Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/pasa/18_2/mortlock2/paper/index.html
Дата изменения: Fri Apr 8 08:56:25 2016
Дата индексирования: Sun Apr 10 17:06:30 2016
Кодировка:

Поисковые слова: р р р с р с р р р с п п п п п п п п п п п п п п п п п п п п п
The 2dF gravitational lens survey

The 2dF gravitational lens survey

Daniel J. Mortlock, Darren S. Madgwick, Ofer Lahav, PASA, 18 (2), in press.
Next Section: Introduction
Contents Page: Volume 18, Number 2

The 2dF gravitational lens survey

Daniel J. Mortlock1,2
Darren S. Madgwick1
Ofer Lahav1

1 Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom
mortlock@ast.cam.ac.uk, dsm@ast.cam.ac.uk, lahav@ast.cam.ac.uk

2 Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom

Abstract:

The 2 degree Field (2dF) galaxy redshift survey will involve obtaining spectra of approximately

2.5 x 105 objects which have previously been identified as galaxy candidates on morphological grounds. Included in these spectra should be about ten gravitationally-lensed quasars, all with low-redshift galaxies as deflectors (as the more common lenses with high-redshift deflectors will be rejected from the survey as multiple point-sources). The lenses will appear as superpositions of galaxy and quasar spectra, and either cross-correlation techniques or principal components analysis should be able to identify candidates systematically. With the 2dF survey approximately half-completed it is now viable to begin a methodical search for these spectroscopic lenses, and the first steps of this project are described here.

Keywords: surveys - gravitational lensing - methods: data analysis





Welcome... About Electronic PASA... Instructions to Authors
ASA Home Page... CSIRO Publishing PASA
Browse Articles HOME Search Articles
б© Copyright Astronomical Society of Australia 1997
ASKAP
Public