YOUNG STELLAR NUCLEI IN LENTICULAR GALAXIES: NGC 5574 AND NGC 7457 1 O. K. Sil'chenko 2 Sternberg Astronomical Institute, Universitetsky Pr. ... The compact nuclei of the galaxies appear to be chemically distinct: in NGC 5574 the nucleus is distinguished by a higher than solar irontomagnesium ratio, and in NGC 7457 a drop of mean stellar met allicity by a factor of 2 exists between the nucleus and the bulge. ... The bulges in NGC 5574 and NGC 7457 have rather young stellar populations. ...
On properties of metallicity function of F-stars in the galactic disk . Yu.Shevelev & V.Marsakov . ... MF of different age disk stars . ... Age-metallicity relation . ... Based on the complete sample from ( Marsakov & Shevelev, 1995a ) we determined in ( Shevelev & Marsakov, 1995 ) the vertical metallicity gradients of disk population stars in several narrow age ranges from the observed metallicity values and the calculated maximum distances of their orbits from the galactic plane. ...
... The author attempts to approach the problem from the positions of systems analysis with account for the ideological grounds and history of space activities in Russia and abroad, comparing its current interpretation with the initial goals posed by leading theoreticians and practitioners who stood at the cradle of the space exploration era. ... The space systems recognized in Russia as priority projects are largely developed with violations of the systems approach principles. ...
STARTEST IMAGES GALLERY . STARTESTING TELESCOPES WITH AN AUTOCOLLIMATOR . ... This website is a joint effort of Markus Ludes from APM-Telescopes and Cor Berrevoets ( Aberrator free startesting Software ). The site aims at explaining the different aspects of star-testing telescopes. ... Markus Ludes (APM telescopes) used a high quality 10" Maksutov Newtonian (Zygo tested at 632,8 nm with the following errors: 1/10.1 wavefront p.t.v. and 1/51 wavefront RMS) as collimator in single pass scheme. ...
ELT MASS/DIMM instrument for atmospheric turbulence measurements. ... 1.2 Principal geometry of MASSDIMM device . ... The next chapter is a guide for alignment of the optical scheme elements the op eration which is mandatory after the device assembly or while installing the device on the telescop e. Exit pupil optics tuning (MASS segmentator and DIMM mirrors), fo cusing and lateral p ositioning of the Fabry lens, checking the entrance pupil p osition are the sub jects of particular attention. ...
[
Текст
]
Ссылки http://curl.sai.msu.ru/mass/download/doc/elt_description.pdf -- 874.8 Кб -- 11.09.2006 Похожие документы
... Astronomical Division of Physical Department Chairs Teachers Postgraduate Students Undergraduate Students - 28 человек в преподавательском составе (страницы не у всех), но есть страницы и студентов, итого - 13 страниц. ... Автор страницы . ... Department of Radioastronomy Local staff : 27 человек, персональных страниц - 15. ... Space Geodesy Department : 10 человек, персональных страниц - 3. ... Cosmic Ray Physics Department - 24 сотрудника, персональных страниц не найдено (28.01.1999) . ...