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

6 Scopus citations

Abstract

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
Volume660
Issue number1 II
DOIs
StatePublished - May 1 2007

Keywords

  • 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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