发布求助
文献互助 智能选刊 最新文献

Communications of the Byurakan Astrophysical Observatory最新文献

筛选
英文 中文
The influence of environmental effects on Type Ia Supernovae Standardization 环境效应对 Ia 型超新星标准化的影响
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-316
A. Y. Baluta, M. Pruzhinskaya, P. Rosnet, N. Pauna
{"title":"The influence of environmental effects on Type Ia Supernovae Standardization","authors":"A. Y. Baluta, M. Pruzhinskaya, P. Rosnet, N. Pauna","doi":"10.52526/25792776-23.70.2-316","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-316","url":null,"abstract":"Type Ia Supernovae (SNe Ia) are used as reliable cosmic distance indicators and their standardization is necessary for a more accurate measurement of the cosmological parameters of the Universe using the Hubble diagram. However, the Hubble diagram still shows intrinsic dispersion, potentially influenced by the supernova’s environment. In this study, we reproduce Hubble fit diagrams for the Pantheon supernovae data, and also investigate the possibility of introducing various standardization equations for supernovae that exploded in early- and late-type galaxies. We analyze 330 SNe Ia from the Pantheon cosmological sample to study how host galaxy morphology affects SN Ia standardization. We find that SNe Ia hosted by early-type galaxies have different standardization parameters compared to those hosted by late-type galaxies. We conclude that correcting for host galaxy morphology significantly impacts the accuracy of the Hubble diagram fit.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"44 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139442472","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
Building the Largest Sample of IR Galaxies. Preliminary Results 建立最大的红外星系样本。初步结果
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-321
G. Mikayelyan, A. Mickaelian, H. Abrahamyan, G. Paronyan
{"title":"Building the Largest Sample of IR Galaxies. Preliminary Results","authors":"G. Mikayelyan, A. Mickaelian, H. Abrahamyan, G. Paronyan","doi":"10.52526/25792776-23.70.2-321","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-321","url":null,"abstract":"To build the IRAS full extragalactic sample (including both point-like sources - QSOs, and extended ones - galaxies), we have applied several approaches. Cross-correlation of IRAS PSC/FSC Combined Catalogue with optical catalogues of already known galaxies, quasars and blazars such as The NGC 2000.0 Catalog, Third Reference Catalogue of Bright Galaxies, The Roma BZCAT, Astrometric Catalogue 5 and many others. Cross-correlation of IRAS PSC/FSC Combined Catalogue with optical catalogues giving data, which can be used to determine galaxy candidates, for example Sloan Digital Sky Survey (SDSS, contains data about point like and extended objects), The APM North Catalogue (contains data about ellipticity of objects), etc. Cross-correlation of IRAS PSC/FSC Combined Catalogue with GAIA DR3, which gives data about proper motions of objects (we can consider the objects having real proper motions as stars and exclude them from the sample). If all data show the same type of object, then we give it as a genuine one, and if there is an ambiguity, we give the most probable type with a flag. All this will lead to construction of a confident sample of optical counterparts of extragalactic objects of IRAS PSC/FSC: galaxies and quasars. We also will study IR/opt flux ratios, which may serve as one more characteristic to reveal galaxies with very high SFR. We will carry out calculation of IR luminosities for all IR galaxies. We expect revelation of many new ULIRGs and HLIRGs and building their largest samples.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"118 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139444615","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
Inertia I: The global MSp-SUSY induced uniform motion 惯性 I：全局 MSp-SUSY 诱导的匀速运动
Communications of the Byurakan Astrophysical Observatory Pub Date : 2024-01-09 DOI: 10.52526/25792776-23.70.2-170
G. Ter-Kazarian
{"title":"Inertia I: The global MSp-SUSY induced uniform motion","authors":"G. Ter-Kazarian","doi":"10.52526/25792776-23.70.2-170","DOIUrl":"https://doi.org/10.52526/25792776-23.70.2-170","url":null,"abstract":"In this communication our main emphasis is on the review of the foundations of standard Lorentz code\u0000(SLC) of a particle motion. To this aim, we develop the theory of global, so-called, `double space´- or\u0000master space (MSp)-supersymmetry, subject to certain rules, wherein the superspace is a 14D-extension\u0000of a direct sum of background spaces M4⊕ MSp by the inclusion of additional 8D fermionic coordinates.\u0000The latter is induced by the spinors θ and ¯θ referred to MSp. While all the particles are living on\u0000M4, their superpartners can be viewed as living on MSp. This is a main ground for introducing MSp,\u0000which is unmanifested individual companion to the particle of interest. Supersymmetry transformation is\u0000defined as a translation in superspace, specified by the group element with corresponding anticommuting\u0000parameters. The multiplication of two successive transformations induce the motion. As a corollary, we\u0000derive SLC in a new perspective of global double MSp-SUSY transformations in terms of Lorentz spinors\u0000(θ,\u0000¯θ). This calls for a complete reconsideration of our ideas of Lorentz motion code, to be now referred\u0000to as the individual code of a particle, defined as its intrinsic property. In MSp-SUSY theory, obviously as\u0000in standard unbroken SUSY theory, the vacuum zero point energy problem, standing before any quantum\u0000field theory in M4, is solved. The particles in M4 themselves can be considered as excited states above the\u0000underlying quantum vacuum of background double spaces M4⊕ MSp, where the zero point cancellation\u0000occurs at ground-state energy, provided that the natural frequencies are set equal (q\u00002\u00000 ≡ νb = νf ), because\u0000the fermion field has a negative zero point energy while the boson field has a positive zero point energy.\u0000On these premises, we derive the two postulates on which the Special Relativity (SR) is based.","PeriodicalId":412578,"journal":{"name":"Communications of the Byurakan Astrophysical Observatory","volume":"27 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139441709","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
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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信