Results 11 to 20 of about 11,637 (211)

Fundamental parameters and infrared excesses of Tycho–Gaia stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
43 pages, 50 figures, accepted ...
McDonald, I, Watson, RA, Zijlstra, AA
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Fundamental parameters of B type stars [PDF]

Proceedings of the International Astronomical Union, 2014
AbstractFundamental parameters of 26 well-studied sharp-lined single early B-type stars in OB associations and in the field within a distance of ≤400 pc from the Sun are compared to high-precision data from detached eclipsing binaries (DEBs). Fundamental parameters are derived from accurate and precise atmospheric parameters determined earlier by us ...
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Fundamental parameters of He-weak and He-strong stars [PDF]

Astronomy & Astrophysics, 2007
We carried out low resolution spectroscopic observations in the wavelength range 3400-4700 A of 20 He-weak and 8 He-strong stars to determine their fundamental parameters by means of the Divan-Chalonge-Barbier (BCD) spectrophotometric system. For a few He-weak stars we also estimate the effective temperatures and the angular diameters by integrating ...
Cidale, Lydia Sonia, Arias, María Laura, Torres, Andrea Fabiana, Zorec, J., Frémat, Y., Cruzado, Alicia   +5 more
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The fundamental parameters of the roAp star 10 Aquilae [PDF]

Astronomy & Astrophysics, 2013
Due to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap stars, systematic errors are likely to be present when determining their effective temperatures, which potentially compromises asteroseismic studies of these pulsators.
Perraut, K., Borgniet, S., Cunha, M., Bigot, L., Brandão, I., Mourard, D., Nardetto, N., Chesneau, O., Mcalister, H., ten Brummelaar, T., Sturmann, J., Sturmann, L., Turner, N., Farrington, C., Goldfinger, P.   +14 more
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Fundamental Parameters of CP Stars [PDF]

Highlights of Astronomy, 1998
The quest for accurate fundamental parameters (M, R, Teff log g, v sin i) of CP stars has been a lasting problem ever since the nature and origin of these stars has been discussed. The main reason for the difficulty lies in the anomalous colours of these stars, linked with their abundance anomalies which are responsible for complicated blocking and ...
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The fundamental parameters of the roAp star α Circini [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
Abstract We have used the Sydney University Stellar Interferometer to measure the angular diameter of α Cir. This is the first detailed interferometric study of a rapidly oscillating A (roAp) star, α Cir being the brightest member of its class.
Bruntt, H., North, J. R., Cunha, M., Brandão, I. M., Elkin, V. G., Kurtz, D. W., Davis, J., Bedding, T. R., Jacob, A. P., Owens, S. M., Robertson, J. G., Tango, W. J., Gameiro, J. F., Ireland, M. J., Tuthill, P. G.   +14 more
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Fundamental parameters and infrared excesses of Hipparcos stars [PDF]

Royal Astronomical Society. Monthly Notices, 2012
We derive the fundamental parameters (temperature and luminosity) of 107 619 Hipparcos stars and place these stars on a true Hertzsprung-Russell diagram. This is achieved by comparing BT-Settl model atmospheres to spectral energy distributions (SEDs) created from Hipparcos, Tycho, SDSS, DENIS, 2MASS, MSX, AKARI, IRAS and WISE data. We also identify and
Mcdonald, I., Zijlstra, A. A., Boyer, M. L.   +2 more
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Fundamental Parameters of Be Stars Seen Equator-On [PDF]

International Astronomical Union Colloquium, 2002
AbstractThe geometric deformation, as well as the non-uniform surface gravity and temperature distributions induced by the fast rotation, are taken into account to determine the fundamental parameters of 10 Be stars seen nearly equator-on. The stars occur in the first half of the main sequence evolutionary span, which suggests that their fast rotation ...
J. Zorec, Y. Frémat, A.M. Hubert, M. Floquet   +3 more
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The fundamental parameters of the Ap star 78 Virginis [PDF]

Astronomy & Astrophysics, 2015
Context. Determining the effective temperature of Ap stars, including the roAp stellar pulsators, is a difficult task owing to their strong magnetic field and their related spotted surfaces. It is, however, an important step towards constraining models of their complex atmosphere and testing proposed pulsation excitation mechanisms. Aims.
K. Perraut, M. Cunha, I. Brandão, J. Loridat, D. Mourard, A. Meilland, N. Nardetto, H. McAlister, T. A. ten Brummelaar, J. Sturmann, L. Sturmann, N. Turner, C. Farrington, N. Vargas   +13 more
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Fundamental parameters of eight Am stars: comparing observations with theory★ [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
In this paper we present a detailed analysis of a sample of eight Am stars, four of them are in the Kepler field of view. We derive fundamental parameters for all observed stars, effective temperature, gravity, rotational and radial velocities, and chemical abundances by spectral synthesis method.
CATANZARO, GIOVANNI, Ripepi V.
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