Cover Picture: Astron. Nachr. 4/2024

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astronomische Nachrichten Pub Date : 2024-05-06 DOI:10.1002/asna.20249013

Manfred Küker, S. P. Järvinen, S. Hubrig, Ilya Ilyin, M. Schöller

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引用次数: 0

Abstract

Variability of the Hα emission line profile of the magnetic O-type star HD 54897 over one decade, from 2014 to 2024. In the left panels, each profile is plotted with a different color as is indicated in the legend, showing the corresponding observing date and instrument used: H: HARPS, E: ESPaDOnS, U: UVES, and P: PEPSI. The upper panel shows the profiles based on the spectra observed recently, while the bottom panel shows all available profiles published previously. The right panel shows the same data in a color scale plot. The red color corresponds to the strongest emission, while the blue color shows the Hα line wings appearing in absorption. The observed Hα emission is thought to originatein a disk of increased gas density in the equatorial plane of the magnetic field. For details see the article by Küker et al., this issue, e230169.

Abstract Image

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封面图片：Astron.Nachr.4/2024

磁性 O 型恒星 HD 54897 的 Hα 发射线剖面在 2014 年到 2024 年这十年间的变化情况。在左侧面板中，每个剖面图都用不同的颜色绘制，如图例所示，显示相应的观测日期和使用的仪器：H：HARPS，E：ESPaDOnS，U：UVES，P：PEPSI。上图显示的是基于最近观测到的光谱的剖面图，下图显示的是以前发表的所有可用剖面图。右图显示的是相同数据的色标图。红色代表最强的发射，蓝色代表在吸收中出现的 Hα 线翼。观测到的 Hα 发射被认为是源于磁场赤道面上气体密度增加的圆盘。详见 Küker 等人的文章，本期，e230169。

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

Astronomische Nachrichten 地学天文-天文与天体物理

CiteScore

1.80

自引率

11.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Astronomische Nachrichten, founded in 1821 by H. C. Schumacher, is the oldest astronomical journal worldwide still being published. Famous astronomical discoveries and important papers on astronomy and astrophysics published in more than 300 volumes of the journal give an outstanding representation of the progress of astronomical research over the last 180 years. Today, Astronomical Notes/ Astronomische Nachrichten publishes articles in the field of observational and theoretical astrophysics and related topics in solar-system and solar physics. Additional, papers on astronomical instrumentation ground-based and space-based as well as papers about numerical astrophysical techniques and supercomputer modelling are covered. Papers can be completed by short video sequences in the electronic version. Astronomical Notes/ Astronomische Nachrichten also publishes special issues of meeting proceedings.