A new procedure for the photometric parallax estimation
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Tarih
2003
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
We present a new procedure for photometric parallax estimation. The data for 1236 stars provide calibrations between the absolute magnitude offset from the Hyades main-sequence and the ultraviolet-excess for eight different (B-V)0 colour-index intervals, (0.3 0.4), (0.4 0.5), (0.5 0.6), (0.6 0.7), (0.7 0.8), (0.8 0.9), (0.9 1.0) and (1.0 1.1). The mean difference between the original and estimated absolute magnitudes and the corresponding standard deviation are rather small, +0.0002 and ±0.0613 mag. The procedure has been adapted to the Sloan photometry by means of colour equations and applied to a set of artificial stars with different metallicities. The comparison of the absolute magnitudes estimated by the new procedure and the canonical one indicates that a single colour-magnitude diagram does not supply reliable absolute magnitudes for stars with large range of metallicity. © Astronomical Society of Australia 2003.
Açıklama
Anahtar Kelimeler
Photometric parallax, Sloan photometry, UBV photometry
Kaynak
Publications of the Astronomical Society of Australia
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
20
Sayı
3
