light curve


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light curve

A graph of the brightness of a variable star or other variable object plotted against time, the brightness usually being expressed in terms of apparent or absolute magnitude. Different types of variable star can be distinguished by the shape of the curve; the period of the variable is one complete oscillation in brightness. The light curve of an eclipsing binary has two minima: a shallower one (the secondary minimum) and a deeper one (the primary minimum), which occurs when the brighter star is eclipsed. The minimum has a flat base if the eclipse is total or annular.

light curve

[′līt ‚kərv]
(astrophysics)
A graph showing the variations in brightness of a celestial object; the stellar magnitude is usually shown on the vertical axis, and time is the horizontal coordinate.
References in periodicals archive ?
Such a dramatic light curve should easily yield a rotation period, but initial reports of a 7--or 8-hour spin rate proved premature.
Tenders are invited for Repair/ Replacement Of Damaged Ac Sheet And North Light Curve Of Buildings Inside Factory At Vfj.
We found a hint that this was an interesting object in data from the WASP survey," said Mr Osborn, who discovered the unusual light curve.
When the stars pass in front of one another, they produce a regular pattern of pairs of dips in the light curve.
Once a nova is observed, a light curve can be compiled, and based on the curve, it is classified as either a fast, slow, very slow, or recurrent nova.
But there is simply too much data for mission scientists to examine every light curve, so they developed computer programmes to search for the signature of a planetary transit.
While photometrists have provided a very well observed lightcurve, see for example the AAVSO Light Curve Generator, (1) for the first time amateurs equipped with spectrographs have also contributed many observations.
We have been watching it, studying both its brightness and its spectrum - the rainbow light curve that acts as a fingerprint of its structure and activity.
A light curve is a graph that shows how the brightness of a star--or, in this case, a pair of stars--changes over time.
The light curve of this system characterized by two maximums at phases (0.
A further seventeen papers address eclipse-related issues of extra-solar physics, including solar and stellar eclipse mapping, line profiles during eclipse of binary stars, classification of eclipsing binaries, photometric and spectroscopic studies of the eclipsing binary, the light curve variation of the Be Star EM Cep, and determination of physical parameters of cataclysmic variables from analysis of their light curves.
Algol-type eclipsing binary systems are typically double star systems which generate a highly distinguishable light curve every 2.