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Communications of the Byurakan Astrophysical Observatory最新文献

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Astronomical Surveys and Active Galaxies 天文巡天和活动星系
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-261
A. Mickaelian, H. Abrahamyan, G. Paronyan, G. Mikayelyan, R. Andreasyan, A. G. Sukiasyan, L. Hambardzumyan, V. K. Mkrtchyan, A. A. Gasparyan
{"title":"Astronomical Surveys and Active Galaxies","authors":"A. Mickaelian, H. Abrahamyan, G. Paronyan, G. Mikayelyan, R. Andreasyan, A. G. Sukiasyan, L. Hambardzumyan, V. K. Mkrtchyan, A. A. Gasparyan","doi":"10.52526/25792776-23.70.2-261","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-261","url":null,"abstract":"Astronomical Surveys are the main source for discoveries in astronomy. We are giving the most important parameters the significance of the surveys, their main products: images, photometric, spectroscopic and other data. Among the surveys, namely extragalactic ones, most important are those for Active Galaxies (both Active Galactic Nuclei (AGN) and Starburst (SB) Galaxies), and particularly the AGN. These objects reveal many spatial and physical characteristics helping understanding the Universe. We give a brief review of our searches and studies for Active Galaxies.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"9 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139441739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Terrestrial complex for receiving information from small spacecrafts 接收小型航天器信息的地面综合设施
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-302
S. B. Makarov, S. Zavjalov, S. V. Volvenko, I. Lavrenyuk, M. Y. Vinnichenko, A. Aharonyan, V. Avetisyan
{"title":"Terrestrial complex for receiving information from small spacecrafts","authors":"S. B. Makarov, S. Zavjalov, S. V. Volvenko, I. Lavrenyuk, M. Y. Vinnichenko, A. Aharonyan, V. Avetisyan","doi":"10.52526/25792776-23.70.2-302","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-302","url":null,"abstract":"The work is devoted to the development of a terrestrial complex for receive and process information from small spacescrafts. The main requirement for these stations is their simplicity and maximum availability both in terms of cost and operating capabilities. Such stations provide a two-way exchange of information with spacecrafts in the frequency range 435-438 MHz, receive and process data transmitted in the VHF band by amateur and student satellites, and receive communications from the international space station crew and radio amateurs on Earth.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"13 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New M-type stars found in the BAO Plate Archive centered at α = +15h δ = +580 以 α = +15h δ = +580 为中心的 BAO 板块档案中发现的新 M 型恒星
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-355
G. Kostandyan, K. Gigoyan
{"title":"New M-type stars found in the BAO Plate Archive centered at α = +15h δ = +580","authors":"G. Kostandyan, K. Gigoyan","doi":"10.52526/25792776-23.70.2-355","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-355","url":null,"abstract":"The BAO Plate Archive low-resolution spectral plate centered at α = +15h δ = +580 is analyzed to find new late-type stars. 23 new late-type stars have been detected. New objects were cross-correlated with GAIA DR3, 2MASS, AllWISE, TESS and SDSS catalogues. For the detected objects, we present luminosity classes estimated from Gaia DR3 and 2MASS photometry and available proper motions. The majority of the objects are M dwarfs. Two objects are M giants.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"23 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Discovery of new red stars with digitized plates of the μ Cephei range 用 μ Cephei 系列的数字化平板发现新红星
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-353
E. Karapetyan, K. Gigoyan, G. Kostandyan
{"title":"Discovery of new red stars with digitized plates of the μ Cephei range","authors":"E. Karapetyan, K. Gigoyan, G. Kostandyan","doi":"10.52526/25792776-23.70.2-353","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-353","url":null,"abstract":"The results of the spectral classification of 357 red stars observed in the Cepheus region are presented. 257 of the featured stars are included in the KP2001 catalogue. We found the remaining 100 red stars as a result of digitizing plates used in compiling the KP2001 catalog. All star data is taken from the GAIA DR3 database. These stars are most likely giants and supergiants. None of them were included in the catalog of variable stars. It has been suggested that further research may reveal variability in many of these.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The concept of the massive photon and its astrophysical implications 大质量光子的概念及其天体物理学意义
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-348
G. A. Saiyan
{"title":"The concept of the massive photon and its astrophysical implications","authors":"G. A. Saiyan","doi":"10.52526/25792776-23.70.2-348","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-348","url":null,"abstract":"We discuss the concept of the massive photon with its possible implications in astrophysics. We use the term ”mass equivalent” instead of relativistic or effective mass. We also analyzed modified Planck’s law and estimated (mean mass/rest mass) ratio in connection to the temperature of blackbody radiation of the massive photons. This ratio diverges at high temperatures and approaches unity at low temperatures. The ”mass equivalent” for the CMB radiation was estimated to be equal to 0.0468% of the total mass of the Universe. We have discussed importance of the Breit-Wheeler process of particle – antiparticle production in the early Universe. We have evaluated the upper limit of the rest mass of the photon using gravitational and cosmological redshifts. A correlation was found between estimated masses of the photon and the lowest/highest frequencies of the spectral bands used for estimation of the mass.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"16 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Activity phenomena in the baryonic universe as a result of interaction between baryonic objects and the carrier of dark energy 重子宇宙中的活动现象是重子物体与暗能量载体相互作用的结果
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-287
H. Harutyunian
{"title":"Activity phenomena in the baryonic universe as a result of interaction between baryonic objects and the carrier of dark energy","authors":"H. Harutyunian","doi":"10.52526/25792776-23.70.2-287","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-287","url":null,"abstract":"Non-stable phenomena are under consideration for rather long time. Mostly two issues seem to be very essential in connection with non-stability, namely, their role in the evolution of cosmic objects and the sources providing energy for non-stability manifestations. We argue here that the energy exchange with the dark energy carrier may be the main mechanism of energy providing. Backed by the contemporary ideas about the dark energy, we accept that this new-found energy homogeneously fills all space at all scales and interacts with cosmic objects belonging to all hierarchical levels. We argue that baryons mass is changeable quantity depending on the environmental physical conditions and therefore it is a subject of evolution as the objects of other hierarchical classes. Moreover, we argue in favour of new paradigm to be used for the further development of cosmology and cosmogony, which is not based on the a priory hypothesis by Kant and Laplace.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"51 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139441912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification of birth places of high-velocity stars: CepOB2 association 识别高速恒星的诞生地：CepOB2 协会
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-310
S. Ghazaryan, L. Hambardzumyan, A. Grigoryan, K. Gigoyan, K.-U. Michel, V. Hambaryan, R. Neuhaeuser
{"title":"Identification of birth places of high-velocity stars: CepOB2 association","authors":"S. Ghazaryan, L. Hambardzumyan, A. Grigoryan, K. Gigoyan, K.-U. Michel, V. Hambaryan, R. Neuhaeuser","doi":"10.52526/25792776-23.70.2-310","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-310","url":null,"abstract":"We have searched high-velocity stars (runaway, walk-away, pulsars, HMXBs and LMXBs), which could have, most probably, originated in the complex CepOB2 association, i.e. in the cores (small clusters or multiple stellar systems) of it. With the trace-back motion study of them we found at least two pairs consisting of a runaway star and pulsar, which were within stellar groups in the Cep OB2 association ∼ 1.5-5.5 Myr ago.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"14 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the short wavelength range of QSOs QSO 短波长范围分析
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-361
A. G. Sukiasyan, A. Mickaelian, H. Abrahamyan, G. Paronyan, G. Mikayelyan
{"title":"Analysis of the short wavelength range of QSOs","authors":"A. G. Sukiasyan, A. Mickaelian, H. Abrahamyan, G. Paronyan, G. Mikayelyan","doi":"10.52526/25792776-23.70.2-361","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-361","url":null,"abstract":"In this work we try to classify objects using the MgII 2798 Å line from optical spectra. For that, we use BZQ type objects from BZCAT catalogue. From SDSS catalogues we have 618 BZQ objects which have optical spectra and only in 139 objects there are MgII and Hβ lines simultaneously (z=0.3345-1.0915). By the shape of MgII lines, we grouped these spectra into 3 categories: Broad & Narrow, Broad+Narrow, and Broad.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"114 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139444414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Classification of Blazars by Activity Types 耀变体的活动类型分类
Communications of the Byurakan Astrophysical Observatory Pub Date : 2023-07-07 DOI: 10.52526/25792776-23.70.1-83
H. Abrahamyan, A. Mickaelian, G. Mikayelyan, G. Paronyan, A. G. Sukiasyan, V. K. Mkrtchyan, L. A. L. A. Hambardzumyan
{"title":"Classification of Blazars by Activity Types","authors":"H. Abrahamyan, A. Mickaelian, G. Mikayelyan, G. Paronyan, A. G. Sukiasyan, V. K. Mkrtchyan, L. A. L. A. Hambardzumyan","doi":"10.52526/25792776-23.70.1-83","DOIUrl":"https://doi.org/10.52526/25792776-23.70.1-83","url":null,"abstract":"Blazars are the most energetic sources in the Universe. They unify two major types of objects: BL Lac objects and Flat Spectrum Radio Quasars (FSRQ). So far, 3561 blazars are known from BZCAT v.5 catalogue. However, in BZCAT v.5 all blazars are grouped into four main classes, where extended radio sources and some unknown objects are added: BZB (BL Lac objects), BZQ (FSR Quasars), BZG (Blazar-like (BZQ-like) Galaxies) and BZU (Blazars of Unknown subtypes). There is no information about optical classification of these sources. We have accomplished optical classification for BZU and BZG sources, which have optical spectra from SDSS catalogue. Most of these sources had no optical class before or have changed their optical classification after our work. For some blazars, we obtained optical classes for the first time. In the current work we have done an overall optical investigation for all classes of blazars (BZB, BZQ, BZG and BZU). After the optical classification, some BZU sources, which have SDSS spectra, have changed to QSO (BZQ) or Galaxies (BZG). This way we give a better understanding of objects included in BZCAT v.5.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114618259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Spectral Lines Evolution in the Presence of Time-Dependent Energy Sources 时变能量源存在下的光谱线演化
Communications of the Byurakan Astrophysical Observatory Pub Date : 2023-07-07 DOI: 10.52526/25792776-23.70.1-131
A. Nikoghossian
{"title":"The Spectral Lines Evolution in the Presence of Time-Dependent Energy Sources","authors":"A. Nikoghossian","doi":"10.52526/25792776-23.70.1-131","DOIUrl":"https://doi.org/10.52526/25792776-23.70.1-131","url":null,"abstract":"A brief review of the author’s recent work on the development and application of the theory of time-dependent transfer of radiation in the spectral line is given. Various factors that influence the temporal characteristics of changes in line spectra are studied. This creates a fundamental opportunity to use them to gain insight into both external energy sources, the physical and geometrical properties of the medium itself as well as the various optical parameters of the observed spectral lines.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121296457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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