OH and H I absorption at the nucleus of NGC 660

Willem A. Baan, James Rhoads, Aubrey D. Haschick

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


High-resolution interferometric data of the H I and OH absorption in the nuclear region of NGC 660 reveal three distinct absorbing structures. The central disk of the galaxy with a large velocity gradient dominates the absorption signature. The gas in the warped outer disk appears in absorption close to the systemic velocity; the outer rings of the warp located at large radii are moving in front of the nuclear radio source. Third, an outflowing feature can be seen at the center of the radio source at 100 km s-1 below the systemic velocity. This mostly molecular feature could be due to a perturbed spiral structure in the inner regions of the disk.

Original languageEnglish (US)
Pages (from-to)508-515
Number of pages8
JournalAstrophysical Journal
Issue number2
StatePublished - Dec 20 1992


  • Galaxies: individual (NGC 660)
  • Galaxies: interstellar matter
  • Galaxies: nuclei
  • Molecular data

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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