The extraordinary CO luminosity of the far-infrared galaxy VII ZW 31 - A possible proto-galactic disk?

1987 ◽  
Vol 321 ◽  
pp. L103 ◽  
Author(s):  
Leslie J. Sage ◽  
P. M. Solomon
Keyword(s):  
Galactic Disk ◽  
Far Infrared ◽  
Infrared Galaxy

Evolution of the blue and far-infrared galaxy luminosity functions

1993 ◽  
Vol 105 ◽  
pp. 1333 ◽  
Author(s):  
Carol J. Lonsdale ◽  
Arati Chokshi
Keyword(s):  
Far Infrared ◽  
Infrared Galaxy ◽  
Luminosity Functions

scholarly journals Probing Physics and Chemistry in Circumnuclear Torus with OH

2005 ◽  
Vol 13 ◽  
pp. 848-850
Author(s):  
Yu Zhi-yao
Keyword(s):  
Far Infrared ◽  
Maser Emission ◽  
Central Source ◽  
Infrared Galaxy ◽  
Kinematic Properties

AbstractWe observed OH maser emission at 18cm in a circumnuclear torus surrounding the center of IRAS10173+0828 using the 7 telescopes of MERLIN, together with the Lovell antenna. IRAS10173+0828 is a distant super-luminous far-infrared galaxy. The OH maser emission is remarkably narrow (FWHP = 39km s_1) for its strength, and the 1667 and 1665 MHz lines are well separated. The 1667 transition shows two distinct peaks displaced from one another by 100 km s−1. Using our MERLIN observational results we probe the physics in the circumnuclear torus surrounding the center of IRAS10173+0828, obtain the kinematic properties of the torus, and study the central source.

scholarly journals OH Megamasers and Active Galactic Nuclei

1988 ◽  
Vol 129 ◽  
pp. 261-262
Author(s):  
R.P. Norris
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Disk ◽  
Galactic Nuclei ◽  
Far Infrared ◽  
Active Galaxies ◽  
Radio Continuum ◽  
Substantial Fraction ◽  
Continuum Source ◽  
Maser Amplifier ◽  
The Galaxy

OH megamasers are believed to be active galaxies in which a substantial fraction of the OH gas in the disk of the galaxy is stimulated by the intense far-infrared flux from the active nucleus. The result is that the galactic disk acts as a maser amplifier, producing in the OH line an amplified image of the radio continuum source in the nucleus. Megamasers promise to be powerful tools for the study of active galaxies, provided we can determine what it is that turns an active galaxy into a megamaser. Here I examine the archetypal megamaser galaxy Arp220 and ask the question: what makes it different from other active galaxies?

scholarly journals Herschel/HIFI Discoveryof a Far-Infrared DIB Analog

2013 ◽  
Vol 9 (S297) ◽  
pp. 197-202
Author(s):  
H. S. P. Müller ◽  
P. Schilke ◽  
M. Gerin ◽  
D. C. Lis ◽  
E. A. Bergin ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Molecular Clouds ◽  
Galactic Center ◽  
Galactic Disk ◽  
Far Infrared ◽  
Line Of Sight ◽  
Absorption Feature ◽  
Substantial Part ◽  
Star Forming ◽  
Star Forming Regions

AbstractThe Herschel Space Observatory carried out observations at far-infrared wavelengths, which significantly increased our knowledge of the interstellar medium and the star-formation process in the Milky Way and external galaxies, as well as our understanding of astrochemistry.Absorption features, known, e.g., from observations at millimeter wavelengths, are more commonly observed in the far-infrared, in particular toward strong dust continuum sources. The lowest energy transitions are not only observed at LSR-velocities related to the source, but often also at velocities associated with diffuse molecular clouds along the line of sight toward the background source.Unbiased spectral line surveys of the massive and very luminous Galactic Center sources Sagittarius B2(M) and (N) were carried out across the entire frequency range of the high-resolution Heterodyne Instrument for Far-Infrared Astronomy (HIFI). An absorption feature was detected toward both sources at about 617.531 GHz, corresponding to 20.599 cm−1, 485.47 μm, or 2.5539 meV. This feature is unique in its appearance at all velocity components associated with diffuse foreground molecular clouds, together with its conspicuous absence at velocities related to the sources themselves. The carriers of at least a substantial part of the DIBs are thought to reside in the diffuse interstellar medium. Therefore, we consider this absorption feature to be a far-infrared DIB analog.Subsequent dedicated observations confirmed that the line is present only in the foreground clouds on the line of sight toward other massive star-forming regions in the Galactic disk. There is indication that the feature has substructure, possibly of fine or hyperfine nature. Attempts to assign the feature to atomic or molecular species have been unsuccessful so far.

scholarly journals The radio emission from the ultraluminous far-infrared galaxy NGC 6240

1994 ◽  
Vol 436 ◽  
pp. 89 ◽  
Author(s):  
Edward J. M. Colbert ◽  
Andrew S. Wilson ◽  
Jonathan Bland-Hawthorn
Keyword(s):  
Radio Emission ◽  
Far Infrared ◽  
Infrared Galaxy

scholarly journals The Close AGN Reference Survey (CARS)

2019 ◽  
Vol 626 ◽  
pp. L3 ◽  
Author(s):  
I. Smirnova-Pinchukova ◽  
B. Husemann ◽  
G. Busch ◽  
P. Appleton ◽  
M. Bethermin ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Galactic Disk ◽  
Far Infrared ◽  
High Mass ◽  
Host Galaxy ◽  
Mass Loading ◽  
Narrow Line ◽  
Host Galaxies ◽  
Line Region ◽  
Narrow Line Region

The [C II]λ158 μm line is one of the strongest far-infrared (FIR) lines and an important coolant in the interstellar medium of galaxies that is accessible out to high redshifts. The excitation of [C II] is complex and can best be studied in detail at low redshifts. Here we report the discovery of the highest global [C II] excess with respect to the FIR luminosity in the nearby AGN host galaxy HE 1353−1917. This galaxy is exceptional among a sample of five targets because the AGN ionization cone and radio jet directly intercept the cold galactic disk. As a consequence, a massive multiphase gas outflow on kiloparsec scales is embedded in an extended narrow-line region. Because HE 1353−1917 is distinguished by these special properties from our four bright AGN, we propose that a global [C II] excess in AGN host galaxies could be a direct signature of a multiphase AGN-driven outflow with a high mass-loading factor.

scholarly journals A surprising consistency between the far-infrared galaxy luminosity functions of the field and Coma

2014 ◽  
Vol 442 (2) ◽  
pp. 1286-1293 ◽  
Author(s):  
S. Hickinbottom ◽  
C. J. Simpson ◽  
P. A. James ◽  
E. Ibar ◽  
D. Carter ◽  
...  
Keyword(s):  
Far Infrared ◽  
Infrared Galaxy ◽  
Luminosity Functions
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