Microlensing Observations in Astrophysics

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This article is about the MOA observatory project. For the astrophysical process, see Gravitational microlensing.

Mount John Observatory
.

Microlensing Observations in Astrophysics (MOA) is a collaborative project between researchers in New Zealand

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

  • Underside of main mirror
    Underside of main mirror
  • Camera assembly
    Camera assembly
  • Main mirror, side view
    Main mirror, side view

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

  1. Caltech
    . Retrieved 3 October 2020.
  2. arXiv:1510.05688
    .
  3. ISBN 978-3-642-27833-4. Retrieved 3 October 2020. {{cite book}}: |work= ignored (help
    )
  4. S2CID 118776894
    . Retrieved 3 October 2020.
  5. ^ Gough, Evan (1 October 2020). "A Rogue Earth-Mass Planet Has Been Discovered Freely Floating in the Milky Way Without a Star". Universe Today. Retrieved 2 October 2020.
  6. S2CID 221971000
    .
  7. S2CID 246430448
    .
  8. S2CID 246608178
    .
  9. ^ Gianopoulos, Andrea (7 June 2022). "Hubble Determines Mass of Isolated Black Hole Roaming Milky Way". NASA. Retrieved 12 June 2022.
  10. ^ O'Callaghan, Jonathan. "Astronomers Find First Ever Rogue Black Hole Adrift in the Milky Way". Scientific American. Retrieved 8 February 2022.
  11. S2CID 44193135
    .
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