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The Morphological Diversity of DIG in Halos of Edge-on Spirals as Revealed by HST/ACS

Published online by Cambridge University Press:  17 September 2012

J. Rossa ,
M. Dahlem ,
R.-J. Dettmar  and
R.P. van der Marel
J. Rossa
Affiliation:
Department of Astronomy, University of Florida, 211 Bryant Space Science Center, PO Box 112055, Gainesville, FL 32611, USA. e-mail: jrossa@astro.ufl.edu;
M. Dahlem
Affiliation:
CSIRO/ATNF - Paul Wild Observatory , Locked Bag 194, Narrabri, NSW 2390, Australia
R.-J. Dettmar
Affiliation:
Astronomisches Institut, Ruhr-Universität Bochum, Universitätsstrasse 150/NA7, 44780 Bochum, Germany
R.P. van der Marel
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
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Abstract

We present new results on extraplanar DIG (eDIG), based on high spatial resolution narrowband imaging observations of four late-type, actively star-forming edge-on spirals, obtained with ACS on-board HST. Our Hα observations reveal a multitude of structures on both small and large scales. Whereas all four galaxies have been studied with ground-based telescopes before, here the small scale structure of the extended emission line gas is presented for the very first time at a spatial resolution of 0.05′′, corresponding to 5 pc at the mean distance to our galaxies. The eDIG morphology is very different for all four targets, as a result of their different star formation activity and galaxy mass. There is a very smooth DIG morphology observed in two of the galaxies (NGC 4634 and NGC 5775), whereas the other two (NGC 4700 and NGC 7090) show a much more complex morphology with intricate filaments, and bubbles and supershells. We find that the morphology of the eDIG, in particular the break-up of diffuse emission into filaments in galaxy halos, shows a strong dependence on the level of star formation activity per unit area, and eDIG can be arranged into a morphological sequence.

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. 221 - 224
Copyright
© EAS, EDP Sciences, 2012

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References

Bregman, J.N., 1980, ApJ, 236, 577CrossRef
Dahlem, M., Lisenfeld, U., & Golla, G., 1995, ApJ, 444, 119CrossRef
Dahlem, M., Lisenfeld, U., & Rossa, J., 2006, A&A, 457, 121
Dahlem, M., Lazendic, J.S., Haynes, R.F., Ehle, M., & Lisenfeld, U., 2001, A&A, 374, 42
de Avillez, M.A., 2000, MNRAS, 315, 479CrossRef
Dettmar, R.-J., 1990, A&A, 232, L15
Haffner, L.M., Reynolds, R.J., Tufte, S.L., et al., 2003, ApJS, 149, 405CrossRef
Hoopes, C.G., Walterbos, R.A.M., & Rand, R.J., 1999, ApJ, 522, 669CrossRef
Howk, J.C., & Savage, B.D. 1999, AJ, 117, 2077CrossRef
Hummel, E., Beck, R., & Dettmar, R.-J., 1991, A&AS, 87, 309PubMed
McClure-Griffiths, N.M., Dickey, J.M., Gaensler, B.M., & Green, A.J., 2003, ApJ, 594, 833CrossRef
Miller, S.T., & Veilleux, S., 2003, ApJS, 148, 383CrossRef
Norman, C.A., & Ikeuchi, S., 1989, ApJ, 345, 372CrossRef
Normandeau, M., Taylor, A.R., & Dewdney, P.E., 1996, Nature, 380, 687CrossRef
Rand, R.J., 1996, ApJ, 462, 712CrossRef
Reynolds, R.J., 1984, ApJ, 282, 191CrossRef
Rossa, J., & Dettmar, R.-J., 2000, A&A, 359, 433
Rossa, J., & Dettmar, R.-J., 2003a, A&A, 406, 493
Rossa, J., & Dettmar, R.-J., 2003b, A&A, 406, 505
Rossa, J., Dettmar, R.-J., Walterbos, R.A.M., & Norman, C.A., 2004, AJ, 128, 674CrossRef
Rossa, J., Dahlem, M., Dettmar, R.-J., & van der Marel, R.P., 2009, AJ, in press [arXiv:0804.3819]
Shapiro, P.R., & Field, G.B., 1976, ApJ, 205, 762CrossRef
Tüllmann, R., Pietsch, W., Rossa, J., Breitschwerdt, D., & Dettmar, R.-J., 2006, A&A, 448, 43
Veilleux, S., Cecil, G., & Bland-Hawthorn, J., 2005, ARA&A, 43, 769CrossRef