ABSTRACT The dynamical excitation of asteroids due to mean motion resonant interactions with planets is enhanced when their parent star leaves the main sequence. However, numerical investigation outcomes within post-main-sequence simulations computationally expensive, limiting extent which detailed analyses have been performed. Here, we combine use a high-performance computer cluster and genera...

White dwarfs rotate. The angular momentum in single white dwarfs must originate early in the life of the star, but also must be modified (and perhaps severely modified) during the many stages of evolution between birth as a main– sequence star and final appearance as a white dwarf. Observational constraints on the rotation of single white dwarf stars come from traditional spectroscopy and from ...

background: the purpose of this study is to investigate the relationship between the cognitive impairment and naa/cr and cho/cr ratios in the proton magnetic resonance spectroscopy (1hmrs), and to assess the importance of 1hmrs in the early diagnosis of cognitive impairment in patients with ischemic white matter lesions (wmls). materials and methods: a total of 45 patients (23males and 22 femal...

In November 2019, the nearby single, isolated DQ-type white dwarf LAWD 37 (WD 1142-645) aligned closely with a distant background source and caused an astrometric microlensing event. Leveraging astrometry from \Gaia{} followup data \textit{Hubble Space Telescope} we measure deflection of obtain gravitational mass for LAWD~37. The main challenge this analysis is in extracting lensing signal fain...

The heterogeneity of lead isotope ratios white paints within individual paintings is evaluated. analyses five different 17th-century Dutch paintings, sampled in locations, identifies the presence isotopic a single painting. Pure pigment form cones 16th-century Venetian white, contrast, was found to be isotopically homogeneous. study evaluates origins increased evolution from pure artwork.

Here we report that the change from the red seeds of wild rice to the white seeds of cultivated rice (Oryza sativa) resulted from the strong selective sweep of a single mutation, a frame-shift deletion within the Rc gene that is found in 97.9% of white rice varieties today. A second mutation, also within Rc, is present in less than 3% of white accessions surveyed. Haplotype analysis revealed th...