Physical Conditions and Star Formation Activity in the Intragroup Medium of Stephan's Quintet

Details Physical Conditions and Star Formation Activity in the Intragroup Medium of Stephan's Quintet Physical Conditions and Star Formation Activity in the Intragroup Medium of Stephan's Quintet

2003-06-12

arxiv.org/abs/astro-ph/0306261v1

Astrophys.J.595:665-684,2003; Erratum-ibid.633:1201,2005

Astronomy and Astrophysics

Astrophysics

31 pages text, 17 figures. Accepted by ApJ. A PS file including all figures can be found in http://spider.ipac.caltech.edu/s

Scientific paper

10.1086/377445

New multi-band observations of the famous compact group of galaxies Stephan's Quintet (SQ) are presented and analyzed. These include far infrared (FIR) images at 60$\mu m$ and 100$\mu m$ (ISOPHOT C-100 camera), radio continuum images at 1.4 GHz (VLA B-array) and 4.86 GHz (VLA C-array), and long-slit optical spectrographs (Palomar $200"$ telescope). With these new data, we aim to learn more about the X-ray/radio ridge in the middle of the intragroup medium (IGM) and the IGM starburst SQ-A, both are likely to be caused by the high speed collision ($\sim 900$ km s$^{-1}$) between the intruder galaxy NGC 7318b ($v = 5700$ km s$^{-1}$) and the IGM ($v = 6600$ km s$^{-1}$).

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