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.

scholarly journals High Spatial Resolution Near-IR Tip/Tilt Imaging of “Warm” Ultraluminous Infrared Galaxies

1999 ◽  
Vol 186 ◽  
pp. 363-363
Author(s):  
J.A. Surace ◽  
D.B. Sanders
Keyword(s):  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Compact Star ◽  
Dust Emission ◽  
Host Galaxies ◽  
Infrared Galaxies ◽  
Star Forming ◽  
Compact Source ◽  
Near Ir ◽  
Ultraluminous Infrared Galaxies

We present results from high spatial resolution (FWHM ≈ 0.3–0.5″) near-IR (1.6 and 2.1μm) imaging of a complete sample of ultraluminous infrared galaxies (ULIGs) chosen to have “warm” mid-IR colors (f25/f60 > 0.2) characteristic of AGN. In conjunction with our WFPC2 imaging program (Surace et al. 1998), we have found that nearly all of these systems are advanced mergers with complex nuclear morphologies. The extended underlying galaxies are detected in each system at H and K′, and are found to have luminosities of a few L∗, similar to quasars (McLeod & Rieke 1994). Many of the circumnuclear star-forming knots seen at optical wavelengths have been detected. Based on model SEDs, their bolometric luminosities appear similar to those of the extended nuclear starbursts seen in other, less-luminous interacting systems (i.e. NGC 4038/9). Each ULIG is increasingly dominated at long wavelengths by a compact source which we identify as a putative active nucleus. The optical/near-IR colors of these putative nuclei are more extreme than the most infrared-active starburst galaxies, yet are identical to “far-IR loud” quasars which are in turn similar to optical quasars with significant hot (800 K) dust emission. Half of the ULIGs have dereddened nuclear near-IR luminosities comparable to those of QSOs, while the others resemble Seyferts; this may be an effect of patchy extinction and scattering. Similarities between the putative ULIG nuclei and QSO nuclei, the underlying host galaxies, and the apparent young age of the ULIGs (as evidenced by their compact star-forming knots) support the evolution of “warm” ULIGs into optical QSOs.

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

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 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 Comparing the host galaxies of different type supernovae

2015 ◽  
Vol 11 (S319) ◽  
pp. 139-139
Author(s):  
Y. C. Liang ◽  
X. Shao ◽  
M. Dennefeld ◽  
X. Y. Chen ◽  
L. Zhou ◽  
...  
Keyword(s):  
Stellar Mass ◽  
Significant Fraction ◽  
Host Galaxies ◽  
Global Properties ◽  
Different Types ◽  
Type Ia ◽  
Total Light ◽  
Stellar Masses ◽  
Almost All ◽  
Cross Matching

AbstractWe compare the host galaxies of 902 supernovae, including Type Ia, II and Ibc, which are selected by cross-matching the Asiago Supernova Catalog with the SDSS DR7. We further selected 213 galaxies by requiring the light fraction of spectral observations > 15%, which could represent well the global properties of the galaxies. The diagrams related to Dn(4000), HδA, stellar masses, SFRs and specific SFRs for the SNe hosts show that almost all SNe II and most of SNe Ibc occur in SF galaxies. A significant fraction of SNe Ia occurs in AGNs and Absorp galaxies. These results are compared with those of the 689 comparison galaxies where the SDSS fiber captures < 15% of the total light. These comparison galaxies appear biased towards higher 12+log(O/H) (~0.1dex) at a given stellar mass, suggesting the aperture effect should be kept in mind when the properties of the hosts for different types of SNe are discussed.

Sign in / Sign up

Export Citation Format

Share Document