Outflows in Active Galactic Nucleus/Starburst‐Composite Ultraluminous Infrared Galaxies

2005 ◽  
Vol 632 (2) ◽  
pp. 751-780 ◽  
Author(s):  
David S. Rupke ◽  
Sylvain Veilleux ◽  
D. B. Sanders
Keyword(s):  
Active Galactic Nucleus ◽  
Infrared Galaxies ◽  
Ultraluminous Infrared Galaxies

scholarly journals Megamasers in Active Galactic Nuclei

1998 ◽  
Vol 11 (2) ◽  
pp. 938-941 ◽  
Author(s):  
R. J. Cohen
Keyword(s):  
Active Galactic Nuclei ◽  
Active Galactic Nucleus ◽  
Local Group ◽  
Galactic Nuclei ◽  
Seyfert Galaxies ◽  
Infrared Galaxies ◽  
Ultraluminous Infrared Galaxies

Extragalactic masers were discovered more than 20 years ago (Whiteoak & Gardner 1973). It soon became apparent that those extragalactic masers we can detect are intrinsically very powerful and are located in galactic nuclei. The term Megamaser was coined to describe the most luminous OH masers, which are a million times more powerful than any OH masers within our own Galaxy (Baan & Haschick 1984). The same word is nowadays applied to any powerful maser associated with an active galactic nucleus (AGN). Whereas normal Galactic masers would be barely detectable outside the Local Group, megamasers are detectable in principle out to redshifts of z ~ 2 (Baan 1997). The galaxies hosting megamasers in their nuclei are invariably active in some degree: they include ultraluminous infrared galaxies, starbursts and Seyfert galaxies.

scholarly journals Dynamical Properties of Ultraluminous Infrared Galaxies. II. Traces of Dynamical Evolution and End Products of Local Ultraluminous Mergers

2006 ◽  
Vol 651 (2) ◽  
pp. 835-852 ◽  
Author(s):  
K. M. Dasyra ◽  
L. J. Tacconi ◽  
R. I. Davies ◽  
T. Naab ◽  
R. Genzel ◽  
...  
Keyword(s):  
Dynamical Evolution ◽  
Infrared Galaxies ◽  
End Products ◽  
Ultraluminous Infrared Galaxies ◽  
Dynamical Properties

scholarly journals Dynamical Properties of Ultraluminous Infrared Galaxies. I. Mass Ratio Conditions for ULIRG Activity in Interacting Pairs

2006 ◽  
Vol 638 (2) ◽  
pp. 745-758 ◽  
Author(s):  
K. M. Dasyra ◽  
L. J. Tacconi ◽  
R. I. Davies ◽  
R. Genzel ◽  
D. Lutz ◽  
...  
Keyword(s):  
Mass Ratio ◽  
Infrared Galaxies ◽  
Ultraluminous Infrared Galaxies ◽  
Dynamical Properties

scholarly journals Follow-up near-infrared spectroscopy of ultraluminous infrared galaxies observed by ISO

2005 ◽  
Vol 441 (3) ◽  
pp. 999-1010 ◽  
Author(s):  
H. Dannerbauer ◽  
D. Rigopoulou ◽  
D. Lutz ◽  
R. Genzel ◽  
E. Sturm ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Infrared Galaxies ◽  
Ultraluminous Infrared Galaxies

scholarly journals Hidden Quasars in Ultraluminous Infrared Galaxies

1999 ◽  
Vol 194 ◽  
pp. 181-183
Author(s):  
H. D. Tran ◽  
M. S. Brotherton ◽  
S. A. Stanford ◽  
W. van Breugel
Keyword(s):  
Emission Lines ◽  
Infrared Galaxies ◽  
Diagnostic Diagram ◽  
High Ionization ◽  
Ultraluminous Infrared Galaxies

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).

scholarly journals Ultraluminous Infrared Galaxies

1999 ◽  
Vol 186 ◽  
pp. 289-294 ◽  
Author(s):  
D.B. Sanders ◽  
J.A. Surace ◽  
C.M. Ishida
Keyword(s):  
Globular Clusters ◽  
Elliptical Galaxy ◽  
Seyfert Galaxies ◽  
Infrared Galaxies ◽  
Primary Stage ◽  
Massive Black Holes ◽  
Bolometric Luminosity ◽  
Ultraluminous Infrared Galaxies ◽  
Supernova Explosions ◽  
Galaxy Cores

At luminosities above ~ 1011L⊙, infrared galaxies become the dominant population of extragalactic objects in the local Universe (z < 0.5), being more numerous than optically selected starburst and Seyfert galaxies, and QSOs at comparable bolometric luminosity. At the highest luminosities, ultraluminous infrared galaxies (ULIGs: Lir > 1012L⊙), outnumber optically selected QSOs by a factor of ~ 1.5–2. All of the nearest ULIGs (z <0.1) appear to be advanced mergers that are powered by both a circumnuclear starburst and AGN, both of which are fueled by an enormous concentration of molecular gas (~ 1010M⊙) that has been funneled into the merger nucleus. ULIGs may represent a primary stage in the formation of massive black holes and elliptical galaxy cores. The intense circumnuclear starburst that accompanies the ULIG phase may also represent a primary stage in the formation of globular clusters, and the metal enrichment of the intergalactic medium by gas and dust expelled from the nucleus due to the combined forces of supernova explosions and powerful stellar winds.

scholarly journals Atomic Hydrogen Gas Images of QSO Host Galaxies

2002 ◽  
Vol 199 ◽  
pp. 122-126
Author(s):  
J. Lim ◽  
P.T.P. Ho
Keyword(s):  
Atomic Hydrogen ◽  
Hydrogen Gas ◽  
Significant Fraction ◽  
Host Galaxies ◽  
Infrared Galaxies ◽  
Parent Population ◽  
Tidal Interactions ◽  
Ultraluminous Infrared Galaxies

We present the first neutral atomic hydrogen (HI) gas images of QSO host galaxies. The results come from our ongoing survey of all twenty-three QSOs at redshifts z < 0.07 visible from the VLA. Our images show tidal interactions in all of the QSO host galaxies detected in HI, even when no such interactions are clearly visible in the optical. The results are not consistent with the suggestion by Sanders et al. (1988a, 1988b) that ultraluminous infrared galaxies, the vast majority of which are later-stage mergers, are the parent population of a significant fraction of radio-quiet QSOs. Instead, our results suggest that QSOs reside in a wide variety of interacting environments.

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