科学研究
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2024.05.21
Galaxy Assembly Revealed by the Life Cycle of Star Clusters
The life cycle of a star cluster can be broken into three epochs: 1) the birth of the cluster; 2) the long phase when the cluster evolves in gravitational equilibrium, gradually losing stars; and 3) the death of the cluster when it dissolves into a stream of stars. The clusters in the first epoch directly record the initial properties inherited from the host galaxy. The evolved clusters during ...
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2024.05.17
Portable Fantacies: How to Work with Android-like Devices
Over the past few years, the computing capability of portable devices equipped with ARM processors has expanded exponentially. Yet, despite their growing power, the prevalent Android-like operating systems often confine users to a 'walled garden,' restricting direct interaction with the core Linux functionalities. In this presentation, we will explore the transformative potential of Termux and ...
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2024.05.16
Observations and 3D MHD simulations of magnetic reconnection
Magnetic reconnection is a fundamental physical process in various astrophysical, space, and laboratory environments. In solar physics, it is even believed to be a key mechanism to heat/accelerate plasmas and drive the eruption of large-scale magnetic field, giving rise to coronal mass ejections and flares, as well as solar energetic particles. High-cadence and high-resolution observations rece...
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2024.05.14
Gravitational radiation from oscillations of ultracompact stars
By analytically solving the Teukolsky gravitational wave equation for the spacetime of an ultracompact star of constant density, we derive exact and simple formulae that completely describe weakly damped oscillations trapped inside such stars. No similar complete analytic solution was known before, despite several attempts to find it. Our solution is cast in terms of the quasi normal modes of o...
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2024.05.10
Biases and uncertainties in quantifying morphology of galaxies at high redshifts with JWST
Observations of high-redshift galaxies with unprecedented detail have now been rendered possible with JWST. However, accurately quantifying their morphology remains uncertain due to potential biases and uncertainties. To address this issue, I used a sample of 1816 nearby DESI galaxies to compute artificial images of galaxies of the same mass located at high redshifts and observed at rest-frame ...
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