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AGN FEEDBACK IN TWO INTERESTING GROUPS

AGN FEEDBACK IN TWO INTERESTING GROUPS. F. Gastaldello (IASF-MI, UCI) D. Buote (UCI), P. Humphrey (UCI), W. Mathews (UCSC), F. Brighenti (U. Bologna), P. Temi (AMES), S. Molendi (IASF-MI), S. Ettori (INAF-Bologna). AWM 4: corona in a relaxed object

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AGN FEEDBACK IN TWO INTERESTING GROUPS

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  1. AGN FEEDBACK IN TWO INTERESTING GROUPS F. Gastaldello (IASF-MI, UCI) D. Buote (UCI), P. Humphrey (UCI), W. Mathews (UCSC), F. Brighenti (U. Bologna), P. Temi (AMES), S. Molendi (IASF-MI), S. Ettori (INAF-Bologna)

  2. AWM 4: corona in a relaxed object • NGC 5044: cavities, filaments and cold fronts in the Perseus of groups OUTLINE

  3. AWM4 AND AGN FEEDBACK Gastaldello+08, see also O’Sullivan+05, Giacintucci+08

  4. AWM4 AND AGN FEEDBACK It’s also a fossil system (Zibetti+08) Gastaldello+09

  5. AWM4 AND AGN FEEDBACK Inspired by Donahue+05

  6. AWM4 AND AGN FEEDBACK

  7. NCC AWM4 AND AGN FEEDBACK CC Bauer+05 CC De Grandi & Molendi 01 NCC

  8. AWM4 AND AGN FEEDBACK Sun+09 Gastaldello+08

  9. AWM4 AND AGN FEEDBACK Cavagnolo+08

  10. NGC 5044 Gastaldello+09 (using J. Sanders’ binning code) See also results from longer Chandra observation (David+09)

  11. NGC 5044 Gastaldello+09

  12. NGC 5044 CAON ET AL. 2000 Gastaldello+09

  13. DUST IN NGC 5044 8-4.5 µm PAH TEMI, BRIGHENTI & MATHEWS 2007

  14. NGC 5044 BLACK : X-ray FILAMENT box #2 RED: X-ray FILAMENT box #7 Gastaldello+09

  15. NGC 5044 Gastaldello+09

  16. Corona in a central BCG of a relaxed object: what are the implications for the AGN feedback loop ? • Why is it so different from other objects able to preserve the temperature gradient ? Are there others ? • Cavities close to the nucleus but not filled by 1.4 GHz emission in some groups (also NGC 4325): is that strange ? • Sloshing seems to be a rather common feature, we are starting to see that also in groups (NGC 5098, aka RGH 80, Randall+09). What are the implications (see Markevitch’s talk) ? • What if dust just aids to cool X-ray emitting gas to form warm Hα emitting gas ? SUMMARY

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