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DETERMINATION OF THE GALACTOCENTRIC DISTANCE OF THE SUN ON THE BASIS OF SPACE DISTRIBUTION OF GLOBULAR-CLUSTERS BY THE MAXIMUM-LIKELIHOOD METHODстатья
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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
- Авторы: RASTORGUEV A.S., PAVLOVSKAYA E.D., DURLEVICH O.V., FILIPPOVA A.A.
- Журнал: Astronomy Letters
- Том: 20
- Номер: 5
- Год издания: 1994
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 591
- Последняя страница: 595
- Аннотация: The maximum likelihood method is used to obtain the observed space distribution of galactic globular clusters. Three models of space density that take into account the selection effects (depending on 3, 4, and 5 parameters, including R0, the Galactocentric distance of the Sun) are considered. The common feature of these models is the power law on galactocentric and heliocentric distances. Distance scales of globular clusters from Kukarkin (1974) and Webbink (1985) are used. The first is based on the dependence of [M(v)RR] on metallicity, and the second assumes [M(V)RR] = + 0.m6. Averaging over various calculation sets, i.e., models of space distribution, and distance scales yields R0 = (7 +/- 0.5) kpc. This value lies near the lower boundary of the range of all available estimates of R0. The space distribution of globular clusters can be approximated well by the power law R(-alpha) (alpha = 2.5 - 2.7) at a distance of up to 20 - 25 kpc from the galactic center.
- Добавил в систему: Дурлевич Ольга Васильевна