Search Results - Yanjun Guo
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The Binary Fraction of B-type Runaway Stars from LAMOST DR8
Published 2025-01-01Get full textRunaway stars are defined as stars that depart from their birth clusters at high peculiar velocities. There are two main mechanisms for the formation of runaway stars, i.e., the binary-supernova scenario (BSS) and the dynamical ejection scenario (DES). Investigating the binary fraction of runaway st...
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The Magnified Waltz: Simulating Light Curves of Binary Stars Passing Through Microcaustics in Strong Lensing Galaxy Clusters
Published 2025-01-01Get full textIndividual stars located near the caustics of galaxy clusters can undergo extreme magnification when crossing microcaustics, rendering them observable even at cosmological distances. Though most massive stars are likely to reside in binary systems rather than as single star, the influence of a binar...
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H I Absorption Line and Anomalous Dispersion in the Radio Pulses of PSR B1937+21
Published 2025-01-01Get full textWe use the Five-hundred-meter Aperture Spherical radio Telescope to observe the bright millisecond pulsar PSR B1937+21 (J1939+2134) and record the data in the band from 1.0 to 1.5 GHz. We measure the neutral hydrogen (H I ) emission and absorption lines near 1420 MHz ( λ ≃ 21 cm). We derive the kin...
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