Browsing University of Hertfordshire by Title

Now showing items 12266-12285 of 24093

    • The JCMT Legacy Survey: The Challenges of the JCMT Science Archive 

      Economou, F.; Jenness, T.; Chrysostomou, A.; Cavanagh, B.; Redman, R.; Berry, D.S. (Astronomical Society of the Pacific, 2008)
      The JCMT Legacy Survey (JLS) is an ambitious programme that will provide the first large-scale survey of the submillimetre sky. From planetary science through to cosmology, the first phase of the campaign will be using the ...

    • The JCMT nearby galaxies legacy survey - IV. Velocity dispersions in the molecular interstellar medium in spiral galaxies 

      Wilson, C. D.; Warren, B.E.; Irwin, J.; Knapen, Johan; Israel, F.P.; Sergeant, S.; Attewell, D.; Bendo, G.; Brinks, E.; Butner, H.; Clements, D.; Leech, J.; Mathews, H.E.; Muhle, S.; Mortier, A.M.J.; Parkin, T.J.; Petitpas, G.; Tan, B.K.; Tilanus, R.P.J.; Usero, Antonio; Vaccari, M.; van der Werf, P.; Wiegert, T.; Zhu, M. (2011)
      An analysis of large-area CO J = 3-2 maps from the James Clerk Maxwell Telescope for 12 nearby spiral galaxies reveals low velocity dispersions in the molecular component of the interstellar medium. The three lowest ...

    • The JCMT nearby galaxies legacy survey - V. The CO(J=3-2) distribution and molecular outflow in NGC 4631 

      Irwin, J.; Wilson, C. D.; Wiegert, T.; Bendo, G.; Warren, B.E.; Wang, Q.D.; Israel, F.P.; Sergeant, S.; Knapen, Johan; Brinks, E.; Tilanus, R.P.J.; van der Werf, P.; Muhle, S. (2011)
      We have made the first map of CO(J = 3-2) emission covering the disc of the edge-on galaxy, NGC 4631, which is known for its spectacular gaseous halo. The strongest emission, which we model with a Gaussian ring, occurs ...

    • The JCMT Nearby Galaxies Legacy Survey - VIII : CO data and the L -L correlation in the SINGS sample 

      Wilson, C.D.; Warren, B.E.; Israel, F.P.; Serjeant, S.; Attewell, D.; Bendo, G. J.; Butner, H. M.; Chanial, P.; Clements, D. L.; Golding, J.; Heesen, V.; Irwin, J.; Leech, J.; Matthews, H.E.; Muhle, S.; Mortier, A.M.J.; Petitpas, G.; Sánchez-Gallego, J.R.; Sinukoff, E.; Shorten, K.; Tan, B.K.; Tilanus, R.P.J.; Usero, A.; Vaccari, M.; Wiegert, T.; Zhu, M.; Alexander, D.M.; Alexander, P.; Azimlu, M.; Barmby, P.; Brar, R.; Bridge, C.; Brinks, E.; Brooks, S.; Coppin, Kristen; Côté, S.; Côté, P.; Courteau, S.; Davies, J.; Eales, S.; Fich, M.; Hudson, M.; Hughes, D.H.; Ivison, R.J.; Knapen, J.H.; Page, M.; Parkin, T.J.; Rigopoulou, D.; Rosolowsky, E.; Seaquist, E.R.; Spekkens, K.; Tanvir, N.; van der Hulst, J.M.; van der Werf, P.; Vlahakis, C.; Webb, T.M.; Weferling, B.; White, G.J. (2012-08-21)
      The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey (NGLS) comprises an Hi-selected sample of 155 galaxies spanning all morphological types with distances less than 25Mpc. We describe the scientific goals of ...

    • The JCMT Nearby Galaxies Legacy Survey -- XI. -- Environmental Variations in the Atomic and Molecular Gas Radial Profiles of Nearby Spiral Galaxies 

      Mok, Angus; Wilson, C. D.; Knapen, Johan; Sanchez-Gallego, J. R.; Brinks, Elias; Rosolowsky, E. (2017-06-01)
      We present an analysis of the radial profiles of a sample of 43 HI-flux selected spiral galaxies from the Nearby Galaxies Legacy Survey (NGLS) with resolved James Clerk Maxwell Telescope (JCMT) CO $J=3-2$ and/or Very Large ...

    • The JCMT Nearby Galaxies Legacy Survey – III. Comparisons of cold dust, polycyclic aromatic hydrocarbons, molecular gas and atomic gas in NGC 2403 

      Bendo, G.; Wilson, C.D.; Warren, B.E.; Brinks, E.; Butner, H.; Chanial, P.; Clements, D.; Courteau, S.; Irwin, J.; Israel, F.P.; Knapen, J.; Leech, J.; Matthews, H.; Muhle, S.; Petitpas, G.; Serjeant, S.; Tan, B.K.; Tilanus, R.P.J.; Usero, A.; Vaccari, M.; van der Werf, P.; Vlahakis, C.; Wiegert, T.; Zhu, M. (2010)
      We used Spitzer Space Telescope 3.6, 8.0, 70 and 160 μm data, James Clerk Maxwell Telescope HARP-B CO J= (3–2) data, National Radio Astronomy Observatory 12 m telescope CO J= (1–0) data and Very Large Array H i data to ...

    • The JCMT Plane Survey : First complete data release - emission maps and compact source catalogue 

      Eden, D.~J.; Moore, T. J. T.; Plume, R.; Urquhart, J.S.; Thompson, M. A.; Parsons, H.; Dempsey, J. T.; Rigby, A.~J.; Morgan, L. K.; Thomas, H. S.; Berry, D J; Buckle, J.; Brunt, Christopher M.; Butner, H. M.; Carretero, D.; Chrysostomou, A.; Currie, M. J.; deVilliers, H.~M.; Fich, M.; Gibb, A. G.; Hoare, M.G.; Jenness, T.; Manser, G.; Mottram, J.~C.; Natario, C.; Olguin, F.; Peretto, N.; Pestalozzi, M.; Polychroni, D.; Redman, R.~O.; Salji, C.; Summers, L.~J.; Tahani, K.; Traficante, A.; diFrancesco, J.; Evans, A.; Fuller, G. A.; Johnstone, D.; Joncas, G.; Longmore, S.~N.; Martin, Gary P; Richer, J. S.; Weferling, B.; White, Glenn J.; Zhu, M. (2017-08-01)
      We present the first data release of the James Clerk Maxwell Telescope (JCMT) Plane Survey (JPS), the JPS Public Release 1 (JPSPR1). JPS is an 850-um continuum survey of six fields in the northern inner Galactic Plane in ...

    • The JCMT Plane Survey: early results from the ell = 30deg field 

      Moore, T.~J.~T.; Plume, R.; Thompson, M.~A.; Parsons, H.; Urquhart, J.~S.; Eden, D.~J.; Dempsey, J.~T.; Morgan, L.~K.; Thomas, H.~S.; Buckle, J.; Brunt, C.~M.; Butner, H.; Carretero, D.; Chrysostomou, A.; deVilliers, H.~M.; Fich, M.; Hoare, M.~G.; Manser, G.; Mottram, J.~C.; Natario, C.; Olguin, F.; Peretto, N.; Polychroni, D.; Redman, R.~O.; Rigby, A.~J.; Salji, C.; Summers, L.~J.; Berry, D.; Currie, M.~J.; Jenness, T.; Pestalozzi, M.; Traficante, A.; Bastien, P.; diFrancesco, J.; Davis, C.~J.; Evans, A.; Friberg, P.; Fuller, G.~A.; Gibb, A.~G.; Gibson, S.; Hill, T.; Johnstone, D.; Joncas, G.; Longmore, S.~N.; Lumsden, S.~L.; Martin, P.~G.; Lu'o'ng, Q.~N.; Pineda, J.~E.; Purcell, C.; Richer, J.~S.; Schieven, G.~H.; Shipman, R.; Spaans, M.; Taylor, A.~R.; Viti, S.; Weferling, B.; White, G.~J.; Zhu, M. (2015-11-11)
      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 ...

    • The JCMT Transient Survey : Single Epoch Transients and Variability of Faint Sources 

      Johnstone, Doug; Lalchand, Bhavana; Mairs, Steve; Shang, Hsien; Chen, Wen Ping; Bower, Geoffrey C.; Herczeg, Gregory J.; Lee, Jeong-Eun; Forbrich, Jan; Chen, Bo-Yan; Contreras-Pena, Carlos; Lee, Yong-Hee; Park, Wooseok; Broughton, Colton; Plovie, Spencer; Team, The JCMT Transient (2022-09-15)
      Short-duration flares at millimeter wavelengths provide unique insights into the strongest magnetic reconnection events in stellar coronae, and combine with longer-term variability to introduce complications to next-generation ...

    • The JCMT Transient Survey: An Extraordinary Submillimeter Flare in the T Tauri Binary System JW 566 

      Mairs, Steve; Lalchand, Bhavana; Bower, Geoffrey C.; Forbrich, Jan; Bell, Graham S.; Herczeg, Gregory J.; Johnstone, Doug; Chen, Wen-Ping; Lee, Jeong-Eun; Hacar, Alvaro (2019-01-23)
      The binary T Tauri system JW 566 in the Orion Molecular Cloud underwent an energetic, short-lived flare observed at submillimetre wavelengths by the SCUBA-2 instrument on 26 November 2016 (UT). The emission faded by nearly ...

    • The JCMT Transient Survey: Four-year Summary of Monitoring the Submillimeter Variability of Protostars 

      Lee, Yong-Hee; Johnstone, Doug; Lee, Jeong-Eun; Herczeg, Gregory; Mairs, Steve; Contreras-Peña, Carlos; Hatchell, Jennifer; Naylor, Tim; Bell, Graham S.; Bourke, Tyler L.; Broughton, Colton; Francis, Logan; Gupta, Aashish; Harsono, Daniel; Liu, Sheng-Yuan; Park, Geumsook; Plovie, Spencer; Moriarty-Schieven, Gerald H.; Scholz, Aleks; Sharma, Tanvi; Teixeira, Paula Stella; Wang, Yao-Te; Aikawa, Yuri; Bower, Geoffrey C.; Chen, Huei-Ru Vivien; Bae, Jaehan; Baek, Giseon; Chapman, Scott; Chen, Wen Ping; Du, Fujun; Dutta, Somnath; Forbrich, Jan; Guo, Zhen; Inutsuka, Shu-ichiro; Kang, Miju; Kirk, Helen; Kuan, Yi-Jehng; Kwon, Woojin; Lai, Shih-Ping; Lalchand, Bhavana; Lane, James M. M.; Lee, Chin-Fei; Liu, Tie; Morata, Oscar; Pearson, Samuel; Pon, Andy; Sahu, Dipen; Shang, Hsien; Stamatellos, Dimitris; Tang, Shih-Yun; Xu, Ziyan; Yoo, Hyunju (2021-10-21)
      We present the four-year survey results of monthly submillimeter monitoring of eight nearby ($<500 $pc) star-forming regions by the JCMT Transient Survey. We apply the Lomb-Scargle Periodogram technique to search for and ...

    • JEMS: A Deep Medium-band Imaging Survey in the Hubble Ultra Deep Field with JWST NIRCam and NIRISS 

      Williams, Christina C.; Tacchella, Sandro; Maseda, Michael V.; Robertson, Brant E.; Johnson, Benjamin D.; Willott, Chris J.; Eisenstein, Daniel J.; Willmer, Christopher N. A.; Ji, Zhiyuan; Hainline, Kevin N.; Helton, Jakob M.; Alberts, Stacey; Baum, Stefi; Bhatawdekar, Rachana; Boyett, Kristan; Bunker, Andrew J.; Carniani, Stefano; Charlot, Stephane; Chevallard, Jacopo; Curtis-Lake, Emma; de Graaff, Anna; Egami, Eiichi; Franx, Marijn; Kumari, Nimisha; Maiolino, Roberto; Nelson, Erica J.; Rieke, Marcia J.; Sandles, Lester; Shivaei, Irene; Simmonds, Charlotte; Smit, Renske; Suess, Katherine A.; Sun, Fengwu; Übler, Hannah; Witstok, Joris (2023-10-09)
      We present JWST Extragalactic Medium-band Survey, the first public medium-band imaging survey carried out using JWST/NIRCam and NIRISS. These observations use ∼2 and ∼4 μm medium-band filters (NIRCam F182M, F210M, F430M, ...

    • The Jet Angular Profile and the Afterglow Light Curves 

      Granot, J.; Kumar, P.; Piran, T. (2004)

    • Jet Feedback in Star-Forming Galaxies 

      Krause, Martin (2023-02-12)
      In this paper, I review our understanding of how jet feedback works in star-forming galaxies. There are some interesting differences to radiative feedback from Active Galactic Nuclei (AGN). Jets act on galaxy haloes as ...

    • The jet heated x-ray filament in the Centaurus A northern middle radio lobe 

      Kraft, R.P.; Forman, W.R.; Hardcastle, M.J.; Birkinshaw, M.; Croston, J.H.; Jones, C.; Nulsen, P.E.J.; Worrall, D.M.; Murray, S.S. (2009)
      We present results from a 40 ks XMM-Newton observation of the X-ray filament coincident with the southeast edge of the Centaurus A Northern Middle Radio Lobe (NML). We find that the X-ray filament consists of five spatially ...

    • Jet interactions with a giant molecular cloud in the Galactic centre and ejection of hypervelocity stars 

      Silk, J.; Antonuccio-Delogu, V.; Dubois, Y.; Gaibler, V.; Haas, M.~R.; Khochfar, S.; Krause, Martin (2012-09-21)
      The hypervelocity OB stars in the Milky Way Galaxy were ejected from the central regions some 10-100 million years ago. We argue that these stars, as well as many more abundant bound OB stars in the innermost few parsecs, ...

    • Jet Kinematics of AGNs at High Radio Frequencies 

      Jorstad, S.G.; Marscher, A.P.; Lister, M.; Stirling, A.M.; Cawthorne, T.V.; Gomez, J-L.; Gear, W.K.; Stevens, J. A.; Robson, E.I.; Smith, P.S.; Forster, J.R. (Astronomical Society of the Pacific, 2006)
      We have completed a 3 yr program of polarization monitoring of 15 active galactic nuclei with the Very Long Baseline Array at 7 mm wavelength. At some epochs the images are accompanied by nearly simultaneous polarization ...

    • Jet speeds in wide angle tailed radio galaxies 

      Jetha, N.N.; Hardcastle, M.J.; Sakelliou, I. (2006)

    • Jet termination in wide-angle tail radio sources 

      Hardcastle, M.J.; Sakelliou, I. (2004-04)

    • Jet-induced star formation in gas-rich galaxies 

      Gaibler, V.; Khochfar, S.; Krause, M.; Silk, J. (2012-09-01)
      Feedback from active galactic nuclei (AGN) has become a major component in simulations of galaxy evolution, in particular for massive galaxies. AGN jets have been shown to provide a large amount of energy and are capable ...