Results 91 to 100 of about 9,504 (208)

At what wavelengths should we search for signals from extraterrestrial intelligence? (SETI/infrared communication/interstellar communication/extraterrestrial intelligence) [PDF]

Searches for extraterrestrial intelligence concentrate on attempts to receive signals in the microwave region, the argument being given that communication occurs there at minimum broadcasted power.
Townes, C. H.
core   +1 more source

Detecting Extraterrestrial Civilizations that Employ an Earth-level Deep Space Network

The Astrophysical Journal Letters
A major aspect of the search for extraterrestrial intelligence (SETI) involves searching for electromagnetic transmissions from extraterrestrial sources, often using our own transmissions as a guide.
Pinchen Fan, Jason T. Wright, T. Joseph W. Lazio   +2 more
doaj   +1 more source

Can Collimated Extraterrestrial Signals be Intercepted?

, 2014
The Optical Search for Extraterrestrial Intelligence (OSETI) attempts to detect collimated, narrowband pulses of electromagnetic radiation. These pulses may either consist of signals intentionally directed at the Earth, or signals between two star ...
Forgan, Duncan H.
core  

Life in a Random Universe: Sciama's Argument Reconsidered

The Astrophysical Journal
Random sampling in high dimensions has successfully been applied to phenomena as diverse as nuclear resonances, neural networks, and black hole evaporation. Here we revisit an elegant argument by the British physicist Dennis Sciama, who demonstrated that
Zhi-Wei Wang, Samuel L. Braunstein
doaj   +1 more source

An Improved Machine Learning Approach for Radio Frequency Interference Mitigation in FAST–SETI Survey Archival Data

The Astronomical Journal
The search for extraterrestrial intelligence (SETI) commensal surveys aim to scan the sky to detect technosignatures from extraterrestrial life. A major challenge in SETI is the effective mitigation of radio frequency interference (RFI), a critical step ...
Li-Li Zhao, Xiao-Hang Luan, Xin Chao, Yu-Chen Wang, Jian-Kang Li, Zhen-Zhao Tao, Tong-Jie Zhang, Hong-Feng Wang, Dan Werthimer   +8 more
doaj   +1 more source

SETI low-frequency feed design study for DSS 24 [PDF]

The Search for Extraterrestrial Intelligence Sky Survey project requires operation from 1 to 10 GHz on the beam waveguide (BWG) antenna DSS 24. The BWG reflectors are undersized in the 1- to 3.02-GHz range, resulting in poor performance. Horn designs and
Lee, P. R., Stanton, P. H.
core   +1 more source

The Breakthrough Listen Search for Extraterrestrial Intelligence

, 2019
Astronomy and Astrophysics Decadal Survey 2020, APC white paper, To be published in ...
Gajjar, Vishal, Siemion, Andrew, Croft, Steve, Brzycki, Bryan, Burgay, Marta, Carozzi, Tobia, Concu, Raimondo, Czech, Daniel, DeBoer, David, DeMarines, Julia, Drew, Jamie, Enriquez, J. Emilio, Fawcett, James, Gallagher, Peter, Garrett, Michael, Gizani, Nectaria, Hellbourg, Greg, Holder, Jamie, Isaacson, Howard, Kudale, Sanjay, Lacki, Brian, Lebofsky, Matthew, Li, Di, MacMahon, David H. E., McCauley, Joe, Melis, Andrea, Molinari, Emilio, Murphy, Pearse, Perrodin, Delphine, Pilia, Maura, Price, Danny C., Webb, Claire, Werthimer, Dan, Williams, David, Worden, Pete, Zarka, Philippe, Zhang, Yunfan Gerry   +36 more
openaire   +2 more sources

SETI@home: Data Analysis and Findings

The Astronomical Journal
SETI@home is a radio Search for Extraterrestrial Intelligence (SETI) project that looks for technosignatures in data recorded at the Arecibo Observatory.
David P. Anderson, Eric J. Korpela, Dan Werthimer, Jeff Cobb, Bruce Allen   +4 more
doaj   +1 more source

Project OASIS: The Design of a Signal Detector for the Search for Extraterrestrial Intelligence [PDF]

An 8 million channel spectrum analyzer (MCSA) was designed the meet to meet the needs of a SETI program. The MCSA puts out a very large data base at very high rates.
Dixon, R., Healy, T., Lord, S.
core   +1 more source

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

The 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