منابع مشابه
SPICA and Its Instrumentation
SPICA (Space Infrared Telescope for Cosmology and Astrophysics) is an astronomical mission optimized for midand far-infrared astronomy with a cryogenically cooled 3.5 m telescope. Its high spatial resolution and unprecedented sensitivity in the midand far-infrared will enable us to address a number of key problems in present-day astronomy, ranging from the star-formation history of the universe...
متن کاملSPICA deep cosmological survey: from AKARI to SPICA
On the basis of the results of the AKARI far-infrared deep surveys, we propose a multi-wavelength far-infrared deep cosmological survey with SAFARI on SPICA. We have carried out a far-infrared deep cosmological survey with AKARI, and successfully obtained the galaxy counts and new limits on the absolute brightness of the cosmic far-infrared background. These results provide strong constraints o...
متن کاملMultiperiodic light variations of active stars
We studied the long-term light behaviour of ten rapidly-rotating active stars (LQ Hya, V833 Tau, EI Eri, V711 Tau, BY Dra, HU Vir, IL Hya, VY Ari, HK Lac, IM Peg) with Fourier analysis. Using photometric databases of up to 30 years in length, we search for periodic or quasi-periodic long-term variations of the overall light levels. Out of the ten stars studied, nine show cyclic variability and ...
متن کاملLight to Mass Variations with Environment
Large and well defined variations exist between the distribution of mass and the light of stars on extragalactic scales. Mass concentrations in the range 10 − 10M⊙ manifest the most light per unit mass. Group halos in this range are typically the hosts of spiral and irregular galaxies with ongoing star formation. On average M/LB ∼ 90M⊙/L⊙ in these groups . More massive halos have less light per...
متن کاملAutomatic Supervision Survey for Spica-rail Program
Also considered as not safety critical, modern railway traffic control system remains the ultimate solution to solve potentially dangerous scenarios (Belmonte 2006). Also, study the impact of Automatic Train Supervision (ATS) systems on railway safety is mandatory. The way of simulations analysis was chosen to perform necessary human operator’s behaviours evaluation. Real ATS system is installe...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1969
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/145.2.131