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: http www.astronomy.ru forum index.php topic 4644.0.html
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