3 papers
astro-ph.GA2026
On the relative CNO underabundance in quasar absorption systems at arising from Population III enrichment and attenuation by intermediate-mass black holes and primordial baryon accretion
Murilo Macedo, Carlos Alexandre Wuensche, Oswaldo Duarte Miranda
This article uses an adapted version of the semi-analytical model of cosmic chemical enrichment developed by \citet{Corazza_2022} to reproduce the observed abundances of C, N, and…
astro-ph.CO2025
The cosmological lithium problem
Oswaldo D. Miranda
The discrepancy between the predictions of primordial nucleosynthesis and the observed lithium abundance in Spite plateau stars has been attributed either to a challenge to the sta…
gr-qc2025
Optimal Detection Bands for Intermediate-Mass Black Hole Binaries: Prospects for LISA and AMIGO in General Relativity and Gravity
Marcelo M. Lapola, Oswaldo D. Miranda
We present a semi analytic forecast for the detection of intermediate mass black hole (IMBH) binaries with the space based detectors LISA (millihertz band) and AMIGO (deci hertz ba…