scholarly journals A Survey of Spectral Features in ISO SWS Spectra of AGNs

1997 ◽  
Vol 159 ◽  
pp. 337-338
Author(s):  
E. Sturm ◽  
D. Lutz ◽  
R. Genzel
Keyword(s):  
Infrared Spectroscopy ◽  
Spectral Range ◽  
Galactic Nuclei ◽  
Spectral Features ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Central Program ◽  
Ultraluminous Infrared Galaxy ◽  
Ultraluminous Infrared Galaxies

Various AGNs, starburst galaxies, and ultraluminous infrared galaxies (ULIRGs) are observed as part of the ISO-SWS central program of mid-infrared spectroscopy on bright galactic nuclei. Prototypical template sources are scanned over the full spectral range of SWS (2.5–45µm) in order to get a complete census of spectral features in this wavelength domain. As an example we present the spectrum of the Seyfert 2 galaxy Circinus. The application of results from this survey to the study of the nature and evolution of other galaxies can be demonstrated by an analysis of the ultraluminous infrared galaxy Arp 220.

scholarly journals High‐Resolution Mid‐Infrared Spectroscopy of Ultraluminous Infrared Galaxies

2007 ◽  
Vol 667 (1) ◽  
pp. 149-169 ◽  
Author(s):  
D. Farrah ◽  
J. Bernard‐Salas ◽  
H. W. W. Spoon ◽  
B. T. Soifer ◽  
L. Armus ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Ultraluminous Infrared Galaxies

scholarly journals ULTRA-DEEP MID-INFRARED SPECTROSCOPY OF LUMINOUS INFRARED GALAXIES ATz∼ 1 ANDz∼ 2

2010 ◽  
Vol 719 (1) ◽  
pp. 425-450 ◽  
Author(s):  
Dario Fadda ◽  
Lin Yan ◽  
Guilaine Lagache ◽  
Anna Sajina ◽  
Dieter Lutz ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Luminous Infrared Galaxies

scholarly journals MID-INFRARED SPECTROSCOPY OF CANDIDATE ACTIVE GALACTIC NUCLEI-DOMINATED SUBMILLIMETER GALAXIES

2010 ◽  
Vol 713 (1) ◽  
pp. 503-519 ◽  
Author(s):  
K. Coppin ◽  
A. Pope ◽  
K. Menéndez-Delmestre ◽  
D. M. Alexander ◽  
J. S. Dunlop ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Submillimeter Galaxies

scholarly journals Comprehensive Broadband X-Ray and Multiwavelength Study of Active Galactic Nuclei in 57 Local Luminous and Ultraluminous Infrared Galaxies Observed with NuSTAR and/or Swift/BAT

2021 ◽  
Vol 257 (2) ◽  
pp. 61
Author(s):  
Satoshi Yamada ◽  
Yoshihiro Ueda ◽  
Atsushi Tanimoto ◽  
Masatoshi Imanishi ◽  
Yoshiki Toba ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Infrared Galaxies ◽  
Telescope Array ◽  
X Ray ◽  
Bolometric Luminosity ◽  
Small Column ◽  
Ultraluminous Infrared Galaxy ◽  
Ultraluminous Infrared Galaxies ◽  
Infrared Data

Abstract We perform a systematic X-ray spectroscopic analysis of 57 local luminous and ultraluminous infrared galaxy systems (containing 84 individual galaxies) observed with the Nuclear Spectroscopic Telescope Array and/or Swift/BAT. Combining soft X-ray data obtained with Chandra, XMM-Newton, Suzaku, and/or Swift/XRT, we identify 40 hard (>10 keV) X-ray–detected active galactic nuclei (AGNs) and constrain their torus parameters with the X-ray clumpy torus model XCLUMPY. Among the AGNs at z < 0.03, for which sample biases are minimized, the fraction of Compton-thick (N H ≥ 1024 cm−2) AGNs reaches 64 − 15 + 14 % (6/9 sources) in late mergers, while it is 24 − 10 + 12 % (3/14 sources) in early mergers, consistent with the tendency reported by Ricci et al. We find that the bolometric AGN luminosities derived from the infrared data increase but the X-ray to bolometric luminosity ratios decrease with merger stage. The X-ray-weak AGNs in late mergers ubiquitously show massive outflows at subparsec to kiloparsec scales. Among them, the most luminous AGNs (L bol,AGN ∼ 1046 erg s−1) have relatively small column densities of ≲1023 cm−2 and almost super-Eddington ratios (λ Edd ∼ 1.0). Their torus covering factors (C T (22) ∼ 0.6) are larger than those of Swift/BAT-selected AGNs with similarly high Eddington ratios. These results suggest a scenario where, in the final stage of mergers, multiphase strong outflows are produced due to chaotic quasi-spherical inflows, and the AGN becomes extremely X-ray weak and deeply buried due to obscuration by inflowing and/or outflowing material.

Determination of main raw material source in bar soaps using mid-infrared spectroscopy combined with classification tools

2021 ◽  
Vol 164 ◽  
pp. 106029
Author(s):  
Diego Maciel Gerônimo ◽  
Sheila Catarina de Oliveira ◽  
Frederico Luis Felipe Soares ◽  
Patricio Peralta-Zamora ◽  
Noemi Nagata
Keyword(s):  
Infrared Spectroscopy ◽  
Raw Material ◽  
Material Source ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy

scholarly journals Mid-infrared spectroscopy of earthworm bodies to investigate their species belonging and their relationship with the soil they inhabit

2021 ◽  
Vol 162 ◽  
pp. 103894
Author(s):  
Thao Pham ◽  
Cornelia Rumpel ◽  
Yvan Capowiez ◽  
Pascal Jouquet ◽  
Céline Pelosi ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy

scholarly journals Rapid tannin profiling of tree fodders using untargeted mid-infrared spectroscopy and partial least squares regression

Plant Methods ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Jordi Ortuño ◽  
Sokratis Stergiadis ◽  
Anastasios Koidis ◽  
Jo Smith ◽  
Chris Humphrey ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Least Squares ◽  
Partial Least Squares ◽  
Partial Least Squares Regression ◽  
Multivariate Calibration ◽  
Plant Ecology ◽  
Coefficient Of Determination ◽  
Least Squares Regression ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy

Abstract Background The presence of condensed tannins (CT) in tree fodders entails a series of productive, health and ecological benefits for ruminant nutrition. Current wet analytical methods employed for full CT characterisation are time and resource-consuming, thus limiting its applicability for silvopastoral systems. The development of quick, safe and robust analytical techniques to monitor CT’s full profile is crucial to suitably understand CT variability and biological activity, which would help to develop efficient evidence-based decision-making to maximise CT-derived benefits. The present study investigates the suitability of Fourier-transformed mid-infrared spectroscopy (MIR: 4000–550 cm−1) combined with multivariate analysis to determine CT concentration and structure (mean degree of polymerization—mDP, procyanidins:prodelphidins ratio—PC:PD and cis:trans ratio) in oak, field maple and goat willow foliage, using HCl:Butanol:Acetone:Iron (HBAI) and thiolysis-HPLC as reference methods. Results The MIR spectra obtained were explored firstly using Principal Component Analysis, whereas multivariate calibration models were developed based on partial least-squares regression. MIR showed an excellent prediction capacity for the determination of PC:PD [coefficient of determination for prediction (R2P) = 0.96; ratio of prediction to deviation (RPD) = 5.26, range error ratio (RER) = 14.1] and cis:trans ratio (R2P = 0.95; RPD = 4.24; RER = 13.3); modest for CT quantification (HBAI: R2P = 0.92; RPD = 3.71; RER = 13.1; Thiolysis: R2P = 0.88; RPD = 2.80; RER = 11.5); and weak for mDP (R2P = 0.66; RPD = 1.86; RER = 7.16). Conclusions MIR combined with chemometrics allowed to characterize the full CT profile of tree foliage rapidly, which would help to assess better plant ecology variability and to improve the nutritional management of ruminant livestock.

At-line mid infrared spectroscopy for monitoring downstream processing unit operations

2015 ◽  
Vol 50 (6) ◽  
pp. 997-1005 ◽  
Author(s):  
Florian Capito ◽  
Romas Skudas ◽  
Harald Kolmar ◽  
Christian Hunzinger
Keyword(s):  
Infrared Spectroscopy ◽  
Downstream Processing ◽  
Processing Unit ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Unit Operations
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