HI absorption in a gravitational lens at z ∼ 0.7645

@article{Kanekar2003HIAI,
  title={HI absorption in a gravitational lens at z ∼ 0.7645},
  author={Nissim Kanekar and F. H. Briggs Kapteyn Institute and The Netherlands Rsaa and The Australian National University and Australia.},
  journal={Astronomy and Astrophysics},
  year={2003},
  volume={412}
}
We have used the Westerbork Synthesis Radio Telescope to detect HI 21 cm absorption at $z \sim 0.7645$ in the gravitational lens system towards PMN J0134-0931. The 21 cm profile has two broad components, with peak optical depths of $0.047 \pm 0.007$ and $0.039 \pm 0.007$, at heliocentric redshifts $0.76470 \pm 0.00006$ and $0.76348 \pm 0.00006$, respectively. The redshift of the stronger component matches that of CaII H and K absorption detected earlier. The absorption has a total velocity… Expand

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References

SHOWING 1-10 OF 20 REFERENCES
Molecular gas at intermediate redshifts
We present Giant Metrewave Radio Telescope (GMRT) observations of OH absorption in B3 1504+377 ($z \sim 0.673$) and PKS 1413+135 ($z \sim 0.247$). OH has now been detected in absorption towards fourExpand
Detection of OH and wide Hi absorption toward B0218+357
We present deep Giant Metrewave Radio Telescope (GMRT) OH and Westerbork Synthesis Radio Telescope (WSRT) H I absorption spectra of the z = 0.6846 gravitational lens toward B0218 + 357. Both theExpand
A deep search for 21-cm absorption in high redshift damped Lyman-alpha systems
We present deep GMRT 21-cm absorption spectra of 10 damped Lyman- systems (DLAs), of which 8 are at redshifts z> 1:3. HI absorption was detected in only one DLA, the z= 0:5318 absorber toward PKSExpand
B1359+154: A Six-Image Lens Produced by a z ≃ 1 Compact Group of Galaxies*
Hubble Space Telescope (HST) V- and I-band observations show that the gravitational lens B1359+154 consists of six images of a single zs = 3.235 radio source and its star-forming host galaxy,Expand
The Quintuple Quasar: Mass Models and Interpretation
The strange morphology of the six-component gravitational lens PMN J0134-0931 has resisted explanation. We present the first successful quantitative models for the system, based on the idea thatExpand
The Reddest Quasars
In a survey of quasar candidates selected by matching the Faint Images of the Radio Sky at Twenty cm (FIRST) and Two Micron All-Sky Survey catalogs, we have found two extraordinarily red quasars.Expand
Neutral hydrogen 21 centimeter absorption at Z = 0.6847 toward the 'smallest Einstein ring'
We detect neutral hydrogen 21 cm absorption toward the smallest Einstein ring, 0218+357, at a redshift of 0.6847. The implied H I column density is N(H I)=4×10 18 (T s /f) cm −2 , where T s is theExpand
The Redshift of a Lensing Galaxy in PMN J0134?0931
The Sloan Digital Sky Survey (SDSS) automatically targeted as a quasar candidate the recently discovered, gravitationally lensed, extremely reddened z = 2.2 quasar PMN 0134-0931. The SDSS spectrumExpand
PMN J0134?0931: A Gravitationally Lensed Quasar with Unusual Radio Morphology
The radio-loud quasar J0134-0931 was discovered to have an unusual morphology during our search for gravitational lenses. In Very Large Array and MERLIN images, there are five compact components withExpand
The Quintuple Quasar: Radio and Optical Observations
We present results from high-resolution radio and optical observations of PMN J0134-0931, a gravitational lens with a unique radio morphology and an extremely red optical counterpart. Our dataExpand
...
1
2
...