The Redshift of the Gravitationally Lensed Radio Source Pks 1830−211
نویسنده
چکیده
We report on the spectroscopic identification and the long awaited redshift measurement of the heavily obscured, gravitationally lensed radio source PKS 1830
منابع مشابه
ar X iv : 0 70 7 . 20 53 v 2 [ as tr o - ph ] 1 9 Fe b 20 09 Variable X - ray Absorption toward Gravitationally - Lensed Blazar PKS 1830 − 211
We present X-ray spectral analysis of five Chandra and XMM-Newton observations of the gravitationally-lensed blazar PKS 1830−211 from 2000 to 2004. We show that the X-ray absorption toward PKS 1830−211 is variable, and the variable absorption is most likely to be intrinsic with amplitudes of ∼ 2× 10– 30 × 10cm depending on whether or not the absorber is partially covering the X-ray source. Our ...
متن کاملHelical Jet in the Gravitationally Lensed Blazar PKS 1830 - 211
Recent radio VLBI observations of the complex gravitationally lensed system PKS1830-211 have thrown up some questions with regard to the processes occuring at the heart of the blazar source at a redshift of 2.51, which is viewed almost straight down the jet axis. This work links, by a model of a helical jet tracked by ballistically ejected plasmons from a precessing nozzle, observations on the ...
متن کاملCosmic alignment towards the radio Einstein ring PKS 1830 – 211 1
Optical and near-IR Hubble Space Telescope and Gemini-North adaptive optics images, further improved through deconvolution, are used to explore the gravitationally lensed radio source PKS 1830–211. We show that the line of sight to the quasar at z = 2.507 is very busy with the presence, within 0.5 ′′ from the 1 Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from t...
متن کاملThe kinetic temperature of a molecular cloud at redshift 0 . 9 : Ammonia in the gravitational lens PKS 1830 – 211
Context. Little is known about the structure of the interstellar medium and the nature of individual clouds in galaxies at intermediate redshifts. The gravitational lens toward PKS1830–211 offers the unique possibility to study this interstellar gas with high sensitivity and angular resolution in a molecular cloud that existed half a Hubble time ago. Aims. This multi-line study aims at a better...
متن کاملImage Deconvolution of the Radio Ring PKS 1830 { 2111
New high quality Keck and ESO images of PKS 1830{211 are presented. Applying a powerful new deconvolution algorithm to these optical and infrared data, both images of the at spectrum core of the radio source have been identiied. An extended source is also detected in the optical images, consistent with the expected location of the lensing galaxy. The source counterparts are very red at I ? K 7,...
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 1999