Physical Conditions and Star Formation Activity in the Intragroup Medium of Stephan’s Quintet | Zendy

C. K. Xu | Zendy; N. Lu | Zendy; J. J. Condon | Zendy; M. A. Dopita | Zendy; R. J. Tuffs | Zendy

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

Author(s) -

C. K. Xu,

N. Lu,

J. J. Condon,

M. A. Dopita,

R. J. Tuffs

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/377445

Subject(s) - physics , astrophysics , spectral index , radio galaxy , ridge , spectral line , galaxy , excited state , line of sight , line (geometry) , star formation , astronomy , atomic physics , geometry , paleontology , mathematics , biology

New multi-band observations of the famous compact group of galaxies Stephan'sQuintet (SQ) are presented and analyzed. These include far infrared (FIR)images at 60$\mu m$ and 100$\mu m$ (ISOPHOT C-100 camera), radio continuumimages at 1.4 GHz (VLA B-array) and 4.86 GHz (VLA C-array), and long-slitoptical spectrographs (Palomar $200"$ telescope). With these new data, we aimto learn more about the X-ray/radio ridge in the middle of the intragroupmedium (IGM) and the IGM starburst SQ-A, both are likely to be caused by thehigh speed collision ($\sim 900$ km s$^{-1}$) between the intruder galaxy NGC7318b ($v = 5700$ km s$^{-1}$) and the IGM ($v = 6600$ km s$^{-1}$).

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