SPECTROSCOPY OF B STARS IN THE VERY YOUNG OPEN STAR CLUSTER IC 1805
Аннотация и ключевые слова
Аннотация (русский):
Based on moderate-resolution spectra in the range 4200–5200 Å, we have studied late O and early B stars in the very young open star cluster IC 1805. The temperatures of the stars under the study have been derived by the differential method, in which simple parameters were chosen for a number of spectral lines and were then compared with the analogous parameters from an extensive sample of O–B stars. Accurate $T_{\rm eff}$ estimates have been obtained for them from model atmospheres. Applying this method for the sample of objects under the study has allowed the cluster age $t = 2 \pm 0.5$ Myr and distance modulus $(v$–$V)_{0} = 11.\!\!^{\rm m}5$ to be determined with confidence.

Ключевые слова:
stars: spectroscopic observations; open star clusters; age of cluster
Список литературы

1. Bressan P., Marigo A., Girardi L., et al., 2012, Monthly Notices of the Royal Astronomical Society, 427, 1, p. 127

2. Lyubimkov S., Lambert D., Rachkovskaya T., et al., 2000, Monthly Notices of the Royal Astronomical Society, 316, 1, p. 19

3. Lyubimkov S., Rachkovskaya T., Rostopchin S., et al., 2002, Monthly Notices of the Royal Astronomical Society, 333, 1, p. 9

4. Massey P., Johnson K., DeGioia-Eastwood K., 1995, Astophysical Journal, 454, 1, p. 151

5. Straižys V., Boyle R., Janusz R., et al., 2013, Astronomy & Astrophyscs, 554, 1, id. A3

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