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A Molecular Ring in the Liner Ngc 5218

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Abstract

High resolution OVRO CO 1–0 observations of the inner 30″ in the LINER galaxy NGC 5218 reveal the presence of a double centrally peaked molecular concentration with extensions out to a radius of 12″. The molecular mass detected is 2.4 × 109 M⊙ and the gas surface density is high, ∼3000 M⊙ pc square in the inner 500 pc. The SFR is 2–3 M⊙ yr−1 and the SFE is ∼13, which are low or moderate values for that gas surface density. We interpret the inner feature as a rotating molecular ring with a radius of ∼ 200 pc. We furthermore suggest that the LINER activity in NGC 5218 is not caused by an aging starburst, but by a buried AGN.

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Authors and Affiliations

  1. Onsala Space Observatory & Jodrell Bank Observatory, Onsala, Sweden

    E. Olsson

  2. Onsala Space Observatory, Onsala, Sweden

    S. Aalto

  3. Astronomisches Institut der Universität Bochum, Germany

    S. HÜttemeister

Authors
  1. E. Olsson
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  2. S. Aalto
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  3. S. HÜttemeister
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Correspondence to E. Olsson.

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Olsson, E., Aalto, S. & HÜttemeister, S. A Molecular Ring in the Liner Ngc 5218. Astrophys Space Sci 295, 155–160 (2005). https://doi.org/10.1007/s10509-005-3677-y

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  • DOI: https://doi.org/10.1007/s10509-005-3677-y

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