A BCool magnetic snapshot survey of solar-type stars

被引：152

作者：

Marsden, S. C. ^{[1
]}

Petit, P. ^{[2
,3
]}

Jeffers, S. V. ^{[4
]}

Morin, J. ^{[4
,5
,6
]}

Fares, R. ^{[7
]}

Reiners, A. ^{[4
]}

do Nascimento, J. -D., Jr. ^{[8
,9
]}

Auriere, M. ^{[2
,3
]}

Bouvier, J. ^{[10
]}

Carter, B. D. ^{[1
]}

Catala, C. ^{[11
]}

Dintrans, B. ^{[2
,3
]}

Donati, J. -F. ^{[2
,3
]}

Gastine, T. ^{[12
]}

Jardine, M. ^{[7
]}

Konstantinova-Antova, R. ^{[13
,14
]}

Lanoux, J. ^{[2
,3
]}

Lignieres, F. ^{[2
,3
]}

Morgenthaler, A. ^{[2
,3
]}

Ramirez-Velez, J. C. ^{[15
]}

Theado, S. ^{[2
,3
]}

Van Grootel, V. ^{[16
]}

机构：

[1] Univ So Queensland, Computat Engn & Sci Res Ctr, Toowoomba, Qld 4350, Australia

[2] Univ Toulouse, Inst Rech Astrophys & Planetol, UPS OMP, F-31400 Toulouse, France

[3] CNRS, Inst Rech Astrophys & Planetol, F-31400 Toulouse, France

[4] Univ Gottingen, Inst Astrophys, D-37077 Gottingen, Germany

[5] CNRS, LUPM UMR 5299, F-34095 Paris 05, France

[6] Univ Montpellier 2, F-34095 Montpellier 05, France

[7] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

[8] Univ Fed Rio Grande do Norte, Dept Fis Teor & Expt, BR-59072970 Natal, RN, Brazil

[9] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[10] UJF Grenoble 1, CNRS INSU, IPAG, UMR 5274, F-38041 Grenoble, France

[11] Observ Paris, LESIA, F-92195 Meudon, France

[12] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany

[13] Bulgarian Acad Sci, Inst Astron, BG-1784 Sofia, Bulgaria

[14] Bulgarian Acad Sci, NAO, BG-1784 Sofia, Bulgaria

[15] Univ Nacl Autonoma Mexico, Inst Astron, Coyoacan 04510, DF, Mexico

[16] Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 444卷 / 04期

关键词：

line: profiles; magnetic fields; stars: activity; SURFACE DIFFERENTIAL ROTATION; PRE-MAIN-SEQUENCE; H-ALPHA EMISSION; CHROMOSPHERIC-ACTIVITY; NEARBY STARS; STELLAR POLARIMETRY; RADIAL-VELOCITIES; PHYSICAL REALISM; DYNAMO PROCESSES; GALACTIC DISK;

D O I：

10.1093/mnras/stu1663

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a major high-resolution spectropolarimetric BCool project magnetic survey of 170 solar-type stars. Surface magnetic fields were detected on 67 stars, with 21 classified as mature solar-type stars, a result that increases by a factor of 4 the number of mature solar-type stars on which magnetic fields have been observed. In addition, a magnetic field was detected for 3 out of 18 of the subgiant stars surveyed. For the population of K-dwarfs, the mean value of vertical bar B-l vertical bar (vertical bar B-l vertical bar(mean)) was also found to be higher (5.7 G) than vertical bar B-l vertical bar(mean) measured for the G-dwarfs (3.2 G) and the F-dwarfs (3.3 G). For the sample as a whole, vertical bar B-l vertical bar(mean) increases with rotation rate and decreases with age, and the upper envelope for vertical bar B-l vertical bar correlates well with the observed chromospheric emission. Stars with a chromospheric S-index greater than about 0.2 show a high magnetic field detection rate and so offer optimal targets for future studies. This survey constitutes the most extensive spectropolarimetric survey of cool stars undertaken to date, and suggests that it is feasible to pursue magnetic mapping of a wide range of moderately active solar-type stars to improve our understanding of their surface fields and dynamos.

引用

页码：3517 / 3536

页数：20

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