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

IF 0.6 Q4 ASTRONOMY & ASTROPHYSICS

Journal of Astronomy and Space Sciences Pub Date : 2022-12-01 DOI:10.5140/jass.2022.39.4.169

A. Yushchenko, D. Doikov, S. Andrievsky, Yeuncheol Jeong, V. Yushchenko, P. Rittipruk, V. Kovtyukh, A. Demessinova, V. Gopka, A. Raikov, K. S. Jeong

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引用次数: 0

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.

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HD47536的化学成分:一个可能具有λ牧夫座特征和星际物质吸积迹象的行星宿主光环巨星

利用智利Cerro Tololo Inter-American Observatory (CTIO) 1.5米望远镜记录的高分辨率光谱观测数据，研究了行星宿主光晕恒星HD47536的化学成分。此外，我们还测定了38种化学元素的丰度。与铁族元素相比，轻元素和重元素都过多了。HD47536的丰度模式与晕型恒星相似，重元素富集。我们分析了化学元素的相对丰度与其二次电离势和冷凝温度之间的关系。我们证明了由于星际物质吸积引起的电荷交换反应和气体-尘埃分离机制的相互作用可以影响初始丰度，并可用于定性解释HD47536大气中的丰度模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Astronomy and Space Sciences ASTRONOMY & ASTROPHYSICS-

CiteScore

1.30

自引率

20.00%

发文量

审稿时长

12 weeks

期刊介绍： JASS aims for the promotion of global awareness and understanding of space science and related applications. Unlike other journals that focus either on space science or on space technologies, it intends to bridge the two communities of space science and technologies, by providing opportunities to exchange ideas and viewpoints in a single journal. Topics suitable for publication in JASS include researches in the following fields: space astronomy, solar physics, magnetospheric and ionospheric physics, cosmic ray, space weather, and planetary sciences; space instrumentation, satellite dynamics, geodesy, spacecraft control, and spacecraft navigation. However, the topics covered by JASS are not restricted to those mentioned above as the journal also encourages submission of research results in all other branches related to space science and technologies. Even though JASS was established on the heritage and achievements of the Korean space science community, it is now open to the worldwide community, while maintaining a high standard as a leading international journal. Hence, it solicits papers from the international community with a vision of global collaboration in the fields of space science and technologies.