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

Abstract

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 stellarmore » mass of 1.9 x 10{sup 7} M{sub {circle_dot}}.« less

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
899106
Report Number(s):
UCRL-JRNL-219648
TRN: US200706%%492
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal, vol. 647, N/A, August 20, 2006, pp. 1040
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; CLOUDS; DETECTION; GALAXIES; HYDROGEN; MORPHOLOGY; RADIO GALAXIES; STARS; WAVELENGTHS

Citation Formats

Croft, S, van Breugel, W, de Vries, W, Dopita, M, Martin, C, Morganti, R, Neff, S, Oosterloo, T, Schiminovich, D, Stanford, S A, and van Gorkom, J. Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited. United States: N. p., 2006. Web. doi:10.1086/505526.
Croft, S, van Breugel, W, de Vries, W, Dopita, M, Martin, C, Morganti, R, Neff, S, Oosterloo, T, Schiminovich, D, Stanford, S A, & van Gorkom, J. Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited. United States. doi:10.1086/505526.
Croft, S, van Breugel, W, de Vries, W, Dopita, M, Martin, C, Morganti, R, Neff, S, Oosterloo, T, Schiminovich, D, Stanford, S A, and van Gorkom, J. Tue . "Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited". United States. doi:10.1086/505526. https://www.osti.gov/servlets/purl/899106.
@article{osti_899106,
title = {Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited},
author = {Croft, S and van Breugel, W and de Vries, W and Dopita, M and Martin, C and Morganti, R and Neff, S and Oosterloo, T and Schiminovich, D and Stanford, S A and van Gorkom, J},
abstractNote = {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}}.},
doi = {10.1086/505526},
journal = {Astrophysical Journal, vol. 647, N/A, August 20, 2006, pp. 1040},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 07 00:00:00 EST 2006},
month = {Tue Feb 07 00:00:00 EST 2006}
}