Prépublication
· 2026 arXiv
EN
Trends with stellar elemental abundances and condensation temperature have been proposed as a possible tracer of rocky planet formation. Here we present an alternative explanation, where we show that stellar activity (star spots) can also cause apparent abunda...
Andrew R. Casey, Megan Bedell et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
The cosmic reheating is an important epoch in the very early Universe, and has significant impacts on the primordial black hole (PBH) abundance and the scalar-induced gravitational wave (SIGW) spectrum. The relevant energy scale and the constituents of cosmic...
Qi-Lin Yang, Shi-Jie Wang et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Recent exoplanet surveys reveal a systematic trend in the mass ratios of giant planet pairs ($> 30 M_\oplus$). Although the $M_{outer}/M_{inner}$ is broadly centered near unity, it exhibits a dependence on orbital separation. Compact pairs tend to have compara...
Bixuan Zhao, Hui Zhang et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Ongoing stage IV galaxy surveys such as DESI or Euclid offer an unprecedented amount of information to study the large-scale structure of the Universe by mapping tens of millions of galaxies. Within the context of cosmic voids, already released and future cata...
Óscar Monllor-Berbegal, Susana Planelles et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Eclipsing binaries consisting of a solar-type primary and an M dwarf secondary are key laboratories to study objects at the bottom of the main sequence. Fundamental parameters of such stars have a direct impact upon exoplanetary studies, as searches for temper...
Adam T. Stevenson, Yasmin T. Davis et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
Precise and accurate measurements of host stars are crucial in the search for Earth-like exoplanets, and M-dwarfs are favourable targets in this quest. Low-mass eclipsing binaries offer unique opportunities to empirically determine stellar masses and radii for...
Yasmin T. Davis, Amaury H. M. J. Triaud et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
In the minimal type-I seesaw, one right-handed neutrino (RHN) can decouple from neutrino mass generation. Such a state is usually neglected, yet its feeble couplings make it long-lived, and it can dominate the energy density of the Universe before decaying. We...
Stephen F. King, Rishav Roshan et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
The LZ collaboration has recently reported a single nuclear-recoil event at $E_R=248\pm23_\text{stat}\pm23_\text{sys}$ keV, observed in a 2.84 tonne-year exposure with a local significance of $3.4σ$, pointing towards an inelastic dark matter (DM) interpretatio...
Sujit Kumar Sahoo, Narendra Sahu et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
Artificial warming via engineered aerosols presents a novel pathway to bypass volatile scarcity on modern Mars. Utilizing the Generic Planetary Climate Model, we evaluate the physical feasibility of aerosol-induced terraforming over a full Martian year (669 So...
Tom N. Landefeld, Harald Lesch
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
The LiteBIRD satellite mission aims to measure the tensor-to-scalar ratio $r$ with unprecedented sensitivity through observations of the cosmic microwave background (CMB) $B$-mode polarisation. Robust constraints on $r$ require accurate likelihood modelling ac...
G. Galloni, P. Campeti et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Ground-based cosmic microwave background (CMB) experiments filter their time-ordered data to remove $1/f$ noise and ground pickup, which removes or mixes the large angular scales where primordial $B$ modes peak. A common remedy is a pseudo-$C_\ell$ estimator w...
Giacomo Galloni
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
A hypothetical origin as lunar ejecta for Earth's quasi-satellites (QS) has gained initial support in recent years, but there is scarce photometric and/or spectroscopic data to support the premise due to the rare observational windows to obtain such data for t...
Grigori Fedorets, Zuri Gray et al.
#astro-ph.EP