![Vertical cut through the best-fit disk model on a logarithmic radial scale. Shown are temperatures, where the gas density, ϱdisk, exceeds an assumed ISM density of ϱISM = 2.7 × 10−24 g cm−3 (Ferrière 2001) by a factor of 1000. The snowline at Tsnow = 170 K and the 100 K-line, as well as the unity optical depth lines at a wavelength of 3.1 µm (computed for the best-fit model described in Sect. 5.2.2) measured from the star to the observer and from observer to the star, illustrate the temperature and dust density structure of the disk. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Spatial.png?resize=1200%2C715&ssl=1)
[astro-ph.EP] The composition of rocky planets depends on the dust in their natal protoplanetary disk (PPD), potentially containing water ice. Crystalline water ice was detected in the PPD d216-0939 in […]
spectorscopy
![Elemental [X/Fe] abundances derived in this work as a function of stellar age. The solid orange lines show the best-fit linear age–abundance relations derived in this work, and the dotted grey lines show the corresponding relations from M. Bedell et al. (2018) for comparison. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/The-Sun.png?resize=1200%2C718&ssl=1)
Posted inStellar Cartography
The Sun’s Chemical Peculiarity: Disentangling Galactic Chemical Evolution And Planetary Engulfment In Solar Twins
[astro-ph.SR] Recent observational studies have suggested that the Sun may be chemically peculiar relative to the majority of solar twins.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Connecting Polarization To Exoplanet Yield Calculations For Habitable Worlds Observatory (HWO)
The Habitable Worlds Observatory (HWO) aims to enable the detection and characterization of Earth-like planets around Sun-like stars to search for possible signs of life elsewhere in our universe.
Posted inAstrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Two Fabry-Perots and Two Calibration Units for CARMENES
The wavelength calibration and nightly drift measurements for CARMENES (Calar Alto high-Resolution search for M dwarfs with Exoearths with Near-infrared and optical Echelle Spectrographs) are provided by a combination of […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release
A Critical UV Legacy: A Hubble Roadmap for HWO Science Readiness
The Habitable Worlds Observatory (HWO) will provide the first opportunity to directly image and spectrally characterize terrestrial exoplanets in the habitable zones of nearby stars.
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
The Asymmetric Carbon-rich Chemistry 0f The planet-forming Disk 0f HD 142527 Triggered By Late Infall
The planet-forming disk of HD 142527 is known for its azimuthally asymmetric dust trap, shadows, and spiral arms.
Posted inExoplanets, -moons, -comets, Status Report
A Climate-Constrained Bayesian Inverse Method for JWST Rocky Exoplanet Eclipse Spectra: A Case Study of LTT 1445A b
Determining whether temperate rocky exoplanets orbiting M stars retain atmospheres is currently a central goal of exoplanet astronomy. To this end, the James Webb Space Telescope has begun searching for […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
The CARMENES Search For Exoplanets Around M Dwarfs. A Homogeneous Catalogue Of Projected Rotational Velocities Accounting For Limb-darkening
Stellar rotation is closely linked to both age and magnetic activity. Through gyrochronology, it provides a means to estimate stellar ages and trace the evolution of planetary systems, and it […]
Posted inAstrochemistry, Astronomy & Telescopes, Biophysics, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report, Water/Hycean Worlds & Oceanography
Cluster Anions of Hydrated Polycyclic Aromatic Hydrocarbons: “Magic” Water Tetramer
The PAH-water (PAH = polycyclic aromatic hydrocarbon) interactions occur in interstellar ice grains and in atmospheres of planets and can serve as models for the interaction between water and graphite-like […]
![[L] The detrended and phase-folded RV time series of GJ 1132 b (top) and GJ 1132 c (bottom). Different draws of the Keplerian models from our posterior are superimposed in black. The different colored markers correspond to different RV time series. Binned data points are shown as red squares. [R] Phase-folded and detrended RV time series of LTT 3780 b (top) and LTT 3780 c (bottom). The best-fit Keplerian model is superimposed in black. The different colors and markers correspond to different RV time series. Binned data points are shown as red squares. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/04/Super-Earth-masses.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography
Super-Earth Masses And Stellar Abundances From NIRPS Reveal Tentative Evidence For Water-rich Formation Around M Dwarfs
Tracing the compositional link between terrestrial super-Earths and their host stars provides clues to their dominant formation pathway. By constraining the stellar abundances of refractory elements, we can predict the […]