Cosmology Papers of the Week

Here, we forecast the number counts of galaxies emitting [OII], H\b{eta}, [OIII], H{\alpha} and Pa\b{eta} lines in the Euclid Wide Survey (EWS) and Deep Survey (EDS).

Abstract We present 18 DZ white dwarfs, identified by metal absorption features, most prominently the Ca ii H and K lines, from spectroscopic observations in the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX).

We estimate the source redshift distribution of current weak lensing surveys by applying the clustering-based redshift calibration technique, using the galaxy redshift sample provided by the Dark Energy Spectroscopic Instrument Data Release 1 (DESI-DR1).

Abstract We present the largest statistical spectroscopic sample of radio quasars at 4.7 ≤ z ≤ 6.7 to date.

Using $SU(2)_L$ gauge invariance we show that the dual axion couples to electrons as $g_{a\gamma}g_{ae}=m_e/\Lambda_*^2\simeq5\times10^{-12}\,\mathrm{GeV}^{-1}$.

Around supermassive black holes, however, orbiting stars and compact objects act as a perturbation that drains energy from the cloud, potentially preventing its formation altogether. In this work, we quantify under what conditions this happens, focusing on bound-free state transitions.

We find preSNe bounds on dark photon couplings up to two orders of magnitude stronger than SNe for masses between 1 and 3~MeV, with similar improvements for other electrophilic species such as axion-like particles.

We use deep JWST/NIRSpec spectroscopy from the DIVER program to measure Ly$\alpha$ in 12 compact broad-line emitters (CBEs) at $z=4.2$--5.5 in GOODS-N.

We show that the vacuum metamorphosis model with decay fits current baryon acoustic oscillation and supernova distance data and cosmic microwave background measurements significantly better than $\Lambda$CDM and nearly as well as $w_0w_a$CDM with the same number of parameters.

We demonstrate a viable fit to current cosmological data from a simple Horndeski modified gravity theory that softly breaks shift symmetry.

In this paper, we develop a multifluid framework to investigate the evolution of three dimensional nonlinear magnetohydrodynamics (MHD) during the non instantaneous reheating phase driven by the perturbative decay of the inflaton into the radiation plasma.

This is especially true when the dark energy sector evolves through an effective pressureless matter phase, leading to degeneracies between the model parameters and the matter density parameter. In this work, we show that redshift-space distortion (RSD) measurements help break this degeneracy when combined with expansion history probes including Pantheon$^{+}$ supernovae and DESI DR2 BAO measurements.

We investigate the cosmological implications of supermassive primordial black holes (PBHs) as a component of dark matter (DM), focusing on their seed effect on large-scale structure formation.

We develop a hierarchical Bayesian framework to infer the population properties of microlenses from an ensemble of microlensed GW events, constraining the slope of the power-law lens mass function ($\alpha_{\rm ML}$), the lens number density ($n_0$), and the fraction of dark matter in compact lenses ($f_{\rm DM}$).

We perform the first (3+1)-dimensional lattice simulations of a cosmological first-order phase transition (PT) in which true-vacuum bubbles with random phases nucleate, expand, and collide, producing a network of global strings.