The Chemical Composition of HD47536: A Planetary Host Halo Giant with Possible λ Bootis Features and Signs of Interstellar Matter Accretion

Abstract

We investigated the chemical composition of the planetary host halo star HD47536 via high-resolution spectral observations recorded using a 1.5 meter Cerro Tololo Inter-American Observatory (CTIO) telescope (Chile). Furthermore, we determined the abundances of 38 chemical elements. Both light and heavy elements were overabundant compared to the iron group elements. The abundance pattern of HD47536 was similar to that of halo-type stars, with an enrichment of heavy elements. We analyzed the relationships between the relative abundances of chemical elements and their second ionization potentials and condensation temperatures. We demonstrated that the interplay of charge-exchange reactions owing to the accretion of interstellar matter and the gas-dust separation mechanism can influence the initial abundances and can be used to qualitatively explain the abundance patterns in the atmosphere of HD47536.

Reliability of industrial-scale telescopes in the event of seismic failures

“…There are few works related to natural disasters applied to industrial-scale telescopes, mostly focused on astronomical studies to analyze the phenomena and celestial bodies (Ray et al, 2022;Yushchenko et al, 2022), construction or partial or total improvement of the system (Marchiori et al, 2018;Morzinski et al, 2014;Allekotte et al, 2013), fault detection (Ortiz and Carrasco, 2018;Cho et al, 2020;Wu et al, 2020;Roelf, 2022), prognosis Roelf, 2022), and decision-making in maintenance (Costa et al, 2021;, among others.…”