J/MNRAS/468/2745 Rotational properties of mCP stars (Netopil, 2017)
An investigation of the rotational properties of magnetic chemically peculiar
stars.
Netopil M.
<Mon. Not. R. Astron. Soc. 468, 2745-2756 (2017)>
=2017MNRAS.468.2745N 2017MNRAS.468.2745N (SIMBAD/NED BibCode)
ADC_Keywords: Stars, peculiar ; Stars, variable ; Rotational velocities ;
Effective temperatures
Keywords: stars: chemically peculiar - stars: evolution -
stars: magnetic field - stars: rotation
Abstract:
The magnetic chemically peculiar (mCP) stars of the upper main
sequence exhibit strong, globally organized magnetic fields that are
inclined to the rotational axis and facilitate the development of
surface abundance inhomogeneities resulting in photometric and
spectroscopic variability. Therefore, mCP stars are perfectly suited
for a direct measurement of the rotational period without the need for
any additional calibrations. We have investigated the rotational
properties of mCP stars based on an unprecedentedly large sample
consisting of more than 500 objects with known rotational periods.
Using precise parallaxes from the Hipparcos and Gaia satellite
missions, well-established photometric calibrations and
state-of-the-art evolutionary models, we have determined the location
of our sample stars in the Hertzsprung-Russell diagram and derived
astrophysical parameters such as stellar masses, effective
temperature, radii, inclinations and critical rotational velocities.
We have confirmed the conservation of angular momentum during the main
sequence evolution; no signs of additional magnetic braking were
found. The inclination angles of the rotational axes are randomly
distributed, although an apparent excess of fast rotators with
comparable inclination angles has been observed. We have found a
rotation rate of v/vcrit≥0.5 for several stars, whose
characteristics cannot be explained by current models. For the first
time, we have derived the relationship between mass and rotation rate
of mCP stars, and provide an analysis that links mass and rotation
with magnetic field strength. Our sample is unique and offers crucial
input for forthcoming evolutionary models that include the effects of
magnetic fields for upper main sequence stars.
Description:
The table includes the main parameters that are presented in the
paper. We list all compiled periods, astrophysical parameters are only
given for a subsample of CP stars as described in the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 158 1347 Rotational properties of chemically peculiar stars
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See also:
J/A+AS/103/1 : ubvy Photometry of magnetic CP stars (Adelman+ 1994)
J/A+AS/111/41 : Photometry of magnetic CP stars (North+, 1995)
J/A+AS/114/253 : uvby Photometry of Magnetic CP Stars (Adelman+, 1995)
J/A+AS/122/249 : uvby photometry of 4 CP stars (Adelman, 1997)
J/A+AS/125/65 : uvby photometry of 4 CP stars (Adelman, 1997)
J/A+AS/136/111 : uvby photometry of 4 CP stars (Adelman+, 1999)
J/A+AS/136/379 : uvby photometry of 4 CP stars (Adelman+ 1999)
J/A+AS/146/13 : uvby photometry of 4 CP stars (Adelman, 2000)
J/A+A/357/548 : ubvy Photometry of magnetic CP stars (Adelman+, 2000)
J/A+A/401/357 : uvby photometry of 2 Am and 2 mCP stars (Adelman+, 2003)
J/A+A/429/317 : uvby photometry of 1 HgMn and 3 mCP stars (Adelman+, 2005)
J/A+A/435/1099 : ubvy photometry of 4 magnetic CP stars (Adelman+, 2005)
J/other/Ap/46.234 : magnetic CP stars spatial distribution (Kudryavtsev+, 2003)
J/other/AstBu/62.244 : Magnetic field in CP stars (Glagolevskij, 2007)
J/A+A/450/763 : Evolutionary state of magnetic CP stars (Kochukhov+, 2006)
J/A+A/581/A138 : Photometric variability in magnetic CP stars (Bernhard+, 2015
J/AJ/152/104 : New photometrically variable magnetic CP stars
(Hummerich+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Main Identifier
17- 21 I5 --- RensonID ? ID - Renson & Manfroid, 2009, Cat. III/260
Renson NNNNN in simbad
23- 31 F9.5 deg RAdeg Right Ascension (J2000)
33- 41 F9.5 deg DEdeg Declination (J2000)
43- 57 A15 --- SpType ? Spectral type
59- 66 F8.3 d Per Period
68- 75 A8 --- f_Per Source of Period (1)
77- 81 F5.2 mag Vmag Visual magnitude
83- 86 F4.2 mag E(B-V) ? Interstellar reddening
88- 92 F5.3 [K] logTeff ? Mean effective temperature
94- 98 F5.3 [K] e_logTeff ? Error on logTeff
100 I1 --- o_logTeff ? Number of individual Teff values
102-105 F4.2 [Lsun] logL ? Luminosity
107-110 F4.2 [Lsun] e_logL ? Error on logL
112-115 F4.2 Msun Mass ? Mass
117-120 F4.2 Msun e_Mass ? Error on Mass
122-124 I3 km/s Veq ? Equatorial velocity
126-127 I2 km/s e_Veq ? Error on Veq
129-132 F4.2 --- v/vcrit ? Ratio Veq / critical equatorial velocity
134-137 F4.2 --- e_v/vcrit ? Error on v/vcrit
139-144 F6.2 --- sini ? Sinus of rotational axis inclination (2)
146-151 F6.2 --- e_sini ? Error on sini
153-156 F4.2 [10-4T] logBR2 ? Magnetic flux, corrected by (R/Rz)^2
158 I1 --- f_logBR2 ? Source of magnetic field strength (3)
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Note (1): Source of Period as follows:
Catalano = Renson & Catalano (2001A&A...378..113R 2001A&A...378..113R, Cat. J/A+A/378/113)
ASAS_P1 = Bernhard et al. (2015A&A...581A.138B 2015A&A...581A.138B, Cat. J/A+A/581/A138)
ASAS_P2 = Huemmerich et al. (2016AJ....152..104H 2016AJ....152..104H, Cat. J/AJ/152/104)
STEREO = Wraight et al. (2012MNRAS.420..757W 2012MNRAS.420..757W, Cat. J/MNRAS/420/757)
SWASP = Bernhard et al. (2015AN....336..981B 2015AN....336..981B)
VSX = AAVSO International Variable Star Index VSX (Cat. B/vsx)
Note (2): We note that some stars show implausible large values of sini.
Note (3): Source of magnetic field strength as follows:
1 = Mathys (2017A&A...601A..14M 2017A&A...601A..14M)
2 = Auriere et al. (2007A&A...475.1053A 2007A&A...475.1053A)
3 = Bychkov et al. (2005A&A...430.1143B 2005A&A...430.1143B)
4 = Bychkov et al. (2009MNRAS.394.1338B 2009MNRAS.394.1338B)
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Acknowledgements:
Martin Netopil, martin.netopil(at)univie.ac.at
(End) Patricia Vannier [CDS] 19-Jun-2017