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Sökning: WFRF:(Hüttemeister S.)

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  • Jutte, E., et al. (författare)
  • The molecular gas content of the advanced S plus E merger NGC4441 Evidence for an extended decoupled nuclear disc?
  • 2010
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 509:1, s. A19-
  • Tidskriftsartikel (refereegranskat)abstract
    • Context. Despite their importance to galaxy evolution, mergers between a spiral and an elliptical (S+E mergers) have been poorly studied so far. NGC 4441 is a nearby candidate of an advanced remnant of such a merger, showing typical tidal structures such as an optical tail and two shells as well as two Hi tails. Aims. Studying the molecular gas content provides clues about the impact of a recent merger event on the star formation. Simulations of S+E mergers yield conflicting predictions about both the strength and the extent of an induced starburst. Thus, observations of the amount and the distribution of the molecular gas, the raw material of star formation, are needed to understand the influence of the merger on the star formation history. Methods. (CO)-C-12 and (CO)-C-13 (1-0) and (2-1) observations were obtained using the Onsala Space Observatory 20 m and IRAM 30 m telescope as well as the Plateau de Bure interferometer. These data allow us to carry out a basic analysis of the molecular gas properties, such as estimates of the molecular gas mass, temperature, and density and the star formation efficiency. Results. The CO observations detect an extended molecular gas reservoir out to similar to 4 kpc, with a total molecular gas mass of similar to 5 x 10(8) M-circle dot. Furthermore, high resolution imaging shows a central molecular gas feature, which is probably a rotating disc hosting most of the molecular gas (similar to 4 x 10(8) M-circle dot). This nuclear disc has a different sense of rotation to the large-scale Hi structure, indicating a kinematically decoupled core. We modeled the state of the interstellar medium with the radiative transfer code RADEX, using the ratios of the (CO)-C-12 to (CO)-C-13 line strenghts. The results are consistent with a diffuse (n
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  • Manthey, E., et al. (författare)
  • A Multi Wavelength Study of Moderate Luminosity Mergers
  • 2005
  • Ingår i: in Proceedings of “The Evolution of Starbursts”, Bad Honnef 16-20 August 2004, eds. S. Hüttemeister, E. Manthey, D. Bomans, K. Weis, AIP Conf. Proc. American Institute of Physics. - 0735402701 ; :783, s. pp. 343-348
  • Konferensbidrag (refereegranskat)
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  • Manthey, E., et al. (författare)
  • HI and CO in Moderate Luminosity Mergers
  • 2004
  • Ingår i: in Proceedings of "The Neutral ISM in Starburst Galaxies", Marstrand, June 2003, eds. Aalto S., Huettemeister S., Pedlar A., Astronomical Society of the Pacific Conf. Series, San Francisco. - 1583811826 ; , s. 107-108
  • Konferensbidrag (refereegranskat)
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  • Olsson, Evert, 1976, et al. (författare)
  • A Molecular Bar in the LINER NGC 5218
  • 2004
  • Ingår i: in Proceedings of "The Neutral ISM in Starburst Galaxies", Marstrand, June 2003, eds. Aalto S., Huettemeister S., Pedlar A., Astronomical Society of the Pacific Conf. Series, San Francisco. - 1583811826 ; , s. 162-166
  • Konferensbidrag (refereegranskat)
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  • Resultat 1-10 av 15

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