(R-I) colors of cepheids and yellow supergiants in open clusters.
نویسندگان
چکیده
منابع مشابه
Yellow Giants in Young Clusters. Ii. a Comparison of Observation with Theory
Luminosities and effective temperatures are calculated for 17 nonvariable yellow giants and supergiants and nine Cepheids which were previously identified as members of open clusters. These stars are identified as being in the helium core burning stage of evolution. A comparison with the predictions of pulsation theory does not show any disagreement. O n the other hand, several comparisons with...
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این تحقیق به بررسی استراتژیهای بکاررفته توسط مترجمین مختلف در ترجمه واژه های فرهنگی خاص در ترجمه فارسی به انگلیسی قانون مدنی و قانون اساسی جمهوری اسلامی ایران میپردازد.این تحقیق بر اساس نظریه پیتر نیومارک صرت گرفته است. در این تحفیق واژه های فرهنگی خاص اقتباس شده و پس از مقایسه با متن مبدا به بررسی انها پرداخته می شود.در قسمت ضمائم تحقیق واژه نامه ای برای اشنایی خوانندگان با لغات و اصطلاحات حقو...
Yellow Supergiants in the Andromeda Galaxy (M31) 1
The yellow supergiant content of nearby galaxies can provide a critical test of stellar evolution theory, bridging the gap between the hot, massive stars and the cool red supergiants. But, this region of the color-magnitude diagram is dominated by foreground contamination, requiring membership to somehow be determined. Fortunately, the large negative systemic velocity of M31, coupled to its hig...
متن کاملMobile Metal - Metal Bonds : Studies on Mixed Valence I r 3 and I r 4 Clusters
The dicationic clusters [(CsMes)41r4S4]2+ ( [112+) and [(C5Me5)31r3S~]2+ ([2]*+) were prepared by treatment of [ (C5Me~)IrCl2]2 with (Me3Si)zS followed by ion exchange chromatography. Crystallographic characterization of the tetrairidium cluster [ 112+ reveals a cubane motif consisting of interpenetrated Ir4 and S4 tetrahedra. The Ir4 core is distorted from idealized tetrahedral symmetry by vir...
متن کاملNew Period-Luminosity and Period-Color Relations of Classical Cepheids: I. Cepheids in the Galaxy
321 Galactic fundamental-mode Cepheids with good B,V , and (in most cases) I photometry by Berdnikov et al. (2000) and with homogenized color excesses E(B−V) based on Fernie et al. (1995) are used to determine their period-color (P-C) relation in the range 0.4 < log P ∼ < 1.6. The agreement with colors from different model calculations is good to poor. – Distances of 25 Cepheids in open cluster...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1976
ISSN: 0004-637X,1538-4357
DOI: 10.1086/154099