排序方式： 共有11条查询结果，搜索用时 531 毫秒
1.
Moiseenko K. B. Berezina E. V. Vasileva A. V. Shtabkin Yu. A. Skorokhod A. I. Elanskii N. F. Belikov I. B. 《Doklady Earth Sciences》2019,487(2):981-985
Doklady Earth Sciences - Estimates of the photochemical ozone generation rate, PQ, and the ozone production efficiency (OPE) per molecule of NOx (=NO + NO2), ∆P, are obtained for the region... 相似文献
2.
A. V. Yushchenko V. F. Gopka A. V. Shavrina V. A. Yushchenko S. V. Vasileva S. M. Andrievsky A. A. Raikov S. Kim P. Rittipruk Y. Jeong Y.-W. Kang 《Kinematics and Physics of Celestial Bodies》2017,33(5):199-216
The chemical composition of the PMMR23 red supergiant located in the Small Magellanic Cloud (SMC) is analyzed. The abundance of 35 chemical elements and the upper limits of abundance for Tl and U are found. The relative abundance of heavy elements is higher by 0.6–1.0 dex with respect to iron peak elements. The spectra of several SMC red supergiants PMMR27, PMMR28, and PMMR144—located in the region where the velocities of stars and interstellar gas are quite high— show the emission components in the wings of the hydrogen line. This emission is not detected for PMMR23. A possibility of interstellar gas accretion on the atmospheres of PMMR23 and other supergiants in Magellanic Clouds is discussed. The analysis is carried out using spectra measured at ESO 3.6 m telescope with the spectral resolving power R = 30000. 相似文献
3.
Diana Petrova Kjurkchieva Velimir Angelov Popov Doroteya Lyubenova Vasileva Nikola Ivanov Petrov 《天文和天体物理学研究(英文版)》2018,(4)
Photometric observations in Sloan g′and i′ bands of W UMa binaries NSVS 4340949,T-Dra0–00959,GSC 03950–00707,NSVS 4665041,NSVS 4803568,MM Peg,MM Com and NSVS4751449 are presented.The light curve solutions revealed that the components of each target are of G and K spectral types.The binaries of the sample have middle-contact configurations whose fillout factors are within the range 0.2–0.4.The only exception is NSVS 4751449 which is in deeper contact(fillout factor of 0.55).It precisely obeys the relation between mass ratio and fillout factor for deep,low mass ratio overcontact binaries.One of the eclipses of almost all targets(except MM Peg)is an occultation and their photometric mass ratios and solutions could be accepted with confidence.We found that the target components have almost equal temperatures but differ considerably in size and mass.The components of the partially-eclipsed MM Peg have close parameters.Our solutions reveal that NSVS 4340949,T-Dra0–00959,NSVS 4803568 and MM Com are of W subtype while GSC 03950–00707,NSVS 4665041,MM Peg and NSVS 4751449 are of A subtype.This subclassification is well-determined for all totallyeclipsed binaries.The targets confirm the trends in which W-subtype systems have smaller periods and lower temperatures than A subtype binaries. 相似文献
4.
V. F. Gopka A. V. Shavrina V. A. Yushchenko A. V. Yushchenko Ya. V. Pavlenko S. M. Andrievsky S. V. Vasileva Ch. Kim Y. Jeong Yu. P. Lyubchik 《Kinematics and Physics of Celestial Bodies》2018,34(3):123-133
The actinium abundance in the atmospheres of red supergiants PMMR23 and PMMR144 in the Small Magellanic Cloud and RM_1-667 in the Large Magellanic Cloud was estimated. The results of spectral observations with the ESO 3.6-m telescope with resolving power R = 30000 were used. Since actinium was not found in the atmospheres of PMMR23 and PMMR144, only the upper limits were set on its abundance: logN(Ac/H) <–15.1 and–15.0, respectively. The estimated abundance of actinium in the atmosphere of RM_1-667 varied with parameters of the atmospheric model from–14.1 to–13.3. The lines of ionized actinium λ 616.475 nm and λ 581.085 nm were used in this analysis. 相似文献
5.
Tarasova N. P. Makarova A. S. Vasileva E. G. Shlyakhov P. I. Zanin A. A. 《Doklady Earth Sciences》2018,480(2):818-822
This article is devoted to a model of the migration of phosphorus and its compounds between the components of the environment and the evaluation of the phosphorus load on freshwater bodies on the scale of the subjects of the Russian Federation. The results of calculations described in this article show that a number of the subjects of the Russian Federation are susceptible to a high and extremely high risk of a negative impact of anthropogenic phosphorus on freshwater bodies.
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7.
N. V. Zayakina O. B. Oleinikov T. I. Vasileva N. A. Oparin 《Geology of Ore Deposits》2015,57(8):732-736
Coalingite, Mg10Fe2(CO3)(OH)24 · 2H2O, rare Mg–Fe hydrous carbonate, has been found in the course of the mineralogical study of a disintegrated kimberlite breccia from the Manchary pipe of the Khompu–May field located in the Tamma Basin, Central Yakutia, 100 km south of Yakutsk. Coalingite occurs as small reddish brown platelets, up to 0.2 mm in size. It is associated with lizardite, chrysotile and brucite, which are typical kimberlitic assemblage. Coalingite is a supergene mineral, but in this case, it is produced by the interaction of brucite-bearing kimberlite and underground water circulating through a vertical or oblique fault zone. 相似文献
8.
Petrishchevsky A. M. Izosov L. A. Emelyanova T. A. Vasileva M. A. Lee N. S. 《Oceanology》2021,61(1):104-118
Oceanology - The geological-structural, magmatic, seismic, and thermometric models of the Earth’s crust and upper mantle of the Sea of Japan region are considered in relation to... 相似文献
9.
Yu. A. Shtabkin K. B. Moiseenko A. I. Skorokhod A. V. Vasileva M. Heimann 《Izvestiya Atmospheric and Oceanic Physics》2016,52(1):45-56
Contributions of climatically significant natural and anthropogenic emission sources in northern Eurasia to seasonal carbon monoxide (CO) variations observed at the Zotino Tall Tower Observatory (ZOTTO) in Central Siberia in 2007–2011 have quantitatively been estimated using the GEOS-Chem chemical transport model. It is shown that the formation of a stable continental pollution plume from sources in Western Europe, European Russia and southern Siberia during winter plays an important role in the regional balance of surface CO and allows one to explain 55–80% of the amplitude of the CO annual cycle observed at the ZOTTO station (~70–90 ppbv). During the warm period, the effect of the anthropogenic factor is weakly pronounced, and the background concentration of CO is regulated, first and foremost, by the oxidation of biogenic volatile organic compounds and fire activity in the region. 相似文献
10.
Estimation of the long-term groundwater recharge based on the chloride mass balance method is easy for practical applications. This method is reliable only if the atmospheric chloride deposition is known. The direct measuring of this deposition is difficult and time consuming. In this study, the chloride deposition at the catchment scale is assessed based on the export of chloride with river waters (including baseflow), as the net groundwater recharge in the studied catchments is usually low, and its contribution to the exports of salts is insignificant. For the purpose of this study, a 25-year-long time series of discharge and chloride content (from 1951 to 1975) is processed, as the quality of river waters for this period is considered natural and unaffected by human activity in the studied catchments. The obtained value of the atmospheric chloride deposition for North Bulgaria is in the range of 2.5–2.8 g/m2/a based on representative stations. This is the first estimate of the atmospheric chloride deposition in the country, which may be used for assessment of the long-term groundwater recharge in North Bulgaria. 相似文献