Browsing University of Hertfordshire by Author "Chrysostomou, A."

Now showing items 1-20 of 95

    • 3 MU M Spectropolarimetry of 1120 Ice in Young Stellar Objects 

      Chrysostomou, A.; Hough, J.; Messinger, D.W.; Whittet, D.C.B.; Aitken, D.; Hoche, P.F. (Astronomical Society of the Pacific, 1996)
      Spectropolarimetry of the water-ice feature at 3.1um towards a number of YSOs is presented. The data show that excesses of polarization and changes in position angle across the feature are common. The polarization excess ...

    • 3.4 Micron Feature on the Shoulder of Ice-Band Absorptions in Three Luminous Young Stellar Objects: IRAS 18511 0146, IRAS 21413 5442, and IRAS 04579 4703 

      Ishii, M.; Nagata, T.; Chrysostomou, A.; Hough, J. (2002-11)
      An absorption feature at 3.4 lm has been detected in the long-wavelength wing of the 3.1 lm H2O ice feature in three young stellar objects: IRAS 18511+0146, IRAS 21413+5442, and IRAS 04579+4703. The profile of the 3.4 lm ...

    • The 6-GHz methanol multibeam maser catalogue – I. Galactic Centre region, longitudes 345° to 6° 

      Caswell, J.L.; Fuller, G.A.; Green, J.A.; Avison, A.; Breen, S.L.; Brooks, K.; Burton, M.G.; Chrysostomou, A.; Cox, J.; Diamond, P.J.; Ellingsen, S.; Gray, M.D.; Hoare, M.G.; Masheder, M.R.W.; McClure-Griffiths, N.; Pestalozzi, M.; Phillips, C.; Quinn, L.; Thompson, M.A.; Voronkov, M.; Walsh, A.; Ward-Thompson, D.; Wong-McSweeney, D.; Yates, J.A.; Cohen, R.J. (2010)
      We have conducted a Galactic plane survey of methanol masers at 6668 MHz using a seven-beam receiver on the Parkes telescope. Here we present results from the first part, which provides sensitive unbiased coverage of a ...

    • The 6-GHz multibeam maser survey – I. Techniques 

      Green, J.A.; Caswell, J.L.; Fuller, G.A.; Avison, A.; Breen, S.L.; Brooks, K.; Burton, M.; Chrysostomou, A.; Cox, J.; Diamond, P.J.; Ellingsen, S.; Gray, M.D.; Hoare, M.G.; Masheder, M.R.W.; McClure-Griffiths, N.; Pestalozzi, M.; Phillips, C.; Quinn, L.; Thompson, M.A.; Voronkov, M.; Walsh, A.; Ward-Thompson, D.; Wong-McSweeney, D.; Yates, J.A.; Cohen, R.J. (2009)
      A new 7-beam 6−7 GHz receiver has been built to survey the Galaxy and the Magellanic Clouds for newly forming high-mass stars that are pinpointed by strong methanol maser emission at 6668 MHz. The receiver was jointly ...

    • 6.7-GHz methanol maser associated outflows : an evolutionary sequence 

      De Villiers, Helena Maria; Chrysostomou, A.; Thompson, M.A.; Urquhart, J.S.; Breen, S.L.; Burton, M.G.; Ellingsen, S.P.; Fuller, G.A.; Pestalozzi, Michele; Voronkov, M. A.; Ward-Thompson, D. (2015-05-01)
      We present a continuing study of a sample 44 molecular outflows, observed in 13CO lines, closely associated with 6.7-GHz methanol masers, hence called methanol maser associated outflows (MMAOs). We compare MMAO properties ...

    • Axisymmetry in protoplanetary nebulae: using imaging polarimetry to investigate envelope structure 

      Gledhill, T.; Chrysostomou, A.; Hough, J.; Yates, J.A. (2001-04)
      We use ground-based imaging polarimetry to detect and image the dusty circumstellar envelopes of a sample of proto-planetary nebulae (PPNe) at near-infrared wavelengths. This technique allows the scattered light from the ...

    • Circular Polarimetry and the line of sight to the Becklin-Neugebauer object 

      Aitken, D.; Hough, J.; Chrysostomou, A. (2006)

    • Circular polarimetry reveals helical magnetic fields in the young stellar object HH 135 136 

      Chrysostomou, A.; Lucas, P.W.; Hough, J. (2007)

    • Circular polarisation in star-forming regions : possible implications for homochirality 

      Hough, J.; Bailey, J.; Chrysostomou, A.; Gledhill, T.; Lucas, P.W.; Tamura, M.; Clark, S.; Yates, J.A.; Menard, F. (2001)

    • Circular Polarization in Star- Formation Regions : Implications for Biomolecular Homochirality 

      Bailey, J.; Chrysostomou, A.; Hough, J.; Gledhill, T.; McCall, A.; Clark, S.; Menard, F.; Tamura, M. (1998)
      Strong infrared circular polarization resulting from dust scattering in reflection nebulae in the Orion OMC-1 star-formation region has been observed. Circular polarization at shorter wavelengths might have been important ...

    • Circumstellar structure of RU Lupi down to au scales 

      Takami, M.; Bailey, J.; Gledhill, T.; Chrysostomou, A.; Hough, J. (2001-05)

    • Clouds, filaments, and protostars : The Herschel Hi-GAL Milky Way 

      Molinari, S.; Swinyard, B.; Bally, J.; Barlow, M.; Bernard, J.-P.; Martin, P.; Moore, T.; Noriega-Crespo, A.; Plume, R.; Testi, L.; Zavagno, A.; Abergel, A.; Ali, B.; Anderson, L.; André, P.; Baluteau, J.-P.; Battersby, C.; Beltrán, M. T.; Benedettini, M.; Billot, N.; Blommaert, J.; Bontemps, S.; Boulanger, F.; Brand, J.; Brunt, C.; Burton, M.; Calzoletti, L.; Carey, S.; Caselli, P.; Cesaroni, R.; Cernicharo, J.; Chakrabarti, S.; Chrysostomou, A.; Cohen, M.; Compiegne, M.; de Bernardis, P.; de Gasperis, G.; di Giorgio, A.M.; Elia, D.; Faustini, F.; Flagey, N.; Fukui, Y.; Fuller, G.A.; Ganga, K.; Garcia-Lario, P.; Glenn, J.; Goldsmith, P.F.; Griffin, M.; Hoare, M.; Huang, M.; Ikhenaode, D.; Joblin, C.; Joncas, G.; Juvela, M.; Kirk, J.M.; Lagache, G.; Li, J.Z.; Lim, T.L.; Lord, S.D.; Marengo, M.; Marshall, D.J.; Masi, S.; Massi, F.; Matsuura, M.; Minier, V.; Miville-Deschênes, M.-A.; Montier, L.A.; Morgan, L.; Motte, F.; Mottram, J.C.; Müller, T.G.; Natoli, P.; Neves, J.; Olmi, L.; Paladini, R.; Paradis, D.; Parsons, H.; Peretto, N.; Pestalozzi, M.; Pezzuto, S.; Piacentini, F.; Piazzo, L.; Polychroni, D.; Pomarès, M.; Popescu, C. C.; Reach, W.T.; Ristorcelli, I.; Robitaille, J.-F.; Robitaille, T.; Rodón, J.A.; Roy, A.; Royer, P.; Russeil, D.; Saraceno, P.; Sauvage, M.; Schilke, P.; Schisano, E.; Schneider, N.; Schuller, F.; Schulz, B.; Sibthorpe, B.; Smith, H. A.; Smith, M.D.; Spinoglio, L.; Stamatellos, D.; Strafella, F.; Stringfellow, G.S.; Sturm, E.; Taylor, R.; Thompson, Mark; Traficante, A.; Tuffs, R. J.; Umana, G.; Valenziano, L.; Vavrek, R.; Veneziani, M.; Viti, S.; Waelkens, C.; Ward-Thompson, D.; White, G.; Wilcock, L.A.; Wyrowski, F.; Yorke, H.W.; Zhang, Q. (2010-07-01)
      We present the first results from the science demonstration phase for the Hi-GAL survey, the Herschel key program that will map the inner Galactic plane of the Milky Way in 5 bands. We outline our data reduction strategy ...

    • Detection of a warm molecular wind in DG Tauri 

      Takami, M.; Chrysostomou, A.; Ray, T.P.; Davis, C.J.; Dent, W.R.; Bailey, J.; Tamura, M.; Terada, H. (2004-03)

    • Dust polarized emission observations of NGC 6334 : BISTRO reveals the details of the complex but organized magnetic field structure of the high-mass star-forming hub-filament network 

      BISTRO; Arzoumanian, D.; Furuya, R.; Hasegawa, T.; Tahani, M.; Sadavoy, S.; Hull, C. L. H.; Johnstone, D.; Koch, P. M.; Inutsuka, S. -i.; Doi, Y.; Hoang, T.; Onaka, T.; Iwasaki, K.; Shimajiri, Y.; Inoue, T.; Peretto, N.; André, P.; Bastien, P.; Berry, D.; Chen, H. -R. V.; Francesco, J. Di; Eswaraiah, C.; Fanciullo, L.; Fissel, L. M.; Hwang, J.; Kang, J. -h.; Kim, G.; Kim, K. -T.; Kirchschlager, F.; Kwon, W.; Liu, H. -L.; Lyo, A. -R.; Pattle, K.; Soam, A.; Tang, X.; Whitworth, A.; Ching, T. -C.; Coudé, S.; Ward-Thompson, D.; Lai, S. -P.; Qiu, K.; Bourke, T. L.; Byun, D. -Y.; Chen, M.; Chen, Z.; Cho, J.; Choi, Y.; Chrysostomou, A.; Gledhill, T.; Parsons, H. (2021-03-11)
      Context. Molecular filaments and hubs have received special attention recently thanks to new studies showing their key role in star formation. While the (column) density and velocity structures of both filaments and hubs ...

    • Erratum: A spectro-astrometric study of southern pre-main sequence stars. Binaries, outflows, and disc structure down to AU scales 

      Takami, M.; Bailey, J.; Chrysostomou, A. (2003-04)

    • An Extended Search for Circularly Polarized Infrared Radiation from the OMC-1 Region of Orion 

      Buschermohle, M.; Whittet, D.C.B.; Chrysostomou, A.; Hough, J.; Lucas, P.W.; Adamson, A.J.; Whitney, B.A.; Wolff, M.J. (2005-05)
      We present new observations of circular polarization (CP) at 2.2 m in the Orion (OMC-1) molecular cloud. Our results extend a previously published study of the region.We show that the degree of CP correlates spatially with ...

    • First polarimetry results of two candidate high-mass protostellar objects 

      Curran, R.; Chrysostomou, A.; Collett, J.; Jenness, T.; Aitken, D. (2004-07)
      We present 850 μm imaging polarimetry of two high-mass star forming regions – W48 and S152. Within these regions we have identified two candidate high-mass protostellar objects – W48W and S152SE. The submillimetre continuum ...

    • First SCUBA Polarimetry of Two Candidate High-Mass Protostellar Objects 

      Curran, R.; Chrysostomou, A.; Collett, J.; Aitken, D.; Jenness, T. (Astronomical Society of the Pacific, 2005)
      We present the first polarimetry towards two candidate highmass protostellar objects - W48W and S152SE. The polarimetry across both candidate HMPOs is ordered with a high degree of polarization (6-8%) compared to that of ...

    • The formation of stars 

      Chrysostomou, A.; Lucas, P.W. (2005)
      We review the process of star formation, detailing the theories underlying the stability of molecular clouds and their collapse to protostars, and discussing the empirical evidence and models which inform them. We give ...

    • A General Catalogue of 6.7GHz Methanol Masers II: statistical analysis 

      Pestalozzi, M.; Chrysostomou, A.; Collett, J.; Minier, V.; Conway, J.; Booth, R. (2007)