Yan-Jie Xue

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By the method of water culture, the root exudates of Cangshan garlic and Caijiapo garlic were collected to study their allelopathic effects on the seed germination and seedling growth of lettuce, and on the development of pathogens Fusarium oxysporum f. sp. cucumerinum and F. oxysporium f. sp. niveum. The root exudates of the two garlic cultivars promoted(More)
While X-ray measurements have so far revealed an increase in the volume-averaged baryon fractions fb(r) of galaxy clusters with cluster radii r, fb(r) should asymptotically reach a universal value fb(∞) = fb, provided that clusters are representative of the Universe. In the framework of hydrostatic equilibrium for intracluster gas, we have derived the(More)
We present a comparison of the SZ cluster counts predicted by the Press-Schechter (PS) mass function (MF) and the X-ray luminosity function (XLF) of clusters. The employment of the cluster XLF, together with the observationally determined X-ray luminosity(LX)-temperature(T ) relation, may allow us to estimate the SZ cluster counts in a more realistic(More)
Rich and massive clusters of galaxies at intermediate redshift are capable of magnifying and distorting the images of background galaxies. A comparison of different mass estimators among these clusters can provide useful information about the distribution and composition of cluster matter and their dynamical evolution. Using a hitherto largest sample of(More)
Using a simple analytic approach we address the question of whether radiative cooling, nongravitational heating and cooling plus heating models can simultaneously explain the observed global X-ray properties (entropy and X-ray luminosity distributions) of groups and clusters and the residual soft Xray background (XRB) after discrete sources are removed.(More)
It is widely believed that the global baryon content and mass-to-light ratio of groups and clusters of galaxies are a fair representative of the matter mix of the universe and therefore, can be used to reliably determine the cosmic mass density parameter ΩM. However, this fundamental assumption is challenged by growing evidence from optical and X-ray(More)
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