Bayesian continuum fitting of 66 LRDs shows the BH* model fits ~6% best, rising to ~40% under AGN-disfavoring priors, with most objects stellar/AGN-dominated and possible evolutionary trends.
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New spectroscopic data on young clusters in NGC 5253 indicate younger ages than photometric estimates and reveal correlations between outflow velocities and cluster properties, showing supernova feedback active at ages over 5 Myr in a 0.3 solar metallicity environment.
SAMOS demonstrates reliable target acquisition, programmable multi-object spectroscopy at R~2500 and R~10000, and 0.3 Å calibration accuracy after on-sky commissioning at SOAR.
Different SED fitting techniques and data types produce stellar parameters and xi_ion values differing by up to 1.1 dex even for a homogeneous sample of z=3 EoR-analog galaxies, with apparent redshift evolution of xi_ion appearing only under consistent methodology.
Extended gamma-ray emission around Berkeley 59 is produced by cosmic rays accelerated in cluster winds colliding with ambient gas.
citing papers explorer
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Between Degeneracy and Evolution: UV-to-optical Insights into the BH$^*$ Model in Little Red Dots
Bayesian continuum fitting of 66 LRDs shows the BH* model fits ~6% best, rising to ~40% under AGN-disfavoring priors, with most objects stellar/AGN-dominated and possible evolutionary trends.
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Spectroscopic characterization of Young Stellar Populations and their Feedback in NGC 5253
New spectroscopic data on young clusters in NGC 5253 indicate younger ages than photometric estimates and reveal correlations between outflow velocities and cluster properties, showing supernova feedback active at ages over 5 Myr in a 0.3 solar metallicity environment.
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Exploring biases in derived stellar parameters and the ionizing photon production efficiency
Different SED fitting techniques and data types produce stellar parameters and xi_ion values differing by up to 1.1 dex even for a homogeneous sample of z=3 EoR-analog galaxies, with apparent redshift evolution of xi_ion appearing only under consistent methodology.