., Day-Jones, A. C., ...
Using a simulated disk brown dwarf (BD) population, we find that new large area infrared surveys are expected to identify enough BDs covering wide enough mass--age ranges to potentially measure the...
PlanetPol : a very high sensitivity polarimeter (2006)
Hough, J. H, Lucas, P. W, Bailey, J. A, Tamura, M, Hirst, E, Harrison, D, ...
We have built and used on several occasions an optical broadband stellar polarimeter, PlanetPol, which employs photoelastic modulators and avalanche photodiodes and achieves a photon-noise-limited...
PlanetPol : a very high sensitivity polarimeter (2006)
Hough, J. H, Lucas, P. W, Bailey, J. A, Tamura, M, Hirst, E, Harrison, D, ...
We have built and used on several occasions an optical broadband stellar polarimeter, PlanetPol, which employs photoelastic modulators and avalanche photodiodes and achieves a photon-noise-limited...
Near infrared polarization images of the Orion Nebula. (2006)
Tamura, M., Kandori, R., Kusakabe, N., Nakajima, Y., Hashimoto, J., Nagashima, C., ...
Original article can be found at: http://www.iop.org/EJ/journal/apjl Copyright American Astronomical Society DOI: 10.1086/508168 [Full text of this article is not available in the UHRA]
HL Tau: 3-D Polarisation Modelling and Magnetic Field Structure. (2005)
Lucas, P.W., Fukagawa, M., Tamura, M., Chrysostomou, A., Beckford, A.
PLANETPOL : polarimetry of hot Jupiters at the parts per million level (2005)
Lucas, P. W, Hough, J. H, Bailey, J. A
We summarize the peliminary results from 3 observing runs with PLANETPOL, a polarimeter designed to achieve sensitivities of order 10⁻⁶ in fractional polarization for nearby hot Jupiter systesm....
A circumstellar disk associated with a massive protostellar object. (2005)
Jiang, Z., Tamura, M., Fukagawa, M., Hough, J., Lucas, P.W., Suto, H., ...
Original article can be found at: http://www.nature.com/nature/index.html Copyright Nature Publishing Group. DOI: 10.1038/nature04012 [Full text of this article is not available in the UHRA]
The Polarization signature of extra-solar planets (2005)
Hough, J, Lucas, P. W, Bailey, J
Despite recent advances in the study of extra-solar planets the detection of reflected light from planetary atmospheres remains a major goal. For the so-called hot-Jupiters, which are unlikely to be...
Hough, J., Lucas, P.W., Bailey, J., Tamura, M.
Copyright 2003 Society of Photo-Optical Instrumentation Engineers. DOI: 10.1117/12.458222 [Full text of this article is not available in the UHRA]
Circular polarisation in star-forming regions: possible implications for homochirality. (2001)
Hough, J., Bailey, J., Chrysostomou, A., Gledhill, T., Lucas, P.W., Tamura, M., ...
Original article can be found at: http://www.sciencedirect.com/science/journal/02731177 Copyright Committee on Space Research. DOI: 10.1016/S0273-1177(01)00063-1 [Full text of this article is not...
A Population of very young Brown Dwarfs and free-floating Planets in Orion (2000)
We describe the results of a very deep imaging survey of the Trapezium Cluster in the IJH bands, using the UKIRT high resolution camera UFTI. Approximately 32% of the 515 point sources detected are...
Tree Leaf Form in Brunei: A Heath Forest and a Mixed Dipterocarp Forest Compared1 (2000)
I. M. Turner, P. W. Lucas, P. Becker, S. C. Wong, M. F. Choong, ...
Canopy-top leaves of the dominant tree species from two 0.96-ha plots in Brunei, northern Borneo, were sampled for structural and chemical analysis. Thirteen species from the mixed dipterocarp forest...
Terry, G. M., Stokes, N. J., Lucas, P. W., Hewitt, C. N.
One-year-old cherry trees were fumigated with propene and gas-phase hydrogen peroxide, singly and in combination, in controlled-environment chambers for an 8-week period during the summer season. A...
Rantanen, L., Palomäki, V., Harrison, A. F., Lucas, P. W., Mansfield, T. A.
Two-year-old seedlings of Norway spruce were exposed for 110 or 158 d in outdoor chambers to a combination of 30 nl 1−1 sulphur dioxide and 30 nl 1−1 nitrogen dioxide, and limited availability of...
Stokes, N. J., Lucas, P. W., Hewitt, C. N.
The design and construction of eight 1-m3 fumigation chambers for exposing plants to reactive air pollutants at low concentrations are reported. Teflon surfaces are used where possible to minimize...
Lucas, P. W., Rantanen, L., Mehlhorn, H.
Two-year-old seedlings of Sitka spruce were exposed to 70 nl 1−1 ozone or to filtered air over three successive summers in outdoor large-scale fumigation chambers (Solardomes). Seven months after...
How Tough are Sclerophylls? (1993)
Turner, I. M., Choong, M. F., Tan, H. T.W., Lucas, P. W.
Fracture toughness was estimated for a 'least tough' path in the leaves of woody species from three sclerophyllous plant communities. Most of the species from Mediterranean, tropical heath forest and...