Browsing University of Hertfordshire by Author "Martin, P."

Now showing items 1-14 of 14

    • A 100 pc elliptical and twisted ring of cold and dense molecular clouds revealed by Herschel around the galactic center 

      Molinari, S.; Bally, J.; Noriega-Crespo, A.; Compiegne, M.; Bernard, J.P.; Paradis, D.; Martin, P.; Testi, L.; Barlow, M.; Moore, T.; Plume, R.; Swinyard, B.; Zavagno, A.; Calzoletti, L.; M. Di Giorgio, A.; Elia, D.; Faustini, F.; Natoli, P.; Pestalozzi, Michele; Pezzuto, S.; Piacentini, F.; Polenta, G.; Polychroni, D.; Schisano, E.; Traficante, A.; Veneziani, M.; Battersby, C.; Burton, M.; Carey, S.; Fukui, Y.; Li, J.Z.; Lord, S.D.; Morgan, L.; Motte, F.; Schuller, F.; Stringfellow, G.S.; Tan, J.C.; Thompson, Mark; Ward-Thompson, D.; White, G.; Umana, G. (2011)
      Thermal images of cold dust in the Central Molecular Zone of the Milky Way, obtained with the far-infrared cameras on board the Herschel satellite, reveal a ~3 × 107 M ring of dense and cold clouds orbiting the Galactic ...

    • Characterizing precursors to stellar clusters with Herschel 

      Battersby, C.; Bally, J.; Ginsburg, A.; Bernard, J.-P.; Brunt, C.; Fuller, G.A.; Martin, P.; Molinari, S.; Mottram, J.; Peretto, N.; Testi, L.; Thompson, Mark (2011-11-01)
      Context. Despite their profound effect on the universe, the formation of massive stars and stellar clusters remains elusive. Recent advances in observing facilities and computing power have brought us closer to understanding ...

    • 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 ...

    • Cores in infrared dark clouds (IRDCs) seen in the Hi-GAL survey between l=300 degrees and 330 degrees 

      Wilcock, L.A.; Ward-Thompson, D.; Kirk, J.M.; Stamatellos, D.; Whitworth, A.; Elia, D.; Fuller, G.A.; DiGiorgio, A.; Griffin, M.J.; Molinari, S.; Martin, P.; Mottram, J. C.; Peretto, N.; Pestalozzi, M.; Schisano, E.; Plume, R.; Smith, H. A.; Thompson, M. A. (2012-05)
      We have used data taken as part of the Herschel infrared Galactic Plane survey (Hi-GAL) to study 3171 infrared dark cloud (IRDC) candidates that were identified in the mid-IR (8 mu m) by Spitzer (we refer to these as ...

    • Giving physical significance to the Hi-GAL data : determining the distance of cold dusty cores in the Milky Way 

      Russeil, D.; Pestalozzi, M.; Mottram, J.C.; Bontemps, S.; Anderson, L.D.; Zavagno, A.; Beltran, M.T.; Bally, J.; Brand, J.; Brunt, C.; Cesaroni, R.; Joncas, G.; Marshall, D.; Martin, P.; Massi, F.; Molinari, S.; Moore, T.J.T.; Noriega-Crespo, A.; Olmi, L.; Thompson, M.A.; Wienen, M.; Wyrowski, F. (2011)
      Context: Hi-GAL, an open time key-project of the Herschel satellite, was awarded 343 hours observing time to carry out a 5-band photometric imaging survey at 70, 160, 250, 350, and 500 mu m of a vertical bar b vertical bar ...

    • A Herschel study of YSO evolutionary stages and formation timelines in two fields of the Hi-GAL survey 

      Elia, D.; Schisano, E.; Molinari, S.; Robitaille, T.; Anglés-Alcázar, D.; Bally, J.; Battersby, C.; Benedettini, M.; Billot, N.; Calzoletti, L.; Di Giorgio, A. M.; Faustini, F.; Li, J. Z.; Martin, P.; Morgan, L.; Motte, F.; Mottram, J.C.; Natoli, P.; Olmi, L.; Paladini, R.; Piacentini, F.; Pestalozzi, M.; Pezzuto, S.; Polychroni, D.; Smith, M.; Strafella, F.; Stringfellow, G. S.; Testi, L.; Thompson, M.A.; Traficante, A.; Veneziani, M. (2010-05-11)
      We present a first study of the star-forming compact dust condensations revealed by Herschel in the two 2 \times 2 \degr Galactic Plane fields centered at [l;b] = [30\degr; 0 \degr] and [l;b] = [59\degr; 0 \degr], respectively, ...

    • Hi-GAL: The Herschel Infrared Galactic Plane Survey 

      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.; André, P.; Baluteau, J.-P.; Benedettini, M.; Berné, O.; Billot, N. P.; Blommaert, J.; Bontemps, S.; Boulanger, F.; Brand, J.; Brunt, C.; Burton, M.; Campeggio, L.; Carey, S.; Caselli, P.; Cesaroni, R.; Cernicharo, J.; Chakrabarti, S.; Chrysostomou, A.; Codella, C.; Cohen, M.; Compiegne, M.; Davis, C.J.; de Bernardis, P.; de Gasperis, G.; Di Francesco, J.; Di Giorgio, A. M.; Elia, D.; Faustini, F.; Fischera, J.F.; Fukui, Y.; Fuller, G.A.; Ganga, K.; Garcia-Lario, P.; Giard, M.; Giardino, G.; Glenn, J.; Goldsmith, P.; Griffin, M.; Hoare, M.; Huang, M.; Jiang, B.; Joblin, C.; Joncas, G.; Juvela, M.; Kirk, J.; Lagache, G.; Li, J.Z.; Lim, T.L.; Lord, S.D.; Lucas, P.W.; Maiolo, B.; Marengo, M.; Marshall, D.; Masi, S.; Massi, F.; Matsuura, M.; Meny, C.; Minier, V.; Miville-Deschênes, M.-A.; Montier, L.; Motte, F.; Müller, T.G.; Natoli, P.; Neves, J.; Olmi, L.; Paladini, R.; Paradis, D.; Pestalozzi, M.; Pezzuto, S.; Piacentini, F.; Pomarès, M.; Popescu, C. C.; Reach, W.T.; Richer, J.; Ristorcelli, I.; Roy, A.; Royer, P.; Russeil, D.; Saraceno, P.; Sauvage, M.; Schilke, P.; Schneider-Bontemps, N.; Schuller, F.; Schultz, B.; Shepherd, D.S.; Sibthorpe, B.; Smith, H.A.; Smith, M.D.; Spinoglio, L.; Stamatellos, D.; Strafella, F.; Stringfellow, G.; Sturm, E.; Taylor, R.; Thompson, M.A.; Tuffs, R. J.; Umana, G.; Valenziano, L.; Vavrek, R.; Viti, S.; Waelkens, C.; Ward-Thompson, D.; White, G.; Wyrowski, F.; Yorke, H.W.; Zhang, Q. (2010-03-01)
      Hi-GAL, the Herschel infrared Galactic Plane Survey, is an Open Time Key Project of the Herschel Space Observatory. It will make an unbiased photometric survey of the inner Galactic plane by mapping a 2° wide strip in the ...

    • The initial conditions of high-mass star formation : radiative transfer models of IRDCs seen in the Herschel Hi-GAL survey 

      Wilcock, L.A.; Kirk, J.M.; Stamatellos, D.; Ward-Thompson, D.; Whitworth, A.; Battersby, C.; Brunt, C.; Fuller, G.A.; Griffin, M.; Molinari, S.; Martin, P.; Mottram, J.C.; Peretto, N.; Plume, R.; Smith, H.A.; Thompson, M.A. (2011)
      The densest infrared dark clouds (IRDCs) may represent the earliest observable stage of high-mass star formation. These clouds are very cold, hence they emit mainly at far-infrared and sub-mm wavelengths. For the first ...

    • Isolated starless cores in infrared dark clouds in the Hi-GAL survey 

      Wilcock, L.A.; Ward-Thompson, D.; Kirk, J.M.; Stamatellos, D.; Whitworth, A.; Battersby, C.; Elia, D.; Fuller, G.A.; DiGiorgio, A.; Griffin, M.J.; Molinari, S.; Martin, P.; Mottram, J.C.; Peretto, N.; Pestalozzi, M.; Schisano, E.; Smith, H.A.; Thompson, M.A. (2012-07-01)
      In a previous paper, we identified cores within infrared dark clouds. We regarded those without embedded sources as the least evolved and labelled them starless. Here we identify the most isolated starless cores and model ...

    • The LOFAR Multifrequency Snapshot Sky Survey (MSSS) : I. Survey description and first results 

      Heald, G. H.; Pizzo, R. F.; Orrú, E.; Breton, R. P.; Carbone, D.; Ferrari, C.; Hardcastle, M.J.; Jurusik, W.; Macario, G.; Mulcahy, D.; Rafferty, D.; Asgekar, A.; Brentjens, M.; Fallows, R. A.; Frieswijk, W.; Toribio, M. C.; Adebahr, B.; Arts, M.; Bell, M. R.; Bonafede, A.; Bray, J.; Broderick, J.; Cantwell, T.; Carroll, P.; Cendes, Y.; Clarke, A. O.; Croston, J. H.; Daiboo, S.; De Gasperin, F.; Gregson, J.; Harwood, J.; Hassall, T.; Heesen, V.; Horneffer, A.; van der Horst, A.J.; Iacobelli, M.; Jelić, V.; Jones, D.; Kant, D.; Kokotanekov, G.; Martin, P.; McKean, J. P.; Morabito, L. K.; Nikiel-Wroczyński, B.; Offringa, A.; Pandey, V. N.; Pandey-Pommier, M.; Pietka, M.; Pratley, L.; Riseley, C.; Rowlinson, A.; Sabater, J.; Scaife, A. M. M.; Scheers, L. H. A.; Sendlinger, K.; Shulevski, A.; Sipior, M.; Sobey, C.; Stewart, A. J.; Stroe, A.; Swinbank, J.; Tasse, C.; Trüstedt, J.; Varenius, E.; Van Velzen, S.; Vilchez, N.; Van Weeren, R. J.; Wijnholds, S.; Williams, W. L.; de Bruyn, A. G.; Nijboer, R.; Wise, M.; Alexov, A.; Anderson, J.; Avruch, I. M.; Beck, R.; Bell, M. E.; Van Bemmel, I.; Bentum, M. J.; Bernardi, G.; Best, P.; Breitling, F.; Brouw, W. N.; Brüggen, M.; Butcher, H. R.; Ciardi, B.; Conway, J. E.; De Geus, E.; De Jong, A.; De Vos, M.; Deller, A.; Dettmar, R. J.; Duscha, S.; Eislöffel, J.; Engels, D.; Falcke, H.; Fender, R.; Garrett, M.A.; Grießmeier, J.; Gunst, A. W.; Hamaker, J. P.; Hessels, J. W. T.; Hoeft, M.; Hörandel, J.; Holties, H. A.; Intema, H.; Jackson, N. J.; Jütte, E.; Karastergiou, A.; Klijn, W. F. A.; Kondratiev, V. I.; Koopmans, L. V. E.; Kuniyoshi, M.; Kuper, G.; Law, C.; Van Leeuwen, J.; Loose, M.; Maat, P.; Markoff, S.; McFadden, R.; McKay-Bukowski, D.; Mevius, M.; Miller-Jones, J. C A; Morganti, R.; Munk, H.; Nelles, A.; Noordam, J. E.; Norden, M. J.; Paas, H.; Polatidis, A. G.; Reich, W.; Renting, A.; Röttgering, H.; Schoenmakers, A.; Schwarz, D.; Sluman, J.; Smirnov, O.; Stappers, B. W.; Steinmetz, M.; Tagger, M.; Tang, Y.; Ter Veen, S.; Thoudam, S.; Vermeulen, R.; Vocks, C.; Vogt, C.; Wijers, R.A.M.J.; Wucknitz, O.; Yatawatta, S.; Zarka, P. (2015-10-01)
      We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky Low Frequency Array (LOFAR) imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. ...

    • Positron Annihilation in the Galaxy 

      Kierans, C.~A.; Beacom, J.~F.; Boggs, S.; Buckley, M.; Caputo, R.; Crocker, R.; De Becker, M.; Diehl, R.; Fryer, C.~L.; Griffin, S.; Hartmann, D.; Hays, E.; Jean, P.; Krause, M.~G.~H.; Linden, T.; Marcowith, A.; Martin, P.; Moiseev, A.; Oberlack, U.; Orlando, E.; Panther, F.; Prantzos, N.; Rothschild, R.; Seitenzahl, I.; Shrader, C.; Siegert, T.; Strong, A.; Tomsick, J.; Vestrand, W.~T.; Zoglauer, A. (2019-03-13)
      The 511 keV line from positron annihilation in the Galaxy was the first γ-ray line detected to originate from outside our solar system. Going into the fifth decade since the discovery, the source of positrons is still ...

    • A Study of the Chamaeleon-I Dark Cloud and T-Association - Part Six - Interstellar Polarization Grain Alignment and Magnetic Field 

      Whittet, D.C.B.; Gerakines, P.A.; Carkner, A.L.; Hough, J.; Martin, P.; Prusti, T.; Kilkenny, D. (1994)

    • Tidal dwarf candidates in a sample of interacting galaxies 

      Weilbacher, P.; Duc, P.A.; Fritze, U.; Martin, P.; Fricke, K.J. (2000)
      We present deep optical B,V,R images of a sample of 10 interacting systems which were selected for their resemblance to disturbed galaxies at high redshift. Photometry is performed on knots in the tidal features of the ...

    • Variations of the spectral index of dust emissivity from Hi-GAL observations of the Galactic plane 

      Paradis, D.; Veneziani, M.; Noriega-Crespo, A.; Paladini, R.; Piacentini, F.; Bernard, J.P.; de Bernardis, P.; Calzoletti, L.; Faustini, F.; Martin, P.; Masi, S.; Montier, L.; Natoli, P.; Ristorcelli, I.; Thompson, M.A.; Traficante, A.; Molinari, S. (2010)
      Context. Variations in the dust emissivity are critical for gas mass determinations derived from far-infrared observations, but also for separating dust foreground emission from the Cosmic Microwave Background (CMB). Hi-GAL ...