DISTRIBUTION OF CARBON STARS IN THE GALAXY

Автор(и)

  • I. Eglitis Institute of Astronomy of the University of Latvia, Latvia
  • A. Sokolova Institute of Astronomy of the University of Latvia, Latvia

DOI:

https://doi.org/10.18524/1810-4215.2018.31.144459

Ключові слова:

circumstellar mater, near infrared, carbon stars, absolute magnitude, distance

Анотація

A search for new faint carbon (C) stars in the Polar region δ > 55o has been accomplished by obtaining objective prism spectra in the near infrared 550 -- 900 nm on images of CCD camera of Baldone Schmidt telescope of Astrophysical observatory. The positions of stars   having color indices (J – K) > 1.3 mag in Two Micron All Sky Infrared Survey (2MASS) were selected to pick out suspicious carbon stars.

Our survey is limited in brightness by J < 10 mag. 24 new carbon stars were found and their characteristics obtained. The correlative relation between Teff  and spectral gradient [757 – 685] was confirmed. Such characteristics as Teff, distance from the Sun, absolute Mk  were obtained for newly discovered carbon stars.

Посилання

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Опубліковано

2018-10-15

Номер

Розділ

Астрофізика (зоряні атмосфери, взаємодіючі подвійні системи, змінні зорі)