AEGIS: Galaxy spectral energy distributions from the X-ray to radio

N. P. Konidaris, P. Guhathakurta, K. Bundy, A. L. Coil, C. J. Conselice, M. C. Cooper, P. R.M. Eisenhardt, J. S. Huang, R. J. Ivison, S. A. Kassin, E. N. Kirby, J. M. Lotz, J. A. Newman, K. G. Noeske, R. M. Rich, T. A. Small, C. N.A. Willmer, S. P. Willner

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The All-Wavelength Extended Groth Strip International Survey (AEGIS) team presents broadband spectral energy distributions (SEDs), from X-ray to radio wavelengths, for 71 galaxies spanning the redshift range 0.55-1.16 (〈z〉 ∼ 0.7). Galaxies with secure redshifts are selected from a small (22 arcmin2) subsection of the Keck/ DEIMOS Galaxy Redshift Survey in the Extended Groth Strip field that has also been targeted for deep panchromatic imaging by ultraviolet (120-250 nm), optical (360-900 nm), optical/near-infrared (440-1600 nm), near-infrared (1200-2200 nm), mid/far-infrared (3.6-70 μm), and radio (6-20 cm). A typical galaxy in our sample is MB = -19.82. The ultraviolet to mid-infrared portion of their SEDs are found to be bracketed by two stellaronly model SEDs: (1) an early burst followed by passive evolution and (2) a constant star formation rate since early times. This suggests that few of these galaxies are undergoing major starbursts. Approximately half the galaxies show a mid- to far-infrared excess relative to the model SEDs, consistent with thermal emission from interstellar dust. Two objects have power-law SEDs, indicating that they are dominated by active galactic nuclei; both are detected in X-rays. SEDs, from the ultraviolet to the infrared, follow expected trends: redder SEDs are associated with red U - B, early-type morphology, and low [O II] emission, and vice versa for blue SEDs.

Original languageEnglish (US)
Pages (from-to)L7-L10
JournalAstrophysical Journal
Issue number1 II
StatePublished - May 1 2007


  • Galaxies: evolution
  • Galaxies: general
  • Infrared: galaxies
  • Radio continuum: galaxies
  • Ultraviolet: galaxies
  • X-rays: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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