scholarly journals HEAVILY OBSCURED ACTIVE GALACTIC NUCLEI IN HIGH-REDSHIFT LUMINOUS INFRARED GALAXIES

2010 ◽  
Vol 722 (2) ◽  
pp. L238-L243 ◽  
Author(s):  
Ezequiel Treister ◽  
C. Megan Urry ◽  
Kevin Schawinski ◽  
Carolin N. Cardamone ◽  
David B. Sanders
Keyword(s):  
Active Galactic Nuclei ◽  
High Redshift ◽  
Galactic Nuclei ◽  
Infrared Galaxies ◽  
Luminous Infrared Galaxies

scholarly journals AGN and Megamasers

2012 ◽  
Vol 8 (S287) ◽  
pp. 323-332 ◽  
Author(s):  
Andrea Tarchi
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Water Molecules ◽  
Host Galaxies ◽  
Infrared Galaxies ◽  
Luminous Infrared Galaxies ◽  
Radio Jets ◽  
Nuclear Regions ◽  
Maser Sources ◽  
Intense Star Formation

AbstractLuminous extragalactic masers are traditionally referred to as the ‘megamasers’. Those produced by water molecules are associated with accretion disks, radio jets, or outflows in the nuclear regions of active galactic nuclei (AGN). The majority of OH maser sources are instead driven by intense star formation in ultra-luminous infrared galaxies, although in a few cases the OH maser emission traces rotating (toroidal or disk) structures around the nuclear engines of AGN. Thus, detailed maser studies provide a fundamental contribution to our knowledge of the main nuclear components of AGN, constitute unique tools to measure geometric distances of host galaxies, and have a great impact on probing the, so far, paradigmatic Unified Model of AGN.

scholarly journals Infrared to Millimeter Spectroscopy and Imaging of Active Galactic Nuclei

1997 ◽  
Vol 159 ◽  
pp. 312-324
Author(s):  
R. Genzel ◽  
D. Lutz ◽  
E. Sturm ◽  
L. Tacconi ◽  
N. Thatte ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Near Infrared ◽  
Galactic Nuclei ◽  
Emission Lines ◽  
Wavelength Band ◽  
Infrared Galaxies ◽  
Physical Processes ◽  
Luminous Infrared Galaxies ◽  
Ngc 1068 ◽  
Millimeter Spectroscopy

AbstractObservations in the 1 µm to 1 cm wavelength band give important information on the physical processes occurring in and immediately around active galactic nuclei. Concentrating on recent results on ionic, atomic, and molecular emission lines, we discuss as examples the first ISO results on the nature of ultra-luminous infrared galaxies, and near-infrared and millimeter measurements of the central 100 parsecs of the Seyfert 2 galaxy NGC 1068.

Obscured Active Galactic Nuclei in Luminous Infrared Galaxies

1996 ◽  
Vol 470 ◽  
pp. 222 ◽  
Author(s):  
L. M. Shier ◽  
M. J. Rieke ◽  
G. H. Rieke
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Infrared Galaxies ◽  
Luminous Infrared Galaxies

scholarly journals Nature of Compton-thick Active Galactic Nuclei in “Nonmerging” Luminous Infrared Galaxies UGC 2608 and NGC 5135 Revealed with Broadband X-Ray Spectroscopy

2020 ◽  
Vol 897 (1) ◽  
pp. 107
Author(s):  
Satoshi Yamada ◽  
Yoshihiro Ueda ◽  
Atsushi Tanimoto ◽  
Saeko Oda ◽  
Masatoshi Imanishi ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Infrared Galaxies ◽  
X Ray ◽  
Luminous Infrared Galaxies

scholarly journals Spectroscopy of Luminous Infrared Galaxies

1999 ◽  
Vol 186 ◽  
pp. 295-301
Author(s):  
S. Veilleux
Keyword(s):  
Energy Source ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Starburst Galaxies ◽  
Infrared Galaxies ◽  
Luminous Infrared Galaxies ◽  
Main Emphasis ◽  
Infrared Spectroscopic ◽  
Evolutionary Phase

A review of recent optical and infrared spectroscopic results on luminous infrared galaxies is presented. The main emphasis is on the ultraluminous objects. Possible correlations with infrared luminosity are identified. These results are used to constrain the nature of the dominant energy source in luminous infrared galaxies, and to test whether these objects may represent an evolutionary phase between starburst galaxies and active galactic nuclei.

The Active Galactic Nuclei Contribution to the Mid‐Infrared Emission of Luminous Infrared Galaxies

2006 ◽  
Vol 644 (1) ◽  
pp. 143-147 ◽  
Author(s):  
K. Brand ◽  
A. Dey ◽  
D. Weedman ◽  
V. Desai ◽  
E. Le Floc’h ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Infrared Emission ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Luminous Infrared Galaxies

scholarly journals Constraints on the production and escape of ionizing radiation from the emission-lines of metal-poor star-forming galaxies

2019 ◽  
Vol 15 (S352) ◽  
pp. 121-122
Author(s):  
A. Plat ◽  
S. Charlot ◽  
G. Bruzual ◽  
A. Feltre ◽  
A. Vidal-Garca ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Emission Line ◽  
Active Galactic Nuclei ◽  
High Redshift ◽  
Galactic Nuclei ◽  
Emission Lines ◽  
High Redshift Galaxies ◽  
Star Forming ◽  
Radiative Shocks ◽  
Metal Poor Star

AbstractTo understand how the nature of the ionizing sources and the leakage of ionizing photons in high-redshift galaxies can be constrained from their emission-line spectra, we compare emission-line models of star-forming galaxies including leakage of ionizing radiation, active galactic nuclei (AGN) and radiative shocks, with observations of galaxies at various redshifts with properties expected to approach those of primeval galaxies.

SpitzerObservations of Optically “Invisible” Radio and X‐Ray Sources: High‐Redshift Active Galactic Nuclei

2005 ◽  
Vol 626 (1) ◽  
pp. 58-69 ◽  
Author(s):  
J. L. Higdon ◽  
S. J. U. Higdon ◽  
D. W. Weedman ◽  
J. R. Houck ◽  
E. Le Floc’h ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
High Redshift ◽  
Galactic Nuclei ◽  
X Ray
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