Results 11 to 20 of about 670,593 (311)
Accurate Fundamental Stellar Parameters [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractWe combine results from interferometry, asteroseismology and spectroscopic analyses to determine accurate fundamental parameters (mass, radius and effective temperature) of 10 bright solar-type stars covering the H-R diagram from spectral type F5 to K1. Using “direct” techniques that are only weakly model-dependent we determine the mass, radius
Bruntt, H.
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Nonlinear estimation of the fundamental matrix with minimal parameters [PDF]
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2004 The purpose of this paper is to give a very simple method for nonlinearly estimating the fundamental matrix using the minimum number of seven parameters. Instead of minimally parameterizing it, we rather update what we call its orthonormal representation, which is based on its singular value decomposition.
Adrien Bartoli, Peter F. Sturm
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The Homogeneous Study of Transiting Systems (HoSTS) – II. The influence of the line list on stellar parameters [PDF]
, 2017 The use of high-resolution, high signal-to-noise stellar spectra is essential in order to determine the most accurate and precise stellar atmospheric parameters via spectroscopy.
Smalley
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Open Astronomy, 2011 Interstellar extinction is investigated in a 1.5 square degree area of the Cepheus Flare in the direction of the dark cloud TGU 619 at ℓ=102.5°, b=+15.5°.
Zdanavičius K. +4 more
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FUNDAMENTAL PARAMETERS AND CHEMICAL COMPOSITION OF ARCTURUS [PDF]
The Astrophysical Journal, 2011 We derive a self-consistent set of atmospheric parameters and abundances of 17 elements for the red giant star Arcturus: Teff = 4286+/-30 K, logg = 1.66+/-0.05, and [Fe/H] = -0.52+/-0.04. The effective temperature was determined using model atmosphere fits to the observed spectral energy distribution from the blue to the mid-infrared (0.44 to 10 um ...
Ramirez, I., Prieto, C. Allende
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Setting Up of the Strömvil System Standards and Standard Regions
Open Astronomy, 2003 CCD photometry of standard areas of the seven-color Strömvil photometric system in some open and globular clusters is described. The primary standards are being measured with a two-channel photoelectric photometer on the 1.5 meter telescope on Mt. Lemmon.
Philip A. G. Davis +3 more
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Some Photometric Characteristics of Population II Orbital Visual Binary Stars
Open Astronomy, 2003 A MV ,B−V diagram for metal-deficient, kinematically selected thick disk and halo visual binary stars with known orbits is presented. The magnitude differences Δm between the components are analyzed.
Bartkevičius A., Gudas A.
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Cross Catalogue Matching with Virtual Observatory and Parameterization of Stars
Open Astronomy, 2012 Virtual Observatory facilities allow users to make a fast and correct cross-matching of objects from various surveys. They yield multi-color photometry data (color indices) on registered objects and make it possible to determine stellar parameters.
Malkov O. +6 more
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Fundamental Parameters of Cepheids [PDF]
International Astronomical Union Colloquium, 1985 In the two centuries since the discovery of δ Cephei and η Aquilae, the study of Cepheids, and of pulsating stars in general, has become a very important field in astronomy. The usefulness of Cepheids, both as distance indicators and as test objects for stellar astrophysics, has been amply demonstrated, and if one just looks at the flood of papers on ...
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Challenges in inferring spectroscopic fundamental stellar parameters
, 2023 Fundamental stellar parameters are key for the understanding of many different fields in Astrophysics. There are several techniques available that can be used to characterize fundamental stellar parameters.
Sousa, Sérgio
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