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	1. Are crystalline silicates and amorphous silicates spatially separated in protoplanetary disks ?
	LI Moping,LI Aigen
	Astronomy 09 May 2017
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	Abstract:Crystalline silicates have been found in comets, in protoplanetary disks around young pre-main sequence stars, in debris disks around main-sequence stars, and in dust shells around evolved stars. Their infrared (IR) emission spectra indicate that they are predominantly magnesium (Mg)-rich and iron (Fe)-poor or even Fe-free. The Stardust cometary samples of crystalline silicate minerals are also predominantly Fe-poor. The Fe content of crystalline silicates not only affects the peak wavelength, width and strength of their vibrational features in the IR, but also affects their ultraviolet (UV) and visual absorptivities. Taking the young Herbig Ae star HD 142527 as a test case, we quantitatively demonstrate that, as a consequence of the latter effect, the crystallinity degree of silicate dust might have been substantially underestimated in various astrophysical regions, and the non-detection of the crystalline silicate emission features does not necessarily imply the absence of crystalline silicate dust; instead, crystalline silicates could be present but are just not heated sufficiently to emit at their characteristic IR vibrational bands.
	TO cite this article:LI Moping,LI Aigen. Are crystalline silicates and amorphous silicates spatially separated in protoplanetary disks ?[OL].[ 9 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4732592


	2. How the shape of distance ratio in strong lensing systems affect cosmological constrains
	Yu Heng
	Astronomy 21 April 2017
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	Abstract:The strong lensing events from galaxies and galaxy clusters are good cosmological probe. From these systems, the angular diameter distance ratio between the distance to the lensing source $D_{s}$ and that from an deflector to an source $D_{ds}$ can be derived observationally. They are thought as unbiased measurement and used to constrain different cosmological models. We find this ratio contain a priori assumption about the lensing events according to Bayesian statistics. So a fair estimation of the distribution of lensing events in the universe are necessary to make this method more reliable.
	TO cite this article:Yu Heng. How the shape of distance ratio in strong lensing systems affect cosmological constrains[OL].[21 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725228


	3. Optical Substructure analysis of Galaxy Cluster Abell 2142
	Yu Heng,Liu Ang
	Astronomy 18 April 2017
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	Abstract:Galaxy cluster A2142 is a famous merging cluster. With X-ray telescope, its elongated morphology, sharp cold front, and in-falling group in the outskirt can be clearly seen. But without independent crosschecking method, its physical and dynamical properties are still hard to measure. We adopt the new hierarchical tree analysis method to explore its substructure with redshifts of its member galaxies. The substructures we find associate with its X-ray patterns very well. The complex dynamical status and the merging history of A2142 are revealed.
	TO cite this article:Yu Heng,Liu Ang. Optical Substructure analysis of Galaxy Cluster Abell 2142[OL].[18 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725594


	4. The universal “heartbeat” oscillications in black hole systems accross the mass-scale
	Wu Qingwen,Bozena Czerny,Mikolaj Grzedzielski,Agnieszka Janiuk,Wei-Min Gu,Ai-jun Dong,Xiao-Feng Cao,Bei You,Zhen Yan,Mou-Yuan Sun
	Astronomy 09 October 2016
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	Abstract:The hyperluminous X-ray source (HLX-1, the peak X-ray luminosity $sim 10^{42} m erg s^{-1}$) near the spiral galaxy ESO 243-49 is possibly the best candidate for intermediate mass black hole (IMBH), which underwent recurrent outbursts with a period of $sim 400$ days. The physical reason for this quasi-periodic variability is still unclear. We explore the possibility of radiation-pressure instability in accretion disk by modeling the light curve of HLX-1, and find that it can roughly reproduce the duration, period and amplitude of the recurrent outbursts HLX-1 with an IMBH of $sim 10^5$ Msun. Our result provides a possible mechanism to explain the recurrent outbursts in HLX-1. We further find a universal correlation between the outburst duration and the bolometric luminosity for the BH sources with a very broad mass range (e.g., X-ray binaries, XRBs, HLX-1 and active galactic nuclei, AGNs), which is roughly consistent with the prediction of radiation-pressure instability of the accretion disk. These results imply that ``heartbeat" oscillations triggered by radiation-pressure instability may appears in different-scale BH systems.
	TO cite this article:Wu Qingwen,Bozena Czerny,Mikolaj Grzedzielski, et al. The universal “heartbeat” oscillications in black hole systems accross the mass-scale[OL].[ 9 October 2016] http://en.paper.edu.cn/en_releasepaper/content/4706442


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