[astro-ph.IM] Astronomical observations include images, spectra, and light curves, while the scientific literature describes these objects in natural language. We present AstroBridge, a framework that connects these observations to an […]
Intelligence & Language
![Grad-CAM autopsy at an amplitude of 4.0. (a) Q2_bright_hit: D1-3 S-shaped, detected. (b) Q2c_bright_mis: D1-1 extreme drift, missed. Columns: input, Grad-CAM map, and CAM difference (injected minus clean). Inputs are shown as the detector sees them: the three ON panels side by side, with frequency running vertically; white lines mark panel boundaries and the green line the injection’s starting channel. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Missed-Detections.png?resize=1200%2C720&ssl=1)
Posted inSETI & Technosignatures
Missed Detections and False Alarms in a CNN Technosignature Detector on Breakthrough Listen Data
[astro-ph.IM] Radio technosignature searches rely on machine learning detectors to shrink the candidate pool before a human looks at it.
![The on-sky geometry of the Anti-Solar Point (ASP), the ecliptic, and the synthesized beams of the ATA-ASP campaign. See the pilot paper by Sheikh and Hort et al. 2026 for full detail [1]. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/A-Technosignature.png?resize=1200%2C719&ssl=1)
Posted inSETI & Technosignatures
A Technosignature Survey Of The Anti-Solar Point: The SETI Institute’s Largest-Ever Campaign With The Allen Telescope Array
[astro-ph.IM] The ATA-ASP campaign is a radio technosignature survey of the Anti-Solar Point as a “Schelling point”, using the Allen Telescope Array (ATA) in the Search for Extraterrestrial Intelligence (SETI).
![Moment 0 maps of the molecular lines. (d) rms = 0.005 Jy beam−1 km s−1 (3, 4, 5, 6 σ); (e) rms = 0.0077 Jy beam−1 km s−1 (5, 7, 9, 11, 13, 15 σ); (f) rms = 0.009 Jy beam−1 km s−1 (5, 7, 9, 11 σ); (g) rms = 0.0039 Jy beam−1 km s−1 (3, 4, 5 σ). Close-up images of each panel are shown below. These regions are indicated by a white dashed square in panel (a). Color scales are adjusted for the close-up ones. The black and white contours are the continuum map same as in the right panel of Figure 1. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/A-Cyanopolyyne.png?resize=1200%2C721&ssl=1)
Posted inAstrochemistry
A Cyanopolyyne-rich But COM-poor Massive Protostar: The First Hot Carbon Chain Chemistry Source G28.28-0.36
[astro-ph.GA] We present molecular emission line data from the massive young stellar object (MYSO) G28.28-0.36 (G28.28) obtained with the Atacama Large Millimeter/submillimeter Array Band 3. Cyanopolyynes (HC3N and HC5N) and […]
![Surviving CH4 fraction as a function of depth below the surface and effective GCR exposure time. The colour scale gives the CH4 abundance relative to its initial value, while the dashed contours indicate 90%, 50%, and 10% remaining CH4. Vertical dashed lines mark the 3σ viable GCR exposure range of 0.87 - 3.12 Gyr. Increasing GCR exposure progressively extends CH4 depletion to greater depths while more deeply shielded layers retain a larger fraction of their primordial CH4. --[astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Delayed.png?resize=1200%2C713&ssl=1)
Posted inComets and Asteroids
Delayed Methane Detection in 3I/ATLAS: GCR-Driven Subsurface Stratification and Interstellar Exposure Age Constraints
[astro-ph.EP] Interstellar comet 3I/ATLAS shows unusual volatile activity, including strong H2O, CO, and CO2 production and a delayed post-perihelion detection of CH4.
Posted inSETI & Technosignatures
Is A Nearby Advanced Alien Civilization Out There Waiting To Pounce On Earth? Unlikely, Says New Study
[Northern Arizona University] Science fiction suggests that life on other planets, if it exists, is likely far more advanced than life on Earth.
Posted inSETI & Technosignatures
Identifying Casual SETI Transmissions And Ultra-Faint RFI With Cumulant Imaging
[astro-ph.IM] Techniques for identifying radio beacons transmitted by extra-terrestrial civilizations are well advanced.
![Waste-heat temperature–luminosity phase space. Existing midinfrared searches occupy the warm band (orange); cold computational radiators fall in the far-infrared/submillimetre band (green) towards the CMB floor. Grey lines show 345-GHz flux-density contours for a source at 100 pc, from equation (10), which is linear in the fractional waste-heat luminosity 𝑓 on the vertical axis; the figure thus covers partial swarms and complete spheres (𝑓 = 1) alike. Markers indicate a complete 1 L⊙ cold sphere, the level of the archival debris-survey limits (Section 6.1), and the domain of warm mid-infrared searches. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Slysh.png?resize=1200%2C720&ssl=1)
Posted inSETI & Technosignatures
Slysh Haloes: The Waste Heat Of Cold Computing As A Submillimetre Technosignature
[astro-ph.IM] Searches for Dysonian waste heat have operated almost exclusively in the mid-infrared and are therefore sensitive primarily to technology radiating at 100-600K. We argue that mature, computation-dominated civilisations may […]
Posted inSETI & Technosignatures
Gaia DR3 Limits on Stellar Engine Technosignatures in Nearby Stars
[astro-ph.GA] An operating stellar engine that transfers momentum to its host star could produce an approximately persistent transverse acceleration during the Gaia Data Release 3 (DR3) observing epoch.
![Where the Dyson sphere on and off fits of M77 differ most, and how new photometry changes the comparison. In each panel, the upper sub-panel shows the median posterior AGENT-on (solid red) and AGENT-off (dashed blue) model spectra with shaded 16–84% posterior bands and the fitted photometry overplotted (open black circles), while the lower sub-panel shows the percent deviation of the AGENT-on model relative to the AGENT-off model, with the shaded band giving the 1σ uncertainty propagated in quadrature from the two independent fits. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/The-G.png?resize=1200%2C713&ssl=1)
Posted inSETI & Technosignatures
The Ĝ Infrared Search for Extraterrestrial Civilizations with Large Energy Supplies. V. When Galaxies Glow with Industry
[astro-ph.GA] We present the most robust stellar population synthesis (SPS)-based search for galaxy-spanning technological waste heat to date, applied to 129 nearby galaxies spanning a wide range of spectral energy […]