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Distance scale for high-luminosity stars in OB associations and in field with Gaia DR2. Spurious systematic motionsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 сентября 2020 г.
- Авторы: Melnik A.M., Dambis A.K.
- Журнал: Astrophysics and Space Science
- Том: 365
- Номер: 7
- Год издания: 2020
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Номер статьи: 112
- DOI: 10.1007/s10509-020-03827-0
- Аннотация: We calculated the median parallaxes for 47 OB associations including at least 10 stars with known Gaia DR2 parallaxes. A comparison between trigonometric and photometric parallaxes of OB associations reveals a zero point offset of Delta_omega =−0.11±0.04 mas indicating that Gaia DR2 parallaxes are, on average, underestimated and the distances derived from them are overestimated. The correction of Delta_omega = −0.11 mas is consistent with the estimate that Arenou et al. (2018) obtained for bright stars. An analysisof parallaxes of OB associations and high-luminosity field stars confirms our previous conclusion (Dambis et al. 2001) that the distance scale for OB stars established by Blaha and Humphreys (1989) must be reduced by 10–20%. Spurious systematic motions of 10–20 km/s at the distances of 2–3 kpc from the Sun are found to arise from the use of the uncorrected Gaia DR2 parallaxes.
- Добавил в систему: Дамбис Андрей Карлович