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Metallicity Gradients and Gas Flows in Galaxy Pairs

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arxiv 1008.2204 v1 pith:3B44LQIL submitted 2010-08-12 astro-ph.CO

Lisa J. Kewley (1) , David Rupke (1) , H. Jabran Zahid (1) , Margaret J. Geller (2) , Elizabeth J. Barton (3) ((1) University of Hawaii , (2) Smithsonian Astrophysical Observatory , (3) University of California , Irvine) This is my paper · ORCID
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keywords gradientsmetallicitygalaxiespairsclosegalaxyfirstisolated
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We present the first systematic investigation into the metallicity gradients in galaxy close pairs. We determine the metallicity gradients for 8 galaxies in close pairs using HII region metallicities obtained with high signal-to-noise multi-slit observations with the Keck LRIS Spectrograph. We show that the metallicity gradients in close pairs are significantly shallower than gradients in isolated spiral galaxies such as the Milky Way, M83, and M101. These observations provide the first solid evidence that metallicity gradients in interacting galaxies are systematically different from metallicity gradients in isolated spiral galaxies. Our results suggest that there is a strong relationship between metallicity gradients and the gas dynamics in galaxy interactions and mergers.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 242 citations worldwide. Full citation record

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    A new grid of photoionization models calibrates UV, optical, and IR line ratios to ISM pressure and electron density, revealing strong metallicity and ionization-zone effects on traditional density diagnostics.

  3. When Jets Don't Quench: Near-Infrared H$_{2}$ in Star Forming Low-Excitation Radio Galaxies

    astro-ph.GA 2026-06 unverdicted novelty 5.0 of 10

    New Gemini/GNIRS observations of star-forming radio galaxies show warm H2 emission driven primarily by mergers rather than jets.

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