Infrared Spectra of Cooling Flow Galaxies

Abstract

We have taken K-band spectra covering 7 cooling flow clusters. The spectra show many of the 1-0S transitions of molecular Hydrogen, as well as some of the higher vibrational transitions, and some lines of ionized Hydrogen. The line ratios allow us to conclude that the rotational states of the first excited vibrational state are in approximate LTE, so that densities above 10^5/ cm^3 are likely, but there is evidence that the higher vibrational states are not in LTE. The lack of pressure balance between the molecular gas and the ionized components emphasizes the need for dynamic models of the gas. The ratios of the ionized to molecular lines are relatively constant but lower than from starburst regions, indicating that alternative heating mechanisms are necessary.

arXiv comment6 pages, 3 figures

References in corpus (11)

• What Powers Ultra-luminous IRAS Galaxies?
• Structure of Stationary Photodissociation Fronts
• HST Observations of Vibrationally-Excited Molecular Hydrogen in Cluster Cooling Flow Nebulae
• A Near Infrared Spectroscopic Survey of LINER Galaxies
• The Ratio of Ortho- to Para-H2 in Photodissociation Regions
• A Deep Look at the Emission-Line Nebula in Abell 2597
• The Nature of LINERs
• Molecular Gas and Star Formation in the Host Galaxy of the QSO I Zw 1
• Molecular Hydrogen and Paschen-alpha Emission in Cooling Flow Galaxies
• Near-Infrared Spectra of Ultraluminous Infrared Galaxies
• Molecular hydrogen emission in Cygnus A

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