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

Autor:	Grzegorz Pietrzyński, Koki Kamiya, Kimiaki Masuda, Igor Soszyński, Y. Kurata, P. J. Tristram, Philip Yock, O. Szewczyk, Andrzej Udalski, Michał K. Szymański, D. Maoz, Yutaka Matsubara, David P. Bennett, Nicholas J. Rattenbury, Eran O. Ofek, M. Kubiak, T. Sekiguchi, Y. M. Lipkin, A Rakich, Lukasz Wyrzykowski, Yasushi Muraki, K. Okajima, K. Zebrun, S. Eguchi, S. Noda, Takahiro Sumi, Fumio Abe, John B. Hearnshaw, Y. Furuta, Avishay Gal-Yam, T. Yanagisawa, Denis J. Sullivan, Ian A. Bond, P. M. Kilmartin, Takashi Sako
Rok vydání:	2004
Předmět:	Physics Multidisciplinary 010308 nuclear & particles physics Astrophysics (astro-ph) Astronomical unit FOS: Physical sciences Astronomy Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Planetary system Gravitational microlensing 01 natural sciences Exoplanet Astronomical system of units 13. Climate action Planet Saturn 0103 physical sciences Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Planetary mass Astrophysics::Galaxy Astrophysics
Zdroj:	Science. 305:1264-1266
ISSN:	1095-9203 0036-8075
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93072cdf28bd3758498b7ce434b80c56 https://doi.org/10.1126/science.1100714 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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