Multifrequency analysis of the new wide-separation gravitational lens candidate RX J0921 + 4529

J. A. Muñoz; E. E. Falco; C. S. Kochanek; J. Lehár; B. A. McLeod; B. R. McNamara; A. A. Vikhlinin; C. D. Impey; H. W. Rix; C. R. Keeton; C. Y. Peng; C. R. Mullis

doi:10.1086/318322

Multifrequency analysis of the new wide-separation gravitational lens candidate RX J0921 + 4529

J. A. Muñoz, E. E. Falco, C. S. Kochanek, J. Lehár, B. A. McLeod, B. R. McNamara, A. A. Vikhlinin, C. D. Impey, H. W. Rix, C. R. Keeton, C. Y. Peng, C. R. Mullis

Astronomy

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Abstract

We report the discovery of a new two-image gravitational lens candidate. The system RX J0921 + 4529 contains two z_s = 1.66 quasars separated by 6″.93 with an H-band magnitude difference of Δm = 1.39. The HST NIC2 H-band images reveal an H = 18.2 spiral galaxy between the quasar images, which is probably a member of a z_l = 0.32 X-ray cluster centered on the field. We detect an extended source near the fainter quasar image but not in the brighter image. If this extended source is the host galaxy of the fainter quasar, then the system is a binary quasar rather than a gravitational lens. VLA observations at 3.6 cm reveal emission from the lens galaxy at the flux level of 1 mJy and a marginal detection of the brighter quasar.

Original language	English (US)
Pages (from-to)	769-774
Number of pages	6
Journal	Astrophysical Journal
Volume	546
Issue number	2 PART 1
DOIs	https://doi.org/10.1086/318322
State	Published - Jan 10 2001

Keywords

Gravitational lensing

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/318322

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title = "Multifrequency analysis of the new wide-separation gravitational lens candidate RX J0921 + 4529",

abstract = "We report the discovery of a new two-image gravitational lens candidate. The system RX J0921 + 4529 contains two zs = 1.66 quasars separated by 6″.93 with an H-band magnitude difference of Δm = 1.39. The HST NIC2 H-band images reveal an H = 18.2 spiral galaxy between the quasar images, which is probably a member of a zl = 0.32 X-ray cluster centered on the field. We detect an extended source near the fainter quasar image but not in the brighter image. If this extended source is the host galaxy of the fainter quasar, then the system is a binary quasar rather than a gravitational lens. VLA observations at 3.6 cm reveal emission from the lens galaxy at the flux level of 1 mJy and a marginal detection of the brighter quasar.",

keywords = "Gravitational lensing",

author = "Mu{\~n}oz, {J. A.} and Falco, {E. E.} and Kochanek, {C. S.} and J. Leh{\'a}r and McLeod, {B. A.} and McNamara, {B. R.} and Vikhlinin, {A. A.} and Impey, {C. D.} and Rix, {H. W.} and Keeton, {C. R.} and Peng, {C. Y.} and Mullis, {C. R.}",

year = "2001",

month = jan,

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doi = "10.1086/318322",

language = "English (US)",

volume = "546",

pages = "769--774",

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AU - Muñoz, J. A.

AU - Falco, E. E.

AU - Kochanek, C. S.

AU - Lehár, J.

AU - McLeod, B. A.

AU - McNamara, B. R.

AU - Vikhlinin, A. A.

AU - Impey, C. D.

AU - Rix, H. W.

AU - Keeton, C. R.

AU - Peng, C. Y.

AU - Mullis, C. R.

PY - 2001/1/10

Y1 - 2001/1/10

N2 - We report the discovery of a new two-image gravitational lens candidate. The system RX J0921 + 4529 contains two zs = 1.66 quasars separated by 6″.93 with an H-band magnitude difference of Δm = 1.39. The HST NIC2 H-band images reveal an H = 18.2 spiral galaxy between the quasar images, which is probably a member of a zl = 0.32 X-ray cluster centered on the field. We detect an extended source near the fainter quasar image but not in the brighter image. If this extended source is the host galaxy of the fainter quasar, then the system is a binary quasar rather than a gravitational lens. VLA observations at 3.6 cm reveal emission from the lens galaxy at the flux level of 1 mJy and a marginal detection of the brighter quasar.

AB - We report the discovery of a new two-image gravitational lens candidate. The system RX J0921 + 4529 contains two zs = 1.66 quasars separated by 6″.93 with an H-band magnitude difference of Δm = 1.39. The HST NIC2 H-band images reveal an H = 18.2 spiral galaxy between the quasar images, which is probably a member of a zl = 0.32 X-ray cluster centered on the field. We detect an extended source near the fainter quasar image but not in the brighter image. If this extended source is the host galaxy of the fainter quasar, then the system is a binary quasar rather than a gravitational lens. VLA observations at 3.6 cm reveal emission from the lens galaxy at the flux level of 1 mJy and a marginal detection of the brighter quasar.

KW - Gravitational lensing

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JF - Astrophysical Journal

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Multifrequency analysis of the new wide-separation gravitational lens candidate RX J0921 + 4529

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