Now showing items 391-410 of 918

  • A Jacobian-free Newton-Krylov method for time-implicit multidimensional hydrodynamics 

    Viallet, M; Goffrey, T; Baraffe, I; Folini, D; Geroux, C; Popov, M; Pratt, J; Walder, R (arXiv.org, 2015-12-14)
    This work is a continuation of our efforts to develop an efficient implicit solver for multidimensional hydrodynamics for the purpose of studying important physical processes in stellar interiors, such as turbulent convection ...
  • The James Clerk Maxwell telescope dense gas survey of the Perseus molecular cloud 

    Walker-Smith, SL; Richer, JS; Buckle, JV; Hatchell, J; Drabek-Maunder, E (Oxford University Press (OUP) on behalf of the Royal Astronomical Society, 2013-01-01)
    We present the results of a large-scale survey of the very dense (n > 106 cm-3) gas in the Perseus molecular cloud using HCO+ and HCN (J = 4 → 3) transitions. We have used this emission to trace the structure and kinematics ...
  • The James Clerk Maxwell telescope Legacy Survey of the Gould Belt: A molecular line study of the Ophiuchus molecular cloud 

    White, GJ; Drabek-Maunder, E; Rosolowsky, E; Ward-Thompson, D; Davis, J; Gregson, J; Hatchell, J; Etxaluze, M; Stickler, S; Buckle, J; Johnstone, D; Friesen, R; Sadavoy, S; Natt, KV; Currie, M; Richer, JS; Pattle, K; Spaans, M; Di Francesco, J; Hogerheijde, MR (Oxford University Press (OUP) on behalf of the Royal Astronomical Society, 2014-01-01)
    CO, 13CO, and C18O J = 3-2 observations are presented of the Ophiuchus molecular cloud. The 13CO and C18O emission is dominated by the Oph A clump, and the Oph B1, B2, C, E, F, and J regions. The optically thin(ner) C18O ...
  • The JCMT Gould Belt Survey: a first look at dense cores in Orion B 

    Kirk, H; Di Francesco, J; Johnstone, D; Duarte-Cabral, A; Sadavoy, S; Hatchell, J; Mottram, JC; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Jenness, T; Nutter, D; Pattle, K; Pineda, JE; Quinn, C; Salji, C; Tisi, S; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chen, M; Chrysostomou, A; Coude, S; Davis, CJ; Drabek-Maunder, E; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Mowat, C; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Rumble, D; Thomas, H; Tothill, N; Viti, S; White, GJ; Wouterloot, J; Yates, J; Zhu, M (IOP Publishing, 2016-02-01)
    We present a first look at the SCUBA-2 observations of three sub-regions of the Orion B molecular cloud: LDN 1622, NGC 2023/2024, and NGC 2068/2071, from the JCMT Gould Belt Legacy Survey. We identify 29, 564, and 322 dense ...
  • The JCMT Gould Belt Survey: a quantitative comparison between SCUBA-2 data reduction methods 

    Mairs, S; Johnstone, D; Kirk, H; Graves, S; Buckle, J; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Hatchell, Jennifer; Jenness, T; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Salji, C; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; JCMT Gould Belt survey Team (Oxford University Press for Royal Astronomical Society, 2015-12-01)
    Performing ground-based submillimetre observations is a difficult task as the measurements are subject to absorption and emission from water vapour in the Earth's atmosphere and time variation in weather and instrument ...
  • The JCMT Gould Belt Survey: constraints on prestellar core properties in Orion A North 

    Salji, CJ; Richer, JS; Buckle, JV; Hatchell, Jennifer; Kirk, H; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Jenness, T; Johnstone, D; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Quinn, Ciara; Tisi, S; Walker-Smith, S; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Butner, H; Chen, M; Chrysostomou, A; Coude, S; Davis, CJ; Drabek-Maunder, E; Duarte-Cabral, A.; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Rawlings, J.; Robertson, D.; Rosolowsky, E.; Rumble, D.; Sadavoy, S; Thomas, H.; Tothill, N; Viti, S; White, GJ; Wilson, CD; Wouterloot, J; Yates, J; Zhu, M (Oxford University Press for Royal Astronomical Society, 2015-05-01)
    We employ SCUBA-2 (Submillimetre Common-User Bolometer Array 2) observations of the Orion A North molecular cloud to derive column density and temperature maps. We apply a novel, Hessian-based structural identification ...
  • The JCMT Gould Belt Survey: dense core clusters in Orion B 

    Kirk, H; Johnstone, D; Di Francesco, J; Lane, J; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Hatchell, J; Jenness, T; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Quinn, C; Salji, C; Tisi, S; Hogerheijde, MR; Ward-Thompson, D (American Astronomical Society, 2016-04-18)
    © 2016. The American Astronomical Society. All rights reserved.The James Clerk Maxwell Telescope Gould Belt Legacy Survey obtained SCUBA-2 observations of dense cores within three sub-regions of Orion B: LDN 1622, NGC ...
  • The JCMT Gould Belt Survey: Evidence for Dust Grain Evolution in Perseus Star-forming Clumps 

    Chun-Yuan Chen, M; Di Francesco, J; Johnstone, D; Sadavoy, S; Hatchell, J; Mottram, JC; Kirk, H; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Jenness, T; Nutter, D; Pattle, K; Pineda, JE; Quinn, C; Salji, C; Tisi, S; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chrysostomou, A; Coude, S; Davis, CJ; Drabek-Maunder, E; Duarte-Cabral, A; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Mowat, C; Pezzuto, S; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Rumble, D; Schneider-Bontemps, N; Thomas, H; Tothill, N; Viti, S; White, GJ; Wouterloot, J; Yates, J; Zhu, M (American Astronomical Society, 2016-07-25)
    The dust emissivity spectral index, β, is a critical parameter for deriving the mass and temperature of star-forming structures and, consequently, their gravitational stability. The β value is dependent on various dust ...
  • The JCMT Gould Belt Survey: evidence for radiative heating and contamination in the W40 complex 

    Rumble, D; Hatchell, J; Pattle, K; Kirk, H; Wilson, T; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Jenness, T; Johnstone, D; Mottram, JC; Nutter, D; Pineda, JE; Quinn, C; Salji, C; Tisi, S; Walker-Smith, S; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chen, M; Chrysostomou, A; Coude, S; Davis, CJ; Drabek-Maunder, E; Duarte-Cabral, A; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Mowat, C; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Sadavoy, S; Thomas, H; Tothill, N; Viti, S; White, GJ; Wouterloot, J; Yates, J; Zhu, M (Oxford University Press, 2016-05-26)
    We present SCUBA-2 450{\mu}m and 850{\mu}m observations of the W40 complex in the Serpens-Aquila region as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey (GBS) of nearby star-forming regions. We investigate ...
  • The JCMT gould belt survey: Evidence for radiative heating in serpens MWC 297 and its influence on local star formation 

    Rumble, D.; Hatchell, Jennifer; Gutermuth, Robert A.; Kirk, H.; Buckle, J.; Beaulieu, S.F.; Berry, D.S.; Broekhoven-Fiene, H.; Currie, M.J.; Fich, M.; Jenness, T.; Johnstone, D.; Mottram, J.C.; Nutter, D.; Pattle, K.; Pineda, J.E.; Quinn, Ciara; Salji, C.; Tisi, S.; Walker-Smith, S.; Di Francesco, J.; Hogerheijde, MR; Ward-Thompson, D.; Allen, L.E.; Cieza, L.A.; Dunham, M.M.; Harvey, P.M.; Stapelfeldt, K.R.; Bastien, P.; Butner, H.; Chen, M.; Chrysostomou, A.; Coude, S.; Davis, C.J.; Drabek-Maunder, Emily R.; Duarte-Cabral, A.; Fiege, J.; Friberg, P.; Friesen, R.; Fuller, G.A.; Graves, S.; Greaves, J.; Gregson, J.; Holland, W; Joncas, G.; Kirk, J.M.; Knee, L.B.G.; Mairs, S.; Marsh, K.; Matthews, B.C.; Moriarty-Schieven, G.; Rawlings, J.; Richer, J.; Robertson, D.; Rosolowsky, E.; Sadavoy, S.I.; Thomas, H.; Tothill, N.; Viti, S.; White, G.J.; Wilson, C.D.; Wouterloot, J.; Yates, J.; Zhu, Ming (Oxford University Press for Royal Astronomical Society, 2015-02-14)
    We present SCUBA-2 450 and 850 μm observations of the Serpens MWC 297 region, part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey of nearby star-forming regions. Simulations suggest that radiative feedback ...
  • The JCMT Gould Belt Survey: first results from the SCUBA-2 observations of the Ophiuchus molecular cloud and a virial analysis of its prestellar core population 

    Pattle, K; Ward-Thompson, D; Kirk, JM; White, GJ; Drabek-Maunder, E; Buckle, J; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, M; Fich, M; Hatchell, Jennifer; Kirk, H; Jenness, T; Johnstone, D; Mottram, JC (Oxford University Press for Royal Astronomical Society, 2015-06)
    In this paper, we present the first observations of the Ophiuchus molecular cloud performed as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey (GBS) with the SCUBA-2 instrument. We demonstrate methods ...
  • The JCMT Gould Belt Survey: low-mass proto-planetary discs from a SCUBA-2 census of NGC1333 

    Dodds, P; Greaves, J; Scholz, A; Hatchell, J; Holland, WS; JCMT Gould Belt Survey Team (Oxford University Press (OUP) on behalf of the Royal Astronomical Society, 2015)
    NGC1333 is a 1-2 Myr old cluster of stars in the Perseus molecular cloud. We used 850mu data from the Gould Belt Survey with SCUBA-2 on the JCMT to measure or place limits on disc masses for 82 Class II sources in this ...
  • The JCMT Gould Belt Survey: SCUBA-2 observations of circumstellar discs in L 1495 

    Buckle, JV; Drabek-Maunder, E; Greaves, J; Richer, JS; Matthews, BC; Johnstone, D; Kirk, H; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Hatchell, J; Jenness, T; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Salji, C; Tisi, S; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Butner, H; Chen, M; Chrysostomou, A; Coude, S; Davis, CJ; Duarte-Cabral, A; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Moriarty-Schieven, G; Rawlings, J; Rosolowsky, E; Rumble, D; Sadavoy, S; Thomas, H; Tothill, N; Viti, S; White, GJ; Wilson, CD; Wouterloot, J; Yates, J; Zhu, M (Oxford Journals, 2015-05-01)
    We present 850 and 450 μm data from the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey obtained with Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and characterize the dust attributes of Class I, Class II ...
  • The JCMT Gould Belt Survey: SCUBA-2 observations of radiative feedback in NGC1333 

    Hatchell, Jennifer; Wilson, T.; Drabek, E.; Curtis, E.; Richer, J.; Di Francesco, J.; Ward-Thompson, D. (Oxford University Press for Royal Astronomical Society, 2013)
    We present observations of NGC 1333 from SCUBA-2 on the James Clerk Maxwell Telescope (JCMT), observed as a JCMT Gould Belt Survey pilot project during the shared risk campaign when the first of four arrays was installed ...
  • The JCMT Gould Belt Survey: the effect of molecular contamination in SCUBA-2 observations of Orion A 

    Coudé, S; Bastien, P; Kirk, H; Johnstone, D; Drabek-Maunder, Emily R.; Graves, S; Hatchell, Jennifer; Chapin, EL; Gibb, AG; Matthews, B.C.; JCMT Gould Belt Survey Team (Royal Astronomical Society, 2016-04-01)
    Thermal emission from cold dust grains in giant molecular clouds can be used to probe the physical properties, such as density, temperature and emissivity in star-forming regions. We present the Submillimetre Common-User ...
  • The JCMT Gould Belt Survey: understanding the influence of outflows on Gould Belt clouds 

    Drabek-Maunder, Emily R.; Hatchell, Jennifer; Buckle, JV; Di Francesco, J.; Richer, J. (Royal Astronomical Society, 2016-03-01)
    Using James Clerk Maxwell Telescope (JCMT) Gould Belt Survey data from CO J = 3 → 2 isotopologues, we present a meta-analysis of the outflows and energetics of star-forming regions in several Gould Belt clouds. The majority ...
  • The JCMT Plane Survey: early results from the ℓ = 30° field 

    Moore, TJT; Plume, R; Thompson, MA; Parsons, H; Urquhart, JS; Eden, DJ; Dempsey, JT; Morgan, LK; Thomas, HS; Buckle, J; Brunt, CM; Butner, H; Carretero, D; Chrysostomou, A; deVilliers, HM; Fich, M; Hoare, MG; Manser, G; Mottram, JC; Natario, C; Olguin, F; Peretto, N; Polychroni, D; Redman, RO; Rigby, AJ; Salji, C; Summers, LJ; Berry, D; Currie, MJ; Jenness, T; Pestalozzi, M; Traficante, A; Bastien, P; diFrancesco, J; Davis, CJ; Evans, A; Friberg, P; Fuller, GA; Gibb, AG; Gibson, S; Hill, T; Johnstone, D; Joncas, G; Longmore, SN; Lumsden, SL; Martin, PG; Lu'o'ng, QN; Pineda, JE; Purcell, C; Richer, JS; Schieven, GH; Shipman, R; Spaans, M; Taylor, AR; Viti, S; Weferling, B; White, GJ; Zhu, M (Oxford University Press (OUP), 2015-09-17)
    We present early results from the JCMT (James Clerk Maxwell Telescope) Plane Survey (JPS), which has surveyed the northern inner Galactic plane between longitudes ℓ = 7° and ℓ = 63° in the 850-μm continuum with SCUBA-2 ...
  • Junctophilin-2 in the nanoscale organisation and functional signalling of ryanodine receptor clusters in cardiomyocytes 

    Munro, ML; Jayasinghe, ID; Wang, Q; Quick, A; Wang, W; Baddeley, D; Wehrens, XH; Soeller, C (Company of Biologists, 2016-10-21)
    Signalling nanodomains requiring close contact between the plasma membrane and internal compartments, known as 'junctions', are fast communication hubs within excitable cells such as neurones and muscle. Here we have ...
  • The KdV hierarchy in optics 

    Horsley, SAR (IOP Publishing: Hybrid Open Access, 2016-07-20)
    There is a well explored relationship between quantum mechanical scattering from a potential and the Korteweg–de Vries (KdV) equation of fluid dynamics: if the potential is ‘evolved’ according to the KdV equation then it ...
  • The Keele-Exeter young cluster survey - I. Low-mass pre-main-sequence stars in NGC 2169 

    Jeffries, RD; Oliveira, JM; Naylor, T; Mayne, NJ; Littlefair, SP (Oxford University Press (OUP) / Royal Astronomical Society, 2007-04-01)
    We have used RCIC CCD photometry from the Isaac Newton telescope and intermediate-resolution spectroscopy from the Gemini North telescope to identify and characterize low-mass (0.15 < M/M⊙ < 1.3) pre-main-sequence stars ...