排序方式: 共有23条查询结果,搜索用时 328 毫秒
11.
Spectroscopic data are presented for 35 galaxies from selected fields of the Second Byurakan Survey (SBS). The observations were made on the 2.6 m telescope at the BAO using the SCORPIO spectral camera. A majority of the objects were observed for the purpose of improving the classification of types in accordance with an adapted scheme presented in this paper. 相似文献
12.
Spectral and morphological studies of an infrared nebula in the neighborhood of Cyg OB7 discovered in 2007 are reported. It
is shown that over the last several years the brightness and shape of the nebula have changed significantly. Spectral observations
of the nebula made with the 2.6-m telescope at the Byurakan Observatory in 2004 and 2005 reveal the existence of a faint trace
of continuum spectrum, indicating the existence of a star inside the dark cloud. Classification of these spectra shows that
over one year the star’s spectral class changed from late G to early K. It is also shown that the absorption in the direction
of the nebula is as high as 8m–10m.
__________
Translated from Astrofizika, Vol. 50, No. 1, pp. 17–27 (February 2007). 相似文献
13.
S. K. Balayan 《Astrophysics》1997,40(2):101-113
Results are given on a spectral classification of 316 stars and objects having a continuous spectrum, selected in the course of the Second Byurakan Spectral Sky Survey. Slit spectra are used, obtained from 1978 to 1994, predominantly on the 6-m telescope of the Special Astrophysical Observatory, Russian Academy of Sciences, with a resolution of 5–15 Å. The sample contains objects in the range of stellar magnitudes 10.12 ≤ m(pg) ≤ 19.5. We found 114 DA, 13 DB, 4 DC, and 1 DQ white dwarfs, 57 sdB and 13 sdO subdwarfs, 12 NHB, 10 cataclysmic variables, 76 stars of late spectral types, 3 spectroscopic binary systems, and 13 objects with a continuous spectrum. Several recordings are given for each of these spectral types. 相似文献
14.
S. K. Balayan 《Astrophysics》1997,40(4):413-415
A brief analysis of a sample of stars from the Second Byurakan Spectroscopic Survey is given. It contains 626 objects in the
range of apparent magnitudes 10.1 ≤ m(pg) ≤ 19.5 and consists mainly of white dwarfs and subdwarfs of early spectral types.
Most of the objects have been classified for the first time. Their distributions with respect to stellar magnitude and spectral
type are given.
Translated from Astrofizika, Vol. 40, No. 4, pp. 627–631, October-December, 1997. 相似文献
15.
Data are presented on the toxicity of hydroquinone and pyrocatechol in the presence of protein preparations possessing oxidase activity. Problems are discussed of their use as biologically active means. 相似文献
16.
A preliminary analysis is given of 2D spectroscopic data on the galaxy SBS 1533+574(AB) obtained using the multipupil spectrographs
on the 2.6-m telescope at the BAO (VAGR) and the 6-m telescope at the SAO (MPFS). The two components of the galaxy are star
formation regions in different stages. The component SBS 1533+574B is known to be a BCDG. The plots of the intensity distribution
of the radiation in the recombination lines of hydrogen and the forbidden lines of gases with a low degree of ionization obtained
here make it possible to compare the basic characteristics of the HII-zones and the surrounding shell. The velocity distribution
over the field of the galaxy is indicative of a common rotation of the system and of an intrinsic rotation of the components
which is more distinct for component B.
__________
Translated from Astrofizika, Vol. 49, No. 4, pp. 511–525 (November 2006). 相似文献
17.
Results from a study of objects with continuum spectra sampled by the Second Byurakan Sky Survey are presented. Spectra of the brightest objects were obtained with the 2.6 m telescope at the Byurakan Observatory. Cross correlations are made with catalogs of infrared, radio, and x-ray sources. 相似文献
18.
A method is introduced for constructing two-color maps for the in-plane component of the magnetic field of our galaxy in (R,
l) and (DM, l) coordinates. It is shown that, in agreement with the standard models of the galactic magnetic field, the magnetic
field in neighboring spiral arms reverses direction. However, the magnetic field in the spiral arm of Sagittarius differs
significantly from the standard magnetic field model, with the major difference being that the magnetic fields in the southern
and northern hemispheres are oppositely directed in the spiral arm of Sagittarius. It is proposed that this distribution of
the magnetic field can be explained best by assuming that the spiral arm of Sagittarius, or, at least, a magnetic spiral arm
in that region, is not symmetric with respect to the galactic plane and lies mainly in the northern hemisphere. 相似文献
19.
The results of spectroscopic observations of 28 galaxies of the Second Byurakan Sky Survey, completing the follow-up spectroscopy of galaxies in the survey field with central coordinates = 12h22m, = +35°, are presented. The spectra were obtained on the 2.6 m telescope of the Byurakan Astrophysical Observatory, National Academy of Sciences of the Republic of Armenia, and the 6 m telescope of the Special Astrophysical Observatory, Russian Academy of Sciences. The redshifts and absolute stellar magnitudes of all the galaxies have been determined. A preliminary analysis of the spatial distribution of all galaxies in this sample is given. 相似文献
20.
The results of spectroscopic observations of 30 galaxies from the Second Byurakan Spectral Sky Survey in a field of 16 square degrees centered at coordinates a = 15h30m, δ = + 53°are presented. The spectra were obtained on the 6-m telescope of the Special Astrophysical Observatory, Russian Academy of Sciences, in the wavelength range of 4000–7400 Å with 15 Å resolution. Emission lines are present in the spectra of most of the galaxies. Redshifts and absolute stellar magnitudes were determined for all the galaxies. 相似文献