scholarly journals The Far‐Infrared Spectral Energy Distributions of X‐Ray–selected Active Galaxies

2003 ◽  
Vol 590 (1) ◽  
pp. 128-148 ◽  
Author(s):  
Joanna K. Kuraszkiewicz ◽  
Belinda J. Wilkes ◽  
Eric ◽  
J. Hooper ◽  
Kim K. McLeod ◽  
...  
Keyword(s):  
Far Infrared ◽  
Active Galaxies ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
X Ray ◽  
Infrared Spectral

scholarly journals WELL-SAMPLED FAR-INFRARED SPECTRAL ENERGY DISTRIBUTIONS OFz∼ 2 GALAXIES: EVIDENCE FOR SCALED UP COOL GALAXIES

2010 ◽  
Vol 725 (1) ◽  
pp. 742-749 ◽  
Author(s):  
Adam Muzzin ◽  
Pieter van Dokkum ◽  
Mariska Kriek ◽  
Ivo Labbé ◽  
Iara Cury ◽  
...  
Keyword(s):  
Far Infrared ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Infrared Spectral

scholarly journals WHAT SHAPES THE FAR-INFRARED SPECTRAL ENERGY DISTRIBUTIONS OF GALAXIES?

2016 ◽  
Vol 818 (1) ◽  
pp. 62 ◽  
Author(s):  
Mohammadtaher Safarzadeh ◽  
Christopher C. Hayward ◽  
Henry C. Ferguson ◽  
Rachel S. Somerville
Keyword(s):  
Far Infrared ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Infrared Spectral

scholarly journals Multiwavelength Energy Distributions of Ultraluminous IRAS Galaxies

1994 ◽  
Vol 159 ◽  
pp. 332-332
Author(s):  
D. Rigopoulou ◽  
A. Lawrence
Keyword(s):  
Energy Source ◽  
Star Formation ◽  
Active Galaxies ◽  
Spectral Energy ◽  
Published Data ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Space Density ◽  
X Ray

Ultraluminous IRAS Galaxies (ULG's) have luminosities comparable to quasars while their space density is much higher than that of active galaxies. Much debate has centered around the origin of the energy source for these objects, whether this is a burst of star formation or a hidden quasar. The sample studied here is the Sanders et al. (1988) sample, 10 objects with LFIR ≥ 1012L⊙. We discuss our new observations at X-ray and submm wavelengths together with other published data for some of the objects. Some useful ideas can be gained from comparisons of the shape of the spectral energy distributions (SED's) of the ultraluminous objects with other “archetype” objects such as typical starbursts i.e. M82 or type 2 AGN i.e. NGC1068.

scholarly journals The spectral energy distributions of active galactic nuclei

2019 ◽  
Vol 489 (3) ◽  
pp. 3351-3367 ◽  
Author(s):  
M J I Brown ◽  
K J Duncan ◽  
H Landt ◽  
M Kirk ◽  
C Ricci ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Flux Density ◽  
Galactic Nuclei ◽  
Far Infrared ◽  
Power Laws ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Photometric Redshifts ◽  
X Ray

ABSTRACT We present spectral energy distributions (SEDs) of 41 active galactic nuclei, derived from multiwavelength photometry and archival spectroscopy. All of the SEDs span at least 0.09 to 30 $\mu$m, but in some instances wavelength coverage extends into the X-ray, far-infrared, and radio. For some active galactic nuclei (AGNs) we have fitted the measured far-infrared photometry with greybody models, while radio flux density measurements have been approximated by power laws or polynomials. We have been able to fill some of the gaps in the spectral coverage using interpolation or extrapolation of simple models. In addition to the 41 individual AGN SEDs, we have produced 72 Seyfert SEDs by mixing SEDs of the central regions of Seyferts with galaxy SEDs. Relative to the literature, our templates have broader wavelength coverage and/or higher spectral resolution. We have tested the utility of our SEDs by using them to generate photometric redshifts for 0 < z ≤ 6.12 AGNs in the Boötes field (selected with X-ray, IR, and optical criteria) and, relative to SEDs from the literature, they produce comparable or better photometric redshifts with reduced flux density residuals.

scholarly journals Feedback‐driven Evolution of the Far‐Infrared Spectral Energy Distributions of Luminous and Ultraluminous Infrared Galaxies

2007 ◽  
Vol 658 (2) ◽  
pp. 840-850 ◽  
Author(s):  
Sukanya Chakrabarti ◽  
T. J. Cox ◽  
Lars Hernquist ◽  
Philip F. Hopkins ◽  
Brant Robertson ◽  
...  
Keyword(s):  
Far Infrared ◽  
Spectral Energy ◽  
Infrared Galaxies ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Ultraluminous Infrared Galaxies ◽  
Infrared Spectral

scholarly journals Emission Lines and the Spectral Energy Distributions of Quasars

1997 ◽  
Vol 159 ◽  
pp. 126-129 ◽  
Author(s):  
B.J. Wilkes ◽  
P.J. Green ◽  
S. Mathur ◽  
J.C. McDowell
Keyword(s):  
Spectral Energy Distribution ◽  
Far Infrared ◽  
Active Galaxies ◽  
Emission Lines ◽  
Spectral Energy ◽  
Baldwin Effect ◽  
Energy Distributions ◽  
X Ray ◽  
The Baldwin Effect ◽  
Initial Results

AbstractMany years of study have failed to establish conclusively relationships between a quasar’s spectral energy distribution (SED) and the emission lines it is thought to produce. This is at least partially due to the lack of well-observed SEDs. We present initial results from a line–SED study for a sample of 43 quasars and active galaxies for which we have optical and ultraviolet spectra and far-infrared–X-ray SEDs. We present the results of tests for correlations between line equivalent widths and SED luminosity and slope parameters and compare these results to those from earlier studies. We find that the Baldwin effect is weaker when the luminosity is defined close to the ionizing continuum of that line and conclude that the detailed SED is likely to be important in making further progress.

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