Results 51 to 60 of about 5,377 (132)

X-rays from the environment of supermassive black holes in active galaxies [PDF]

, 2001
X-rays are a powerful probe of the physical conditions in the nuclei of active galaxies. We review the X-ray properties of radio-quiet AGN, LINERs and ultraluminous IR galaxies based on observations carried out with the X-ray satellite ROSAT.
Komossa, Stefanie
core   +3 more sources

H_2 emission arises outside photodissociation regions in ultra-luminous infrared galaxies

, 2010
Ultra-luminous infrared galaxies are among the most luminous objects in the local universe and are thought to be powered by intense star formation. It has been shown that in these objects the rotational spectral lines of molecular hydrogen observed at ...
A Monreal-Ibero, D-C Kim, DA Forbes, DB Sanders, DJ Hollenbach, E Egami, F Kemper, GH Rieke, H Roussel, HWW Spoon, JC Weingartner, JDT Smith, JE Chiar, JR Houck, L Hao, LJ Allamandola, M Imanishi, Nadia L. Zakamska, NL Zakamska, P Guillard, P Ogle, PA Gerakines, PN Appleton, PP van der Werf, PP van der Werf, R Genzel, RC Kennicutt, SJU Higdon, TH Greif, Y Shi   +29 more
core   +1 more source

Warm molecular hydrogen in outflows from Ultraluminous Infrared Galaxies [PDF]

, 2014
Ultraluminous infrared galaxies (ULIRGs) show on average three times more emission in the rotational transitions of molecular hydrogen than expected based on their star formation rates. Using Spitzer archival data we investigate the origin of excess warm
Hill, Matthew J., Zakamska, Nadia L.
core   +1 more source

Low Accretion Rates in Black Holes in Late-stage Merger Ultraluminous Infrared Galaxies

The Astrophysical Journal
We explore the accretion rates of supermassive black holes (SMBHs) in late-stage galaxy mergers by observing three ultraluminous infrared galaxies (ULIRGs), IRAS 14378-3651, IRAS 17208-0014 and IRAS 23365+3604, using the JWST/MIRI Medium Resolution ...
George H. Rieke, Victorine A. Buiten, Charles E. Goldberg, Jane Morrison, Paul van der Werf, Almudena Alonso-Herrero, Stacey Alberts, Nina Bonaventura, Zhiyuan Ji, Jianwei Lyu, P. Rinaldi, Meredith A. Stone, Yang Sun, Yongda Zhu   +13 more
doaj   +1 more source

Core Revelations: The Star Formation and Active Galactic Nucleus Connection at the Heart of NGC 7469

The Astrophysical Journal
We investigate the star formation–active galactic nucleus (AGN) connection in the Seyfert 1 NGC 7469 using James Webb Space Telescope mid-infrared spectroscopic integral field unit (IFU) data.
Léa M. Feuillet, Steve Kraemer, Marcio B. Meléndez, Travis C. Fischer, Henrique R. Schmitt, James N. Reeves, Anna Trindade Falcão   +6 more
doaj   +1 more source

Optical and Near-Infrared Imaging of the IRAS 1-Jy Sample of Ultraluminous Infrared Galaxies: II. The Analysis

, 2002
The present paper discusses the results from an analysis of the images presented in Paper I (astro-ph/0207373) supplemented with new spectroscopic data obtained at Keck.
Arribas S., Bender R., Clements D. L., D. B. Sanders, D.‐C. Kim, Glazebrook K., Jedrzejewski R., Kawara K., Lawrence A., Leech K. J., Lilly S. J., Matsuhara H., Melnick J., Mobasher B., Puget J. L., S. Veilleux, Sanders D. B., Taylor G. L., Zheng Z., Zou Z., Zucca E.   +20 more
core   +1 more source

The Rest-frame Submillimeter Spectrum of High-redshift, Dusty, Star-forming Galaxies from the SPT-SZ Survey

The Astrophysical Journal, 2023
We present the average rest-frame spectrum of the final catalog of dusty star-forming galaxies (DSFGs) selected from the South Pole Telescope's SPT-SZ survey and measured with Band 3 of the Atacama Large Millimeter/submillimeter Array.
C. Reuter, J. S. Spilker, J. D. Vieira, D. P. Marrone, A. Weiss, M. Aravena, M. A. Archipley, S. C. Chapman, A. Gonzalez, T. R. Greve, C. C. Hayward, R. Hill, S. Jarugula, S. Kim, M. Malkan, K. A. Phadke, A. A. Stark, N. Sulzenauer, D. Vizgan   +18 more
doaj   +1 more source

The differential magnification of high-redshift ultraluminous infrared galaxies [PDF]

, 1998
A class of extremely luminous high-redshift galaxies has recently been detected in unbiased submillimetre-wave surveys using the Submillimetre Common-User Bolometer Array (SCUBA) camera at the James Clerk Maxwell Telescope.
Blain, Andrew W.
core   +5 more sources

Search for tidal dwarf galaxy candidates in a sample of ultraluminous infrared galaxies [PDF]

Astronomy & Astrophysics, 2007
(ABRIDGED) Star-forming small galaxies made out of collisional debris have been found in a variety of merging systems. So far only a few of them are known in ULIRGs although they show clear signs of interactions. Whether external star formation may take place in such objects is an open question. The aim of this paper is to identify and characterise the
Monreal-Ibero, Ana, Colina, Luis, Arribas-Mocoroa, Santiago, García-Marín, Macarena   +3 more
openaire   +3 more sources

Infrared emission from z ∼ 6.5 quasar host galaxies: a direct estimate of dust physical properties

Astronomy & Astrophysics
Quasars at the dawn of cosmic time (z > 6) are fundamental probes for investigating the early coevolution of supermassive black holes and their host galaxy.
Costa M., Decarli R., Pozzi F., Cox P., Meyer R. A., Pensabene A., Venemans B. P., Walter F., Xu F.   +8 more
doaj   +1 more source