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Application of random forest to stellar spectral classification
2010 3rd International Congress on Image and Signal Processing, 2010Classifying stellar spectra is an important work in astronomy. Numerous automated classification techniques have been explored for spectra data classification. But achieving high accuracy of spectral classification is still a goal of study. Random Forest is a recently available ensemble learning algorithm.
Jingchang Pan, Zhenping Yi
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UV Stellar Spectral Classification
1987Stellar observers in the ultraviolet tend to use the MK classification system as a spectral reference also in this spectral range, implying that it characterizes the whole spectrum, even if it is defined only from the visible range. However, an analysis of about two thousand spectra collected by the S2/68 experiment on board the TD1 satellite showed ...
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Cooperative AI Techniques for Stellar Spectra Classification
2006This chapter describes a hybrid approach to the unattended classification of low-resolution optical spectra of stars. The classification of stars in the standard MK system constitutes an important problem in the astrophysics area, since it helps to carry out proper stellar evolution studies. Manual methods, based on the visual study of stellar spectra,
Alejandra Rodriguez +4 more
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Automated classification of stellar spectra
2020Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2020, Tutor: Josep Maria Solanes ...
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A Stratified Approach for Automatic Stellar Spectra Classification
2008 Congress on Image and Signal Processing, 2008In this paper we present an automatic stellar spectra classification system to achieve two goals: one is the main-class and subclass classification, the other is luminosity type recognition. The system is composed of 3 functional units, namely main-class and subclass classification, continuum spectra normalization, luminosity type determination.
J. N. Zhang, L. P. Tu, A-Li Luo
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New classification and basic stellar parameter of SW Equulei
Astronomische Nachrichten, 2013AbstractWe review the classification of the variable star SW Equulei, formerly classified as a close binary of the W UMa type with a period of 0.83632 d and components of spectral types O–A or F–G and later. New observations indicate that the light curve is not that of an eclipsing binary but of a pulsating star with a period half of the old value ...
M. Hünsch, O. Behre
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What Stellar Classification Tells Us
2009When Bunsen and Kirchoff observed the stars spectroscopically, they opened up a new field of observation, and stellar spectroscopy soon became a routine. What the astronomers discovered was a bewildering variety of stellar spectra, to the point of confusion and disarray.
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Current treatment and recent progress in gastric cancer
Ca-A Cancer Journal for Clinicians, 2021Smita S Joshi, Brian D Badgwell
exaly
Management of glioblastoma: State of the art and future directions
Ca-A Cancer Journal for Clinicians, 2020Aaron C Tan +2 more
exaly
Classification of Stellar Spectra
Publications of the Astronomical Society of the Pacific, 1893openaire +2 more sources