Now showing items 500-519 of 1136

  • 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 ...
  • Jarzynski equality for a gas particle driven out of equilibrium 

    Philbin, TG; Anders, J (arXiv.org, 2014-04-21)
    One particle in a classical perfect gas is driven out of equilibrium by changing its mass over a short time interval. The work done on the driven particle depends on its collisions with the other particles in the gas. This ...
  • The JCMT and Herschel Gould Belt Surveys: a comparison of SCUBA-2 and Herschel data of dense cores in the Taurus dark cloud L1495 

    Ward-Thompson, D; Pattle, K; Kirk, JM; Marsh, K; Buckle, J; Hatchell, J; Nutter, DJ; Griffin, MJ; Di Francesco, J; André, P; Beaulieu, S; Berry, D; Broekhoven-Fiene, H; Currie, M; Fich, M; Jenness, T; Johnstone, D; Kirk, H; Mottram, J; Pineda, J; Quinn, C; Sadavoy, S; Salji, C; Tisi, S; Walker-Smith, S; White, G; Hill, T; Könyves, V; Palmeirim, P; Pezzuto, S (Oxford University Press (OUP) / Royal Astronomical Society, 2016-08-16)
    We present a comparison of Submillimetre Common User Bolometer Array-2 (SCUBA-2) 850-μm and Herschel 70-500-μm observations of the L1495 filament in the Taurus Molecular Cloud with the goal of characterizing the SCUBA-2 ...
  • The JCMT BISTRO Survey: The Magnetic Field Strength in the Orion A Filament 

    Pattle, K; Ward-Thompson, D; Berry, D; Hatchell, J; Chen, H; Pon, A; Koch, PM; Kwon, W; Kim, J; Bastien, P; Cho, J; Coudé, S; Di Francesco, J; Fuller, G; Furuya, RS; Graves, SF; Johnstone, D; Kirk, J; Kwon, J; Lee, CW; Matthews, BC; Mottram, JC; Parsons, H; Sadavoy, S; Shinnaga, H; Soam, A; Hasegawa, T; Lai, S; Qiu, K; Friberg, P (American Astronomical Society / IOP Publishing, 2017-09-08)
    We determine the magnetic field strength in the OMC 1 region of the Orion A filament via a new implementation of the Chandrasekhar-Fermi method using observations performed as part of the James Clerk Maxwell Telescope ...
  • 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 First Look at IC 5146 

    Johnstone, D; Ciccone, S; Kirk, H; Mairs, S; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Hatchell, J; Jenness, T; Mottram, JC; Pattle, K; Tisi, S; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chen, M; Chrysostomou, A; Coudé, S; Davis, CJ; Drabek-Maunder, E; Duarte-Cabral, A; Fich, M; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Mowat, C; Nutter, D; Pineda, JE; Salji, C; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Rumble, D; Sadavoy, S; Thomas, H; Tothill, N; Viti, S; White, GJ; Wouterloot, J; Yates, J; Zhu, M (American Astronomical Society / IOP Publishing, 2017-02-14)
    We present 450 and 850 μm submillimeter continuum observations of the IC 5146 star-forming region taken as part of the James Clerk Maxwell Telescope Gould Belt Survey. We investigate the location of bright submillimeter ...
  • The JCMT Gould Belt Survey: A First Look at SCUBA-2 Observations of the Lupus I Molecular Cloud 

    Mowat, C; Hatchell, J; Rumble, D; Kirk, H; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Jenness, T; Johnstone, D; Mottram, JC; Pattle, K; Tisi, S; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chen, M; Chrysostomou, A; Coudé, S; Davis, CJ; Drabek-Maunder, E; Duarte-Cabral, A; Fich, M; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Rawlings, J; Retter, B; 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 (OUP) / Royal Astronomical Society, 2017-01-01)
    This paper presents observations of the Lupus I molecular cloud at 450 and 850 µm with SCUBA-2 as part of the James Clerk Maxwell Telescope Gould Belt Survey (JCMT GBS). Nine compact sources, assumed to be the disks of ...
  • The JCMT Gould Belt Survey: A first look at Southern Orion A with SCUBA-2 

    Mairs, S; Johnstone, D; Kirk, H; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Graves, S; Hatchell, J; Jenness, T; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Salji, C; Di Francesco, J; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chen, M; Chrysostomou, A; Coudé, S; Davis, CJ; Drabek-Maunder, E; Duarte-Cabra, A; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Mowat, C; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Rumble, D; Sadavoy, S; Thomas, H; Tothill, N; Viti, S; White, GJ; Wouterloot, J; Yates, J; Zhu, M (Oxford University Press (OUP) / Royal Astronomical Society, 2016-06-28)
    We present the JCMT Gould Belt Survey's first look results of the southern extent of the Orion A Molecular Cloud ( δ ≤ -5:31:27.5). Employing a two-step structure identification process, we construct individual catalogues ...
  • 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 A 

    Lane, J; Kirk, H; Johnstone, D; Mairs, S; Di Francesco, J; Sadavoy, S; Hatchell, J; Berry, DS; Jenness, T; Hogerheijde, MR; Ward-Thompson, D; The JCMT Gould Belt Survey Team (American Astronomical Society / IOP Publishing, 2016-12-06)
    The Orion A molecular cloud is one of the most well-studied nearby star-forming regions, and includes regions of both highly clustered and more dispersed star formation across its full extent. Here, we analyze dense, ...
  • 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 SCUBA-2 observations of the Cepheus Flare region 

    Pattle, K; Ward-Thompson, D; Kirk, JM; Di Francesco, J; Kirk, H; Mottram, JC; Keown, J; Buckle, J; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Hatchell, J; Jenness, T; Johnstone, D; Nutter, D; Pineda, JE; Quinn, C; Salji, C; Tisi, S; Walker-Smith, S; Hogerheijde, MR; Bastien, P; Bresnahan, D; Butner, H; Chen, M; Chrysostomou, A; Coudé, 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; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Mowat, C; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Rumble, D; Sadavoy, S; Thomas, H; Tothill, N; Viti, S; White, GJ; Wouterloot, J; Yates, J; Zhu, M (Oxford University Press (OUP) / Royal Astronomical Society, 2016-10-14)
    We present observations of the Cepheus Flare obtained as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Legacy Survey (GBLS) with the SCUBA-2 instrument. We produce a catalogue of sources found by SCUBA-2, and ...
  • 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 ...