| KHALACK, V., C. LOVEKIN, D.M. BOWMAN, O. KOBZAR, A. DAVID-URAZ, Ernst PAUNZEN, J. SIKORA, P. LENZ, O. KOCHUKHOV, D.L. HOLDSWORTH a G.A. WADE. Rotational and pulsational variability in the TESS light curve of HD 27463. Monthly Notices of the Royal Astronomical Society. MALDEN: WILEY, 2019, roč. 490, č. 2, s. 2102-2111. ISSN 0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stz2782. |
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@article{1641456,
author = {Khalack, V. and Lovekin, C. and Bowman, D.M. and Kobzar, O. and DavidandUraz, A. and Paunzen, Ernst and Sikora, J. and Lenz, P. and Kochukhov, O. and Holdsworth, D.L. and Wade, G.A.},
article_location = {MALDEN},
article_number = {2},
doi = {http://dx.doi.org/10.1093/mnras/stz2782},
keywords = {stars: magnetic field; stars: rotation; stars: oscillations; stars: fundamental parameters; stars: chemically peculiar; stars: individual: HD 27463},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {Rotational and pulsational variability in the TESS light curve of HD 27463},
url = {https://arxiv.org/pdf/1910.00512.pdf},
volume = {490},
year = {2019}
}
TY - JOUR
ID - 1641456
AU - Khalack, V. - Lovekin, C. - Bowman, D.M. - Kobzar, O. - David-Uraz, A. - Paunzen, Ernst - Sikora, J. - Lenz, P. - Kochukhov, O. - Holdsworth, D.L. - Wade, G.A.
PY - 2019
TI - Rotational and pulsational variability in the TESS light curve of HD 27463
JF - Monthly Notices of the Royal Astronomical Society
VL - 490
IS - 2
SP - 2102-2111
EP - 2102-2111
PB - WILEY
SN - 00358711
KW - stars: magnetic field
KW - stars: rotation
KW - stars: oscillations
KW - stars: fundamental parameters
KW - stars: chemically peculiar
KW - stars: individual: HD 27463
UR - https://arxiv.org/pdf/1910.00512.pdf
L2 - https://arxiv.org/pdf/1910.00512.pdf
N2 - The new photometric data on pulsating Ap star HD 27463 obtained recently with the Transiting Lroplanet Survey Satellite (TESS) are analysed to search for variability. Our analysis shows that HD 27463 exhibits two types of photometric variability. The low -frequency variability with the period P = 2.834 274 +/- 0.000 008 d can be explained in terms of axial stellar rotation assuming the oblique magnetic rotator model and presence of surface abundance/brightness spots, while the detected high -frequency variations are characteristics of fi Scud pulsations. From the analysis of Balmer line profiles visible in Iwo FEROS spectra of HI) 27463 we have derived its effective temperature and surface gravity, finding values that are close to those published for this star in the TESS Input Catalogue (TIC). Knowing the rotation period and the v sin i value estimated from the fitting of Balmer line profiles we found that the rotational axis is inclined to the line of sight with an angle of i = 33 +/- 8 deg. Our best -fitting model of the observed pulsation modes results in an overshoot parameter value = 0.014 and values of global stellar parameters that are in good agreement with the data reported in the TIC and with the data derived from fitting Balmer line profiles. This model indicates an age of 5.0 +/- 0.4 x 10(8) yr, which corresponds to a core hydrogen fraction of 0.33.
ER -
KHALACK, V., C. LOVEKIN, D.M. BOWMAN, O. KOBZAR, A. DAVID-URAZ, Ernst PAUNZEN, J. SIKORA, P. LENZ, O. KOCHUKHOV, D.L. HOLDSWORTH a G.A. WADE. Rotational and pulsational variability in the TESS light curve of HD 27463. \textit{Monthly Notices of the Royal Astronomical Society}. MALDEN: WILEY, 2019, roč.~490, č.~2, s.~2102-2111. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stz2782.
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