Results 61 to 70 of about 30,280 (240)

Hidden Giants in JWST's PEARLS: An Ultramassive z = 4.26 Submillimeter Galaxy that Is Invisible to HST

open access: yesThe Astrophysical Journal, 2023
We present a multiwavelength analysis using the Submillimeter Array (SMA), James Clerk Maxwell Telescope, NOEMA, JWST, the Hubble Space Telescope (HST), and the Spitzer Space Telescope of two dusty strongly star-forming galaxies, 850.1 and 850.2, seen ...
Ian Smail   +34 more
doaj   +1 more source

Dynamical properties of Ultraluminous Infrared Galaxies. II. Traces of dynamical evolution and end products of local ultraluminous mergers [PDF]

open access: yes, 2006
We present results from our Very Large Telescope large program to study the dynamical evolution of local Ultraluminous Infrared Galaxies (ULIRGs) and QSOs.
A. Burkert   +18 more
core   +3 more sources

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

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

A Practical Guide to the Massive Black Hole Cosmic History

open access: yesAdvances in Astronomy, Volume 2012, Issue 1, 2012., 2012
I review our current understanding of massive black hole (MBH) formation and evolution along the cosmic history. After a brief introductory overview of the relevance of MBHs in the hierarchical structure formation paradigm, I discuss the main viable channels for seed BH formation at high redshift and for their subsequent mass growth and spin evolution.
A. Sesana, Francesco Shankar
wiley   +1 more source

ISO Spectroscopy of Ultraluminous Infrared Galaxies

open access: yesAstrophysics and Space Science, 1999
Spectroscopy from the Infrared Space Observatory ISO has for the first timeprovided the sensitivity to exploit the diagnostic power ofmid-infrared fine structure lines and PAH features for the study ofultraluminous infrared galaxies (LIR >1012 L ⊙). We report on observations obtainedwith SWS, ISOPHOT-S, and the CVF option of ISOCAM.
Lutz, D   +7 more
openaire   +1 more source

Star Formation History of Dwarf Galaxies in Cosmological Hydrodynamic Simulations

open access: yesAdvances in Astronomy, Volume 2010, Issue 1, 2010., 2010
We examine the past and current work on the star formation (SF) histories of dwarf galaxies in cosmological hydrodynamic simulations. The results obtained from different numerical methods are still somewhat mixed, but the differences are understandable if we consider the numerical and resolution effects.
Kentaro Nagamine, Andrey V. Kravtsov
wiley   +1 more source

ALMA Multiple-transition Observations of High-density Molecular Tracers in Ultraluminous Infrared Galaxies [PDF]

open access: yes, 2018
We present the results of our ALMA observations of 11 (ultra)luminous infrared galaxies ((U)LIRGs) at J = 4–3 of HCN, HCO+, and HNC and J = 3–2 of HNC.
M. Imanishi, K. Nakanishi, T. Izumi
semanticscholar   +1 more source

Deep Observations of CO and Free–Free Emission in Ultraluminous Infrared QSO IRAS F07599+6508 [PDF]

open access: yesAstrophysical Journal, 2021
Infrared quasi-stellar objects (IR QSOs) are a rare subpopulation selected from ultraluminous infrared galaxies (ULIRGs) and have been regarded as promising candidates of ULIRG-to-optical QSO transition objects.
Q. Tan   +6 more
semanticscholar   +1 more source

Hard X-Ray to Radio Multiwavelength SED Analysis of Local U/LIRGs in the GOALS Sample with a Self-consistent AGN Model including a Polar-dust Component

open access: yesThe Astrophysical Journal Supplement Series, 2023
We conduct hard X-ray to radio multiwavelength spectral energy distribution (SED) decomposition for 57 local luminous and ultraluminous infrared galaxies observed with the Nuclear Spectroscopic Telescope Array and/or Swift/Burst Alert Telescope in the ...
Satoshi Yamada   +9 more
doaj   +1 more source

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