New evidence for weak magnetic fields in Herbig Ae/Be stars

被引：14

作者：

Jaervinen, S. P. ^{[1
]}

Carroll, T. A. ^{[1
]}

Hubrig, S. ^{[1
]}

Ilyin, I. ^{[1
]}

Schoeller, M. ^{[2
]}

机构：

[1] Leibniz Inst Astrophys Potsdam AIP, Stentwarte 16, D-14482 Potsdam, Germany

[2] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 489卷 / 01期

关键词：

stars:; individual:; HD58647; HD98922; HD139614; HD165133; HD190073; stars: magnetic field; stars: pre-main-sequence; stars: variables: T Tauri; Herbig Ae/Be; SPECTROPOLARIMETRIC OBSERVATIONS; INNER DISKS; AE; EMISSION;

D O I：

10.1093/mnras/stz2190

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In recent years Herbig Ae/Be stars receive considerable attention as their discs are believed to be the sites of on-going planet formation. Confirming the presence of magnetic fields in these stars is critical for understanding the transport of angular momentum during the protostellar phase. Furthermore, magnetic fields set the conditions for strongly anisotropic accretion. In this study we present the results of our recent observing campaigns of a sample of Herbig Ae/Be stars aimed at measurements of their magnetic fields applying the Singular Value Decomposition (SVD) method to high resolution spectropolarimetric observations. The strongest longitudinal magnetic field of 209G is detected in the Herbig Be star HD58647, whereas the weakest field of 17G is measured in the Herbig Ae star HD190073. A change of polarity is detected for HD58647 and in the Herbig Be star HD98922. The obtained results provide further evidence that Herbig Ae/Be stars possess much weaker magnetic fields than their lower mass counterpart T Tauri stars with magnetic fields of kG order.

引用

页码：886 / 890

页数：5

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