- Conference date: 19-22 March, 2007
- Location: Gaithersburg, Maryland (USA)
I will present some of the ways that x‐ray spectroscopy can be utilized to determine cosmological parameters focusing on 5 methods : the gas fraction in clusters, the use of the Sunyaev‐Zeldovich effect, the detection of resonance scattering in clusters, the use of resonance absorption and emission in background sources and the growth of structure. All of these techniques except the S‐Z effect rely heavily on high resolution x‐ray spectroscopy and require the next generation of x‐ray spectroscopic missions such as Constellation‐X. The promise of these techniques is great and they have the potential for precision cosmology with errors similar to those of other precision techniques such as type Ia supernova. If time permits I will also talk about how we can learn about how active galaxies strongly influence the growth of cosmic structure and how broad band high resolution x‐ray spectra are necessary to measure the effects of AGN and how much energy they input into the universe and the role of new atomic physics calculations in interpreting these results. A related discussion can be found in a previously published manuscript.
- Absorption spectroscopy
- Active galaxies
- High resolution spectroscopy
- Astronomical spectroscopy
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