The log-spectral distance (LSD), also referred to as "log-spectral distortion" is a distance measure (expressed in dB) between two spectra. The log-spectral distance between spectra and is defined as:
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Itakura–Saito distance — The Itakura–Saito distance is a measure of the perceptual difference between an original spectrum P(omega) and an approximation hat{P}(omega) of that spectrum. It was proposed by Fumitada Itakura and Shuzo Saito in the 1970s while they were with… … Wikipedia
Cosmic distance ladder — * Light green boxes: Technique applicable to star forming galaxies. * Light blue boxes: Technique applicable to Population II galaxies. * Light Purple boxes: Geometric distance technique. * Light Red box: The planetary nebula luminosity function… … Wikipedia
Extragalactic distance scale — The extragalactic distance scale is a series of techniques used today by astronomers to determine the distance of cosmological bodies (beyond our own galaxy) not easily obtained with traditional methods. Some procedures utilize properties of… … Wikipedia
Minimum distance estimation — (MDE) is a statistical method for fitting a mathematical model to data, usually the empirical distribution. Contents 1 Definition 2 Statistics used in estimation 2.1 Chi square criterion … Wikipedia
Module de distance — En astronomie, on appelle module de distance la différence entre la magnitude apparente m et la magnitude absolue M d un astre (toutes deux calculées dans un même domaine spectral donné). Il se note généralement avec la lettre grecque μ. Le… … Wikipédia en Français
LSD (disambiguation) — LSD is the abbreviation for the hallucinogenic drug lysergic acid diethylamide, also known as acid .LSD or L.S.D. may also mean:As the name of a place, person, or group* Lake Shore Drive, a famous road in Chicago * Louisiana School for the Deaf,… … Wikipedia
Music and mathematics — and in 2009 when fabeso donwizzle entered chaney high he would have changes the awesomeness of the school forever! A spectrogram of a violin waveform, with linear frequency on the vertical axis and time on the horizontal axis. The bright lines… … Wikipedia
analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… … Universalium
star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… … Universalium
IK Pegasi — Starbox begin name=IK Pegasi Starbox image caption=Location of IK Pegasi. Starbox observe epoch=J2000 ra=RA|21|26|26.6624cite web title=SIMBAD Query Result: HD 204188 Spectroscopic binary publisher=Centre de Données astronomiques de Strasbourg… … Wikipedia
