Eddington, likelihood and stellar parallaxes
نویسندگان
چکیده
منابع مشابه
Inferring stellar properties using colours, parallaxes and an HRD prior
Stellar parameters – effective temperature, metallicity, interstellar extinction etc. – are typically estimated from a spectrum or multiband photometry. I outline a probabilistic method for estimating stellar parameters which uses not only the spectral energy distribution but also the apparent magnitude, parallax (if available) and the strong constraints provided by the Hertzsprung–Russell Diag...
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Three binary systems in the Hyades open cluster (51 Tau, V818 Tau, and θ2 Tau), with known metallicity and good Johnson photometric data are used to test the validity of three independent sets of stellar evolutionary tracks. A statistical method is described and applied to the colour-magnitude diagram of the six selected components, giving rise to χ2-contours in the metallicity–age plane. The e...
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ABSTRACT Astrometric surveys provide the opportunity to measure the absolute magnitudes of large numbers of stars, but only if the individual line-of-sight extinctions are known. Unfortunately, extinction is highly degenerate with stellar effective temperature when estimated from broad band optical/infrared photometry. To address this problem, I introduce a Bayesian method for estimating the in...
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We point out that although conventional stars are primarily fed by burning of nuclear fuel at their cores, in a strict sense, the process of release of stored gravitational energy, known as, Kelvin Helmholtz (KH) process is either also operational albeit at an arbitrary slow rate, or lying in wait to take over at the disruption of the nuclear channel. In fact, the latter mode of energy release ...
متن کاملDavid Eddington
ion representations such as differing prosodic templates (Crowhurst 1992, Prieto 1992) and constraint reranking (Colina 2003) have been proposed to account for these differences, as have different morphological parses (Bermúdez-Otero 2007). There are however, some concrete characteristics that are related to the dialectal differences such as whether the stem contains the diphthongs [je] and [we...
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ژورنال
عنوان ژورنال: Astronomy & Geophysics
سال: 2001
ISSN: 1366-8781,1468-4004
DOI: 10.1093/astrog/42.6.6.10-a