Academic Journal
Measuring Cosmological Parameters with the JVAS and CLASS Gravitational Lens Surveys
| العنوان: | Measuring Cosmological Parameters with the JVAS and CLASS Gravitational Lens Surveys |
|---|---|
| المؤلفون: | P. Helbig, R. D. Bl, I. W. A. Browne, A. G. De Bruyn, C. D. Fassnacht, N. Jackson, L. V. E. Koopmans, J. F. Macias-perez, D. R. Marlow, S. T. Myers, R. Quast, D. Rusin, P. N. Wilkinson, E. Xanthopoulos |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://arxiv.org/pdf/astro-ph/9904007v1.pdf. |
| سنة النشر: | 1999 |
| المجموعة: | CiteSeerX |
| الوصف: | Lens All-Sky Survey) are well-defined surveys containing about ten thousand flat-spectrum radio sources. For many reasons, flat-spectrum radio sources are particularly well-suited as a population from which one can obtain unbiased samples of gravitational lenses. These are by far the largest gravitational (macro)lens surveys, and particular attention was paid to constructing a cleanly-defined sample for the survey itself and for the underlying luminosity function. Here we present the constraints on cosmological parameters, particularly the cosmological constant, derived from JVAS and combine them with constraints from optical gravitational lens surveys, ‘direct ’ measurements of Ω0, H0 and the age of the universe, and constraints derived from CMB anisotropies, before putting this final result into the context of the latest results from other, independent cosmological tests. 1. Cosmological constraints from JVAS. The Jodrell Bank-VLA Astrometric Survey (JVAS) is a survey for flat-spectrum radio sources with a flux density greater than 200mJy at 5GHz. Flat-spectrum radio sources are likely to be compact, thus making it easy to recognise the lensing morphology. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.255.8505; http://arxiv.org/pdf/astro-ph/9904007v1.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.255.8505 http://arxiv.org/pdf/astro-ph/9904007v1.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.5C814F04 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |