brightness fluctuation造句

• The surface brightness fluctuation ( SBF ) method takes advantage of the use of CCD cameras on telescopes.
• The surface brightness fluctuations distance measurement technique estimates distances to galaxies based on the graininess of their appearance.
• In 1993 Gerard Luppino and John Tonry used surface brightness fluctuations to derive a new distance estimate to Maffei 1 of.
• The surface brightness fluctuations distance measurement technique estimates distances to spiral galaxies based on the graininess of the appearance of their bulges.
• Since the discovery outburst, AE And has mostly been in the quiescent, or hot, LBV phase, with small irregular brightness fluctuations.
• Magnetic systems often show strong and variable polars; these often exhibit small-amplitude brightness fluctuations at what is presumed to be the period of rotation of the white dwarf.
• The prototype of these sorts of variable stars is Delta Scuti, which exhibits brightness fluctuations from + 4.60 to + 4.79 in apparent magnitude with a period of 4.65 hours.
• In 2003, using the infrared surface brightness fluctuations ( I-SBF ) and adjusting for the new period-luminosity value and a metallicity correction of  " 0.2 mag dex  " 1 in ( O / H ), an estimate of was derived.
• From the ground this was only possible for stars close to the Sun such as ? Centauri, Procyon, ? Virginis . . . The goal is to detect extremely small light variations ( down to 1 ppm ) and to extract the frequencies responsible for these brightness fluctuations.