Rotational periods of four roAp stars

被引：25

作者：

Ryabchikova, T

Wade, GA

Aurière, M

Bagnulo, S

Donati, JF

Jeffers, SV

Johnson, N

Landstreet, JD

Lignières, F

Lueftinger, T

Marsden, S

Mouillet, D

Paletou, F

Petit, P

Reegen, P

Silvester, J

Strasser, S

Toque, N

机构：

[1] Univ Vienna, Inst Astron, A-1180 Vienna, Austria

[2] Russian Acad Sci, Inst Astron, Moscow 109017, Russia

[3] Royal Mil Coll Canada, Dept Phys, Kingston, ON K7K 7B4, Canada

[4] Observ Midi Pyrenees, F-65008 Tarbes, France

[5] European So Observ, Santiago 19, Chile

[6] Observ Midi Pyrenees, F-31400 Toulouse, France

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

[8] Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada

[9] ETH Zentrum, Inst Astron, CH-8092 Zurich, Switzerland

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

[11] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[12] Univ Minnesota, Dept Astron, Minneapolis, MN 55455 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2005年 / 429卷 / 03期

关键词：

stars; individual; HD; 12098; 24712; 122970; 176232; stars : peculiar; magnetic fields;

D O I：

10.1051/0004-6361:200400112

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Forty-five new measurements of the mean longitudinal magnetic fields and mean equivalent widths of 4 roAp stars have obtained using the MuSiCoS spectropolarimeter at Pic du Midi observatory. These new high-precision data have been combined with archival measurements in order to constrain the rotational periods of HD 12098, HD 24712 = HR 1217, HD 122970 and HD 176232 = 10 Aql. We report a revised rotational period for HD 24712 (P-rot = 12.45877 +/- 0.00016 d, crucial for interpretation of upcoming MOST observations of this star), new rotational periods for HD 12098 and HD 122970 (P-rot = 5.460 +/- 0.001 d and P-rot = 3.877 +/- 0.001 d, respectively) and evidence for an extremely long period for HD 176232.

引用

页码：L55 / L58

页数：4

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