Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited

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We present neutral hydrogen, ultraviolet, optical and near-infrared imaging, as well as optical spectroscopic observations of Minkowski's Object (MO), a star forming system at the end of a radio jet associated with NGC541 at the center of a cluster of galaxies, Abell 194. The observations strengthen the evidence, first presented in 1985, that MO is a small, peculiar galaxy in which the star formation has been triggered by the radio jet. Key new results are the discovery of a double H I cloud with a mass of 4.9 x 10{sup 8} M{sub {circle_dot}} straddling the radio jet downstream from MO ... continued below

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PDF-file: 43 pages; size: 1.2 Mbytes

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Croft, S; van Breugel, W; de Vries, W; Dopita, M; Martin, C; Morganti, R et al. February 7, 2006.

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We present neutral hydrogen, ultraviolet, optical and near-infrared imaging, as well as optical spectroscopic observations of Minkowski's Object (MO), a star forming system at the end of a radio jet associated with NGC541 at the center of a cluster of galaxies, Abell 194. The observations strengthen the evidence, first presented in 1985, that MO is a small, peculiar galaxy in which the star formation has been triggered by the radio jet. Key new results are the discovery of a double H I cloud with a mass of 4.9 x 10{sup 8} M{sub {circle_dot}} straddling the radio jet downstream from MO at the location where the jet changes direction and decollimates; a strong detection of MO at near- and far-UV wavelengths and in H{alpha}, both of which also show a double structure; and what appear to be numerous H II regions and associated clusters in MO. The UV morphology of MO along the radio jet resembles the radio-aligned, rest-frame UV morphologies seen in many high redshift radio galaxies, which are also thought to be caused by jet-induced star formation. The UV, optical, and near-IR data show that the stellar population is dominated by a 7.5Myr-old instantaneous burst, with a total stellar mass of 1.9 x 10{sup 7} M{sub {circle_dot}}.

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PDF-file: 43 pages; size: 1.2 Mbytes

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  • Journal Name: Astrophysical Journal, vol. 647, N/A, August 20, 2006, pp. 1040

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  • Report No.: UCRL-JRNL-219648
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 899106
  • Archival Resource Key: ark:/67531/metadc881089

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 7, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 29, 2016, 8:11 p.m.

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Croft, S; van Breugel, W; de Vries, W; Dopita, M; Martin, C; Morganti, R et al. Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited, article, February 7, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc881089/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.