Аннотация и ключевые слова
Аннотация (русский):
The determination of star cluster masses is crucial for the study of cluster dynamics, the evaluation of gravitational binding, and the assessment of star formation efficiency. Traditional photometric approaches face challenges such as incompleteness, the problem of evaluating the uncertainty in the mass-luminosity relation, contamination by binaries, and so on. Dynamic (virial) approaches, which provide an estimate of the total cluster mass, have a difficulty in estimating the velocity dispersion. This study proposes a method to calculate the dynamic masses by using proper motions, taking into account for their observational errors. Using modern data for open clusters and samples of their probable members, we estimate dynamic masses of 833 open clusters. The resulting dynamic mass distribution is nearly log-normal with the mode of $2400\,M_\odot$.

Ключевые слова:
open clusters and associations: general; stars: kinematics and dynamics; methods: statistical
Список литературы

1. Borodina O., Carraro G., Seleznev A., and Danilov V., 2021, Astrophysical Journal, 908, p. 60

2. Chandrasekhar S., 1942, Principles of stellar dynamics , The University of Chicago press

3. D'Agostino R., 1971, Biometrika, 58, p. 341

4. Danilov V. and Loktin A., 2015, Astrophysical Bulletin, 70, p. 414

5. Dias W., Monteiro H., Moitinho A., et al. , 2021, Monthly Notices of the Royal Astronomical Society, 504, p. 356

6. Eker Z., Soydugan F., Soydugan E., et al. , 2015, Astronomical Journal, 149, p. 131

7. Gaia Collaboration , Vallenari A., Brown A., et al. , 2023, Astronomy \& Astrophysics, 674, id. A1

8. Hunt E. and Reffert S., 2023, Astronomy \& Astrophysics, 673, id. A114

9. Hunt E. and Reffert S., 2024, Astronomy \& Astrophysics, 686, id. A42

10. King I., 1962, Astronomical Journal, 67, p. 471

11. Kulesh M., Samirkhanova A., Carraro G., et al. , 2024, Astronomical Journal, 167, p. 212

12. Kutuzov S. and Osipkov L., 1980, Soviet Astronomy, 24, p. 17

13. Seleznev A., 2016, Monthly Notices of the Royal Astronomical Society, 456, p. 3757

14. Seleznev A., Carraro G., Capuzzo-Dolcetta , R., et al. , 2017, Monthly Notices of the Royal Astronomical Society, 467, p. 2517

15. Taylor M., 2005, ASP Conf. Ser., 347, p. 29

Войти или Создать
* Забыли пароль?