Search for Low-Mass Exoplanets by Gravitational Microlensing at High Magnification-Reference-Cited by-同舟云学术

Search for Low-Mass Exoplanets by Gravitational Microlensing at High Magnification

Published:2004-08-27 Issue:5688 Volume:305 Page:1264-1266
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Abe F.¹²³⁴⁵,Bennett D. P.¹²³⁴⁵,Bond I. A.¹²³⁴⁵,Eguchi S.¹²³⁴⁵,Furuta Y.¹²³⁴⁵,Hearnshaw J. B.¹²³⁴⁵,Kamiya K.¹²³⁴⁵,Kilmartin P. M.¹²³⁴⁵,Kurata Y.¹²³⁴⁵,Masuda K.¹²³⁴⁵,Matsubara Y.¹²³⁴⁵,Muraki Y.¹²³⁴⁵,Noda S.¹²³⁴⁵,Okajima K.¹²³⁴⁵,Rakich A.¹²³⁴⁵,Rattenbury N. J.¹²³⁴⁵,Sako T.¹²³⁴⁵,Sekiguchi T.¹²³⁴⁵,Sullivan D. J.¹²³⁴⁵,Sumi T.¹²³⁴⁵,Tristram P. J.¹²³⁴⁵,Yanagisawa T.¹²³⁴⁵,Yock P. C. M.¹²³⁴⁵,Gal-Yam A.¹²³⁴⁵,Lipkin Y.¹²³⁴⁵,Maoz D.¹²³⁴⁵,Ofek E. O.¹²³⁴⁵,Udalski A.¹²³⁴⁵,Szewczyk O.¹²³⁴⁵,ZÌebrunÌ K.¹²³⁴⁵,SoszynÌski I.¹²³⁴⁵,SzymanÌski M. K.¹²³⁴⁵,Kubiak M.¹²³⁴⁵,PietrzynÌski G.¹²³⁴⁵,Wyrzykowski L.¹²³⁴⁵

Affiliation:

1. Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-01, Japan.

2. Department of Physics, Notre Dame University, Notre Dame IN 46556, USA.

3. Institute of Information and Mathematical Sciences, Massey University at Albany, Auckland, New Zealand.

4. Department of Physics and Astronomy, University of Canterbury, Christchurch, New Zealand.

5. National Astronomical Observatory, Tokyo, Japan.

Abstract

Observations of the gravitational microlensing event MOA 2003-BLG-32/OGLE 2003-BLG-219 are presented, for which the peak magnification was over 500, the highest yet reported. Continuous observations around the peak enabled a sensitive search for planets orbiting the lens star. No planets were detected. Planets 1.3 times heavier than Earth were excluded from more than 50% of the projected annular region from approximately 2.3 to 3.6 astronomical units surrounding the lens star, Uranus-mass planets were excluded from 0.9 to 8.7 astronomical units, and planets 1.3 times heavier than Saturn were excluded from 0.2 to 60 astronomical units. These are the largest regions of sensitivity yet achieved in searches for extrasolar planets orbiting any star.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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