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Imaging of SDSS z > 6 quasar fields: Gravitational lensing, companion galaxies, and the host dark matter halos

Abstract:

We have undertaken deep optical imaging observations of three 6.2 < z < 6.5 quasar fields in the i′ and z′ filters. These data are used to search for foreground galaxies that are gravitationally lensing the quasars and distant galaxies physically associated with the quasars. Foreground galaxies are found closer than 5″ to the lines of sight of two of the three quasars. However, the faintness of these galaxies suggests that they have fairly low masses and provide only weak magnifications...

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Publisher copy:
10.1086/430168

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Publisher:
Institute of Physics Publishing
Journal:
Astrophysical Journal
Volume:
626
Issue:
2 I
Pages:
657-665
Publication date:
2005-06-20
DOI:
EISSN:
1538-4357
ISSN:
0004-637X
URN:
uuid:7a1425c6-c2e9-430c-9c0f-30908bdbb10a
Source identifiers:
335535
Local pid:
pubs:335535

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