基于距離度量的LAMOST光譜中連續(xù)譜異常的自動(dòng)檢測(cè)
[Abstract]:Continuous spectrum anomaly refers to the serious deviation and even interruption of continuous spectrum caused by interstellar extinction and flow calibration during the acquisition and processing of stellar spectra. This has a negative effect on spectral line extraction and other subsequent processing. This paper presents an automatic detection method of abnormal spectrum of continuous spectrum based on distance measurement. Compared with traditional human eye inspection, it can improve the working efficiency greatly. In this method, the star type of the spectrum is determined by the lick line index of the spectrum, and the measured spectrum is normalized, then the continuous spectrum of the measured spectrum and the corresponding template spectrum are extracted respectively. Finally, the continuous spectral template matching is carried out, the flux difference between the measured spectrum and its template spectrum is calculated at each wavelength point, the distribution of the flow difference is analyzed, and the number of difference points is tested in the range of 鹵偽 standard deviation (未) near the mean value (尾). Furthermore, it is possible to determine whether there is a continuous spectrum anomaly. The experimental results show that the proposed method can quickly and effectively identify the abnormal spectra of stars.
【作者單位】: 山東大學(xué)(威海)機(jī)電與信息工程學(xué)院;中國(guó)科學(xué)院光學(xué)天文重點(diǎn)實(shí)驗(yàn)室國(guó)家天文臺(tái);
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(U1431102)資助
【分類號(hào)】:P111;P144.1
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