Results 81 to 90 of about 588 (145)

Using Anomaly Detection to Search for Technosignatures in Breakthrough Listen Observations

open access: yesThe Astronomical Journal
We implement a machine learning algorithm to search for extraterrestrial technosignatures in radio observations of several hundred nearby stars, obtained with the Parkes and Green Bank Telescopes by the Breakthrough Listen collaboration.
Snir Pardo   +4 more
doaj   +1 more source

The Challenge of Detecting Remote Spectroscopic Signatures from Radionuclides

open access: yesThe Astrophysical Journal
The characterization of exoplanetary atmospheres through transit spectra is becoming increasingly feasible, and technology for direct detection remains ongoing.
Jacob Haqq-Misra   +2 more
doaj   +1 more source

Exoplanet Occultations as Technosignature Targets

open access: yes, 2021
Recent SETI surveys have increased the fraction of the cosmic haystack that has been analyzed by focusing on increasing the number of studied target systems and the total time each target is observed. However, few of these surveys have considered when is best to observe their targets; often instead relying on the assumption that technosignature targets
openaire   +1 more source

A Model-independent Radio Telescope Dark Matter Search in the L and S Bands

open access: yesThe Astrophysical Journal Letters
Ultralight bosonic dark matter in its most general form can be detected through its decay or annihilation to a quasimonochromatic radio line. Assuming only that this line is consistent with the most general properties of the expected phase space of our ...
Aya Keller   +2 more
doaj   +1 more source

Multibeam SETI Observations Toward Nearby M Dwarfs with FAST

open access: yesThe Astronomical Journal
The search for extraterrestrial intelligence (SETI) targeted searches aim to observe specific areas and objects to find possible technosignatures. Many SETI researches have focused on nearby stars and their planets in recent years.
Xiao-Hang Luan   +5 more
doaj   +1 more source

Ground to Dust: Collisional Cascades and the Fate of Kardashev II Megaswarms

open access: yesThe Astrophysical Journal
Extraterrestrial intelligences are speculated to surround stars with structures to collect their energy or to signal distant observers. If they exist, these most likely are megaswarms, vast constellations of satellites (elements) in orbit around the ...
Brian C. Lacki
doaj   +1 more source

Dual-backend Multibeam Position-switching Targeted SETI Observations toward Nearby Active Planet-hosting Systems with FAST

open access: yesThe Astronomical Journal
The Five-hundred-meter Aperture Spherical Telescope (FAST), the world’s largest single-dish radio telescope, lists the search for extraterrestrial intelligence (SETI) as one of its key scientific objectives.
Jian-Kang Li   +3 more
doaj   +1 more source

Origin of Life on Mars: Suitability and Opportunities. [PDF]

open access: yesLife (Basel), 2021
Clark BC   +8 more
europepmc   +1 more source

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