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J/A+A/430/1143     Stellar magnetic rotational phase curves     (Bychkov+, 2005)

A catalog of stellar magnetic rotational phase curves. Bychkov V.D., Bychkova L.V., Madej J. <Astron. Astrophys., 430, 1143-1154 (2005)> =2005A&A...430.1143B
ADC_Keywords: Stars, dwarfs ; Magnetic fields Keywords: catalogs - stars: fundamental parameters - stars: magnetic fields - stars: rotation Abstract: Magnetized stars usually exhibit periodic variations of the effective (longitudinal) magnetic field Be caused by their rotation. We present a catalog of magnetic rotational phase curves, Be vs. the rotational phase phi, and tables of their parameters for 136 stars on the main sequence and above it. Phase curves were obtained by the least squares fitting of sine wave or double wave functions to the available Be measurements, which were compiled from the existing literature. Most of the catalogued objects are chemically peculiar A and B type stars (127 stars). For some stars we also improved or determined periods of their rotation. We discuss the distribution of parameters describing magnetic rotational phase curves in our sample. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 67 157 Single wave Be phase curve parameters for all catalogued stars table2.dat 83 57 Parameter r of the dipole magnetic field. table3.dat 104 22 Double wave Be variations table4.dat 142 141 References table5.dat 111 134 Periods of magnetic stars
See also: III/162 : General Catalogue of Ap and Am stars (Renson+ 1991) J/A+A/407/631 : Catalogue of stellar effective magnetic fields (Bychkov+ 2003) J/A+AS/123/353 : Mean magnetic field modulus of Ap stars (Mathys, 1997) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 7 A1 --- n_HD [*] Note on HD (G1) 10- 17 A8 --- SpType MK spectral type 19- 23 I5 10-4T B0 Average magnetic field, in Gauss (2) 25- 27 I3 10-4T e_B0 rms uncertainty on B0, in Gauss 29- 32 I4 10-4T B1 Half of the amplitude, in Gauss (2) 34- 37 I4 10-4T e_B1 rms uncertainty on B1, in Gauss 39- 50 F12.6 d Per Period (2) 52- 60 F9.3 d T0 Julian day of zero phase (JD=T0+2400000) (2) 62- 67 F6.3 d e_T0 rms uncertainty on T0
Note (2): For all stars with an adequate number of Be determinations, and for which the period of magnetic variability Pmag was known, we have determined the best fit for the relation of Be vs. phase, Bei(phi)=B0+B1cos(phi), where phi=2*pi[(Ti-T0)/P], by the least squares method. Here B0 is the average field, B1 stands for half of the amplitude, Ti is time of measurement, P denotes the period, and T0 is the zero epoch, i.e. time corresponding to the zero phase phi. We have chosen the zero epoch T0 in such a way that the phase phi=0 corresponds to the minimum of the best fit magnetic curve.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 7 A1 --- n_HD [*] Note on HD (G1) 9- 11 I3 --- N Number of individual points 13- 15 I3 --- sigma Average scatter of Bei observation around the fitting curve 17- 23 F7.3 --- r r parameter of the dipole magnetic field (1) 25- 29 F5.3 --- e_r ?=- rms uncertainty on r 31- 33 I3 --- NV NV = N-3 (for sine wave fits) 35- 40 F6.2 --- chi2 chi2 value for one degree of freedom 42- 44 A3 --- Met Method used (G2) 47- 83 A37 --- Ref Reference of measurement, in table4.dat
Note (1): the parameter r relates both the angle β between the magnetic dipole axis and the rotational axis, and the angle i between rotational axis and the line of sight: r = cos(β+i)/cos(β-i) = Be(min)/Be(max)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 8- 12 I5 10-4T B0 Average magnetic field (Gauss) 14- 16 I3 10-4T e_B0 rms uncertainty on B0 (Gauss) 18- 21 I4 10-4T B1 Half of the amplitude (Gauss) 23- 26 I4 10-4T e_B1 rms uncertainty on B1 (Gauss) 28- 31 I4 10-4T B2 B2 coefficient (Gauss) 33- 36 I4 10-4T e_B2 rms uncertainty on Be (Gauss) 38- 42 F5.3 --- z1 Phase shift z1 44- 48 F5.3 --- e_z1 rms uncertainty on z1 50- 54 F5.3 --- z2 Phase shift z2 56- 60 F5.3 --- e_z2 rms uncertainty on z2 62- 64 I3 --- NV NV = N-5 66- 70 F5.2 --- chi2 chi2 value 72- 74 A3 --- Met Method used (G2) 76-104 A29 --- Ref References, in table4.dat
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Ref Reference code 5- 23 A19 --- BibCode BibCode 25- 48 A24 --- Aut Author's name 50-142 A93 --- Com Comments
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD HD number 7 A1 --- n_HD [*] Note on HD (G1) 9- 20 F12.6 d Per Period 25-111 A87 --- Ref Reference
Global notes: Note (G1): The asterisk (*) indicates that the phase curve has to be fitted by a double wave, and the star is also listed in Table 3. Note (G2): Method as follows: Met = Be from metal lines Hl = Be from hydrogen lines all = both previous methods
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Jun-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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