Results 31 to 40 of about 5,389 (174)

Ultraluminous Infrared Galaxies: QSOs in Formation? [PDF]

open access: yesThe Astrophysical Journal, 2002
accepted to be published in ApJ, 7 ...
Tacconi, L.   +6 more
openaire   +3 more sources

A Diverse Population of z ∼ 2 ULIRGs Revealed by JWST Imaging

open access: yesThe Astrophysical Journal, 2023
Four ultraluminous infrared galaxies (ULIRGs) observed with JWST/NIRcam in the Cosmos Evolution Early Release Science program offer an unbiased preview of the z ∼ 2 ULIRG population.
J.-S. Huang   +14 more
doaj   +1 more source

Herschel views on ultra-luminous X-ray sources [PDF]

open access: yes, 2012
The nature of ultra-luminous X-ray sources (ULXs), which are off-nuclear extragalactic X-ray sources that exceed the Eddington luminosity for a stellar-mass black hole, is still largely unknown.
Chaty, Sylvain   +2 more
core   +2 more sources

Hidden Quasars in Ultraluminous Infrared Galaxies [PDF]

open access: yesSymposium - International Astronomical Union, 1999
Many ultraluminous infrared galaxies (ULIRGs) are powered by quasars hidden in the center, but many are also powered by starbursts. A simply diagnostic diagram is proposed that can identify obscured quasars in ULIRGs by their high-ionization emission lines ([O III]λ5007/Hβ ≳ 5), and “warm” IR color (f25/f60≳ 0.25).
Brotherton, M. S.   +3 more
openaire   +2 more sources

The Cosmic History of Black Hole Growth from Deep Multiwavelength Surveys

open access: yesAdvances in Astronomy, Volume 2012, Issue 1, 2012., 2012
Significant progress has been made in the last few years on understanding how supermassive black holes form and grow. In this paper, we begin by reviewing the spectral signatures of active galactic nuclei (AGN) ranging from radio to hard X‐ray wavelengths.
Ezequiel Treister   +2 more
wiley   +1 more source

Structural and Morphological Properties of Ultraluminous Infrared Galaxies at 1 < z < 3

open access: yesOpen Astronomy, 2015
Using the Hubble Space Telescope (HST)/Wide Field Camera 3 (WFC3) near-infrared high-resolution imaging from the 3D-HST survey, we analyze the morphology and structure of 502 ultraluminous infrared galaxies (ULIRGs; LIR > 1012L⊙) at 1 < z < 3. Their rest-
Fang Guanwen   +3 more
doaj   +1 more source

Resolved CO(1-0) Nuclei in IRAS 14348-1447: Evidence for Massive Bulge Progenitors to Ultraluminous Infrared Galaxies [PDF]

open access: yes, 1999
High-resolution, CO(1-0) interferometry of the ultraluminous infrared galaxy IRAS 14348-1447 is presented. The merger system has a molecular gas mass of \~3x10^10 solar masses and a projected nuclear separation of 4.8 kpc (3.5"), making it one of the ...
A. S. Evans   +4 more
core   +2 more sources

CO and Near-Infrared Observations of High-Redshift Submillimeter Galaxies [PDF]

open access: yes, 2000
I discuss our ongoing Owens Valley Millimeter Array observations and Keck near-infrared wavelength observations of the high-redshift sub-mm population of galaxies.
Frayer, D. T.
core   +2 more sources

FAR-INFRARED FINE-STRUCTURE LINE DIAGNOSTICS OF ULTRALUMINOUS INFRARED GALAXIES [PDF]

open access: yesThe Astrophysical Journal, 2013
We present Herschel observations of six fine-structure lines in 25 Ultraluminous Infrared Galaxies at z<0.27. The lines, [O III]52, [N III]57, [O I]63, [N II]122, [O I]145, and [C II]158, are mostly single gaussians with widths <600 km s-1 and luminosities of 10^7 - 10^9 Solar.
Farrah, D.   +18 more
openaire   +5 more sources

The Circumnuclear Environment of IRAS 20551‐4250: A Case Study of AGN/Starburst Connection for JWST

open access: yesAdvances in Astronomy, Volume 2012, Issue 1, 2012., 2012
We present a general review of the current knowledge of IRAS 20551‐4250 and its circumnuclear environment. This Ultraluminous Infrared Galaxy is one of the most puzzling sources of its class in the nearby Universe: the near‐IR spectrum is typical of a galaxy experiencing a very intense starburst, but a highly obscured active nucleus is identified ...
E. Sani, E. Nardini, Antonis Georgakakis
wiley   +1 more source

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