Multi-wavelength observations of SN 2019vxm trace three phases of shock interaction in a Type IIn supernova, estimating CSM mass of 3-8 solar masses and ejecta mass of ~3.88 solar masses with late-time dust signatures.
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New time-series observations of split comet 240P/NEAT yield component radii of 400-600 m and ~300 m, peak dust loss rates of 130 and 35 kg/s, total ejected masses of 1.5e9 and 2.3e8 kg, and separation at 1 m/s consistent with outgassing-driven rotational instability over 3 years ago.
SN 2020aze displays early He II emission from ejecta-CSM interaction, a steep V-band decline, and semi-analytical modeling yields a ~14 solar-mass red supergiant progenitor with ~12 solar-mass ejecta and 1.5e51 erg explosion energy.
Union3 compilation of 2087 SNe Ia with UNITY1.5 framework shows 1.7-2.6 sigma tension with LambdaCDM and possible thawing dark energy.
Asteroid 2024 YR4 has a 19.46-minute rotation period, Sq or K taxonomy, and absolute magnitude H_V of 24.14 with a shallow phase curve slope of G=0.51.
citing papers explorer
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Two years of shock interaction tracing three phases of evolution: the explosion of a Type IIn supernova, SN 2019vxm
Multi-wavelength observations of SN 2019vxm trace three phases of shock interaction in a Type IIn supernova, estimating CSM mass of 3-8 solar masses and ejecta mass of ~3.88 solar masses with late-time dust signatures.
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Investigation of Split Comet 240P/NEAT
New time-series observations of split comet 240P/NEAT yield component radii of 400-600 m and ~300 m, peak dust loss rates of 130 and 35 kg/s, total ejected masses of 1.5e9 and 2.3e8 kg, and separation at 1 m/s consistent with outgassing-driven rotational instability over 3 years ago.
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Early interaction signatures and an extended plateau phase in Type II SN 2020aze
SN 2020aze displays early He II emission from ejecta-CSM interaction, a steep V-band decline, and semi-analytical modeling yields a ~14 solar-mass red supergiant progenitor with ~12 solar-mass ejecta and 1.5e51 erg explosion energy.
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Union Through UNITY: Cosmology with 2,000 SNe Using a Unified Bayesian Framework
Union3 compilation of 2087 SNe Ia with UNITY1.5 framework shows 1.7-2.6 sigma tension with LambdaCDM and possible thawing dark energy.
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Rapid-response characterization of near-Earth asteroid 2024 YR4 during a Torino Scale 3 alert
Asteroid 2024 YR4 has a 19.46-minute rotation period, Sq or K taxonomy, and absolute magnitude H_V of 24.14 with a shallow phase curve slope of G=0.51.