Spectra of galaxies with ultraviolet continuum. III

Markaryan, B. E.; Lipovetskii, V. A.; Stepanyan, Dzh A.

doi:10.1007/bf01005612

Cited by 6 publications

(9 citation statements)

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“…The high spatial densities of low--luminosity galaxies with ultraviolet continuum were noted in [16][17][18] [4][5][6][7][8][9], some of these last are quite indistinguishable from stars both in the low-dispersion spectra as well as direct photographs. Among them several objects are low-luminosity galaxies.…”

Section: Discussion Of the Resultsmentioning

confidence: 95%

“…Among the 83 objects considered, eight galaxies have been reliably classified as Seyferts, and a Seyfert nature can be suspected for three more of them [4][5][6][7]31 It is probable that such objects must be taken into account in the calculation of the bright end of the luminosity function~ In this case, completeness of the second survey may reach ~17m5. The proportion of Seyferts and quasistellar objects among galaxies with ultraviolet continuum also increases appreciably.…”

Section: Discussionmentioning

confidence: 99%

“…The method of observation, search, and selection are briefly described in [4,7]. [8,9]; for the remainder (9), they are given below.…”

Section: Observationsmentioning

confidence: 99%

“…The results of the investigations are given in [4][5][6], which contain data on 358 objects in 48 square degrees, 223 of these being galaxies. Of these, 75, i.e., one third, have an appreciable ultraviolet continuum in their spectra.…”

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confidence: 99%

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Luminosity function of faint galaxies with ultraviolet continuum

Stepanyan¹

1984

Astrophysics

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Section: Discussion Of the Resultsmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

“…The method of observation, search, and selection are briefly described in [4,7]. [8,9]; for the remainder (9), they are given below.…”

Section: Observationsmentioning

confidence: 99%

mentioning

confidence: 99%

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Luminosity function of faint galaxies with ultraviolet continuum

Stepanyan¹

1984

Astrophysics

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“…We have now commenced the Second Byurakan Spectral Sky Survey, which is being h o o made in selected areas in the region 8 -17 h in G and +49 to 61 in ~ [6]. The new survey makes it possible to identify different kinds of objects both on the basis of a significant ultraviolet continuum or the presence of emission lines in low-dispersion spectra.…”

Section: Introductionmentioning

confidence: 99%

Emission-line galaxies in the cluster A 634

Stepanyan¹

1984

Astrophysics

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Complex Investigation of SBS Galaxies in Seven Selected Fields

Hakopian¹

2013

Proc. IAU

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The main criterium for the selection of active objects in the First Byurakan Survey was the presence of uv-excess on low-dispersion spectra registered on photographic plates obtained with the 1m Shmidt type Byurakan telescope. Using the presence of emission lines as the second criterium became possible during the Second Byurakan Survey due to its improved technique. Through this criterium a majority of objects, extended by morphology, were selected into the separate "sample of galaxies". Certainly, there were cases of untrue selection, particularly, on faint magnitudes, when absorption lines were taken for emission ones and so on. Study of SBS galaxies, including evaluation of an effectivity of selection criteria, was undertaken by means of complex investigation of their very representative part, pooled in our basic sample. The completion of the follow-up slit spectroscopy of these about 500 objects formed the main stage of implementation of this program. Also, the scheme was developed to provide homogeneous classification, directed, in particular, to separate galaxies of AGN activity, of known types, and starforming, SfG, activity. For starforming galaxies, which constitute more than 80% of the basic sample, we provided two classes, SfGcontinual and SfGnebular. Averaged statistics of our SfG galaxies show, that every fifth of them is in more active, nebular phase of starforming activity, most of which are known as blue compact galaxies. However, it must be noted, that, by the analysis, namely for the latter objects, the effectiveness of the survey is the highest, so that BCGs represent the best product of SBS among extended objects. Aimed on further specifications in classification of SfG galaxies, other generalizations and statistics in frames of ongoing investigation, detailed studies of individual galaxies are currently beeing held, based on data of panoramic spectroscopy.Comment: 5 pages, 2 figures, 2 tables (extended version), prepared for the Conference Proceedings of IAU Symposium 304 "Multi-wavelength AGN Surveys and Studies" (Yeravan, Armenia, October 1-6, 2013

show abstract

Spectra of galaxies with ultraviolet continuum. III

Cited by 6 publications

References 1 publication

Luminosity function of faint galaxies with ultraviolet continuum

Luminosity function of faint galaxies with ultraviolet continuum

Emission-line galaxies in the cluster A 634

Complex Investigation of SBS Galaxies in Seven Selected Fields

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