![Stability map of the TOI-2211 system in the (Ωc , Ic) plane for the outer planet candidate TOI-2211.02. All other orbital parameters were fixed to the nominal solution from Table A.4. The colour scale shows the adopted stability indicator, with blue regions corresponding to stable configurations and red regions to unstable configurations. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Searching-for.png?resize=1200%2C719&ssl=1)
[astro-ph.EP] Small exoplanets on close-in orbits are exposed to high levels of stellar irradiation, which can effectively remove low-mass primordial H/He envelopes through atmospheric escape.
Astronomy & Telescopes
Posted inAstrochemistry
Complex Organic Molecules In Protostars With ALMA Spectral Surveys (COMPASS) VII. First Interstellar Detection Of Fully Deuterated Methanol
[astro-ph.GA] There have been no robust identifications of fully deuterated methanol, CD3OD, in the interstellar medium (ISM) to date.
![The Target Pixel File (TPF) of HS 0209+0832 from the TESS observations in Sector 71. The SPOC pipeline aperture is overplotted with shaded red squares. The position of HS 0209+0832 is demarcated by the number “1” and a white cross. All nearby sources within ∆m = 4 are displayed as red circles, with their size proportional to their brightness relative to HS 0209+0832. Each source is labelled by the rank of their projected distances from HS 0209+0832. The white arrows denote the orientation of the spacecraft during the observations. This figure was created with tpfplotter121 -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Discovery-of-a.png?resize=1200%2C718&ssl=1)
Posted inExoplanets, -moons, -comets
Discovery Of A Second-generation Planet Candidate Accreting Onto A White Dwarf
[astro-ph.EP] Many white dwarfs accrete the debris of disrupted planetary bodies, detected in the form of metal-enrichment in their atmospheres, dusty or gaseous circumstellar discs, and photometric transits from debris.
![1 and 2-planet detectability thresholds for 4 specific configurations of planet mass and period ratios (close to and outside of resonance). The black grid points represent systems where only a single planet is detectable. Grey points show where both planets are detectable. The red line is a power law fit to the upper black contour, parametrising the 2-planet detection threshold. Similarly, the blue line is a power law fit to the lower contour and parametrises the 1-planet detection threshold. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Detecting-multiple.png?resize=1200%2C716&ssl=1)
Posted inGaia Mission
Detecting Multiple Planets In Gaia Data Using Bayesian Model Selection
[astro-ph.EP] Gaia will soon provide a census of cold giant planets. However, an astrometric signal contains the superimposed reflex motion of all companions, so planetary signals cannot be treated individually.
![The fitted source and lens system positions as measured in the HST F606W (V −band; blue) and F814W (I−band; red) data. The contours show the 68%, 95%, and 99% confidence intervals for the V and I data, respectively. The measured V −band and I−band position of the (brighter) source star is nearly identical. We detect a weak (∼1.3σ) color-dependent centroid shift at the location of the lens system. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/First-Direct.png?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
First Direct Identification Of A Multi-Star Microlens System Hosting A Planet
[astro-ph.EP] Nearly 25 years have passed since gravitational microlensing delivered its first exoplanet discoveries.
Posted inSETI & Technosignatures
The First Decade of Breakthrough Listen
[astro-ph.IM] Breakthrough Listen (BL), launched in July 2015 with a 10-year, $100M commitment from the Breakthrough Prize Foundation, is the most comprehensive search for technosignatures ever conducted.
![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).
Posted inAstrochemistry
Complex Organic Molecules in Protostars with ALMA Spectral Surveys (COMPASS) II. Approach To Data Reduction And Products For Line-rich Broadband (sub)millimeter Spectra
[astro-ph.SR] Studying the chemical composition of the warm gas surrounding embedded solar-type protostars is one of the areas for which the Atacama Large Millimeter/submillimeter Array (ALMA) is particularly well suited.
![Column density maps of 13CO2, CO and OCN− ice (panel I, II and III, respectively). 12CO2 column densities are derived from 13CO2 column densities. Panel IV shows the ratio between the 4.38 µm and 4.39 µm peak of the 13CO2 ice feature. A higher ratio indicates higher degree of CO2 ice segregation. The axes are shown on astronomical unit scales. Pixelated areas especially in the north and south of the maps as well as the edges are caused by low signal-to-noise levels. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Mapping.png?resize=1200%2C718&ssl=1)
Posted inAstrochemistry
Mapping Of Interstellar Ices With JWST In Protostellar Envelopes: Spatial Variations Of 13CO2, 12CO2, CO, OCN− and H2O ice
[astro-ph.SR] The composition of planets and their atmospheres is largely determined by the formation environment of the planet. This environment is pre-determined during early stages when the protostar is still […]
Posted inAstronomy & Telescopes
An Analytic Error-Budget Model for the Habitable Worlds Observatory Coronagraph: From Optical Disturbances to Flux-Ratio Noise
[astro-ph.IM] A coronagraph stability allocation must protect a planet measurement, not merely satisfy a contrast target. Residual starlight both generates photon noise and interferes with small field perturbations, coupling optical […]