Imaging circumstellar environments with a nulling interferometer

Article Abstract:

Extrasolar planets have to be imaged directly so that their nature can be better understood, but the bright light from the parent star can overwhelm nearby faint sources. A method of selectively removing starlight before detection was proposed by Bracewell, by superposing light from two telescopes so that stellar wavefronts interfere destructively. Mid-infrared observations using two telescopes of the Multiple Mirror Telescope are reported, demonstrating the viability of the technique.

Usage, Telescope, Telescopes, Observations, Planets, Circumstellar matter

---

Interferometric radar measurements of water level changes on the Amazon flood plain

Article Abstract:

Interferometric synthetic aperture radar (SAR) data was used to measure water level changes in flooded areas on the Amazon flood plain. Proximal floodplain observations were in accordance with main-channel gauge records, suggesting the rapid response of the flood plain to falls in river stage.

Floodplains

---

Deep and stable interferometric nulling of broadband light with implications for observing planets around nearby stars

Article Abstract:

Reported here is the deep and stable interferometric nulling of broadband thermal light. An astronomical instrument is constructed as a prototype.

Optical instruments

Similar abstracts:

• Abstracts: Enumerating megapopulations of wild bears with an ingested biomarker. Home ranges of sloth bears in Nepal: implications for conservation
• Abstracts: Imaging of radiocarbon-labelled tracer molecules in neural tissue using accelerator mass spectrometry. Preferential representation of the fovea in the primary visual cortex
• Abstracts: Expanding the circle. Learning from life
• Abstracts: Shattering developments. Use it or lose it. Asymmetric leaves 1 mediates leaf patterning and stem cell function in Arabidopsis
• Abstracts: Excited-state enhancement of optical nonlinearities in linear conjugated molecules. Gigantic optical nonlinearity in one-dimensional Mott-Hubbard insulators

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.