Prépublication
· 2026 arXiv
EN
Precision spectroscopy underpins quantum sensing, atomic timekeeping, and the search for terrestrial-mass exoplanets. Finding an Earth-Sun analog requires fractional splitting of spectral features that rivals the precision of the best laboratory spectroscopy....
Connor Fredrick, Ryan K. Cole et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
The NSF-DOE Vera C. Rubin Observatory will complete its ten-year Legacy Survey of Space and Time (LSST) in the mid-2030s. Its 8.4 m aperture and 9.6 square degree field of view give it an étendue unmatched by any facility planned for that era. The Rubin 2036:...
Andrés Alejandro Plazas Malagón, Steve Allen et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
Age is the one of the most difficult stellar properties to constrain. However, upcoming surveys such as PLATO are about to revolutionize our ability to measure FGK dwarf ages with asteroseismology. Here, we use The Cannon to construct a data-driven model for i...
Christopher Lam, Aida Behmard et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
Massive protostellar disks are expected to sustain high accretion rates through gravitational instability, while dust growth may modify their opacity, cooling efficiency, and stability. Conversely, the time-dependent and nonaxisymmetric structures produced by...
Ryota Yamamuro, Ryoki Matsukoba et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
Observations of exoplanetary atmospheres have revealed a rather complex co-existence between the gaseous and condensed phases, ranging from atmospheres apparently covered in clouds to clear ones, across a myriad of intermediate regimes. The interaction between...
Giambattista Aresu, Giovanni La Mura et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We study a two-component dark matter model in which a real singlet scalar and an inert doublet scalar are simultaneously present alongside the Standard Model, each stabilized by an independent discrete symmetry. The real singlet undergoes a strong first-order...
Deeksha Dattaram Naik, Arnab Chaudhuri
#hep-ph
Prépublication
· 2026 arXiv
EN
We present a technique using integral-field spectroscopy to kinematically isolate intracluster light (ICL) from the brightest cluster galaxy (BCG), enabling insights into their contrasting stellar populations and the inner dark matter halo profile. Applying th...
Callum Bellhouse, Steven Bamford et al.
#astro-ph.GA
Prépublication
· 2026 arXiv
EN
Asteroseismology relies on disk-integrated photometry or radial velocities, in which geometric cancellation suppresses modes of high spherical degree ($l\geq4$). Observations are thus limited to deeply penetrating, low-degree modes, leaving the outer envelope...
Marcus L. Marcussen, Mikkel N. Lund
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
In the Dark Ages, minihalos above the Jeans mass accrete gas from the intergalactic medium (IGM). The accreted gas would be heated to virial temperature and produces 21 cm signal in emission, while the majority of gas retained in the IGM is cold and has 21 cm...
Yan Dong, Bin Yue et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Generative models for precipitation nowcasting are trained and evaluated predominantly on wet-biased datasets, which over-represent precipitation events to emphasize rare extremes. Selecting test cases based on target observations is known to favor forecasts t...
Christoph Metzl, Stefan Kapsreiter et al.
#cs.LG
Prépublication
· 2026 arXiv
EN
Effectively preparing for changes in extreme flooding requires understanding present and future rainfall extremes with return periods up to $\sim$100-1000 years, including changes in intensity, spatial structure at km-scale and sub-daily temporal variability....
Henry Addison, Elizabeth J. Kendon et al.
#physics.ao-ph
Prépublication
· 2026 arXiv
EN
Accurate real-time forecasting of atmospheric pollutants is essential for reducing exposure risks and improving public health. Traditional numerical forecasting systems suffer from incomplete parameterizations, uncertain inputs, and high computational cost. Ex...
Yiheng Wang, Kai Zheng et al.
#physics.ao-ph