نتایج جستجو برای: star s rothberger space
تعداد نتایج: 1228607 فیلتر نتایج به سال:
Abstract. Let G be a group of orthogonal transformations of a real Hilbert space H. Let R and W be bounded G-stable subsets ofH. Let ‖.‖R be the seminorm onH defined by ‖x‖R := supr∈R |〈r, x〉| for x ∈ H. We show that if W is weakly compact and the orbit space R/G is compact for each k ∈ N, then the orbit space W/G is compact when W is equiped with the norm topology induced by ‖.‖R. As a consequ...
Forbidden neon emission lines from small-scale microjets can probe high-energy processes in low-mass young stellar systems. We obtained spatially resolved [Ne III] spectra of the classical T Tauri Star Sz 102 using Hubble Space Telescope Imaging Spectrograph (HST/STIS) at a spatial resolution ~0".1. The blueshifted and redshifted both peak intensity within ~0".1 star gradually decay along flow ...
Abstract Since 2002, the far-ultraviolet (FUV) flux (1150–1680 Å) of Eta Carinae, monitored by Hubble Space Telescope/Space Telescope Imaging Spectrograph, has increased an order magnitude. This increase is attributed to partial dissipation a line-of-sight (LOS) occulter that blocks central core system. Across 2020 February periastron passage, changes in FUV emission show stronger wavelength de...
This paper surveys some common state space models used in macroeconomics and finance and shows how to specify and estimate these models using the SsfPack algorithms implemented in the S-PLUS module S+FinMetrics. Examples include recursive regression models, time varying parameter models, exact ARMA models and calculation of the Beveridge-Nelson decomposition, unobserved components models, stoch...
Yellow hypergiants are rare and represent a fast evolutionary stage of massive evolved stars. That evolutionary phase is characterised by a very intense mass loss, the understanding of which is still very limited. Here we report ALMA Compact Array observations of a 50″-mosaic toward the Fried Egg nebula, around one of the few Galactic yellow hypergiants IRAS 17163-3907. The emission from the 12...
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