The modern generation of electronic detectors, such as the CCD, have made improved photometry possible, especially at magnitudes near photographic plate limits and at wavelengths extending to the near infrared. Vigorous efforts should now be made to extend measurements to longer wavelengths since VandenBerg and Bell (1985) have recently calculated BVRI synthetic isochrones. Consequently, we have embarked on a program of CCD BVRI photometry for determining the ages of globular clusters.
From BVRI CCD frames obtained with the 1.54 Danish telescope at ESO-La Silla we have at this moment completed the reductions of the following 5 globular clusters: NGC 104 (47 Tuc), NGC 2298, NGC 5139 ( 0) Cen), NGC 6121 (M4), and NGC 6362. For these clusters, we have derived ages all close to 17x10^0y. Providing strong evidence that the globular cluster system is coeval, and that the epoch of the galactic contraction was short.
Jaké jsou pracovní podmínky vědců a vědkyň na českých vysokých školách a výzkumných institucích? S čím jsou čeští vědci a vědkyně nejvíce nespokojeni? Co jim brání v kariérním růstu? Jak se dělá věda ve chvíli, kdy se stanete rodičem?, Nina Fárová, Kateřina Cidlinská, Marcela Linková, Hana Maříková, Hana Tenglerová., and Obsahuje bibliografické odkazy
The conference organized under the auspices of the Minister of Foreign Affairs of the Czech Republic Lubomír Zaorálek, was held on the 13-14th April 2016. It aimed at addresing the issues of overcoming global threats, developing inter-cultural and intra-cultural dialogue, including inter-religious and intra-religious respect and discussions, enhancing justice, mutual cooperation and stability. The conference was attended by Czech and foreign experts in social sciences and humanities, ambassadors of EU countries and Muslim states as well journalists. The theme of global threats requires an analysis and ideas for finding solutions to various cultural, social, political, religious, military and other conflicts. and Marina Hužvárová.