Resolved nuclear CO(1-0) emission in APM08279+5255: Gravitational lensing by a naked cusp?
نویسندگان
چکیده
The ultraluminous broad absorption line quasar APM08279+5255 is one of the most luminous systems known. Here, we present an analysis of its nuclear CO(1-0) emission. Its extended distribution suggests that the gravitational lens in this system is highly elliptical, probably a highly inclined disk. The quasar core, however, lies in the vicinity of naked cusp, indicating that APM08279+5255 is truly the only odd-image gravitational lens. This source is the second system for which the gravitational lens can be used to study structure on sub-kpc scales in the molecular gas associated with the AGN host galaxy. The observations and lens model require CO distributed on a scale of ∼ 400 pc. Using this scale, we find that the molecular gas mass makes a significant, and perhaps dominant, contribution to the total mass within a couple hundred parsecs of the nucleus of APM08279+5255.
منابع مشابه
Imaging the Molecular Gas in a Z=3.9 Quasar Host Galaxy at 0.3 Resolution: a Central, Sub-kiloparsec Scale Star Formation Reservoir in Apm08279+5255
We have mapped the molecular gas content in the host galaxy of the strongly lensed high redshift quasar APM08279+5255 (z = 3.911) with the Very Large Array at 0.3 resolution. The CO(J=1→0) emission is clearly resolved in our maps. The CO(J=1→0) line luminosity derived from these maps is in good agreement with a previous single-dish measurement. In contrast to previous interferometerbased studie...
متن کاملHcn J=5-4 Emission in Apm08279+5255 at Z=3.91
We detect HCN J=5-4 emission from the ultraluminous quasar APM08279+5255 at z=3.911 using the IRAM Plateau de Bure interfer-ometer. This object is strongly gravitationally lensed, yet still thought to be one of the most intrinsically luminous objects in the Universe. The new data imply a line luminosity L ′ HCN (J=5−4) = 4.0 ± 0.5 × 10 10 K km s −1 pc 2. The ∼ 440 km s −1 full width half maximu...
متن کاملCo(1–0) in Z&4 Quasar Host Galaxies: No Evidence for Extended Molecular Gas Reservoirs
We present CO(J=1→0) observations of the high–redshift quasi–stellar objects (QSOs) BR12020725 (z = 4.69), PSSJ2322+1944 (z = 4.12), and APM08279+5255 (z = 3.91) using the NRAO Green Bank Telescope (GBT) and the MPIfR Effelsberg 100m telescope. We detect, for the first time, the CO ground–level transition in BR1202-0725. For PSS J2322+1944 and APM08279+5255, our observations result in line flux...
متن کاملDetection of Co(4–3), Co(9–8), and Dust Emission in the Bal Quasar Apm 08279+5255 at a Redshift of 3.9
We detected with the IRAM interferometer the lines of CO(4–3) and CO(9–8) from the recently-discovered broad absorption line quasar APM 08279+5255. The molecular lines are at a redshift of 3.9110, which we take to be the true cosmological redshift of the quasar’s host galaxy. This means the quasar emission lines at z = 3.87 are blueshifted by a kinematic component of 2500 km s, and, along with ...
متن کاملEffects of Triaxiality on the Statistics of Large-separation Gravitational Lenses
We study the statistics of large-separation gravitational lens systems produced by non-spherical halos in the Cold Dark Matter (CDM) model. Specifically, we examine how the triaxiality of CDM halos affects the overall lensing probabilities and the relative numbers of different image configurations (double, quadruple, and naked cusp lenses). We find that triaxiality significantly enhances lensin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008