Rotational periods of four roAp stars
- Author(s)
- Tanya A. Ryabchikova, Gregg A. Wade, M Auriere, Stefano Bagnulo, Jean Francois Donati, Sandra V. Jeffers, N Johnson, John Darlington Landstreet, Francois Lignieres, Theresa Rank-Lüftinger, S Marsden, D Mouillet, Frédéric Paletou, Peter Reegen, J Silvester, S Strasser, N Toque
- Abstract
Forty-five new measurements of the mean longitudinal magnetic fields and mean equivalent widths of 4 roAp stars have obtained using the MuSiCoS spectropolarimcter 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 (Prot = 12.45877 ‘ 0.00016 d, crucial for interpretation of upcoming MOST observations of this star), new rotational periods for HD 12098 and HD 122970 (Prot = 5.460 ‘ 0.001 d and Prot = 3.877 ‘ 0.001 d, respectively) and evidence for an extremely long period for HD 176232.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Russian Academy of Sciences, Royal Military College of Canada, Observatoire Midi-Pyrénées, European Southern Observatory (Germany), University of St. Andrews, University of Western Ontario, Queen’s University, University of Minnesota, Twin Cities
- Journal
- Astronomy & Astrophysics
- Volume
- 429
- ISSN
- 0004-6361
- Publication date
- 2005
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ec885233-51bb-44b3-a8de-55efe9ce12bb