Results 81 to 90 of about 5,389 (174)

Spitzer Quasar and ULIRG evolution study (QUEST): I. The origin of the far infrared continuum of QSOs [PDF]

, 2006
This paper addresses the origin of the far-infrared (FIR) continuum of QSOs, based on the Quasar and ULIRG Evolution Study (QUEST) of nearby QSOs and ULIRGs using observations with the Spitzer Space Telescope. For 27 Palomar-Green QSOs at z
Baker, A. J., Contursi, A., Dasyra, K., Genzel, R., Kim, D. -C., Lehnert, M. D., Lord, S., Lutz, D., Mazzarella, J., Netzer, H., Rupke, D., Schweitzer, M., Sternberg, A., Sturm, E., Tacconi, L. J., Veilleux, S.   +15 more
core   +3 more sources

Southern ultraluminous infrared galaxies: An optical and infrared database [PDF]

Astronomy and Astrophysics Supplement Series, 1997
We have carried out an optical and infrared study of 24 ultraluminous infrared galaxies in the southern hemisphere (SULIRGs). This flux limited, complete sample, has been extracted from the redshift survey of IRAS galaxies compiled by Strauss et al. (1992).
Duc, P. A., Mirabel, I. F., Maza Sancho, José   +2 more
openaire   +1 more source

Direct Evidence for Active Galactic Nuclei Feedback from Fast Molecular Outflows in Reionization-era Quasars

The Astrophysical Journal
Galactic outflows driven by rapidly accreting quasars at high redshift are widely expected to play a key role in the short- and long-term future evolution of their host galaxies.
Justin S. Spilker, Jaclyn B. Champagne, Xiaohui Fan, Seiji Fujimoto, Paul P. van der Werf, Jinyi Yang, Minghao Yue   +6 more
doaj   +1 more source

Millimeter-Wave Spectroscopy and Mapping of Quasar Hosts, and the Status of ULIRGs as Quasar 2s [PDF]

, 1998
It is becoming possible to detect high redshift quasars in various molecular lines, and to show by mapping lensed objects that the strong dust and molecular emission arises in warm dense ~100 pc-scale "tori." The properties of ULIRGs, at least those with
Alloin, Alloin, Antonucci, Antonucci, Antonucci, Barger, Barthel, Barvainis, Barvainis, Barvainis, Barvainis, Barvainis, Barvainis, Barvainis, Brown, Brown, Chini, de Zotti, Downes, Downes, Frayer, Genzel, Goodrich, Gopal-Krishna, Green, Guilloteau, Heisler, Hughes, Jackson, Keel, Kennicutt, Kim, Kneib, Krolik, Lawrence, Maiolino, Maiolino, Malkan, Ohta, Omont, Planesas, Radford, Robert Antonucci, Rush, Sanders, Sanders, Scoville, Scoville, Solomon, Solomon, Solomon, Tacconi, Tran, Wu, Yun   +54 more
core   +2 more sources

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, Ran Wang, Juan Molina, Jinyi Shangguan, Luis C. Ho, Franz E. Bauer, Ezequiel Treister   +6 more
doaj   +1 more source

Sub-arcsecond CO(1-0) and CO(2-1) observations of the ultraluminous infrared galaxy IRAS 10190+1322

, 2007
We present the results of high resolution mapping of the CO(1-0) and CO(2-1) emission of the ultraluminous infrared galaxy (ULIRG) IRAS 10190+1322, with the IRAM interferometer, down to an angular resolution of ~0.3 arcsec. This object is composed of two
Braine, Bushouse, Crawford, Dasyra, Downes, Evans, Farrah, Imanishi, J. Graciá-Carpio, Kim, L. Colina, Lo, Murphy, Murphy, Nagar, P. Planesas, Rupke, Sakamoto, Sanders, Solomon, Spergel, Veilleux, White   +22 more
core   +1 more source

The Environment of Local Ultraluminous Infrared Galaxies [PDF]

The Astrophysical Journal, 2007
31 pages, 9 figures, 2 tables, accepted for publication in ApJ, volume 660n1 (May 1, 2007)
Zauderer, B. A., Veilleux, S., Yee, H. K. C.   +2 more
openaire   +2 more sources

Building on the Archives: Connecting the CN/CO Intensity Ratio with Global Galaxy Properties in Nearby U/LIRGs

The Astrophysical Journal
We 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, Christine D. Wilson, Osvald Klimi, Núria Torres-Albà, Toshiki Saito   +4 more
doaj   +1 more source

APM 08279+5255: an ultraluminous BAL quasar at a redshift z=3.87

, 1998
We report on the discovery of a highly luminous, broad absorption line quasar at a redshift of $z=3.87$ which is positionally coincident, within one arcsecond, with the IRAS FSC source F08279+5255.
Edward J. Totten, Geraint F. Lewis, Guilloteau S., Hawkins M. R. S., Hook I. M., Kayser R., Michael J. Irwin, Oliver S. J., Prestage R., Rodrigo A. Ibata, Rowan-Robinson M., Sopp H. M., Williams L. L. R., Yee H. K. C.   +13 more
core   +1 more source

Far-infrared Emission Lines as Metallicity Diagnostic

The Astrophysical Journal
The 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, Tommy Wiklind, Skarleth Motiño Flores, Rafael T. Eufrasio   +3 more
doaj   +1 more source