Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-12T08:39:45.507Z Has data issue: false hasContentIssue false
  • English
  • Français

Polar Ring Galaxies and the Tully-Fisher relation: implications for the dark halo shape

Published online by Cambridge University Press:  26 May 2016

Magda Arnaboldi ,
Enrica Iodice ,
Frederick Bournaud ,
Francoise Combes ,
Linda S. Sparke ,
Wim Van Driel  and
Massimo Capaccioli
Magda Arnaboldi
Affiliation:
INAF, Astronomical Observatory of Turin, Italy
Enrica Iodice
Affiliation:
INAF, Astronomical Observatory of Capodimonte, Italy
Frederick Bournaud
Affiliation:
LERMA, Observatory of Paris, France
Francoise Combes
Affiliation:
LERMA, Observatory of Paris, France
Linda S. Sparke
Affiliation:
Dept. of Astronomy, University of Wisconsin, USA
Wim Van Driel
Affiliation:
GEPI, Observatory of Paris, France
Massimo Capaccioli
Affiliation:
INAF, Observatory of Capodimonte, Italy

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We have investigated the Tully-Fisher relation for Polar Ring Galaxies (PRGs), based on near infrared, optical and Hi data available for a sample of these peculiar objects. The total K-band luminosity, which mainly comes from the central host galaxy, and the measured Hi linewidth at 20% of the peak line flux density, which traces the potential in the polar plane, place most polar rings of the sample far from the Tully-Fisher relation defined for spiral galaxies, with many PRGs showing larger Hi line-widths than expected for the observed K band luminosity. This result is confirmed by a larger sample of objects, based on B-band data. This observational evidence may be related to the dark halo shape and orientation in these systems, which we study by numerical modeling of PRG formation and dynamics: the larger rotation velocities observed in PRGs can be explained by a flattened polar halo, aligned with the polar ring.

Type
Part 12: Dark and Visible Matter Scaling Relations
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 405 - 410
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Arnaboldi, M., et al. 1995, Planet. Space Sci., 43, 1377.Google Scholar
Arnaboldi, M., et al. 1997, AJ, 113, 585.Google Scholar
Bekki, K. 1998, ApJ, 499, 635.CrossRefGoogle Scholar
Bournaud, F. & Combes, F. 2003, A&A, 401, 817.Google Scholar
Bullock, J. S., et al. 2001, MNRAS, 321, 559.Google Scholar
Chung, A., et al. 2002, AJ, 123, 2387.Google Scholar
Combes, F. 2003, New Astron. Reviews, 46, 755.CrossRefGoogle Scholar
de Jong, R. S. 1996, A&A, 313, 377.Google Scholar
Gallagher, J. S., et al. 2002, ApJ, 568, 199.Google Scholar
Gerhard, O. & Vietri, M. 1986, MNRAS, 223, 377.Google Scholar
Gerhard, O., et al. 2001, AJ, 121, 1936.Google Scholar
Giovanelli, R., et al. 1997, AJ, 113, 22.Google Scholar
Iodice, E., et al. 2002a, AJ, 123, 195.Google Scholar
Iodice, E., et al. 2002b, A&A, 391, 103.Google Scholar
Iodice, E., et al. 2002c, A&A, 391, 117.Google Scholar
Iodice, E., et al. 2003, ApJ, 585, 730.Google Scholar
Mathieu, A., Merrifield, M.R. & Kuijken, K. 2002, MNRAS, 330, 251.Google Scholar
Matthews, L.D., van Driel, W. & Gallagher, J.S. 1998a, AJ, 116, 1169.CrossRefGoogle Scholar
Matthews, L.D., van Driel, W. & Gallagher, J.S. 1998b, AJ, 116, 2196.Google Scholar
McGaugh, S. S., et al. 2000, ApJ, 533, 99.Google Scholar
Navarro, J.F., Frenk, C.S. & White, S.D. 1996, ApJ, 462, 563.Google Scholar
Navarro, J.F., Frenk, C.S. & White, S.D. 1997, ApJ, 490, 493.CrossRefGoogle Scholar
Reshetnikov, V. & Sotnikova, N. 1997, A&A, 325, 933.Google Scholar
Richter, O.-G., Sackett, P. D. & Sparke, L. S. 1994, AJ, 107, 99.Google Scholar
Schechter, P.L., et al. 1984, MNRAS, 210, 497.Google Scholar
Tully, R. B. & Fisher, J. R. 1977, A&A, 54, 661.Google Scholar
van Driel, W., et al. 2000, A&A, 141, 385.Google Scholar
van Driel, W., et al. 2002, A&A, 386, 140.Google Scholar
van Driel, W., et al. 2003, A&A, in prep.Google Scholar
van Gorkom, J. H., Schechter, P. L. & Kristian, J. 1987, ApJ, 314, 457.Google Scholar
Verheijen, M. A. 2001, ApJ, 563, 694.Google Scholar
Whitmore, B. C., Lucas, R. A. & McElroy, D. B. 1990, AJ, 100, 1489 (PRGC).Google Scholar