Further experimental evidence of the 13 day solar periodicity
Extensive solar data obtained over the period May to August 1982 are analyzed to show the continued existence, over a six-year period, of a 13-day velocity...
Further implications of solar p-modes as measured in NA and K resonance lines
The ratios between the amplitudes of p-modes measured simultaneously in the Na and K resonance lines are compared with the expected ratios for adiabatic waves...
g'r'i' and redshift of Abell 2254 galaxies (Girardi+, 2011)
Multi-object spectroscopic observations of A2254 were carried out at the TNG telescope in May and October 2009 and in March 2010. Our photometric observations...
g-mode: a new generation of helioseismic instrument
The GOLF team pushes a new concept of instrument devoted to the search of gravity modes and low order low frequency p modes in order to improve our knowledge of...
Gaia spectroscopy: processing, performances and scientific returns
During the five years of the mission, the Gaia spectrograph, the Radial Velocity Spectrometer (RVS) will repeatedly survey the celestial sphere down to...
Galactic archaeology for amateur astronomers: RR Lyrae stars as tracers of the Milky Way formation
Cosmological models predict that large galaxies like the Milky Way formed from the accretion of smaller stellar systems. The most spectacular of these merger...