BioParity.UFO / UAP research

32 papers for “Abraham Loeb”

Results

PaperS7715

Natural and Artificial Spectral Edges in Exoplanets

Manasvi Lingam, Abraham Loeb. arxiv.org. May 25, 2017.

Lingam and Loeb propose spectral edges from hypothetical extensive photovoltaic surfaces as possible technosignatures. Contrast and power estimates depend on assumed coverage, reflectivity and geometry. Vegetation, minerals, clouds and ordinary heat transport remain alternatives. The figures combine cited reflectance curves and a schematic orbital scenario. The paper reports no detected extraterrestrial arrays. Historical instrument forecasts, manuscript comments and work-level Starshot support are qualified separately.

All five supplied preprint pages and native layouts; conditional proposal and original gaps
PaperS7738

Fast Radio Bursts from Extragalactic Light Sails

Manasvi Lingam, Abraham Loeb. arxiv.org. February 27, 2017.

Lingam and Loeb consider whether some fast radio bursts could be artificial propulsion beams. The paper presents conditional models and possible tests, explicitly treating the artificial explanation as more speculative than astrophysical alternatives.

Complete supplied v2 text and native layouts; model unreplicated
PaperS7742

Fast radio bursts: the observational case for a Galactic origin

Dan Maoz, Abraham Loeb, Yossi Shvartzvald, Monika Sitek, Michael Engel, Flavien Kiefer, Marcin Kiraga, Amir Levi, Tsevi Mazeh, Michał Pawlak, R. Michael Rich, Lev Tal-Or, Lukasz Wyrzykowski. arxiv.org. September 8, 2015.

Maoz, Loeb and colleagues compare optical variability with historical radio-burst fields and propose stellar counterparts. Their association calculations depend on selection and assumptions; simultaneous counterpart evidence and raw-data replication are missing.

Complete supplied nine-page manuscript; counterpart and version gaps
PaperS7739

SETI via Leakage from Light Sails in Exoplanetary Systems

James Guillochon, Abraham Loeb. arxiv.org. September 3, 2015.

Guillochon and Loeb model possible leakage from hypothetical light-sail propulsion systems. Simulated observing windows depend on assumed inhabited systems and operating choices; the paper supplies no detection or deployed apparatus.

Complete supplied v2 text and native layouts; conditional model
PaperS7735

Detecting industrial pollution in the atmospheres of earth-like exoplanets

Henry W. Lin, Gonzalo Gonzalez Abad, Abraham Loeb. arxiv.org. July 21, 2014.

Lin, Gonzalez Abad and Loeb model whether hypothetical industrial pollutants could be detected in an exoplanet atmosphere. Their exposure forecasts are conditional and supply no detected pollution or civilization.

Supplied preprint text and native layouts; conditional model
PaperS7712

Detection Technique for Artificially-Illuminated Objects in the Outer Solar System and Beyond

Abraham Loeb, Edwin L. Turner. arxiv.org. March 13, 2012.

Loeb and Turner propose tracking brightness changes with distance to help distinguish intrinsic illumination from reflected sunlight. The model requires assumptions about luminosity, geometry, spectrum and albedo. They retain conventional variability from phase, surfaces, outgassing, rotation and binary effects, plus cloud and geometry limitations for exoplanets. Historical telescope forecasts and inconclusive null results limit the proposal. The paper reports no artificial-light detection or replicated experiment.

Complete supplied preprint text and ten native layouts; original-version gaps
PaperS7713

Will the Large Synoptic Survey Telescope Detect Extra-Solar Planetesimals Entering the Solar System?

Amaya Moro-Martín, Edwin L. Turner, Abraham Loeb. arxiv.org. September 14, 2009.

Moro-Martín, Turner and Loeb model ordinary interstellar planetesimals using uncertain stellar populations, ejection, size distributions and albedo. Their historical 2009 forecast for inactive objects gives a conditional lifetime expectation of order 0.0001–0.01, described as about a 0.01%–1% chance of one detection. A larger narrow-size scenario is explicitly unsupported by cited constraints. Figures and tables are theoretical scenarios. Survey selection, activity, disruption and survival limit the forecast. No new detection, artificiality or experimental replication is established.

Complete supplied preprint text and all 29 native layouts; notation and original gaps
PaperS7714

Eavesdropping on Radio Broadcasts from Galactic Civilizations with Upcoming Observatories for Redshifted 21cm Radiation

Abraham Loeb, Matias Zaldarriaga. arxiv.org. November 19, 2006.

Loeb and Zaldarriaga forecast searches for accidental radio leakage with then-proposed astronomical observatories. Detectability depends on bandwidth, observing time, beam direction, duty cycle and interference. The figure and table share historical Earth-emission assumptions. Proposed orbital and habitability inferences were not performed measurements. A hypothetical relay-station private communication is attributed but unavailable. The paper reports no extraterrestrial detection; named funding is distinguished by recipient.

All eight supplied preprint pages and native layouts; journal and original-data gaps

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