Results 81 to 90 of about 5,377 (132)
Investigating the central engine of ultraluminous infrared galaxies: near infrared imaging [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We present 0.5-arcsec-resolution near-infrared images of six ultraluminous infrared galaxies with known redshifts. Six of the eight bright nuclei are resolved on kiloparsec scales, suggesting that there is significant circumnuclear star formation or close progenitor nuclei.
Davies, R., Burston, A., Ward, M.
openaire +2 more sources
The Astrophysical JournalWe use the CN/CO intensity ratio to obtain the dense gas fraction, f _dense , for a sample of 16 ultraluminous and luminous infrared (IR) galaxies and compare f _dense with a suite of global galaxy properties.
Blake Ledger +4 more
doaj +1 more source
Dynamics of Molecular Gas in the Central Region of the Quasar I Zwicky 1
The Astrophysical Journal, 2023 We present a study of the molecular gas distribution and kinematics in the cicumnuclear region (radii ≲2 kpc) of the z ≈ 0.061 quasar I Zwicky 1 using a collection of available Atacama Large Millimeter/submillimeter Array observations of the carbon ...
Qinyue Fei +6 more
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Star-Forming AGN Host Galaxies
, 2001 The symbiosis of nuclear activity and star-formation in galaxies, as manifested in their spectral energy distributions (SEDs) is reviewed. Attention is drawn to an Hertzsprung-Russell diagram-equivalent for such objects, as well as to the importance of ...
Bregman +49 more
core +3 more sources
Mid-Infrared and Optical Spectroscopy of Ultraluminous Infrared Galaxies: A Comparison
The Astrophysical Journal, 1999 aastex, 1 eps figure. Accepted by ApJ (Letters)
Lutz, D., Veilleux, S., Genzel, R.
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Far-infrared Emission Lines as Metallicity Diagnostic
The Astrophysical JournalThe chemical abundance of the interstellar medium is a key tracer of galaxy evolution. Optical and ultraviolet emission lines are widely used to derive gas-phase metallicities, but suffer from uncertainties due to possible temperature fluctuations and ...
Elizabeth Fletcher +3 more
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Compact starbursts in ultraluminous infrared galaxies
The Astrophysical Journal, 1991 The 40 ultraluminous galaxies in the IRAS Bright Galaxy Sample of sources stronger than S = 5.24 Jy at lambda = 60 microns were mapped with approximately 0.25 arcsec resolution at 8.44 GHz. Twenty-five contain diffuse radio sources obeying the FIR-radio correlation; these are almost certainly starburst galaxies.
J. J. Condon +3 more
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The Astrophysical JournalUltrafast outflows (UFOs) are thought to be a driving mechanism of large-scale winds driven by active galactic nuclei (AGN), which cause significant galactic feedback through quenching star formation and regulating supermassive black hole growth.
Jerome Seebeck +11 more
doaj +1 more source
The Growth of Black Holes and Their Host Spheroids in (Sub)mm-loud QSOs at High Redshift
, 2007 We study the growth of black holes and stellar population in spheroids at high redshift using several (sub)mm-loud QSO samples. Applying the same criteria established in an earlier work, we find that, similar to IR QSOs at low redshift, the far-infrared ...
Adams F C +38 more
core +2 more sources
Silicates in Ultraluminous Infrared Galaxies
The Astrophysical Journal, 2008 We analyze the mid-infrared (MIR) spectra of ultraluminous infrared galaxies (ULIRGs) observed with the Spitzer Space Telescope's Infrared Spectrograph. Dust emission dominates the MIR spectra of ULIRGs, and the reprocessed radiation that emerges is independent of the underlying heating spectrum.
Sirocky, M. M. +4 more
openaire +4 more sources