Ely D. Kovetz

New boundary condition on reionization

Sarah Libanore, Ely D. Kovetz, Julián B. Muñoz, Yonatan Sklansky et autres

The epoch of reionization (EoR) marks the last phase transition of hydrogen in our Universe, as it evolves from cold and neutral to hot and ionized in the intergalactic medium (IGM). While its end point and duration can be estimated from current …

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When galaxies burst: enhanced shot-noise for line-intensity mapping in the JWST era

Ely D. Kovetz, Hovav Lazare, Sarah Libanore, Julian B. Muñoz et autres

Recent JWST observations indicate that star formation at $z\!\sim\!4-6$ is more stochastic than previously assumed, with rms log-SFR scatter $\sim\!0.6$ dex at $M_h\!\sim\!10^{11}M_{\odot}$, growing toward smaller halos and time-correlated on $\sim\!25$ Myr. This is significantly higher than the typical $\sim\!0.3$ dex phenomenological …

When galaxies burst: enhanced shot-noise for line-intensity mapping in the JWST era

Ely D. Kovetz, Hovav Lazare, Sarah Libanore, Julian B. Muñoz et autres

Recent JWST observations indicate that star formation at $z\!\sim\!4-6$ is more stochastic than previously assumed, with rms log-SFR scatter $\sim\!0.6$ dex at $M_h\!\sim\!10^{11}M_{\odot}$, growing toward smaller halos and time-correlated on $\sim\!25$ Myr. This is significantly higher than the typical $\sim\!0.3$ dex phenomenological …

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Constraining Lyman–Werner Feedback from Velocity Acoustic Oscillations in the Cosmic Dawn 21 cm Signal

Xi Du, Bin Yue, Furen Deng, Yidong Xu et autres

Abstract During Cosmic Dawn, Pop III stars could be formed in minihalos through molecular hydrogen (H 2 ) cooling. The minimum halo mass required for H 2 cooling is highly sensitive to Lyman–Werner (LW) radiation, which dissociates H 2 and regulates star …

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Constraining Lyman-Werner Feedback from Velocity Acoustic Oscillations in the Cosmic Dawn 21 cm Signal

Xi Du, Bin Yue, Furen Deng, Yidong Xu et autres

During Cosmic Dawn, Pop III stars could be formed in minihalos through molecular hydrogen (H$_2$) cooling. The minimum halo mass required for H$_2$ cooling is highly sensitive to Lyman-Werner (LW) radiation, which dissociates H$_2$ and regulates star formation. However, the efficiency of …

Constraining Lyman-Werner Feedback from Velocity Acoustic Oscillations in the Cosmic Dawn 21 cm Signal

Xi Du, Bin Yue, Furen Deng, Yidong Xu et autres

During Cosmic Dawn, Pop III stars could be formed in minihalos through molecular hydrogen (H$_2$) cooling. The minimum halo mass required for H$_2$ cooling is highly sensitive to Lyman-Werner (LW) radiation, which dissociates H$_2$ and regulates star formation. However, the efficiency of …

First Galaxy Ultraviolet Luminosity Function Limits on Dark Matter–Proton Scattering

Hovav Lazare, Ely D. Kovetz, Kimberly K. Boddy, Julián B. Muñoz

Scattering between dark matter (DM) and protons leads to suppressed small-scale fluctuations, with implications for a variety of cosmological observables. In this Letter, we search for evidence of DM-proton scattering with an interaction cross section σ=σ_{0}(v/c)^{n} for n=0, 2 and 4, corresponding, …

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Tracing the neutrino-induced phase shift in the 21-cm spectrum

Gabriele Montefalcone, Hector Afonso G. Cruz, Julián B. Muñoz, Ely D. Kovetz et autres

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Reionization Bubbles from Real-Space Cross Correlations of Line Intensity Maps

Émilie Thélie, Sarah Libanore, Yonatan Sklansky, Julian B. Muñoz et autres

We propose a new way to reconstruct the ionized-bubble size distribution during the Epoch of Reionization (EoR) through the real-space cross-correlation of 21-cm and star-forming line-intensity maps. Understanding the evolution and timing of the EoR is crucial for both astrophysics and cosmology, …

Reionization Bubbles from Real-Space Cross Correlations of Line Intensity Maps

Émilie Thélie, Sarah Libanore, Yonatan Sklansky, Julian B. Muñoz et autres

We propose a new way to reconstruct the ionized-bubble size distribution during the Epoch of Reionization (EoR) through the real-space cross-correlation of 21-cm and star-forming line-intensity maps. Understanding the evolution and timing of the EoR is crucial for both astrophysics and cosmology, …

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Effective model for line intensity mapping: Auto- and cross-power spectra in the cosmic dawn and reionization

Sarah Libanore, Julián B. Muñoz, Ely D. Kovetz

Line intensity mapping (LIM) is emerging as a powerful probe of the high-redshift Universe, with a growing number of LIM experiments targeting various spectral lines deep into the epochs of reionization and cosmic dawn. A key remaining challenge is the consistent and …

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Joint 21-cm and CMB forecasts for constraining self-interacting massive neutrinos

Sarah Libanore, Subhajit Ghosh, Ely D. Kovetz, Kimberly K. Boddy et autres

Self-interacting neutrinos provide an intriguing extension to the Standard Model, motivated by both particle physics and cosmology. Recent cosmological analyses suggest a bimodal posterior for the coupling strength ${G}_{\mathrm{eff}}$, favoring either strong or moderate interactions. These interactions modify the scale dependence of …

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