MEDI: An instrument for direct-detection of massive extrasolar planets

Melanie Freed, Laird M Close, Donald W Mccarthy, Matthew Rademacher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have developed an instrument, MEDI (Massive Exoplanet Differential Imager), that takes advantage of a unique method of starlight rejection, simultaneous differential imaging, in order to directly image massive planets around nearby stars. Using this technique we expect to achieve suppression of starlight to the photon-noise limit, which means that increased exposure time will translate into higher sensitivities. This is in contrast to past sequential and two-color simultaneous studies that reach a sensitivity floor due to speckle-noise limitations. MEDI is currently installed in ARIES, the infrared camera that will be commissioned at the newly refurbished 6.5m MMT in January 2003, with the world's first adaptive secondary. This should allow us to take Nyquist sampled, diffraction-limited images in the near-IR. The adaptive secondary will also give us unprecedented throughput while minimizing the thermal background and providing a smooth PSF. Based on lab results, we expect to be able to detect objects 106 times fainter than their primaries at 0.5″ separations in 2 hours, limited only by photon noise. This suggests that we will be sensitive to objects with masses as small as ∼ 5 MJupiter at separations of greater than ∼ 5 AU for G2 V stars that are ∼ 300 Myr old and within about 10 pc. Therefore, we will probe a unique search space compared with current radial velocity methods, which are so far restricted to close-in (< 6 AU) orbits.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsP.L. Wizinowich, D. Bonaccini
Pages1132-1141
Number of pages10
Volume4839
Edition2
DOIs
StatePublished - 2002
EventAdaptive Optical System Technologies II - Waikoloa, HI, United States
Duration: Aug 22 2002Aug 26 2002

Other

OtherAdaptive Optical System Technologies II
CountryUnited States
CityWaikoloa, HI
Period8/22/028/26/02

Fingerprint

Extrasolar planets
extrasolar planets
Image sensors
Stars
Photons
Planets
Speckle
stars
Orbits
Diffraction
sensitivity
Cameras
Throughput
photons
Color
Infrared radiation
Imaging techniques
rejection
radial velocity
planets

Keywords

  • Adaptive Optics
  • Binaries
  • Extrasolar Planets
  • Instrumentation
  • Polarimetry

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Freed, M., Close, L. M., Mccarthy, D. W., & Rademacher, M. (2002). MEDI: An instrument for direct-detection of massive extrasolar planets. In P. L. Wizinowich, & D. Bonaccini (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (2 ed., Vol. 4839, pp. 1132-1141) https://doi.org/10.1117/12.459473

MEDI : An instrument for direct-detection of massive extrasolar planets. / Freed, Melanie; Close, Laird M; Mccarthy, Donald W; Rademacher, Matthew.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / P.L. Wizinowich; D. Bonaccini. Vol. 4839 2. ed. 2002. p. 1132-1141.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Freed, M, Close, LM, Mccarthy, DW & Rademacher, M 2002, MEDI: An instrument for direct-detection of massive extrasolar planets. in PL Wizinowich & D Bonaccini (eds), Proceedings of SPIE - The International Society for Optical Engineering. 2 edn, vol. 4839, pp. 1132-1141, Adaptive Optical System Technologies II, Waikoloa, HI, United States, 8/22/02. https://doi.org/10.1117/12.459473
Freed M, Close LM, Mccarthy DW, Rademacher M. MEDI: An instrument for direct-detection of massive extrasolar planets. In Wizinowich PL, Bonaccini D, editors, Proceedings of SPIE - The International Society for Optical Engineering. 2 ed. Vol. 4839. 2002. p. 1132-1141 https://doi.org/10.1117/12.459473
Freed, Melanie ; Close, Laird M ; Mccarthy, Donald W ; Rademacher, Matthew. / MEDI : An instrument for direct-detection of massive extrasolar planets. Proceedings of SPIE - The International Society for Optical Engineering. editor / P.L. Wizinowich ; D. Bonaccini. Vol. 4839 2. ed. 2002. pp. 1132-1141
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