GROUPINGS OF POPULATION I OBJECTS IN THE GALAXY

L. N. Berdnikov, Yu. N. Efremov, E. V. Glushkova, D. G. Turner

Анотація


The distribution of Cepheids in the Galaxy is studied using a new catalogue of Cepheid distances in conjunction with the method of hierarchical clustering. The resulting delineation of Cepheid complexes is compared with those for other Population I objects: open clusters and OB-associations. Parameters derived for complexes of Cepheids are very similar to those for open clusters and OB-associations: the typical dimension of first level groups is ∼0.2 kpc, while the size of complexes is ∼0.9 kpc. Mostly the complexes of different objects are spatially coincident, but not always.

Ключові слова


Stars; Cepheids; open clusters; OB-associations; stars; complexes.

Повний текст:

PDF (English)

Посилання


Avedisova V.S., 1989, Astrofisica, 30, 83.

Berdnikov L.N.: 1987a, Pis'ma Astron. Zh., 13, 110.

Berdnikov L.N.: 1987b, Peremennye Zvezdy, 22, 505.

Berdnikov L.N.: 2006, Odessa Astron. Publ, 16, ???.

Berdnikov L.N., Efremov Yu.N.: 1989, Astron. Zh.. 66, 537.

Efremov Yu. N.: 1983, Sov. Astron. Lett, 9, 51.

Efremov Yu.N.: 1989, Star formation sites in galaxies (in Russian). Moscow, 1989.

Efremov Yu.N.: 1995, Astron. J., 110, 2757.

Efremov Yu.N.: 1998, Astron. and Astrophys. Trans.. 15, 3.

Efremov Yu.N.: 2002, Astron. Rep., 46, 791.

Glushkova E.V. in: Melnik A.M., Efremov Yu.N.: 1995, Astron. Lett, 21, 10.




DOI: https://doi.org/10.18524/1810-4215.2005.18.98240

Посилання

  • Поки немає зовнішніх посилань.


Copyright (c) 2017 Odessa Astronomical Publications

Creative Commons License
Ця робота ліцензована Creative Commons Attribution-NonCommercial 4.0 International License.