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OGLE-2016-BLG-1190Lb: The First<i>Spitzer</i>Bulge Planet Lies Near the Planet/Brown-dwarf Boundary
Ryu, Y.-H.,Yee, J. C.,Udalski, A.,Bond, I. A.,Shvartzvald, Y.,Zang, W.,Jaimes, R. Figuera,Jørgensen, U. G.,Zhu, W.,Huang, C. X.,Jung, Y. K.,Albrow, M. D.,Chung, S.-J.,Gould, A.,Han, C.,Hwang, K.-H.,Sh American Astronomical Society 2018 The Astronomical journal Vol.155 No.1
<P>We report the discovery of OGLE-2016-BLG-1190Lb, which is likely to be the first Spitzer microlensing planet in the Galactic bulge/ bar, an assignation that can be confirmed by two epochs of high-resolution imaging of the combined source-lens baseline object. The planet's mass, M-p = 13.4 +/- 0.9 M-J, places it right at the deuteriumburning limit, i. e., the conventional boundary between 'planets' and 'brown dwarfs.' Its existence raises the question of whether such objects are really ' planets' (formed within the disks of their hosts) or 'failed stars' (lowmass objects formed by gas fragmentation). This question may ultimately be addressed by comparing disk and bulge/bar planets, which is a goal of the Spitzer microlens program. The host is a G dwarf, M-host = 0.89. +/- 0.07 M-circle dot, and the planet has a semimajor axis a similar to 2.0 au. We use Kepler K2 Campaign 9 microlensing data to break the lens-mass degeneracy that generically impacts parallax solutions from Earth-Spitzer observations alone, which is the first successful application of this approach. The microlensing data, derived primarily from near-continuous, ultradense survey observations from OGLE, MOA, and three KMTNet telescopes, contain more orbital information than for any previous microlensing planet, but not quite enough to accurately specify the full orbit. However, these data do permit the first rigorous test of microlensing orbital-motion measurements, which are typically derived from data taken over < 1% of an orbital period.</P>
KMT-2016-BLG-0212: First KMTNet-Only Discovery of a Substellar Companion
K.-H. Hwang,H.-W. Kim,D.-J. Kim,A. Gould,M. D. Albrow,S.-J. Chung,C. Han,Y. K. Jung,Y.-H. Ryu,I.-G. Shin,Y. Shvartzvald,J. C. Yee,W. Zang,W. Zhu,S.-M. Cha,S.-L. Kim,C.-U. Lee,D.-J. Lee,Y. Lee,B.-G. Pa 한국천문학회 2018 Journal of The Korean Astronomical Society Vol.51 No.6
We present the analysis of KMT-2016-BLG-0212, a low flux-variation $(I_{\rm flux-var}\sim 20$ mag) microlensing event, which is in a high-cadence ($\Gamma = 4 {\rm hr}^{-1}$) field of the three-telescope Korea Microlensing Telescope Network (KMTNet) survey. The event shows a short anomaly that is incompletely covered due to the brief visibility intervals that characterize the early microlensing season when the anomaly occurred. We show that the data are consistent with two classes of solutions, characterized respectively by low-mass brown-dwarf $(q=0.037)$ and sub-Neptune $(q<10^{-4})$ companions. Future high-resolution imaging should easily distinguish between these solutions.
Two Jupiter-mass Planets Discovered by the KMTNet Survey in 2017
Shin, I.-G.,Ryu, Y.-H.,Yee, J. C.,Gould, A.,Albrow, M. D.,Chung, S.-J.,Han, C.,Hwang, K.-H.,Jung, Y. K.,Shvartzvald, Y.,Zang, W.,Lee, C.-U.,Cha, S.-M.,Kim, D.-J.,Kim, H.-W.,Kim, S.-L.,Lee, Y.,Lee, D.- American Astronomical Society 2019 The Astronomical journal Vol.157 No.4
OGLE-2016-BLG-0613LABb: A Microlensing Planet in a Binary System
Han, C.,Udalski, A.,A., Gould,Lee, C.-U.,Shvartzvald, Y.,Zang, W. C.,Mao, S.,Kozłowski, S.,Albrow, M. D.,Chung, S.-J.,Hwang, K.-H.,Jung, Y. K.,Kim, D.,Kim, H.-W.,Ryu, Y.-H.,Shin, I.-G.,Yee, J. C.,Zhu, American Astronomical Society 2017 The Astronomical journal Vol.154 No.6
<P>We present the analysis of OGLE-2016-BLG-0613, for which the lensing light curve appears to be that of a typical binary-lens event with two caustic spikes but with a discontinuous feature on the trough between the spikes. We find that the discontinuous feature was produced by a planetary companion to the binary lens. We find four degenerate triplelens solution classes, each composed of a pair of solutions according to the well-known wide/close planetary degeneracy. One of these solution classes is excluded due to its relatively poor fit. For the remaining three pairs of solutions, the most-likely primary mass is about M-1 similar to 0.7M(circle dot) , while the planet is a super Jupiter. In all cases, the system lies in the Galactic disk, about halfway toward the Galactic bulge. However, in one of these three solution classes, the secondary of the binary system is a low- mass brown dwarf, with relative mass ratios (1: 0.03: 0.003), while in the two others the masses of the binary components are comparable. These two possibilities can be distinguished in about 2024 when the measured lens-source relative proper motion will permit separate resolution of the lens and source.</P>
Spontaneous Chemical Vapor Growth of NiSi Nanowires and Their Metallic Properties
Kim, C.-J.,Kang, K.,Woo, Y. S.,Ryu, K.-G.,Moon, H.,Kim, J.-M.,Zang, D.-S.,Jo, M.-H. WILEY-VCH Verlag 2007 Advanced Materials Vol.19 No.21
<B>Graphic Abstract</B> <P>A simple and controlled growth of metallic NiSi nanowires at low temperatures (< 400 °C) by a chemical vapor deposition using SiH<SUB>4</SUB> at a low supersaturation limit is reported. It is demonstrated that the simple and low temperature synthesis of metallic nanowires is compatible with conventional Si processing and provide interesting strategies for their possible applications as interconnects in Si microelectronics and as field emitters in field emission displays. <img src='wiley_img/09359648-2007-19-21-ADMA200700609-content.gif' alt='wiley_img/09359648-2007-19-21-ADMA200700609-content'> </P>
The Nutritional Value of Brown Rice and Maize for Growing Pigs
Li, X.L.,Yuan, S.L.,Piao, X.S.,Lai, C.H.,Zang, J.J.,Ding, Y.H.,Han, L.J.,Han, In K. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.6
An experiment was designed to study the nutritional value of Chinese brown rice and maize for growing pigs. Six male grower pigs (Duroc${\times}$Landrace${\times}$Large White, $24.3{\pm}1.26$ kg average initial BW) were surgically fitted with a simple T-cannula at the terminal ileum and allotted within a $2{\times}2$ Latin square design. The pigs were fed either a maize or brown rice diet in a direct method to determine their digestibility. The brown rice used in this experiment was husked from one kind of early, long grain, and non-glutinous rice (ELGNR, indica rice: non-waxy rice, containing amylopectin and amylose) in southern China. Chromic oxide was used as a marker. The diets were supplied at about 4.0% of body weight in dry matter/d. Total faeces and urine were collected on days 4 and 5; digesta was collected on days 6-8 in each period. The average body weight was 24.3 kg at the start of the experiment and 27.6 kg at the end. The results showed that the apparent ileal digestibilities of most amino acids of brown rice were significantly higher than those in maize (p<0.01), as were the apparent ileal digestibilities of crude protein (CP), digestible energy (DE), organic matter (OM) and dry matter (DM) (p<0.05). However, the apparent ileal starch digestibilities of the two treatments were similar (p>0.05). The values of the apparent faecal digestibilities derived from the two methods, marker and total faecal-collection methods, were very similar and also correlated with each other. The difference in absolute value of the apparent faecal digestibilities between brown rice and maize was smaller compared to that of the apparent ileal digestibilities. The net protein utilization was higher (p = 0.07) and the DE metabolizable rate was significantly higher (p<0.01) for brown rice than for maize. The metabolizable energy (ME) of brown rice is similar to that of maize, while the DE of brown rice was relatively lower. It can be concluded that Chinese brown rice are better than maize not only in apparent ileal digestibilities, but also in metabolizable rate of amino acids and gross energy under the present study conditions.