Sentences with phrase «photometric measurements»
Though, the later photometric measurements by MASTER - Amur and spectral measurements by the 6 - metre BTA - 6 telescope showed that the star did not turn red, as, for example, the Sun does before sunset (this happens because it takes longer for the sun rays to pierce the atmosphere).
https://www.sciencedaily.com/ Not exact matches
On the whole, recent VLBI parallax measurements have shown that photometric distance estimates, when available, tend to be considerably more accurate than kinematic estimates.
We present new mass measurements of three of the planets in the Kepler - 20 system facilitated by 104 radial velocity measurements from the HARPS - N spectrograph and 30 archival Keck / HIRES observations, as well as an updated photometric analysis of the Kepler data and an asteroseismic analysis of the host star (MStar = 0.948 + -0.051 Msun and Rstar = 0.964 + -0.018 Rsun).
Weak lensing cosmology will be challenging: in addition to highly accurate galaxy shape measurements, statistically robust and accurate photometric redshift (photo - z) estimates for billions of faint galaxies will... ▽ More A key goal of the Stage IV dark energy experiments Euclid, LSST and WFIRST is to measure the growth of structure with cosmic time from weak lensing analysis over large regions of the sky.
No hints for the presence of an additional planetary companion in the two systems were found either from the photometric or radial velocity measurements.
By re-observing the photometric transit, we attempt to determine the transit parameters to high precision, and, by spectroscopic observations, to estimate the properties of the host star and determine the mass of the transiting object by means of radial - velocity measurements.
Transiting extrasolar planets are now discovered jointly by photometric surveys and by radial velocimetry, allowing measurements of their radius and mass.