منابع مشابه
Understanding A-type supergiants II. Atmospheric parameters and rotational velocities of Galactic A-type supergiants
We present the second paper of a series whose aim is to perform a global study of Galactic A-supergiants. Very little work has been carried out to determine the stellar parameters of these stars. This is illustrated with a brief review of some previous works. In this paper we analyze the determination of absolute magnitudes, spectral types and atmospheric parameters using the most recent Kurucz...
متن کاملthe investigation of the relationship between type a and type b personalities and quality of translation
چکیده ندارد.
Quantitative Spectral Analysis of Early B-type Supergiants in the Sculptor Galaxy Ngc 300
The spectra of two early B-type supergiant stars in the Sculptor spiral galaxy NGC 300 are analysed by means of non-LTE line blanketed unified model atmospheres, aimed at determining their chemical composition and the fundamental stellar and wind parameters. For the first time a detailed chemical abundance pattern (He, C, N, O, Mg and Si) is obtained for a B-type supergiant beyond the Local Gro...
متن کاملA High Spectral Resolution Atlas of Comet 122P/de Vico
On 3 and 4 October, 1995, we obtained high spectral resolving power (R= λ/∆λ = 60, 000) observations of comet 122P/de Vico using the 2DCoude cross-dispersed echelle spectrograph on the 2.7-m telescope of McDonald Observatory. The spectra cover the wavelength range from 3830Å– 10192Å. The spectra from 3830–5776Å are continuous; from 5777–10192Å there are increasing interorder gaps. The comet was...
متن کاملA high resolution spectral atlas of brown dwarfs
We present a UVES/VLT high resolution atlas of three L dwarfs and one T dwarf system, spectral classes at which most of the objects are brown dwarfs. Our atlas covers the optical region from Hα up to the near infrared at 1 μm. We present spectral details of ultra-cool atmospheres at very high resolution (R ∼ 33 000) and compare the spectra to model calculations. Our comparison shows that molecu...
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ژورنال
عنوان ژورنال: Astrophysical Bulletin
سال: 2015
ISSN: 1990-3413,1990-3421
DOI: 10.1134/s1990341315010113