1 / 16

High Resolution Spectroscopy of Cooling Flows: Current Data and Future Prospects

High Resolution Spectroscopy of Cooling Flows: Current Data and Future Prospects. Brian McNamara, John Houck, Claude Canizares, John Davis, Dan Dewey, Larry David, Paul Nulsen, Craig Sarazin, Liz Blanton, Steve Murray, Laura Birzan-Rafferty, David Rafferty, Mangala Sharma. Michael Wise (MIT).

carol
Download Presentation

High Resolution Spectroscopy of Cooling Flows: Current Data and Future Prospects

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. High Resolution Spectroscopy of CoolingFlows: Current Data and Future Prospects Brian McNamara, John Houck, Claude Canizares, John Davis, Dan Dewey, Larry David, Paul Nulsen, Craig Sarazin, Liz Blanton, Steve Murray, Laura Birzan-Rafferty, David Rafferty, Mangala Sharma Michael Wise (MIT)

  2. Outline • Grating observations of clusters • Technical aspects • Observational complications • Interpreting grating observations • Current limits • Implications • Future prospects • Con-X

  3. 2 ~ 1 for all Importance of Spectral Resolution

  4. Observing Clusters with Gratings Identify orders Define extraction region Extract spectrum

  5. Complications for Clusters • Reduced spectral resolution • Complicated wavelength scale • Background estimation difficult • Advanced modeling required

  6. Spatial information possible, but expensive Chandra HETG/LETG Fe XVII : Wise et al. (2003)

  7. XMM RGS Peterson et al. (2003)

  8. RGS limits on Cooling Rates Fe XVII : Peterson et al. (2003)

  9. What limit is interesting? Abell 1068 Star Formation Rate Wise, McNamara, Murray (2003)

  10. Temperature map Absorbing column Wise et al. (2003) H T ~ 0.8 keV Cold Gas M87

  11. Something is either reducing the cooling, or absorbing the emission at low T Sampling the EM distribution Peterson et al. (2003)

  12. Additional physics? • Conduction • Central radio source • Supernovae (Type I and II) • Star formation • Dynamical interactions • Intrinsic absorption Star formation

  13. Constellation X

  14. A1835 Con-X Calorimeter 50 ksec

  15. 1000 / 9 Cooling rate limits 200 / 3 40 / 1

  16. Summary • Cooling flows live! • Derived cooling rates are down • Limits not yet restrictive • Imaging clearly shows cool gas • Non-isobaric cooling? • Data imply departures from simple isobaric case • Physical mechanism(s) unclear • Need to measure individual line fluxes • Future Observations • Deeper observations • Con-X

More Related