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
收藏
页码：L55 / L58
页数：4
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