Prépublication
· 2026 arXiv
EN
The shape of an exoplanet encodes fundamental information about its internal structure. For close-in giant planets, strong stellar tidal forces induce measurable deformations that can be probed through high-precision photometry. These deformations are quantifi...
Vanesa Ramirez, Yamila Miguel et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Our understanding of complex organic chemistry during the formation of stars and planets is shaped by a handful of cherry-picked sources with bright molecular emission lines. This observational bias impedes our assessment of how universal chemical complexity i...
Maria N. Drozdovskaya, Timea Csengeri et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
A growing number of transiting exoplanets exhibit spectroscopic evidence that their leading and trailing limbs differ. Interpreting these observations is now the limiting step. The standard approach of fitting limb-resolved transit depths results in highly ant...
Sagnick Mukherjee, Luis Welbanks et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We present a homogeneous analysis of 268 confirmed and candidate transiting hot-Jupiter host stars with 4800K < Teff < 6200K. We combine high-resolution TRES spectra, Gaia, 2MASS and WISE photometry, and Gaia astrometry to determine these stars' Teff, log g, R...
Victoria DiTomasso, Samuel W. Yee et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Water megamasers in the circumnuclear disks of active galactic nuclei are among the most precise probes of supermassive black holes. VLBI imaging of 22 GHz disk masers has provided geometric distances to independently constrain $H_0$, accurate black hole mass...
Ingyin Zaw, C. M. Violette Impellizzeri et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
Venus and Mars are unique laboratories for understanding the evolution and diversity of terrestrial planets. Despite their broadly similar rocky compositions, their atmospheres, climates, and surface environments have evolved into dramatically different states...
Hideo Sagawa, Arianna Piccialli et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
Mutual coupling between elements of low-frequency arrays is a leading systematic for 21 cm cosmology, leaking bright foregrounds into otherwise clean regions of the power spectrum. Many mitigation models describe coupling as a linear combination of uncoupled s...
Vincent MacKay, Robert Pascua et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
The CMB constrains the gravitational constant $G$ at recombination to a few percent of its laboratory value, but the effect of $G$ on recombination itself is usually absorbed into a global fit rather than made explicit. We return to the semi-analytic descripti...
Brahim Lamine, Sébastien Beauchamp et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
A global haloscope network could turn an axion discovery into astronomy of dark matter substructure and transients. We combine interferometric phase, spatial coherence, and spectroscopy to study the formation and evolution of axion substructure through measure...
Jae Hyeok Chang, Stefano Profumo
#hep-ph
Prépublication
· 2026 arXiv
EN
Reverberation mapping of active galactic nuclei uses the time taken for variability to travel through the system as a measure of system size, with this size being used to inform estimates of the mass of the central black hole, a technique that has graduated to...
Hugh McDougall, Tamara M. Davis et al.
#astro-ph.GA
Prépublication
· 2026 arXiv
EN
The initial chemical composition of planets, primitive bodies in our solar system, and exoplanets is ultimately set by their nascent protoplanetary disks. Yet observing key carbon-, oxygen-, and nitrogen-bearing molecules (as well as rarer but important sulphu...
Catherine Walsh, Maria Drozdovskaya et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
Polarization reveals details of circumstellar disks that are not readily available from total intensity observations. Via multi-wavelength polarimetric observations of disks, we can trace how planets form, how dust grains evolve at the onset of planet formatio...
Ian Stephens, Sarah Sadavoy et al.
#astro-ph.IM