A5027641394- Space Science and Extraterrestrial Life
- Gamma-ray bursts and supernovae
- Planetary Science and Exploration
- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Space exploration and regulation
- Astrophysics and Cosmic Phenomena
- Additive Manufacturing and 3D Printing Technologies
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Additive Manufacturing Materials and Processes
- Astrophysical Phenomena and Observations
- Machine Learning in Materials Science
- Geophysics and Gravity Measurements
- Manufacturing Process and Optimization
- Earth Systems and Cosmic Evolution
- Mineral Processing and Grinding
- Advanced Frequency and Time Standards
- Spaceflight effects on biology
- Space Exploration and Technology
- High Entropy Alloys Studies
- Superconducting Materials and Applications
- Astronomical Observations and Instrumentation
- Particle Accelerators and Free-Electron Lasers
University of California, Berkeley
2017-2024
Pennsylvania State University
2019-2024
Search for Extraterrestrial Intelligence
2022-2024
Breakthrough
2023-2024
Texas A&M University
2020-2023
Mitchell Institute
2022
Breakthrough Institute
2022
Breakthrough Listen is the most comprehensive and sensitive search for extraterrestrial intelligence (SETI) to date, employing a collection of international observational facilities including both radio optical telescopes. During first three years program, thousands targets have been observed with Green Bank Telescope (GBT), Parkes Automated Planet Finder. At GBT Parkes, observations performed ranging from 700 MHz 26 GHz, raw data volumes averaging over 1PB / day. A pseudo-real time software...
Abstract A line of sight toward the Galactic Center (GC) offers largest number potentially habitable systems any direction in sky. The Breakthrough Listen program is undertaking most sensitive and deepest targeted SETI surveys GC. Here, we outline our observing strategies with Robert C. Byrd Green Bank Telescope (GBT) Parkes telescope to conduct 600 hr deep observations across 0.7–93 GHz. We report preliminary results from survey for extraterrestrial intelligence (ETI) beacons 1–8 GHz 7.0...
Abstract The intuition suggested by the Drake equation implies that technology should be less prevalent than biology in galaxy. However, it has been appreciated for decades SETI community technosignatures could more abundant, longer-lived, detectable, and ambiguous biosignatures. We collect arguments against technosignatures’ ubiquity discuss implications of some properties technological life fundamentally differ from nontechnological context modern astrobiology: It can spread among stars to...
Abstract The deaths of massive stars are sometimes accompanied by the launch highly relativistic and collimated jets. If jet is pointed towards Earth, we observe a ‘prompt’ gamma-ray burst due to internal shocks or magnetic reconnection events within jet, followed long-lived broadband synchrotron afterglow as interacts with circumburst material. While there solid observational evidence that emission from multiple contributes signature, detailed studies reverse shock, which travels back into...
We present the target selection for Breakthrough Listen search extraterrestrial intelligence during first year of observations at Green Bank Telescope, Parkes Telescope and Automated Planet Finder. On way to observing 1,000,000 nearby stars in technological signals, we three main sets objects plan observe addition a smaller sample exotica. choose 60 nearest stars, all within 5.1 pc from sun. Such offer potential faint radio signals transmitters having power similar those on Earth. add list...
The aim of the search for extraterrestrial intelligence (SETI) is to find technologically-capable life beyond Earth through their technosignatures. On 2019 April 29, Breakthrough Listen SETI project observed Proxima Centauri with Parkes 'Murriyang' radio telescope. These data contained a narrowband signal characteristics broadly consistent technosignature near 982 MHz ('blc1'). Here we present procedure analysis potential technosignatures, in context ubiquity human-generated interference,...
Developing algorithms to search through data efficiently is a challenging part of searching for signs technology beyond our solar system. We have built digital signal processing system and computer cluster on the backend Karl G. Jansky Very Large Array (VLA) in New Mexico order signals throughout Galaxy consistent with understanding artificial radio emissions. In first paper, we described design software pipelines. this describe postprocessing pipeline identify persistent sources...
Abstract The field of Search for Extraterrestrial Intelligence (SETI) searches “technosignatures” could provide the first detection life beyond Earth through technology that an extraterrestrial intelligence may have created. Any given SETI survey, if no technosignatures are detected, should set upper limits based on kinds it been able to detect; sensitivity many requires their target sources (e.g., Dyson spheres or Kardashev II/III level radio transmitters) emit with power far exceeding...
A radio transmitter which is accelerating with a non-zero radial component respect to receiver will produce signal that appears change its frequency over time. This effect, commonly produced in astrophysical situations where orbital and rotational motions are ubiquitous, called drift rate. In SETI (Search for Extraterrestrial Intelligence) research, it unknown priori being sent at, or even if there be any rate at all besides within the solar system. Therefore range of potential rates need...
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 over longer operational timescales. Here, we report the first extensive survey searching such towards 1883 stars as a part of Breakthrough Listen's advanced intelligent life. conducted 233 hours deep observations across 4 8 GHz using Robert C. Byrd Green Bank Telescope and...
Radio searches for extraterrestrial intelligence have mainly targeted the discovery of narrowband continuous-wave beacons and artificially dispersed broadband bursts. Periodic pulse trains, in comparison to above technosignature morphologies, offer an energetically efficient means interstellar transmission. A rotating beacon at Galactic Center (GC), particular, would be highly advantageous galaxy-wide communications. Here, we present blipss, a CPU-based open-source software that uses fast...
Abstract The Breakthrough Listen search for intelligent life is, to date, the most extensive technosignature of nearby celestial objects. We present a radio centers 97 galaxies, observed by at Robert C. Byrd Green Bank Telescope. performed narrowband Doppler drift using turboSETI pipeline with minimum signal-to-noise parameter threshold 10, across rate range ±4 Hz s −1 , spectral resolution 3 and time ∼18.25 s. removed frequency interference (RFI) an on-source/off-source cadence pattern six...
Exoplanetary systems are prime targets for the Search Extraterrestrial Intelligence (SETI). With recent uptick in identification of candidate and confirmed exoplanets through work missions like Transiting Exoplanet Survey Satellite (TESS), we beginning to understand that Earth-like planets common. In this work, extend Breakthrough Listen (BL) search extraterrestrial intelligence include targeted searches stars identified by TESS as potential exoplanet hosts. We report on 113 30-min cadence...
The Breakthrough Listen Initiative, as part of its larger mission, is performing the most thorough technosignature search nearby stars. Additionally, collaborating with scientists working on NASAs Transiting Exoplanet Survey Satellite (TESS), to examine TESS Targets Interest (TOIs) for technosignatures. Here, we present a $1-11$ $\textrm{GHz}$ radio $61$ TOIs that were in transit during their observation at Robert C. Byrd Green Bank Telescope. We performed narrowband Doppler drift minimum...
ABSTRACT FRB 20220912A is a repeating Fast Radio Burst (FRB) that was discovered in Fall 2022 and remained highly active for several months. We report the detection of 35 FRBs from 541 h follow-up observations this source using recently refurbished Allen Telescope Array, covering 1344 MHz bandwidth primarily centred at 1572 MHz. All were detected lower half band with non-detections upper covered fluences 4–431 Jy-ms (median = 48.27 Jy-ms). find consistency previous repeater studies range...
Abstract We report on a search for artificial narrowband signals of 20 stars within the restricted Earth Transit Zone (rETZ) as part ten-year Breakthrough Listen (BL) extraterrestrial intelligence (ETI). The rETZ is region sky from which an observer would see transit Sun with impact parameter less than 0.5. This geometrically unique, providing potential way ETI to discover solar system. targets were nearby (7–143 pc) and covered electromagnetic frequency range 3.95–8.00 GHz. used Robert C....
New radio telescope arrays offer unique opportunities for large-scale commensal SETI surveys. Ethernet-based architectures are allowing multiple users to access data simultaneously by means of multicast Ethernet subscriptions. Breakthrough Listen will take advantage this conducting a survey on the MeerKAT in South Africa. By subscribing raw voltage streams, be able beamform commensally anywhere within field view during primary science observations. The conducted with unprecedented speed...
Abstract The goal of the search for extraterrestrial intelligence (SETI) is detection nonhuman technosignatures, such as technology-produced emission in radio observations. While many have speculated about character SETI fundamentally involves searching signals that not only never been detected, but also a vast range potential morphologies. Given we yet detected signal, must make assumptions their form to develop algorithms. lack positive detections makes it difficult test these algorithms’...
A growing avenue for determining the prevalence of life beyond Earth is to search "technosignatures" from extraterrestrial intelligences/agents. Technosignatures require significant energy be visible across interstellar space and thus intentional signals might concentrated in frequency, time, or space, found mutually obvious places. Therefore, it could advantageous technosignatures parts parameter that are mutually-derivable an observer on a distant transmitter. In this work, we used L-band...
Designing alloys for additive manufacturing (AM) presents significant opportunities, but the chemical composition and processing conditions required printability (ie., their suitability fabrication via AM) are difficult to explore using solely experimental means. In this work, we develop a high-throughput (HTP) computational framework guide search highly printable appropriate parameters. The uses material properties from state-of-the-art databases, parameters, simulated melt pool profiles...
To date, the search for radio technosignatures has focused on sky location as a primary discriminant between technosignature candidates and anthropogenic frequency interference (RFI). In this work, we investigate possibility of searching by identifying presence nature intensity scintillations arising from turbulent, ionized plasma interstellar medium (ISM). Past works have detailed how scattering can both enhance diminish detectability narrowband signals. We use NE2001 Galactic free electron...
ABSTRACT Approximately 8 per cent of the ∼2800 known pulsars exhibit ‘nulling,’ a temporary broad-band cessation normal pulsar emission. Nulling behaviour can be coarsely quantified by nulling fraction, which describes percentage time given will found in null state. In this paper, we perform most thorough statistical analysis thus far properties 141 pulsars. We find weak, non-linear correlations between fraction and pulse width, as well spin period could attributed to selection effects. also...
Abstract We present Breakthrough Listen’s Exotica Catalog as the centerpiece of our efforts to expand diversity targets surveyed in Search for Extraterrestrial Intelligence (SETI). As motivation, we introduce concept survey breadth, objects observed during a program. Several reasons pursuing broad program are given, including increasing chance positive result SETI, commensal astrophysics, and characterizing systematics. The is 963 entry collection 816 distinct intended include “one...