نتایج جستجو برای: white and ramhormoz masses
تعداد نتایج: 16855479 فیلتر نتایج به سال:
Background: Mediastinum includes the vital organs like the heart the major respiratory passages and the major vessels due to this vicinity, the masses of this area with malignant or benign etiology or cause systemic diseases such as metastatic malignancies or granulomatous reactions can be potentially fatal. Materials and Methods: According to the priority of the problem, a ten years comprehens...
White dwarf masses can be determined in several ways. Here we compare masses obtained from Balmer line spectroscopy with those derived from trigonometric parallax measurements for an ensemble of cool hydrogenatmosphere white dwarfs. 1. Fitting Technique Our photometric and spectroscopic sample is composed of all DA stars in the trigonometric parallax sample of Bergeron, Leggett, & Ruiz (2001; B...
The instability and mobility of sand dunes is a major concern of planning and management in arid coastal plains. The aim of this study is to identify morphogenetic characteristics of sand masses and their locations, as well as to identify the processes that formed and transported them in the western part of the Makran coastal plain. Research data and tools were including spatial distributions o...
The initial-final mass relation represents a mapping between the mass of a white dwarf remnant and the mass that the hydrogen burning main-sequence star that created it once had. The empirical relation thus far has been constrained using a sample of ∼40 stars in young open clusters, ranging in initial mass from ∼2.75 – 7 M⊙, and shows a general trend that connects higher mass main-sequence star...
the classification and imaging appearances of vascular masses of the head and neck are reviewed. the radiological appearances of congenital vascular masses (infantile haemangiomas and other congenital vascular tumours, high-flow and low-flow vascular malformations), acquired vascular masses (benign and malignant tumours, non-neoplastic lesions) and other hypervascular masses are described and i...
The initial-final mass relation represents a mapping between the mass of a white dwarf remnant and the mass that the hydrogen burning main-sequence star that created it once had. The relation thus far has been constrained using a sample of ∼40 stars in young open clusters, ranging in initial mass from ∼2.75 – 7 M⊙, and shows a general trend that connects larger mass main-sequence stars with lar...
Type Ia supernovae (SNe Ia) can be used as the standard candlelight to determine the cosmological distances because they are thought to have a uniform fuel amount. Recent observations of several overluminous SNe Ia suggest that the white dwarf masses at supernova explosion may significantly exceed the canonical Chandrasekhar mass limit. These massive white dwarfs may be supported by rapid diffe...
background imaging plays a critical role not only in the detection, but also in the characterization of lung masses as benign or malignant. objectives to determine the diagnostic accuracy of dynamic magnetic resonance imaging (mri) in the differential diagnosis of benign and malignant lung masses. patients and methods ninety-four masses were included in this prospective study. five dynamic seri...
We have detected relativistic and/or kinematic post-Keplerian parameters of no fewer than five pulsar–white dwarf binary systems in long-term timing observations at Arecibo. We discuss the resulting constraints on pulsar and companion masses. The general trend is that the pulsar mass measurements are compatible with the canonical value of 1.35M⊙, but in most cases somewhat higher masses are pre...
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