| Autor: |
Shimanskii, V. V., Bikmaev, I. F., Borisov, N. N., Vlasyuk, V. V., Galeev, A. I., Sakhibullin, N. A., Spiridonova, O. I. |
| Předmět: |
|
| Zdroj: |
Astronomy Reports; Sep2008, Vol. 52 Issue 9, p729-735, 7p, 3 Charts, 3 Graphs |
| Abstrakt: |
We present results of photometric and spectroscopic observations of four close binaries with subdwarf B components: PG 0918+029, PG 1000+408, PG 1116+301, PG 0001+275. We discovered that PG 1000+408 is a close binary, with the most probable orbital period being P orb = 1.041145 day. Based on a comparison of the observed light curves at selected orbital phases and theoretical predictions for their variations, all the systems are classified as doubly degenerate binaries with low-luminosity white-dwarf secondaries. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
