Browsing by Author "Centre for Astrophysics Research (CAR)"

Now showing items 301-320 of 3233

    • Branchings in the gamma process path revisited 

      Rauscher, T. (2006-01)
      The location of the (gamma,p)/(gamma,n) and (gamma,alpha)/(gamma,n) line at gamma process temperatures is discussed, using updated reaction rates based on global Hauser-Feshbach calculations. The results can be directly ...

    • 'The Brick' is not a brick : A comprehensive study of the structure and dynamics of the Central Molecular Zone cloud G0.253+0.016 

      Henshaw, J. D.; Ginsburg, A.; Haworth, T. J.; Longmore, S. N.; Kruijssen, J. M. D.; Mills, E. A. C.; Sokolov, V.; Walker, D. L.; Barnes, A. T.; Contreras, Y.; Bally, J.; Battersby, C.; Beuther, H.; Butterfield, N.; Dale, James; Henning, T.; Jackson, J. M.; Kauffmann, J.; Pillai, T.; Ragan, S.; Riener, M.; Zhang, Q. (2019-05-01)
      In this paper we provide a comprehensive description of the internal dynamics of G0.253+0.016 (a.k.a. 'the Brick'); one of the most massive and dense molecular clouds in the Galaxy to lack signatures of widespread star ...

    • The bright end of the infrared luminosity functions and the abundance of hyperluminous infrared galaxies 

      Wang, L.; Gao, F.; Best, P. N.; Duncan, K.; Hardcastle, M. J.; Kondapally, R.; Malek, K.; McCheyne, I.; Sabater, J.; Shimwell, T.; Tasse, C.; Bonato, M.; Bondi, M.; Cochrane, R. K.; Farrah, D.; Gurkan, G.; Haskell, P.; Pearson, W. J.; Prandoni, I.; Rottgering, H. J. A.; Smith, D. J. B.; Vaccari, M.; Williams, W. L. (2021-04-07)
      We provide the most accurate estimate yet of the bright end of the infrared (IR) luminosity functions (LFs) and the abundance of hyperluminous IR galaxies (HLIRGs) with IR luminosities > 10^13 L_solar, thanks to the ...

    • Bright Lyα emitters at z ~ 9 : Constraints on the LF from HizELS 

      Sobral, D.; Best, P.N.; Geach, J.E.; Smail, I.; Kurk, J.; Cirasuolo, M.; Casali, M.; Ivison, R.J.; Coppin, Kristen; Dalton, G.B. (2009-09-01)
      New results are presented, as part of the Hi-z Emission Line Survey (HizELS), from the largest area survey to date (1.4 deg ) for Lyα emitters (LAEs) at z ~ 9. The survey, which is primarily targeting Hα emitters at z <3, ...

    • The brightest pure-H ultracool white dwarf 

      Catalan, S.; Tremblay, P. -E.; Pinfield, D.J.; Smith, Leigh; Zhang, Z. H.; Napiwotzki, R.; Marocco, F.; Day-Jones, A. C.; Gomes, J.; Forde, K.P.; Lucas, P.W.; Jones, H.R.A. (2012-10)
      We report the identification of LSR J0745+2627 in the United Kingdom InfraRed Telescope Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) as a cool white dwarf with kinematics and age compatible with the thick-disk/halo ...

    • Brown dwarf census with the Dark Energy Survey year 3 data and the thin disc scale height of early L types 

      Rosell, A. Carnero; Santiago, B.; Ponte, M. dal; Burningham, B.; Costa, L. N. da; Marshall, J. L.; McMahon, R. G.; Bechtol, K.; Paris, L. De; Li, T.; Pieres, A.; Abbott, T. M. C.; Annis, J.; Avila, S.; Bernstein, G. M.; Burke, D. L.; Carrasco-Kind, M.; Carretero, J.; Vicente, J. De; Drlica-Wagner, A.; Fosalba, P.; Frieman, J.; Garcia-Bellido, J.; Gaztanaga, E.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hollowood, D. L.; Maia, M. A. G.; Menanteau, F.; Miquel, R.; Plazas, A. A.; Roodman, A.; Sanchez, E.; Scarpine, V.; Schindler, R.; Serrano, S.; Sevilla-Noarbe, I.; Sobreira, F.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Vikram, V.; Walker, A. R. (2019-09-05)
      In this paper we present a catalogue of 11 745 brown dwarfs with spectral types ranging from L0 to T9, photometrically classified using data from the Dark Energy Survey (DES) year 3 release matched to the Vista Hemisphere ...

    • Brown dwarf companions to white dwarfs 

      Burleigh, Matt R.; Steele, Paul R.; Dobbie, Paul D.; Farihi, Jay; Napiwotzki, Ralf; Maxted, Pierre F. L.; Barstow, Martin A.; Jameson, Richard F.; Casewell, Sarah L.; Gaensicke, Boris T.; Marsh, Tom R. (American Institute of Physics (AIP), 2011)
      Brown dwarf companions to white dwarfs are rare, but recent infra-red surveys are slowly revealing examples. We present new observations of the post-common envelope binary WD0137-349, which reveals the effects of irradiation ...

    • Brown Dwarfs and low-mass stars in the Pleiades and Praesepe: membership and binarity 

      Pinfield, D.J.; Dobbie, P.D.; Jameson, R.F.; Steele, I.A.; Jones, H.R.A.; Katsiyannis, A. C. (2003)
      We present near infrared J-, H- and K-band photometry and optical spectroscopy of low-mass star and brown dwarf (BD) candidates in the Pleiades and Praesepe open clusters. We flag non-members from their position in K, I-K ...

    • BST1047+1156: A (Failing) Ultradiffuse Tidal Dwarf in the Leo I Group 

      Mihos, J. Christopher; Durrell, Patrick R.; Watkins, Aaron E.; McGaugh, Stacy S.; Feldmeier, John (2024-03-15)
      We use deep Hubble Space Telescope imaging to study the resolved stellar populations in BST1047+1156, a gas-rich, ultradiffuse dwarf galaxy found in the intragroup environment of the Leo I galaxy group. While our imaging ...

    • Burst and persistent emission properties during the recent active episode of the anomalous x-ray pulsar 1E 1841-045 

      Lin, Lin; Kouveliotou, Chryssa; Gogus, Ersin; van der Horst, Alexander J.; Watts, Anna L.; Baring, Matthew G.; Kaneko, Yuki; Wijers, Ralph A. M. J.; Woods, Peter M.; Barthelmy, Scott; Burgess, James Michael; Chaplin, Vandiver; Gehrels, Neil; Goldstein, Adam; Granot, Jonathan; Guiriec, Sylvain; Mcenery, Julie; Preece, Robert D.; Tierney, David; van der Klis, Michiel; von Kienlin, Andreas; Zhang, Shuang Nan (2011-10-10)
      The Swift/Burst Alert Telescope detected the first burst from 1E 1841-045 in 2010 May with intermittent burst activity recorded through at least 2011 July. Here we present Swift and Fermi/Gamma-ray Burst Monitor observations ...

    • Butterfly star in Taurus: Structures of young stellar objects 

      Lucas, P.W.; Roche, P.F. (1997-04-21)
      We present high-resolution, near-infrared images of a sample of five low-mass young stellar objects in the Taurus-Auriga dark cloud, mostly observed with the 'shift and add' technique, together with deep polarimetric images. ...

    • [C I](1–0) and [C I](2–1) in Resolved Local Galaxies 

      Crocker, Alison F.; Eric, Pellegrini; Smith, J.-D. T.; Draine, B.~T.; Wilson, C. D.; Wolfire, M. G.; Armus, Lee; Brinks, Elias; Dale, D.~A.; Groves, Brent; Herrera-Camus, Rodrigo; Hunt, L.~K.; Kennicutt, Robert C.; Murphy, E. J.; Sandstrom, Karin; Schinnerer, Eva; Rigopoulou, Dimitra; Rosolowsky, Erik; van der Werf, Paul (2019-12-10)
      We present resolved [C I] line intensities of 18 nearby galaxies observed with the SPIRE FTS spectrometer on the Herschel Space Observatory. We use these data along with resolved CO line intensities from J_up = 1 to 7 to ...

    • Calculation of the Astrophysical S-Factor and Reaction-Rate for L-8(ALPHA,N0)B-11 

      Rauscher, T.; Krauss, H.; Grun, K.; Oberhummer, H. (ADAM HILGER LTD, 1992)

    • Calculation of the He-3(He-3, 2p)He-4 AND H-3(H-3, 2N)He-4 astrophysical S-factor at low energies 

      Winkler, S.; Krauss, H.; Grun, K.; Rauscher, T.; Oberhummer, H.; Abele, H.; Staudt, G. (1992-08)
      We have calculated the cross sections for the charge symmetric reactions He-3(He-3,2p)He-4 and He-3(He-3,2p)He-4 at sub-Coulomb energies in the potential model. Good agreement with the experimental data is obtained. The ...

    • Calculations of fission rates for r-process nucleosynthesis 

      Panov, I.; Kolbe, E.; Pfeiffer, B.; Rauscher, T.; Kratz, K.L.; Thielemann, Friedrich-Karl (2005-01-24)
      Fission plays an important role in the r-process which is responsible; not only for the yields of transuranium isotopes, but may have a strong influence on the formation of the majority of heavy nuclei due to fission ...

    • Calculations of nuclear reactions of astrophysical interest involving unstable nuclei 

      Oberhummer, H.; Balogh, W.; Bieber, R.; Herndl, H.; Langer, U.; Rauscher, T.; Beer, H. (Editions Frontieres, 1995)

    • Calculations of periodicity from Halpha profiles of Proxima Centauri 

      Collins, John; Jones, Hugh; Barnes, John (2017-06-07)
      We investigate retrieval of the stellar rotation signal for Proxima Centauri. We make use of high-resolution spectra taken with UVES and HARPS of Proxima Centauri over a 13-yr period as well as photometric observations of ...

    • Calibrated and completeness-corrected optical stellar density maps of the Northern Galactic Plane 

      Farnhill, H. J.; Drew, J. E.; Barentsen, G.; González-Solares, E. A. (2016-03-21)
      Following on from the second release of calibrated photometry from IPHAS, the INT/WFC Photometric Hα Survey of the Northern Galactic Plane, we present incompleteness-corrected stellar density maps in the r and i photometric ...

    • Calibrating the relation of low-frequency radio continuum to star formation rate at 1 kpc scale with LOFAR 

      Heesen, V.; E., Buie II; Huff, C. J.; Perez, L. A.; Woolsey, J. G.; Rafferty, D. A.; Basu, A.; Beck, R.; Brinks, E.; Horellou, C.; Scannapieco, E.; Brüggen, M.; Dettmar, R. -J.; Sendlinger, K.; Nikiel-Wroczyński, B.; Chyży, K. T.; Best, P.N.; Heald, George H.; Paladino, R. (2018-10-15)
      Radio continuum (RC) emission in galaxies allows us to measure star formation rates (SFRs) unaffected by extinction due to dust, of which the low-frequency part is uncontaminated from thermal (free-free) emission. We ...

    • Can massive stars form in low mass clouds? 

      Smith, Jamie D.; Jaffa, Sarah E.; Krause, Martin G. H. (2023-09-07)
      The conditions required for massive star formation are debated, particularly whether massive stars must form in conjunction with massive clusters. Some authors have advanced the view that stars of any mass (below the total ...