Earth and Planetary Astrophysics Papers of the Week

The variability observed in all tracers in this study is consistent with a scenario where gas mass builds up near the disk edge to modulate the burst peak intensity and gas density in the inner cavity every $\sim4$-5 orbital periods.

We report theoretical predictions and modeling of the far-wing absorption of CO2 broadened by He over a wide temperature range (200-1000 K), which are relevant for exoplanet atmosphere studies.

Characterizing it has proven challenging, owing to the mismatch between the observed complexity and the relatively simple semi-analytical models typically used to interpret it. To augment these analyses, we apply the second-order structure function to the velocity and temperature perturbations of four low-inclination sources from the exoALMA program, each measured against a noise-only null built from the data themselves.

Here we present a new physics-based method for starlight subtraction.

Here, we confirm TOI-4129\,b, a planet that may help to reveal the origin of the Neptune ridge.

Following the Double Asteroid Redirection Test (DART) impact, radiative recoil, tides, and other dissipative processes drive the dynamical evolution of the Didymos-Dimorphos binary, yet the effect of unresolved surface roughness on radiative migration remains poorly quantified. We incorporate this roughness into a binary thermophysical model coupled to planar spin-orbit dynamics.

We determine the best-fitting fPos through $\chi^2$ minimization and apply the method to astrometric data for the directly imaged PDS 70 and HR 8799 systems and to radial-velocity data for GJ 876.

We use two metrics: the normalized transit duration $T/T_0$, set by the host-star density, and the pairwise duration ratio $\xi$ between neighboring transiting planets.

We developed a comprehensive, long-term thermochemical evolution model that couples thermal history with magnetic field generation.

Here we report three systems-24 Boo b, HD 12648 b, and TYC 4282-605-1 b-whose host stars are confirmed red-clump giants through asteroseismology, showing that each has already undergone dramatic expansion and contraction following helium ignition.

In this work, we aim to assess the capability of ET to detect orbital decay in hot Jupiters previously observed by Kepler.

We investigate the potential of the Ariel space telescope to detect and characterise exocomet transits through their wavelength-dependent photometric signatures.

Here we propose a novel model of coda wave generation with random fractures in the lunar crust, where vacuum fractures prevent seismic wave propagation as insulating boundaries, causing strong persistent reverberation in terms of total reflection among fractures.

The discovery of C/2026 A1 (MAPS) three months before its perihelion offered a rare opportunity to investigate the composition and activity of a Kreutz sungrazing comet. We present the first millimetre wavelength study of this type of comet.

Abstract Models that track the size evolution of exoplanets often assume a prescribed initial thermal state or a single adiabatic index to describe the planetary interior structure, the latter of which is taken to be γ  ∼ 1.4, which is likely appropriate for evolved planets (≳1 Gyr).

We present ALMA and NOEMA observations of six CO isotopologue lines ($^{13}$CO, C$^{18}$O, and C$^{17}$O, $J$=2--1 and 1--0).

We present BeAR, the Bern Atmospheric Retrieval code and successor of Helios-r, and its new high-resolution cross-correlation framework for emission and transmission spectra.

By integrating radial velocity curves with light curves, we determined the fundamental physical parameters for both components.

A subset of $581$ planets around $404$ hosts, for which detection and confirmation completeness can be characterised, forms the reference sample. We measure the valley morphology and its locus in the period-radius plane, and infer the intrinsic super-Earth fraction with a selection-conditioned mixture model that accounts for stellar-age uncertainties.

We have obtained VLT/CRIRES+ high-resolution spectrographic observations over a selection of different dark targets, confirming that the features are indeed explained by a reduction in the flux of the helium 1.083$\mu$m triplet, a reduction that is fairly uniform across the line.