Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-28T00:22:03.807Z Has data issue: false hasContentIssue false
  • English
  • Français

Astrometric microlensing with the RadioAstron space mission

Published online by Cambridge University Press:  01 October 2007

A. F. Zakharov
A. F. Zakharov*
Affiliation:
National Astronomical Observatories of Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya, 25, 117259, Moscow, Russia Center of Advanced Mathematics and Physics, National University of Sciences and Technology, Rawalpindi, Pakistan Bogoliubov Laboratory for Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

According to a revised schedule of the Russian Space Agency, in October 2008 the 10 m space telescope RadioAstron will be launched in a high eccentric orbit around the Earth. Acting together with ground based radio telescopes, the VLBI interferometer with a ground-space arm will operate. The interferometer will have extraordinary angular resolution of a few microarcsecond (μas) at the shortest wavelength (1.35 cm). Since typical angular scales for gravitational microlensing are at the μas level for cosmological locations of sources and microlenses, in principle there is a chance to resolve microimages and (or) at least, detect astrometrical shift of bright point like images. In particular, gravitationally lensed systems, such as B1600+434, where in radio band a signature of microlensing is found, look suitable for direct observations of microlensing, since microlensing with the RadioAstron interferometer may be detected in the future (considering its high angular resolution and a relatively high sensitivity and assuming a ground support by the advanced radio telescopes).

Keywords

gravitational lensingtechniques: high angular resolutionastrometryinstrumentation: high angular resolutioninstrumentation: interferometers
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 387 - 390
Copyright
Copyright © International Astronomical Union 2008

References

Koopmans, L. V. E., & de Bruyn, A. G., 2000, A&A, 358, 793Google Scholar
Popović, L. C.Jovanović, P., Mediavilla, E., et al. ApJ, 2006, 637, 620CrossRefGoogle Scholar
Treyer, M. & Wambsganss, J., 2004, A&A, 416, 19Google Scholar
Zakharov, A. F., 1995, A & A, 293, 1Google Scholar
Zakharov, A. F., 1997a, Ap & SS, 252, 369CrossRefGoogle Scholar
Zakharov, A. F., 1997b, Gravitational Lensing and Microlensing, Janus-K, MoscowGoogle Scholar
Zakharov, A. F., 2003, Publ. Astron. Obs. Belgrade 75, 27; astro-ph/0212009Google Scholar
Zakharov, A. F., 2005, in Studenikin, A.I. (ed.), Proc. of the Eleven Lomonosov Conference on Elementary Particle Physics, (World Scientific, Singapore) p. 106; astro-ph/0403619Google Scholar
Zakharov, A. F., 2006a, Astron. Reports, 50, 79CrossRefGoogle Scholar
Zakharov, A. F., 2006b, Physics of Particles and Nuclei Lett., (in press); astro-ph/0610857Google Scholar
Zakharov, A. F., Nucita, A. A., De Paolis, F., & Ingrosso, G., 2005a, New Astron., 10, 479CrossRefGoogle Scholar
Zakharov, A. F., Nucita, A. A., De Paolis, F., & Ingrosso, G., 2005b, A & A, 442, 795CrossRefGoogle Scholar
Zakharov, A. F., Popović, L. Č., & Jovanović, P., 2004, A & A, 420, 881CrossRefGoogle Scholar
Zakharov, A. F. & Sazhin, M. V., 1998, Physics-Uspekhi, 41, 945CrossRefGoogle Scholar