NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-19 T20:37:54 PDT
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For refcode 2001AJ....122.2993S:
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2001AJ....122.2993S A MULTIWAVELENGTH STUDY OF STEPHAN'S QUINTET JACK W. SULENTIC Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487 MARGARITA ROSADO AND DEBORAH DULTZIN-HACYAN Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 70-264, 04510 Mexico D. F., Mexico LOURDES VERDES-MONTENEGRO Instituto de Astrofisica de Andalucia, Apdo. Postal 3004, E-18080 Granada, Spain GINEVRA TRINCHIERI Osservatorio Astronomico di Brera, via Brera 28, I-20121 Milano, Italy CONG XU IPAC, California Institute of Technology, 7700 South Wilson Avenue, Pasadena, CA 91125 AND WOLFGANG PIETSCH Max-Planck-Institut fur Extraterrestrische Physik, Postfach 1312, D-85741 Garching, Germany Received 2001 July 2; accepted 2001 September 20 ABSTRACT Stephan's Quintet (SQ) is a compact group that we find in an atypical moment when a high-velocity intruder is passing through it. The intrusion is particularly interesting because a previous intruder had stripped most of the gas from the group members. This debris field was shocked in the ongoing collision with the new intruder. This evolutionary history agrees well with observations and explains how a strongly interacting system can show low levels of star formation. We present new multiwavelength data including previously unpublished ROSAT X-ray, H{alpha} interference filter/Fabry-Perot, ISO MIR/FIR, and radio line and continuum images. These observations and previously published data provide new insights, as well as support for some previous hypotheses. (1) Fabry-Perot and H I velocities allow us to unambiguously distinguish between gas associated with SQ and the new intruder. (2) Most detected emission regions are found in the remnant interstellar medium (ISM) of the new intruder, which allows us to infer its size and present physical state. (3) The few emission regions associated with the stripped ISM of SQ include the best candidate tidal dwarf galaxy. (4) Multiwavelength data suggest that strong MIR/FIR emission from the Seyfert 2 nucleus of NGC 7319 comes from dust heated directly by a power-law continuum rather than a starburst. (5) The correspondence between extended X-ray/radio continuum/forbidden optical emission confirms the existence of a large scale shock in SQ. (6) We confirm the presence of two stripped spiral members in the process of transformation into E/S0 morphology. Finally (7) observations are consistent with the idea that the collision in SQ is ongoing with possible detection of H II region ablation and Rayleigh-Taylor instabilities. Key words: galaxies: interactions - galaxies: kinematics and dynamics - galaxies: structure - galaxies: Seyfert - intergalactic medium
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