ALMA 0.5 kpc Resolution Spatially Resolved Investigations of Nuclear Dense Molecular Gas Properties in Nearby Ultraluminous Infrared Galaxies Based on HCN and HCO+ Three Transition Line Data [PDF]
The Astrophysical Journal, 2023 We present the results of our ALMA ≲0.5 kpc resolution dense molecular line (HCN and HCO ^+ J = 2–1, J = 3–2, and J = 4–3) observations of 12 nearby (ultra)luminous infrared galaxies ([U]LIRGs). After matching beam sizes of all molecular line data to the
Masatoshi Imanishi +3 more
doaj +2 more sources
Ultraluminous Infrared Galaxies and the Origin of Quasars [PDF]
The Astrophysical Journal, 1990 The Infrared Astronomical Satellite (IRAS) has discovered a class of ultraluminous infrared galaxies (Lᵢᵣ > 10¹² L_⊙) that are bolometrically as luminous, and slightly more numerous than optically selected quasars in the local universe (z ≲ 0.2). Ground-based observations of a complete sample of 10 of these infrared galaxies suggest that they
Sanders, D. B. +2 more
semanticscholar +5 more sources
Anomalous Hydrogen Recombination Line Ratios in Ultraluminous Infrared Galaxies [PDF]
Astrophysical Journal, 2021 We conducted systematic observations of the H i Brα (4.05 μm) and Brβ (2.63 μm) lines in 52 nearby (z < 0.3) ultraluminous infrared galaxies (ULIRGs) with AKARI.
Ken’ichi Yano +7 more
openalex +3 more sources
The Molecular Interstellar Medium in Ultraluminous Infrared Galaxies [PDF]
, 1996 We present CO observations of a large sample of ultraluminous IR galaxies out to z = 0.3. Most of the galaxies are interacting, but not completed mergers. All but one have high CO(1-0) luminosities, log(Lco [K-km/s-pc^2]) = 9.92 +/- 0.12.
D. Downes +6 more
core +3 more sources
Starburst and AGN activity in ultraluminous infrared galaxies [PDF]
, 2003 (Abridged) We examine the power source of 41 local Ultraluminous Infrared Galaxies using archival infrared and optical photometry. We fit the observed Spectral Energy Distributions (SEDs) with starburst and AGN components; each component being drawn from
Afonso, J. +5 more
core +2 more sources
Hidden Quasars in Ultraluminous Infrared Galaxies [PDF]
Symposium - International Astronomical Union, 1998 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).
H. D. Tran +3 more
openalex +4 more sources
Far-infrared metallicity diagnostics: application to local ultraluminous infrared galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 AbstractThe abundance of metals in galaxies is a key parameter that permits to distinguish between different galaxy formation and evolution models. Most of the metallicity determinations are based on optical line ratios. However, the optical spectral range is subject to dust extinction and, for high-z objects (z > 3), some of the lines used in ...
Pereira-Santaella, M. +4 more
openaire +5 more sources
A new look at local ultraluminous infrared galaxies: the atlas and radiative transfer models of their complex physics [PDF]
, 2021 We present the ultraviolet to submillimetre spectral energy distributions (SEDs) of the HERschel Ultra Luminous Infrared Galaxy Survey (HERUS) sample of 42 local ultraluminous infrared galaxies (ULIRGs) and fit them with a Markov chain Monte Carlo (MCMC)
A. Efstathiou +13 more
openalex +3 more sources
Graph Theoretical Analysis of local ultraluminous infrared galaxies and quasars [PDF]
Astronomy and Computing, 2023 Orestis Pavlou +5 more
openalex +3 more sources
Imaging of Ultraluminous Infrared Galaxies in the Near-UV [PDF]
, 2000 We present the first ground-based U' (3410 angstroms) images of Ultraluminous Infrared Galaxies (ULIGs). Strong U' emission (median total M_U' = -20.8) is seen in all systems and in some cases the extended tidal features (both the smooth stellar ...
Clements D. L. +9 more
core +4 more sources