J/A+A/567/A28 HARPSpol magnetic massive stars (Alecian, 2014)
Discovery of new magnetic early-B stars within the MiMeS HARPSpol survey.
Alecian E., Kochukhov O., Petit V., Grunhut J., Landstreet J., Oksala M.E.,
Wade G.A., Hussain G., Neiner C., Bohlender D., MiMeS collaboration
<Astron. Astrophys. 567, A28 (2014)>
=2014A&A...567A..28A 2014A&A...567A..28A
ADC_Keywords: Stars, Be ; Magnetic fields ; Spectroscopy
Keywords: stars: massive - stars: magnetic field - stars: chemically peculiar
Abstract:
The Magnetism in Massive Stars (MiMeS) project aims at understanding
the origin of the magnetic fields in massive stars as well as their
impact on stellar internal structure, evolution, and circumstellar
environment.
One of the objectives of the MiMeS project is to provide stringent
observational constraints on the magnetic fields of massive stars;
however, identification of magnetic massive stars is challenging, as
only a few percent of high-mass stars host strong fields detectable
with the current instrumentation. Hence, one of the first objectives
of the MiMeS project was to search for magnetic objects among a large
sample of massive stars, and to build a sub-sample for in-depth
follow-up studies required to test the models and theories of fossil
field origins, magnetic wind confinement and magnetospheric
properties, and magnetic star evolution.
We obtained high-resolution spectropolarimetric observations of a
large number of OB stars thanks to three large programs (LP) of
observations that have been allocated on the high-resolution
spectropolarimeters ESPaDOnS, Narval, and the polarimetric module
HARPSpol of the HARPS spectrograph.
Description:
List of lines used to compute the least-squares deconvolved (LSD)
profiles of our star sample.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 95 9 List of the observed stars (8 magnetic early-B stars
and 1 with no detected magnetic field)
obs.dat 36 34 Observed longitudinal magnetic field
mask1.dat 34 168 LSD mask of HD 66765
mask2.dat 34 217 LSD mask of HD 67621
mask3.dat 34 313 LSD mask of HD 109026
mask4.dat 34 216 LSD mask of HD 121743
mask5.dat 34 210 LSD mask of HD 132058 (no magnetic field)
mask6.dat 34 166 LSD mask of HD 133518
mask7.dat 34 94 LSD mask of HD 147932
mask8.dat 34 235 LSD mask of HD 156324
mask9.dat 34 100 LSD mask of HD 156424
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See also:
J/MNRAS/390/545 : Magnetic field and velocity of early M dwarfs (Donati+ 2008)
J/MNRAS/426/2738 : Magnetic properties of ω Ori (Neiner+, 2012)
J/A+A/545/A119 : Stromgren v photometry of σ Lup (Henrichs+, 2012)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number of the star
11- 12 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
14- 15 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
17- 21 F5.2 s RAs Simbad Second of Right Ascension (J2000.0)
23 A1 --- DE- Simbad Sign of the Declination (J2000.0)
24- 25 I2 deg DEd Simbad Degree of Declination (J2000.0)
27- 28 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
30- 33 F4.1 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
35- 39 F5.3 mag Bmag Simbad B band magnitude
41- 45 F5.3 mag Vmag Simbad V band magnitude
47- 54 A8 --- SpType Simbad MK spectral type
56- 64 A9 --- FileName Name of the table with LSD mask
66- 70 I5 K Teff [16000/22000]? Adopted effective temperature
72- 74 F3.1 [cm/s2] logg [4.0]? Adopted surface gravity
76- 79 F4.1 km/s vbin [1.4/10]? Velocity step used in LSD computation
81- 84 I4 km/s vmin ? Lower limit of the integration vint
86- 88 I3 km/s vmax ? Upper limit of the integration vint
90 A1 --- n_HD [a] indicates Hα in emission
92 A1 --- l_Bp [>] Limit on polar magnetic field
93- 95 F3.1 dT Bp ? Polar magnetic field for non-spectroscopic
binaries (in kGauss)
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Byte-by-byte Description of file: mask*.dat
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Bytes Format Units Label Explanations
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2- 9 F8.4 nm lambda [370/964] Wavelength λ
13- 18 A6 --- Ion Element and ionization stage
22- 26 F5.3 --- D [0/1] Intrinsic depth, in continuum intensity
(Ic) units
30- 34 F5.3 --- g [0.4/2.7] Lande factor
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Byte-by-byte Description of file: obs.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number of star
10- 19 F10.5 d ObsDate [5907/6463] Observation date (HJD-2450000)
22- 26 I5 --- S/N [340/20000] Signal-to-noise ratio
in least-square deconvolution
28- 32 I5 10-4T Bl [-1050/640]?=- Longitudinal magnetic field Bl
(in Gauss)
34- 36 I3 10-4T e_Bl ?=- Mean error on Bl
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Acknowledgements:
Evelyne Alecian, evelyne.alecian(at)obs.ujf-grenoble.fr
(End) Evelyne Alecian [Obs. Grenoble], Patricia Vannier [CDS] 07-May-2014