Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Lacki, Brian C"'
Autor:
Lacki, Brian C.
Publikováno v:
ApJ 966, 183 (2024)
The search for extraterrestrial intelligence includes efforts to constrain populations of artificial broadcasts in other galaxies. Previous efforts use individualist methods, searching for single broadcasts with high signal-to-noise ratio. These woul
Externí odkaz:
http://arxiv.org/abs/2405.04651
Autor:
Lacki, Brian C.
Publikováno v:
ApJ 966, 182 (2024)
Artificial broadcasts from extraterrestrial intelligences (ETIs) are a hypothetical class of celestial phenomena. Unlike known astrophysical objects, the societies that generate them may be able to replicate on galactic scales through interstellar tr
Externí odkaz:
http://arxiv.org/abs/2405.04646
Autor:
Gajjar, Vishal, LeDuc, Dominic, Chen, Jiani, Siemion, Andrew P. V., Sheikh, Sofia Z., Brzycki, Bryan, Croft, Steve, Czech, Daniel, DeBoer, David, DeMarines, Julia, Drew, Jamie, Isaacson, Howard, Lacki, Brian C., Lebofsky, Matt, MacMahon, David H. E., Ng, Cherry, de Pater, Imke, Perez, Karen I., Price, Danny C., Suresh, Akshay, Webb, Claire, Worden, S. Pete
The search for extraterrestrial intelligence at radio frequencies has largely been focused on continuous-wave narrowband signals. We demonstrate that broadband pulsed beacons are energetically efficient compared to narrowband beacons over longer oper
Externí odkaz:
http://arxiv.org/abs/2205.02964
Autor:
Smith, Shane, Price, Danny C, Sheikh, Sofia Z, Czech, Daniel J, Croft, Steve, DeBoer, David, Gajjar, Vishal, Isaacson, Howard, Lacki, Brian C, Lebofsky, Matt, MacMahon, David HE, Ng, Cherry, Perez, Karen I, Siemion, Andrew PV, Webb, Claire Isabel, Drew, Jamie, Worden, S Pete, Zic, Andrew
Publikováno v:
Nature Astronomy, vol 5, pgs 1148-1152 (2021)
The detection of life beyond Earth is an ongoing scientific endeavour, with profound implications. One approach, known as the search for extraterrestrial intelligence (SETI), seeks to find engineered signals (`technosignatures') that indicate the exi
Externí odkaz:
http://arxiv.org/abs/2111.08007
Autor:
Sheikh, Sofia Z., Smith, Shane, Price, Danny C., DeBoer, David, Lacki, Brian C., Czech, Daniel J., Croft, Steve, Gajjar, Vishal, Isaacson, Howard, Lebofsky, Matt, MacMahon, David H. E., Ng, Cherry, Perez, Karen I., Siemion, Andrew P. V., Webb, Claire Isabel, Zic, Andrew, Drew, Jamie, Worden, S. Pete
The aim of the search for extraterrestrial intelligence (SETI) is to find technologically-capable life beyond Earth through their technosignatures. On 2019 April 29, the Breakthrough Listen SETI project observed Proxima Centauri with the Parkes 'Murr
Externí odkaz:
http://arxiv.org/abs/2111.06350
Autor:
Lacki, Brian C.
Publikováno v:
International Journal of Astrobiology, 22, 354-398 (2023)
Typicality arguments attempt to use the Copernican Principle to draw conclusions about the cosmos and presently unknown conscious beings within it, including extraterrestrial intelligences (ETI). The most notorious is the Doomsday Argument, which pur
Externí odkaz:
http://arxiv.org/abs/2106.07738
Autor:
Lacki, Brian C.
Publikováno v:
International Journal of Astrobiology 20 (2021) 359-376
Interstellar travel in the Milky Way is commonly thought to be a long and dangerous enterprise, but are all galaxies so hazardous? I introduce the concept of galactic traversability to address this question. Stellar populations are one factor in trav
Externí odkaz:
http://arxiv.org/abs/2106.07739
Autor:
Gajjar, Vishal, Perez, Karen I., Siemion, Andrew P. V., Foster, Griffin, Brzycki, Bryan, Chatterjee, Shami, Chen, Yuhong, Cordes, James M., Croft, Steve, Czech, Daniel, DeBoer, David, DeMarines, Julia, Drew, Jamie, Gowanlock, Michael, Isaacson, Howard, Lacki, Brian C., Lebofsky, Matt, MacMahon, David H. E., Morrison, Ian S., Ng, Cherry, de Pater, Imke, Price, Danny C., Sheikh, Sofia Z., Suresh, Akshay, Webb, Claire, Worden, S. Pete
A line-of-sight towards the Galactic Center (GC) offers the largest number of potentially habitable systems of any direction in the sky. The Breakthrough Listen program is undertaking the most sensitive and deepest targeted SETI surveys towards the G
Externí odkaz:
http://arxiv.org/abs/2104.14148
Autor:
Lacki, Brian C.
Publikováno v:
ApJ 919, 8 (2021)
Elliptical galaxies have dynamically hot ($\sigma_{1D}$ ~ 100 -- 300 km s$^{-1}$) populations of stars, and presumably, smaller objects like comets. Because interstellar minor bodies are moving much faster, they hit planets harder and more often than
Externí odkaz:
http://arxiv.org/abs/2101.11833
Autor:
Faber, Jakob T., Gajjar, Vishal, Siemion, Andrew P. V., Croft, Steve, Czech, Daniel, DeBoer, David, DeMarines, Julia, Drew, Jamie, Isaacson, Howard, Lacki, Brian C., Lebofsky, Matt, MacMahon, David H. E., Ng, Cherry, de Pater, Imke, Price, Danny C., Sheikh, Sofia Z., Webb, Claire, Worden, S. Pete
We report polarization properties for eight narrowband bursts from FRB 121102 that have been re-detected in a high-frequency (4-8 GHz) Breakthrough Listen observation with the Green Bank Telescope, originally taken on 2017 August 26. The bursts were
Externí odkaz:
http://arxiv.org/abs/2101.05172