PKS 1830-211: A possible compound gravitational lens

J. E.J. Lovell; J. E. Reynolds; D. L. Jauncey; P. R. Backus; P. M. McCulloch; M. W. Sinclair; W. E. Wilson; A. K. Tzioumis; E. A. King; R. G. Gough; S. P. Ellingsen; C. J. Phillips; R. A. Preston; D. L. Jones

doi:10.1086/310353

PKS 1830-211: A possible compound gravitational lens

J. E.J. Lovell, J. E. Reynolds, D. L. Jauncey, P. R. Backus, P. M. McCulloch, M. W. Sinclair, W. E. Wilson, A. K. Tzioumis, E. A. King, R. G. Gough, S. P. Ellingsen, C. J. Phillips, R. A. Preston, D. L. Jones

Research output: Contribution to journal › Article › peer-review

54 Citations (Scopus)

Abstract

Measurements of the properties of gravitational lenses have the power to tell us what sort of universe we live in. The brightest known radio Einstein ring/gravitational lens PKS 1830-211, while obscured by our Galaxy at optical wavelengths, has recently been shown to contain absorption at the millimeter waveband at a redshift of 0.89. We report the detection of a new absorption feature, most likely due to neutral hydrogen in a second redshift system at z = 0.19. Follow-up VLBI observations have spatially resolved the absorption and reveal it to cover the NE compact component and part of the lower surface brightness ring. This new information, together with existing evidence of the unusual VLBI radio structure and difficulties in modeling the lensing system, points to the existence of a second lensing galaxy along our line of sight and implies that PKS 1830-211 may be a compound gravitational lens.

Original language	English
Pages (from-to)	L5-L7
Journal	Astrophysical Journal
Volume	472
Issue number	1 PART II
DOIs	https://doi.org/10.1086/310353
Publication status	Published - 1996
Externally published	Yes

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title = "PKS 1830-211: A possible compound gravitational lens",

abstract = "Measurements of the properties of gravitational lenses have the power to tell us what sort of universe we live in. The brightest known radio Einstein ring/gravitational lens PKS 1830-211, while obscured by our Galaxy at optical wavelengths, has recently been shown to contain absorption at the millimeter waveband at a redshift of 0.89. We report the detection of a new absorption feature, most likely due to neutral hydrogen in a second redshift system at z = 0.19. Follow-up VLBI observations have spatially resolved the absorption and reveal it to cover the NE compact component and part of the lower surface brightness ring. This new information, together with existing evidence of the unusual VLBI radio structure and difficulties in modeling the lensing system, points to the existence of a second lensing galaxy along our line of sight and implies that PKS 1830-211 may be a compound gravitational lens.",

keywords = "Galaxies: distances and redshifts, Galaxies: individual (PKS 1830-211), Gravitational lensing",

author = "Lovell, {J. E.J.} and Reynolds, {J. E.} and Jauncey, {D. L.} and Backus, {P. R.} and McCulloch, {P. M.} and Sinclair, {M. W.} and Wilson, {W. E.} and Tzioumis, {A. K.} and King, {E. A.} and Gough, {R. G.} and Ellingsen, {S. P.} and Phillips, {C. J.} and Preston, {R. A.} and Jones, {D. L.}",

year = "1996",

doi = "10.1086/310353",

language = "English",

volume = "472",

pages = "L5--L7",

journal = "Astrophysical Journal",

issn = "0004-637X",

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number = "1 PART II",

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TY - JOUR

T1 - PKS 1830-211

T2 - A possible compound gravitational lens

AU - Lovell, J. E.J.

AU - Reynolds, J. E.

AU - Jauncey, D. L.

AU - Backus, P. R.

AU - McCulloch, P. M.

AU - Sinclair, M. W.

AU - Wilson, W. E.

AU - Tzioumis, A. K.

AU - King, E. A.

AU - Gough, R. G.

AU - Ellingsen, S. P.

AU - Phillips, C. J.

AU - Preston, R. A.

AU - Jones, D. L.

PY - 1996

Y1 - 1996

N2 - Measurements of the properties of gravitational lenses have the power to tell us what sort of universe we live in. The brightest known radio Einstein ring/gravitational lens PKS 1830-211, while obscured by our Galaxy at optical wavelengths, has recently been shown to contain absorption at the millimeter waveband at a redshift of 0.89. We report the detection of a new absorption feature, most likely due to neutral hydrogen in a second redshift system at z = 0.19. Follow-up VLBI observations have spatially resolved the absorption and reveal it to cover the NE compact component and part of the lower surface brightness ring. This new information, together with existing evidence of the unusual VLBI radio structure and difficulties in modeling the lensing system, points to the existence of a second lensing galaxy along our line of sight and implies that PKS 1830-211 may be a compound gravitational lens.

AB - Measurements of the properties of gravitational lenses have the power to tell us what sort of universe we live in. The brightest known radio Einstein ring/gravitational lens PKS 1830-211, while obscured by our Galaxy at optical wavelengths, has recently been shown to contain absorption at the millimeter waveband at a redshift of 0.89. We report the detection of a new absorption feature, most likely due to neutral hydrogen in a second redshift system at z = 0.19. Follow-up VLBI observations have spatially resolved the absorption and reveal it to cover the NE compact component and part of the lower surface brightness ring. This new information, together with existing evidence of the unusual VLBI radio structure and difficulties in modeling the lensing system, points to the existence of a second lensing galaxy along our line of sight and implies that PKS 1830-211 may be a compound gravitational lens.

KW - Galaxies: distances and redshifts

KW - Galaxies: individual (PKS 1830-211)

KW - Gravitational lensing

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DO - 10.1086/310353

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SN - 0004-637X

VL - 472

SP - L5-L7

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART II

ER -

PKS 1830-211: A possible compound gravitational lens

Abstract

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