Occultation of the Hyades
نویسندگان
چکیده
منابع مشابه
New Photometry of the Hyades
71 Tauri (= BS 1394 = vB 141 = V777 Tau) is a rapidly rotating, F0 IV–V member of the Hyades cluster. It is the second brightest X-ray source in the cluster, after V471 Tauri, and an intensely bright coronal EUV source (Stern et al. 1995). It is a lunar occultation binary, but the secondary star (estimated by Peterson et al. 1981 to be a G4 V star in possibly a 53 day orbit) has never been seen...
متن کاملL dwarfs in the Hyades
We present the results of a proper motion survey of the Hyades to search for brown dwarfs, based on UKIDSS and 2MASS data. This survey covers ∼ 275 deg to a depth of K ∼ 15 mag, equivalent to a mass of ∼ 0.05 M⊙ assuming a cluster age of 625 Myr. The discovery of 12 L dwarf Hyades members is reported. These members are also brown dwarfs, with masses between 0.05 < M < 0.075 M⊙. A high proportio...
متن کاملSearching for Planets in the Hyades . I .
We describe a high-precision radial velocity search for jovian-mass companions to main sequence stars in the Hyades star cluster. The Hyades provides an extremely well controlled sample of stars of the same age, the same metallicity, and a common birth and early dynamical environment. This sample allows us to explore the dependence of the process of planet formation on only a single independent...
متن کاملSearching for Planets in the Hyades IV: Differential Abundance Analysis of Hyades Dwarfs
We present a differential abundance analysis of Hyades F-K dwarfs in search for evidence of stellar enrichment from accreted hydrogen deficient disk material. Metallicites and relative abundance ratios of several species have been determined. We derive a cluster mean [Fe/H] = 0.13±0.01. Two stars show abundances ∼0.2 dex larger than the cluster mean. Additionally, one star, which was added by a...
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cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1907
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/68.1.31