We combed the Koch snowflake fractal antennae in calibre design of Five-hundred-meter Aperture Spherical radio Telescope (FAST), building a conjecture of a second-order fractal primary reflectors to optimize the orientated […]
astro-ph.IM
Posted inSETI & Technosignatures
Searching For Interstellar Quantum Communications
The modern search for extraterrestrial intelligence (SETI) began with the seminal publications of Cocconi & Morrison (1959) and Schwartz & Townes (1961), who proposed to search for narrow-band signals in […]
Posted inAriel Mission, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Ariel: Enabling Planetary Science Across Light-years
Ariel, the Atmospheric Remote-sensing Infrared Exoplanet Large-survey, was adopted as the fourth medium-class mission in ESA’s Cosmic Vision programme to be launched in 2029.
Posted inExoplanets, -moons, -comets
Improved Contrast in Images of Exoplanets using Direct SNR Optimization
Direct imaging of exoplanets is usually limited by quasi-static speckles. These uncorrected aberrations in a star’s point spread function (PSF) obscure faint companions and limit the sensitivity of high-contrast imaging […]
Posted inExoplanets, -moons, -comets
Exoplanet Detection in Starshade Images
A starshade suppresses starlight by a factor of 1E11 in the image plane of a telescope, which is crucial for directly imaging Earth-like exoplanets. The state of the art in […]
Posted inHabitable Zones
Near Real-time Precipitable Water Vapour Monitoring For Correcting Near-infrared Observations Using Satellite Remote Sensing
In the search for small exoplanets orbiting cool stars whose spectral energy distributions peak in the near infrared, the strong absorption of radiation in this region due to water vapour […]
Posted inAnalog Studies, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Desert Worlds, Exploration Gear & Tech, Habitable Zones, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry
Two Decades of km-resolution Satellite- And Ground-based Measurements of the Precipitable Water Vapor in the Atacama Desert
The Atacama Desert has long been established as an excellent site for submillimeter observations. Yet identifying potentially optimal locations for a new facility within this region can require long field […]
Posted inSETI & Technosignatures
Longevity Is The Key Factor In The Search For Technosignatures
It is well-known that the chances of success of SETI depend on the longevity of technological civilizations or, more broadly, on the duration of the signs of their existence, or […]
Posted inAstrochemistry
2-aminooxazole In Astrophysical Environments: IR Spectra And Destruction Cross Sections For Energetic Processing
2-aminooxazole (2AO), a N-heterocyclic molecule, has been proposed as an intermediate in prebiotic syntheses. It has been demonstrated that it can be synthesized from small molecules such as cyanamide and […]
Posted inSETI & Technosignatures
The Copernican Principle Rules Out BLC1 as a Technological Radio Signal from the Alpha Centauri System
Without evidence for occupying a special time or location, we should not assume that we inhabit privileged circumstances in the Universe. As a result, within the context of all Earth-like […]