![Gas-phase abundance evolution of CH3OH, CH3CHO, CH3OCHO, and CH3OCH3 in the representative warm-up model with Tmax = 200 K. The shaded rectangles indicate the observed abundance ranges derived in this work. The gray vertical band marks the time interval, (1.25–1.42) × 106 yr, over which the model abundances overlap most closely with the observed ranges for the four species. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Molecule-dependent.png?resize=1200%2C720&ssl=1)
[astro-ph.GA] We present a uniform IRAM-30m survey analysis of four oxygen-bearing complex organic molecules (COMs), methanol (CH3OH), acetaldehyde (CH3CHO), methyl formate (CH3OCHO), and dimethyl ether (CH3OCH3), toward 50 high-mass star-forming […]
Astronomy & Telescopes
![(Left) The aperture assumed in these simulations. Furthermore, the stellar radius is assumed to be 0.03 λ/D, and the planet is assumed to be at 1 λ/D in the positive X direction. Middle) The single-moded measurement shown in the pupil plane (top) and focal plane (bottom) obtained by using the highest information mode from the calculation of the SLD, denoted here as SLD Mode 0. Right) The single-moded measurement shown in the pupil and focal planes as calculated using a classical numerical optimization. Pupil plane extents are from -0.5 to 0.5 (with an aperture diameter normalized to 1), while focal plane extents are from -5 λ/D to 5λ/D. Both of these methods are described in Ref. 13, and achieve ηs ≈ 1 × 10−9 , with ηp at 1 λ/D of approximately 19%, and a maximum ηp of 73% at 1.8 λ/D. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Optimal-mode-sorting.png?resize=1200%2C717&ssl=1)
Posted inAstronomy & Telescopes
Optimal Mode-sorting Coronagraphy: Limits Of Single-moded Measurements For The Habitable Worlds Observatory
[astro-ph.IM] Conventional coronagraph architectures struggle to reach the theoretical limit of exoplanet detection at close working angles. Spatial mode-sorting is capable of reaching the theoretical limit, which previous work has […]
Posted inSETI & Technosignatures
A Dual-Burst Geometrical Prescription For Concurrent Signaling
[astro-ph.IM] We propose a dual-burst implementation of concurrent signaling for technosignature searches.
Posted inAstrochemistry
ALMA Central Molecular Zone Exploration Survey (ACES) I: Overview
[astro-ph.GA] The mass flows and energy cycles within the inner regions of galaxies exert a powerful influence on the evolution of the galaxy population.
Posted inStellar Cartography
TESS Photometry and Radial Velocity Analysis of the sub-Neptune Exoplanet π Mensae c and the Wider π Mensae Planetary System
[astro-ph.EP] Exoplanet characterization relies on precise measurements of planetary orbital and physical parameters. This is particularly important for planetary dynamics and atmospheric evolution, as orbital parameters help constrain system evolution, […]
Posted inExoplanets, -moons, -comets
Growing Planets Produce Extreme Dust Signatures
[astro-ph.EP] Collisions between planetary bodies are essential to the assembly of rocky planets like the Earth, but they are extremely difficult to observe. We therefore rely on indirect signatures of […]
![Robustness gallery (left to right). Yellow boxes denote detections morphologically classified as linear, while red boxes indicate signals with curvature. (a) Target drifting narrowband track + broadband impulsive transient, with the corresponding MSWNet cleaned map and predicted box. (b) Target + curved interfering track, with the cleaned map and predicted box. (c) Target + quasi-sinusoidally modulated interference, with the cleaned map and predicted box. (d) Target spanning patch boundaries (tiling), with the stitching result across patches. The brightened area is overlapping region and the green box is the equivalent detection obtained after cross-patch stitching. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/A-Wavelet-1.png?resize=1200%2C712&ssl=1)
Posted inSETI & Technosignatures
A Wavelet-Integrated Search Pipeline For Narrowband Technosignatures in FAST Observations of 33 Exoplanet Systems
[astro-ph.IM] Building on prior FAST targeted and blind SETI campaigns toward 33 exoplanet systems, we introduce a wavelet-integrated search pipeline for narrowband technosignature candidates in radio dynamic spectra.
![Sky coverage of the final sample of 1341 planet-hosting stars (yellow markers) shown in Galactic coordinates overlaid on the 2MASS near-infrared map (courtesy of ESA/Gaia/DPAC). The prominent overdensity corresponds to the Kepler mission (Borucki et al. 2010) footprint. -- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Probing-the-origins.png?resize=1200%2C716&ssl=1)
Posted inExoplanets, -moons, -comets
Probing The Origins. III. Exoplanet Demographics Across Galactic Birth Radii
[astro-ph.GA] We quantify radial mixing in exoplanet hosts and explore links between birth environment, orbital evolution, planetary architecture, and Galactic habitability. We constructed a homogeneous catalogue by cross-matching the Encyclopaedia […]
Posted inPLATO
Terrestrial Planet Hunter Plato Electronics Pass Pre-launch Tests
[ESA] The European Space Agency’s terrestrial planet hunter Plato has recently completed a series of key tests inside the Maxwell Test Chamber at ESTEC, demonstrating that its electronic equipment is […]
![Multiwavelength images of the two > 4𝜎 SJH candidates. Top: KIC 6606183. Bottom: KIC 9834255. Columns: WISE W1–W4 and Aladin DSS colour composite. Nearby sources are visible but their physical association requires high-resolution imaging. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Stellar-J.png?resize=1200%2C720&ssl=1)
Posted inSETI & Technosignatures
Stellar J-Harvesting: A Novel Angular Momentum Technosignature And First Search In The Kepler Field
[astro-ph.SR] We introduce Stellar J-Harvesting (SJH), a technosignature in which an engineered system extracts rotational angular momentum from a star.