نتایج جستجو برای: stars
تعداد نتایج: 56510 فیلتر نتایج به سال:
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magnetic fields play an important role in creating, driving, and in the evolution of outflows and jets from protostars and accretion disks. on the other hand, the temperature profile of the accretion disks may also affect the structure of the magnetic field and outflows. in this paper, we use the self-similar method in cylindrical coordinates to investigate the effect of the temperature profile...
In 2012 it was forty years ago that the discovery of the first X-ray binary Centaurus X-3 became known. That same year it was discovered that apart from the High-Mass X-ray Binaries (HMXBs) there are also Low-Mass X-ray Binaries (LMXBs), and that Cygnus X-1 is most probably a black hole. By 1975 also the new class of Be/X-ray binaries was discovered. After this it took 28 years before ESAs INTE...
introduction: students in elementary schools due to the physical and behavioral characteristics more than adults have exposed to environmental hazards. this study was conducted to examine the environmental health and safety indices in girls' elementary schools in ilam city. materials and methods: this cross-sectional study was carried out via census sampling method in girls' elementar...
In the present work, we have obtained the equation of state for neutron star matter considering the in uence of the ferromagnetic and antiferromagnetic spin state. We have also investigated the structure of neutron stars. According to our results, the spin asymmetry stiens the equation of state and leads to high mass for the neutron star.
stratigraphy, paleontology and paleoecology characteristics of stars valley deposits in qeshm island
stars valley is one of the tourism areas in the qeshm island and is located at the southwest of qeshm city, south eastern corner of the island. sediments forming this unique landscape are not completely lithified and is composed of marl and marly limestone which is formed by erosional and weathering processes. deposits of stars valley contain diverse assemblages of echinoids, bivalves, gastropo...
کاربرد مدل های ریاضی در طرح های مهندسی رودخانه اجتناب ناپذیر است. با این وجود، نیاز حداقل به اطلاعات صحرایی، حجم محاسباتی اندک و درجه اعتماد مدل های ریاضی در رودخانه ها باید مورد نظر قرار گیرد. هدف اصلی در تحقیق حاضر، مقایسه نتایج شبیه سازی جریان پایدار از مدل های ریاضی شناخته شده با نتایج نظیر از یک مدل فیزیکی رودخانه ای بوده است. برای این منظور، مدل فیزیکی بستر ثابت یک بازه از رودخانه نازلو (...
As is understood by the Quran, there are limitless beings in the heavens and earth a lot of which are alive. Some scholars, relying on some Quranic phrases such as animal, the rising places and the setting places, those in the heavens andBy the heaven, holding mansions of the stars, have proved the existence of conscious beings in heavens. Attributing animal to earthy animals and the quranic re...
There are several observational evidences for the existence of dark matter in the universe. More than about 90% of the matter in the universe is in a form which is not directly observable. If the dark matter is in the form of weakly interacting massive particles (WIMPs) or cosmions, part of it is captured by the Sun, other stars, and even planets. In this paper, some basic ideas of the cosmio...
Aims. In order to better model massive B-type stars, we need to understand the physical processes taking place in slowly pulsating B (SPB) stars, chemically peculiar Bp stars, and non-pulsating normal B stars co-existing in the same part of the H-R diagram. Methods. We carry out a comparative study between samples of confirmed and well-studied SPB stars and a sample of well-studied Bp stars wit...
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