Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-26T04:02:51.107Z Has data issue: false hasContentIssue false
  • English
  • Français

A Spiral-Like Disk of Ionized Gas in IC 1459: Signature of a Merging Collision?

Published online by Cambridge University Press:  12 April 2016

Paul Goudfrooij ,
H.U. Nørgaard-Nielsen ,
H.E. Jørgensen ,
L. Hansen  and
T. de Jong
Paul Goudfrooij
Affiliation:
Astronomical Institute “Anton Pannekoek”, University of Amsterdam, Roetersstraat 15, 1018 WB Amsterdam, The Netherlands
H.U. Nørgaard-Nielsen
Affiliation:
Danish Space Research Institute, Gl. Lundtoftevej 15, 2800 Lyngby, Denmark
H.E. Jørgensen
Affiliation:
Copenhagen University Observatory, Øster Voldgade 3, 1350 København K, Denmark
L. Hansen
Affiliation:
Copenhagen University Observatory, Øster Voldgade 3, 1350 København K, Denmark
T. de Jong
Affiliation:
Astronomical Institute “Anton Pannekoek”, University of Amsterdam, Roetersstraat 15, 1018 WB Amsterdam, The Netherlands

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 report the discovery of a large (15 kpc diameter) Hα+[NII] emission-line disk in the elliptical galaxy IC 1459, showing weak spiral structure. The line flux peaks strongly at the nucleus and is more concentrated than the stellar continuum. The major axis of the disk of ionized gas coincides with that of the stellar body of the galaxy. The mass of the ionized gas is estimated to be ~ 1 105 M⊙, less than 1% of the total mass of gas present in IC 1459. The total gas mass of 4 107 M⊙ has been estimated from the dust mass derived from a broad-band colour index image and the IRAS data. We speculate that the presence of dust and gas in IC 1459 is a signature of a merger event.

Type
III. Observations of Related Objects
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 215 - 219
Copyright
Copyright © NASA 1990

References

Bohlin, R.C., Savage, B.D., Drake, J.F.: 1978, Ap. J. 224, 132 Google Scholar
Canizares, C.R., Fabbiano, G., Trinchieri, G.: 1987, Ap. J. 312, 503 Google Scholar
Disney, M.J. and Wall, J.V.: 1977, Mon. Not. R. Astron. Soc. 179, 235 Google Scholar
Forman, W., Jones, C., Tucker, W.: 1985, Ap. J. 203, 102 CrossRefGoogle Scholar
Franx, M. and Illingworth, G.D.: 1988, Ap. J. Lett. 327, L55 Google Scholar
Goudfrooij, P., Nørgaard-Nielsen, H.U., Hansen, L., Jørgensen, H.E., de Jong, T.: 1990, Astron. Ap. (Lett.), in pressGoogle Scholar
de Grijp, M.H.K., Miley, G.K., Lub, J., de Jong, T.: 1985, Nature 314, 240.Google Scholar
de Grijp, M.H.K. and Goudfrooij, P.: 1990, in preparation.Google Scholar
Huchra, J. and Geller, M.: 1982, Ap. J. 257, 432 Google Scholar
de Jong, T., Nørgaard-Nielsen, H.U., Hansen, L., Jorgensen, H.E.: 1990, Astron. Ap., in pressGoogle Scholar
Jura, M., Kim, D.W., Knapp, G.R., Guthathakurta, P.: 1987, Ap. J. Lett. 312, L11 Google Scholar
Knapp, G.R., Turner, EX., Cunniffe, P.E.: 1985, A. J. 90, 454 Google Scholar
Kurucz, R.L.: 1979, Ap. J. Suppl. 40, 1 Google Scholar
Phillips, M.M., Jenkins, C.R., Dopita, M.A., Sadler, E.M., Binette, L.: 1986, A. J. 91, 1062 Google Scholar
Sadler, E.M., Jenkins, C.R., Kotanyi, C.G.: 1989, Mon. Not. R. Astron. Soc, in pressGoogle Scholar
Sandage, A. and Tammann, G.A.: 1981, A Revised Shapley-Ames Catalog of Bright Galaxies, Carnegie Institution of Washington. (RSA)Google Scholar
Sparks, W.B., Wall, J.V., Thome, D.J., Jorden, P.R., van Breda, I.G., Rudd, P.J., Jørgensen, H.E.: 1985, Mon. Not. R. Astron. Soc. 217, 87 Google Scholar
Sparks, W.B., Macchetto, F., Golombek, D.: 1989, Ap. J. 345, 153 Google Scholar
Tohline, J.E., Simonson, G.F., Caldwell, N.: 1982, Ap. J. 252, 92 Google Scholar
Véron-Cetty, M.P. and Veron, P.: 1988, Astron. Ap. 204, 28 Google Scholar