Microlensing Observations in Astrophysics

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File:Dome for MOA telescope.jpg
The Microlensing Observations in Astrophysics (MOA) telescope dome at the top of Mount John Observatory.

Microlensing Observations in Astrophysics (MOA) is a collaborative project between researchers in New Zealand[1] and Japan,[2] led by Professor Yasushi Muraki of Nagoya University.[3] They use microlensing to observe dark matter, extra-solar planets, and stellar atmospheres from the Southern Hemisphere. The group concentrates especially on the detection and observation of gravitational microlensing events of high magnification, of order 100 or more, as these provide the greatest sensitivity to extrasolar planets. They work with other groups in Australia, the United States and elsewhere. Observations are conducted at New Zealand's Mt. John University Observatory using a Template:Convert reflector telescope built for the project.[4]

In September 2020, astronomers using microlensing techniques reported the detection, for the first time, of an earth-mass rogue planet unbounded by any star, and free floating in the Milky Way galaxy.[5][6] In January 2022 in collaboration with Optical Gravitational Lensing Experiment (OGLE) they reported in a preprint the first rogue BH[7][8][9][10] while there have been others candidates[11] this is the most solid detection so far as their technique allowed to measure not only the amplification of light but also its deflection by the BH from the microlensing data.

MOA telescope mirror images

Planets discovered

The following planets have been announced by this survey, some in conjunction with other surveys.

Planet Date announced
MOA-2020-BLG-208Lb October 2022
MOA-2020-BLG-135Lb April 2022
MOA-2014-BLG-472Lb June 2021
MOA-2007-BLG-197Lb May 2015
MOA-2008-BLG-379Lb November 2013
MOA-2011-BLG-322Lb September 2013
MOA-bin-1b May 2012
MOA-2009-BLG-387Lb February 2011
MOA-2007-BLG-400Lb September 18, 2008
MOA-2007-BLG-192Lb May 30, 2008
OGLE-2003-BLG-235b/MOA-2003-BLG-53b April 15, 2004

See also

References

Template:Reflist

External links

Template:Dark matter Template:Exoplanet search projects Template:Portal bar

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