منابع مشابه
Automated analysis of stellar spectra
Classical model-atmosphere analyses of stellar spectra usually begin by measuring equivalent widths, and then proceed into a loop in which 1) model spectra are calculated for a set of abundances and atmospheric parameters, and 2) observed and computed spectra are compared and corrections to the abundances and parameters are inferred. Automated techniques have been developed to automate the meas...
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Abstract. Stellar rotation influences our understanding of stellar structure and evolution, binary systems, clusters etc. and therefore the benefits of a large and highly accurate database on stellar rotation, obtained by GAIA, will be manifold. To study the prospects of GAIA measurement of projected rotational velocities vrot sin i, we use synthetic stellar spectra to simulate the determinatio...
متن کاملMeasuring total ozone from historic stellar spectra
Detection and measurement of total ozone from stellar spectra: Paper 2. Historic data from 1935–1942 R. E. M. Griffin Dept. of Earth and Space Sciences and Engineering, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada Herzberg Institute for Astrophysics, 5071 West Saanich Road, Victoria, BC, V9E 2E7, Canada Received: 22 July 2005 – Accepted: 9 September 2005 – Published: 31 Octo...
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We review the main stellar features observed in starburst spectra from the UV to the near-IR and their use as fundamental tools to determine the properties of stellar populations from integrated spectra. The origin and dependence of the features on stellar properties are discussed, and we summarise existing modeling techniques used for quantitative analysis. Recent results from studies based on...
متن کاملPhysical Parameterization of Stellar Spectra: The Neural Network Approach
We present a technique which employs artificial neural networks to produce physical parameters for stellar spectra. A neural network is trained on a set of synthetic optical stellar spectra to give physical parameters (e.g. Teff , log g, [M/H]). The network is then used to produce physical parameters for real, observed spectra. Our neural networks are trained on a set of 155 synthetic spectra, ...
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ژورنال
عنوان ژورنال: Transactions of the International Astronomical Union
سال: 1939
ISSN: 0251-107X
DOI: 10.1017/s0251107x00018538