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Feedback at high redshift

Published online by Cambridge University Press:  17 August 2009

Alice E. Shapley
Affiliation:
Department of Astronomy, 601 Campbell Hall, UC Berkeley, Berkeley, CA, 94720, USA
Mario Livio
Affiliation:
Space Telescope Science Institute, Baltimore
Stefano Casertano
Affiliation:
Space Telescope Science Institute, Baltimore
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Summary

We examine the process of feedback in star-forming galaxies at 2 ≤ z ≤ 3. Large-scale outflows of interstellar material are observed in starburst galaxies in the nearby universe, and have long been invoked as a means to address important shortcomings in current models of galaxy formation. At z ∼ 3, superwinds appear to be a generic feature of color-selected star-forming galaxies with spectroscopic information, and may explain both the apparent lack of neutral hydrogen near star-forming galaxies, and also the strong cross-correlation between galaxies and CIV metalabsorption systems. Another type of star-formation feedback is the leakage of hydrogen-ionizing radiation from galaxies, which may also have a profound effect on the physical state of the intergalactic medium (IGM), especially as the number density of QSOs drops off at z > 2.5. Between z = 3 and z = 2, there is strong evolution in the number density of HI absorption systems in the Lyα forest. Therefore, it is also of interest to trace how the effect of galactic superwinds on the IGM evolves from z = 3 to z = 2. We show preliminary results that many properties of superwinds are similar in star-forming galaxies at z ∼ 2, and direct evidence that enriched gas reaches radii of at least ∼100 kpc. Finally, we discuss future directions for the study of outflows in the high-redshift universe. Specifically, we highlight the unique combination of existing deep HST/ACS imaging in the GOODS-N field with high signal-to-noise rest-frame UV spectra. Using the morphological information provided by the HST/ACS will enable us to probe a complementary, spatial dimension of feedback at high redshift, which has been unexplored until now.

Type
Chapter
Information
Planets to Cosmology
Essential Science in the Final Years of the Hubble Space Telescope: Proceedings of the Space Telescope Science Institute Symposium, Held in Baltimore, Maryland May 3–6, 2004
, pp. 99 - 110
Publisher: Cambridge University Press
Print publication year: 2006

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  • Feedback at high redshift
    • By Alice E. Shapley, Department of Astronomy, 601 Campbell Hall, UC Berkeley, Berkeley, CA, 94720, USA
  • Edited by Mario Livio, Space Telescope Science Institute, Baltimore, Stefano Casertano, Space Telescope Science Institute, Baltimore
  • Book: Planets to Cosmology
  • Online publication: 17 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536328.010
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  • Feedback at high redshift
    • By Alice E. Shapley, Department of Astronomy, 601 Campbell Hall, UC Berkeley, Berkeley, CA, 94720, USA
  • Edited by Mario Livio, Space Telescope Science Institute, Baltimore, Stefano Casertano, Space Telescope Science Institute, Baltimore
  • Book: Planets to Cosmology
  • Online publication: 17 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536328.010
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Feedback at high redshift
    • By Alice E. Shapley, Department of Astronomy, 601 Campbell Hall, UC Berkeley, Berkeley, CA, 94720, USA
  • Edited by Mario Livio, Space Telescope Science Institute, Baltimore, Stefano Casertano, Space Telescope Science Institute, Baltimore
  • Book: Planets to Cosmology
  • Online publication: 17 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536328.010
Available formats
×