Hostname: page-component-76fb5796d-45l2p Total loading time: 0 Render date: 2024-04-29T03:27:52.070Z Has data issue: false hasContentIssue false
  • English
  • Français

Pixel Lensing: The Key to the Universe

Published online by Cambridge University Press:  25 May 2016

Andrew Gould
Andrew Gould*
Affiliation:
Dept of Astronomy, Ohio State University, Columbus, OH 43210 e-mail: gould@payne.mps.ohio-state.edu

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.

Pixel lensing, the gravitational microlensing of unresolved stars, is potentially a powerful method for detecting and measuring microlensing events. Two groups are currently refining this method in observations toward M31. I show that the technique has wide application, from searching for intra-cluster Machos in the Virgo cluster, to improving the accuracy of follow-up observations of Galactic microlensing events, to measuring the star-formation history of the universe. I derive the equation for the pixel lensing event rate where Qmin is the minimum signal to noise for detection, τ is the optical depth, Nres is the number of telescope resolution elements in the field, is the photon detection rate from a fluctuation magnitude star, and ξ is a suppression factor.

Type
Chapter 10: Emerging Applications
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 365 - 370
Copyright
Copyright © Kluwer 1996 

References

Alcock, C., et al., 1993, Nature, 365, 621 Google Scholar
Alcock, C., et al., 1995a, ApJ, 445, 133 CrossRefGoogle Scholar
Allard, C. 1995, IAU Symposium 173 Google Scholar
Aubourg, E., et al., 1993, Nature, 365, 623 Google Scholar
Aubourg, E., et al., 1995, A&A, in press Google Scholar
Baillon, P., Bouquet, A., Giraud-Héraud, Y., & Kaplan, J., 1993 A&A, 277, 1 Google Scholar
Crotts, A. P. S., 1992, ApJ, 399, L4 CrossRefGoogle Scholar
Gould, A., 1994, ApJ, 421, L75 Google Scholar
Gould, A., 1995a, ApJ, 441, L21 Google Scholar
Gould, A., 1995b, ApJ, 455, 000 Google Scholar
Gould, A., 1995c, ApJ, 455, 000 Google Scholar
Han, C. & Gould, A., 1995, ApJ, submitted Google Scholar
Melchior, A.-L., 1995, Thèse, “Recherche de naines brunes par effet de microlentille gravitationnelle par la méthode des pixels. Analyse des données des collaborations AGAPE et EROS.”, Collège de France, Paris Google Scholar
Paczyński, B., 1986, ApJ, 304, 1 CrossRefGoogle Scholar
Paczyński, B., 1995, IAU Symposium 173 Google Scholar
Pratt, M., 1995, IAU Symposium 173 Google Scholar
Refsdal, S., 1966, MNRAS, 134, 315 Google Scholar
Sackett, P., 1995, IAU Symposium 173 Google Scholar
Schechter, P., 1995, IAU Symposium 173 Google Scholar
Tonry, J. L., 1991 ApJ, 373, L1 Google Scholar
Udalski, A., et al., 1994, Acta Astron, 44, 165 Google Scholar