Confirmation of two extended objects along the line of sight to PKS 1830-211 with ESO-VLT adaptive optics imaging

G. Meylan; F. Courbin; C. Lidman; J. -P. Kneib; L. E. Tacconi-Garman

doi:10.1051/0004-6361:200500145

Confirmation of two extended objects along the line of sight to PKS 1830-211 with ESO-VLT adaptive optics imaging

G. Meylan, F. Courbin, C. Lidman, J. -P. Kneib, L. E. Tacconi-Garman

Research School of Astronomy & Astrophysics

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

14 Citations (Scopus)

Abstract

We report on new high-resolution near-infrared images of the gravitationally lensed radio source PKS 1830-211, a quasar at z=2.507. These adaptive optics observations, taken with the Very Large Telescope (VLT), are further improved through image deconvolution. They confirm the presence of a second object along the line of sight to the quasar, in addition to the previously known spiral galaxy. This additional object is clearly extended in our images. However, its faint luminosity does not allow to infer any photometric redshift. If this galaxy is located in the foreground of PKS 1830-211, it complicates the modeling of this system and decreases the interest in using PKS 1830-211 as a means to determine H₀ via the time delay between the two lensed images of the quasar.

Original language	English
Pages (from-to)	L37-L40
Journal	Astronomy and Astrophysics
Volume	438
DOIs	https://doi.org/10.1051/0004-6361:200500145
Publication status	Published - 1 Aug 2005

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10.1051/0004-6361:200500145

https://ui.adsabs.harvard.edu/abs/2005A&A...438L..37M

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title = "Confirmation of two extended objects along the line of sight to PKS 1830-211 with ESO-VLT adaptive optics imaging",

abstract = "We report on new high-resolution near-infrared images of the gravitationally lensed radio source PKS 1830-211, a quasar at z=2.507. These adaptive optics observations, taken with the Very Large Telescope (VLT), are further improved through image deconvolution. They confirm the presence of a second object along the line of sight to the quasar, in addition to the previously known spiral galaxy. This additional object is clearly extended in our images. However, its faint luminosity does not allow to infer any photometric redshift. If this galaxy is located in the foreground of PKS 1830-211, it complicates the modeling of this system and decreases the interest in using PKS 1830-211 as a means to determine H0 via the time delay between the two lensed images of the quasar.",

keywords = "gravitational lensing, quasars: individual:, PKS 1830-211, Astrophysics",

author = "G. Meylan and F. Courbin and C. Lidman and Kneib, {J. -P.} and Tacconi-Garman, {L. E.}",

year = "2005",

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doi = "10.1051/0004-6361:200500145",

language = "English",

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TY - JOUR

T1 - Confirmation of two extended objects along the line of sight to PKS 1830-211 with ESO-VLT adaptive optics imaging

AU - Meylan, G.

AU - Courbin, F.

AU - Lidman, C.

AU - Kneib, J. -P.

AU - Tacconi-Garman, L. E.

PY - 2005/8/1

Y1 - 2005/8/1

N2 - We report on new high-resolution near-infrared images of the gravitationally lensed radio source PKS 1830-211, a quasar at z=2.507. These adaptive optics observations, taken with the Very Large Telescope (VLT), are further improved through image deconvolution. They confirm the presence of a second object along the line of sight to the quasar, in addition to the previously known spiral galaxy. This additional object is clearly extended in our images. However, its faint luminosity does not allow to infer any photometric redshift. If this galaxy is located in the foreground of PKS 1830-211, it complicates the modeling of this system and decreases the interest in using PKS 1830-211 as a means to determine H0 via the time delay between the two lensed images of the quasar.

AB - We report on new high-resolution near-infrared images of the gravitationally lensed radio source PKS 1830-211, a quasar at z=2.507. These adaptive optics observations, taken with the Very Large Telescope (VLT), are further improved through image deconvolution. They confirm the presence of a second object along the line of sight to the quasar, in addition to the previously known spiral galaxy. This additional object is clearly extended in our images. However, its faint luminosity does not allow to infer any photometric redshift. If this galaxy is located in the foreground of PKS 1830-211, it complicates the modeling of this system and decreases the interest in using PKS 1830-211 as a means to determine H0 via the time delay between the two lensed images of the quasar.

KW - gravitational lensing

KW - quasars: individual:

KW - PKS 1830-211

KW - Astrophysics

U2 - 10.1051/0004-6361:200500145

DO - 10.1051/0004-6361:200500145

M3 - Article

SN - 0004-6361

VL - 438

SP - L37-L40

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Confirmation of two extended objects along the line of sight to PKS 1830-211 with ESO-VLT adaptive optics imaging

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