نتایج جستجو برای: star identification
تعداد نتایج: 483510 فیلتر نتایج به سال:
In this paper, we consider the first case of formation of newborn neutron star named protoneutron star which is described with constant entropy per baryon about 1-2kB ( kB is Boltzman constant ) and lepton fraction about 0.3-0.4. In this case, by considering the neutrinos mean energy in our calculations, we compute the total energy, equation of state, mass and radius of protoneutron star. Fin...
در این پژوهش با استفاده از الگوی رگرسیونی سری زمانی غیرخطی (star)، به تبیین اثرات نامتقارن تکانه های درآمدی نفتی و سیاست های پولی بر رشد تولید حقیقی در اقتصاد ایران طی دوره ی 1388-1338 پرداخته ایم. نتایج به دست آمده متناسب با فرضیه ی اصلی پژوهش، مبنی بر عدم تقارن تکانه های مثبت و منفی درآمدهای نفتی، دلالت بر آن دارد که تکانه های منفی نسبت به تکانه های مثبت، به مراتب اثرات بیش تری بر رشد اقتصا...
We report spectroscopic observations of a new WolfRayet star not identified yet. This star is located in our Galaxy, in the Canis Majoris region and was discovered during a southern spectroscopic survey of stars previously identified as Hα emission objects. The star, SPH 2, after Schwartz, Persson & Hamann (SPH) (1990), shows the main characteristics of a WN star and a strong CIV 5808 typical o...
We identify the probable optical counterpart of the SMC supersoft source, RX J0059.2-7138, with a ∼ 14th magnitude star lying within the X-ray error circle. We present high resolution optical spectroscopy, which reveals strong HI emission and HeI absorption, indicative of a Be star. This classification is consistent with the colours we derive from optical photometry. We thus find evidence to su...
Submillimeter Array (SMA) observations of the high-mass star-forming region IRAS 18089-1732 in the 1 mm and 850 µm band with 1 GHz bandwidth reveal a wealth of information. We present the observations of 34 lines from 16 different molecular species. Most molecular line maps show significant contributions from the outflow, and only few molecules are confined to the inner core. We present and dis...
Significant baryon over meson enhancement was measured at RHIC in the intermediate transverse momentum range of pT = 2−4 GeV/c (”baryonmeson puzzle”). With STAR detector we were able to extend particle identification towards higher transverse momentum offering further insights into the particle production mechanisms at intermediate to high pT . In this paper we present results on charged pion, ...
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.
We present a study of the connection between star-forming galaxies, AGN host galaxies, and normal early-type galaxies in the Sloan Digital Sky Survey (SDSS). Using the SDSS DR5 and DR4plus data, we select our early-type galaxy sample in the color versus color-gradient space, and we classify the spectral types of the selected early-type galaxies into normal, star-forming, Seyfert, and LINER clas...
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