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AEGIS: Galaxy Spectral Energy Distributions from the X-Ray to Radio

Konidaris, N. P. and Guhathakurta, P. and Bundy, K. and Coil, A. L. and Conselice, C. J. and Cooper, M. C. and Eisenhardt, P. R. M. and Huang, J.-S. and Ivison, R. J. and Kassin, S. A. and Kirby, E. N. and Lotz, J. M. and Newman, J. A. and Noeske, K. G. and Rich, R. M. and Small, T. A. and Willmer, C. N. A. and Willner, S. P. (2007) AEGIS: Galaxy Spectral Energy Distributions from the X-Ray to Radio. Astrophysical Journal Letters, 660 (1). L7-L10. ISSN 2041-8205. doi:10.1086/517929.

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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 arcmin^2) 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 M_B = -19.82. The ultraviolet to mid-infrared portion of their SEDs are found to be bracketed by two stellar-only 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Konidaris, N. P.0000-0003-1905-2815
Guhathakurta, P.0000-0001-8867-4234
Bundy, K.0000-0001-9742-3138
Conselice, C. J.0000-0003-1949-7638
Cooper, M. C.0000-0003-1371-6019
Ivison, R. J.0000-0001-5118-1313
Kirby, E. N.0000-0001-6196-5162
Lotz, J. M.0000-0003-3130-5643
Newman, J. A.0000-0001-8684-2222
Rich, R. M.0000-0003-0427-8387
Willner, S. P.0000-0002-9895-5758
Additional Information:© 2007 The American Astronomical Society. Received 2006 June 7; accepted 2006 September 15; published 2007 April 11. The authors wish to thank D. C. Koo for conceiving and helping with this Letter and the anonymous referee for valuable comments. N. P. K. and J. M. L. are supported by NASA grant HST-GO-10314.18-A. A. L. C. and J. A. N. are supported by NASA through Hubble Fellowship grants HF-01182.01-A and HF-01182.01-A. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.
Funding AgencyGrant Number
NASA Hubble FellowshipHF-01182.01-A
Subject Keywords:galaxies : evolution; galaxies : general; infrared : galaxies; radio continuum : galaxies; ultraviolet : galaxies; X-rays : galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20100318-100220460
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17770
Deposited By: Tony Diaz
Deposited On:21 Mar 2010 17:31
Last Modified:08 Nov 2021 23:38

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