Is B1422+231 a "Golden Lens"? | Zendy

Somak Raychaudhury | Zendy; Prasenjit Saha | Zendy; Liliya L. R. Williams | Zendy

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Is B1422+231 a "Golden Lens"?

Author(s) -

Somak Raychaudhury,

Prasenjit Saha,

Liliya L. R. Williams

Publication year - 2003

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/375326

Subject(s) - astrophysics , physics , galaxy , velocity dispersion , lens (geology) , galaxy group , weak gravitational lensing , gravitational lens , astronomy , radio galaxy , optics , redshift

B1422+231 is a quadruply-imaged QSO with an exceptionally large lensingcontribution from group galaxies other than the main lensing galaxy. We detectdiffuse X-rays from the galaxy group in archival Chandra observations; theinferred temperature is consistent with the published velocity dispersion. Wethen explore the range of possible mass maps that would be consistent with theobserved image positions, radio fluxes, and ellipticities. Under plausible butnot very restrictive assumptions about the lensing galaxy, predicted timedelays involving the faint fourth image are fairly well constrained around 7/hdays.Comment: 17 pages, 9 figures, to appear in the June/03 issue of A

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