GMRT detection of HI 21 cm associated absorption towards thez = 1.2 red quasar 3C 190

@article{IshwaraChandra2003GMRTDO,
  title={GMRT detection of HI 21 cm associated absorption towards thez = 1.2 red quasar 3C 190},
  author={C. H. Ishwara-Chandra and K. S. Dwarakanath and K. R. Anantharamaiah},
  journal={Journal of Astrophysics and Astronomy},
  year={2003},
  volume={24},
  pages={37-43}
}
We report the GMRT detection of associated HI 21 cm-line absorption in thez = 1.1946 red quasar 3C 190. Most of the absorption is blue-shifted with respect to the systemic redshift. The absorption, at ∼ 647.7 MHz, is broad and complex, spanning a velocity width of ∼ 600 kms−1. Since the core is self-absorbed at this frequency, the absorption is most likely towards the hotspots. Comparison of the radio and deep optical images reveal linear filaments in the optical which overlap with the brighter… Expand

Figures from this paper

uGMRT search for cold gas at z ∼ 1–1.4 towards red quasars
We present results from our search for H i 21-cm and OH 18-cm absorption at z ∼ 1–1.4 towards red quasars showing strong Mg ii absorption using upgraded Giant Metrewave Radio Telescope. The quasarsExpand
A search for H i and OH absorption in z ≳ 3 CO emitters
We present the results of a survey for HI 21-cm and OH 18-cm absorption in seven strong CO emitters at z > 3. Despite reaching limits comparable to those required to detect 21-cm absorption at lowerExpand
A Search for Intrinsic H i 21 cm and OH 18 cm Absorption toward Compact Radio Sources
We present the results of a large search for intrinsic HI 21 cm and OH 18 cm absorption in 145 compact radio sources in the redshift range 0.02< z <3.8 with the Green Bank Telescope. We re-detect HIExpand
Measuring changes in the fundamental constants with redshifted radio absorption lines
Strong evidence has recently emerged for a variation in the fine structure constant, alpha equivalent to e(2)/hc, over the history of the Universe. This was concluded from a detailed study of theExpand
The interstellar and circumnuclear medium of active nuclei traced by H i 21 cm absorption
This review summarises what we have learnt in the last two decades based on H i 21 cm absorption observations about the cold interstellar medium (ISM) in the central regions of active galaxies andExpand
An ASKAP survey for H i absorption towards dust-obscured quasars
Obscuration of quasars by accreted gas and dust, or dusty intervening galaxies, can cause active galactic nuclei (AGN) to be missed in optically selected surveys. Radio observations can overcomeExpand
PKS B1740$\mathbf {-}$517: An ALMA view of the cold gas feeding a distant interacting young radio galaxy
Cold neutral gas is a key ingredient for growing the stellar and central black hole mass in galaxies throughout cosmic history. We have used the Atacama Large Millimetre Array to detect a rareExpand
Broad, weak 21 cm absorption in an early-type galaxy: spectral line finding and parametrization for future surveys
ABSTRACT We report conclusive verification of the detection of associated H I 21cm absorption inthe early-type host galaxy of the compact radio source PMNJ2054–4242. We estimate aneffective spectralExpand
Cold neutral hydrogen gas in galaxies
  • R. Dutta
  • Physics
  • Journal of Astrophysics and Astronomy
  • 2019
This review summarizes recent studies of the cold neutral hydrogen gas associated with galaxies probed via the HI 21-cm absorption line. HI 21-cm absorption against background radio-loud quasars is aExpand
Giant Metrewave Radio Telescope Detections of Two High-opacity Hi 21 cm Absorbers at z ≈ 1.2
We report the discovery of two remarkable high-opacity HI 21cm absorbers against low-luminosity active galactic nuclei (AGNs), at $z = 1.2166$ towards J0229+0044 and at $z=1.1630$ towards J0229+0053.Expand
...
1
2
...

References

SHOWING 1-10 OF 25 REFERENCES
Associated Absorption in Radio Quasars. I. C IV Absorption and the Growth of Radio Sources
We assess the global properties of associated C IV λλ1548, 1550 absorption lines measured in the spectra of radio-loud quasars drawn from a near-complete, low-frequency-selected sample. TheExpand
Infrared photometry of z ∼ 1 3C quasars
We present JHKL′ photometry of a complete sample of steep-spectrum radio-loud quasars from the revised 3CR catalogue in the redshift range 0.65z<1.20. After correcting for contributions from emissionExpand
A Strong Jet-Cloud Interaction in the Seyfert Galaxy IC 5063: VLBI Observations
We present 21 cm H I line and 13 cm continuum observations, obtained with the Australian Long Baseline Array, of the Seyfert 2 galaxy IC 5063. This object appears to be one of the best examples ofExpand
Redshifted Neutral Hydrogen 21 Centimeter Absorption toward Red Quasars
We have searched for redshifted neutral hydrogen 21 cm absorption toward sources from the Stickel et al. "red quasar" subsample. The red quasar subsample is taken from the 1 Jy sample ofExpand
The Host Galaxy and Environment of the z = 1.195 Quasar 3C 190*
We present deep imaging and spectroscopic observations of the z = 1.195 quasar 3C 190 and its immediate environment. The quasar is surrounded by an asymmetric, low surface brightness envelope inExpand
Parsec-Scale Radio Structure and Broad Optical Emission Lines in a Complete Sample of 3CR Lobe-dominated Quasars
We present results from VLBI observations of 24 of the 25 lobe-dominated quasars (LDQs) in the 3CR complete sample and from optical spectrophotometry of 14 of these objects. The VLBI observationsExpand
Atomic Hydrogen in the Powerful Radio-Infrared Galaxies 4C 12.50 and 3C 433
The 21-cm line of atomic hydrogen was detected in absorption in 4C 12.50 and 3C 433, two galaxies at redshifts beyond 0.1 that have radio powers comparable to that of radio-loud quasars. The columnExpand
H i absorption in radio galaxies: effect of orientation or interstellar medium?
A search for H i absorption has been made in 23 radio galaxies selected from a complete sample. The observations were made with the Australia Telescope Compact Array (ATCA), with the Very Large ArrayExpand
Red quasars not so dusty
Webster et al (1995) claimed that up to 80% of QSOs may be obscured by dust. They inferred the presence of this dust from the remarkably broad range of B-K optical-infrared colours of a sample ofExpand
Consequences of Dust in Damped Lyman-Alpha Systems
Dust has been detected in damped Lyα systems at high redshifts by two independent methods: the reddening of background quasars and the gas-phase depletion of Cr relative to Zn. Both methods give aExpand
...
1
2
3
...