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Kinematics of Atomic Gas Halos in Edge-on Spirals

Published online by Cambridge University Press:  17 September 2012

R.J. Rand ,
R.A. Benjamin  and
M. Dahlem
R.J. Rand
Affiliation:
Department of Physics and Astronomy, University of New Mexico, 800 Yale Blvd, NE, Albuquerque, NM 87131, USA
R.A. Benjamin
Affiliation:
Department of Physics, University of Wisconsin-Whitewater, 800 West Main St., Whitewater, WI 53190, USA
M. Dahlem
Affiliation:
CSIRO/ATNF, Paul Wild Observatory, Narrabri, NSW 2390, Australia
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Abstract

We present new constraints on lagging atomic halos in the edge-ons NGC 4244 and NGC 4565 from recent WSRT data. In NGC 4244, any possible lag is limited to <10km s−1kpc−1 up to z = 2kpc, while NGC 4565 may have a lag of ∼10km s−1kpc−1, up to z = 2kpc, but only at about R ≤ 3′. These small lags in galaxies with little star formation may disagree with recently reported trends for extraplanar ionized gas in three edge-ons.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 56: The Role of the Disk-Halo Interaction in Galaxy Evolution: Outflow vs. Infall? , 2012 , pp. 247 - 250
Copyright
© EAS, EDP Sciences, 2012

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