Results 61 to 70 of about 836 (165)
The Astrophysical Journal, 2023 I apply the thermodynamics of radiation to Dyson spheres as machines that do work or computation and examine their observational consequences. I identify four properties of Dyson spheres that complicate typical analyses: globally, they may do no work in ...
Jason T. Wright
doaj +1 more source
Technosignatures in the Thermal Infrared
, 2019 WISE, Gaia, and JWST provide an opportunity to compute the first robust upper limits on the energy supplies of extraterrestrial civilizations, both for stars in the Galaxy (Kardashev Type II civilizations) and for other galaxies (Kardashev Type III civilizations). Together, they allow for a nearly-complete catalog of nearby stars with infrared excesses,
Wright, Jason T. +2 more
openaire +2 more sources
Dependence of Biological Activity on the Surface Water Fraction of Planets
, 2019 One of the unique features associated with the Earth is that the fraction of its surface covered by land is comparable to that spanned by its oceans and other water bodies.
Lingam, Manasvi, Loeb, Abraham
core +1 more source
A Search for Extraterrestrial Technosignatures in Archival FAST Survey Data Using a New Procedure
The Astronomical Journal, 2023 The search for extraterrestrial intelligence (SETI) commensal surveys aim to scan the sky to find possible technosignatures from an extraterrestrial intelligence (ETI). The mitigation of radio frequency interference (RFI) is an important step, especially
Yu-Chen Wang +6 more
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The Puzzle of Meteoritic Minerals Heideite and Brezinaite; Are they Iron-based Superconductors? Are they Technosignatures? [PDF]
, 2022 B.P. Embaid
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Technosignature Search with the Allen Telescope Array
, 2022 Abstract: SETI surveys have been typically conducted at lower frequencies, i.e., less than 1.5 GHz. Utilizing the new hardware upgrades and the newly deployed Digital Signal Processing (DSP) backend of the Allen Telescope Array (ATA), we present an ongoing SETI survey of over 300 stars selected from the REsearch Consortium On Nearby Stars (RECONS ...
Premnath, Pranav, Farah, Wael
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The Astronomical JournalThe search for extraterrestrial intelligence at radio frequencies has focused on spatial filtering as a primary discriminant from terrestrial interference.
Bryan Brzycki +9 more
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Nine axes of merit for technosignature searches [PDF]
International Journal of Astrobiology, 2019 AbstractIt can be difficult to develop an effective and balanced search strategy in SETI, especially from a funding perspective, given the diverse methodologies and myriad orthogonal proposals for the best technosignatures. Here I propose a framework to compare the relative advantages and disadvantages of various proposed technosignatures based on nine
openaire +2 more sources
Astro2020 Project White Paper: The Cosmic Accelerometer [PDF]
, 2019 We propose an experiment, the Cosmic Accelerometer, designed to yield velocity precision of $\leq 1$ cm/s with measurement stability over years to decades.
Bentz, Misty +17 more
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Multiverse Predictions for Habitability: Fraction of Life that Develops Intelligence
, 2019 Do mass extinctions affect the development of intelligence? If so, we may expect to be in a universe that is exceptionally placid. We consider the effects of impacts, supervolcanoes, global glaciations, and nearby gamma ray bursts, and how their rates ...
Sandora, McCullen
core +1 more source