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Development of High-Resolution Spectroscopy on the Moving Part of the 6-m Telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences 俄罗斯科学院特殊天体物理天文台6米望远镜运动部分高分辨率光谱学研究
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S199034132560005X
V. E. Panchuk, V. G. Klochkova, M. V. Yushkin, G. S. Zhuklevich
{"title":"Development of High-Resolution Spectroscopy on the Moving Part of the 6-m Telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences","authors":"V. E. Panchuk,&nbsp;V. G. Klochkova,&nbsp;M. V. Yushkin,&nbsp;G. S. Zhuklevich","doi":"10.1134/S199034132560005X","DOIUrl":"10.1134/S199034132560005X","url":null,"abstract":"<p>The review describes the evolution of high-resolution spectroscopic equipment mounted on the moving part of the alt-azimuth mount of the 6-m BTA telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. We list the main problems identified during operation of various detector types and execution of various observational programs. Restrictions on programs are identified that arise from various requirements for the positional stability of spectrographs. Prospects for reconstruction projects for Nasmyth focus instruments are assessed.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"162 - 170"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of Nine Symbiotic Star Candidates. Discovery of the Symbiotic Nature of V520 And 九颗共生候选恒星的研究。V520和的共生性质的发现
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341324600662
N. A. Maslennikova, A. M. Tatarnikov, A. A. Tatarnikova, A. V. Dodin, N. I. Shatsky
{"title":"Study of Nine Symbiotic Star Candidates. Discovery of the Symbiotic Nature of V520 And","authors":"N. A. Maslennikova,&nbsp;A. M. Tatarnikov,&nbsp;A. A. Tatarnikova,&nbsp;A. V. Dodin,&nbsp;N. I. Shatsky","doi":"10.1134/S1990341324600662","DOIUrl":"10.1134/S1990341324600662","url":null,"abstract":"<p>We present the results of spectroscopic observations of nine symbiotic star candidates in the 360–735 nm wavelength range carried out with the TDS spectrograph of the 2.5-m SAI MSU CMO telescope. Eight selected sample stars were classified as red giants of the M3–M6 spectral types. Light curve analysis revealed that all nine stars can be attributed to SRA- and SRB-type variables (based on the classification of the General Catalog of Variable Stars–GCVS). It is shown that one of the stars, V520 And, can be classified as a symbiotic star. Its spectrum reveals H I, He I, Fe II emission lines, weak lines of [O III] <span>(lambda)</span> 5007, [Ne III] <span>(lambda)</span> 3869, and He II <span>(lambda)</span> 4686, and a Balmer jump in emission. The emission spectrum is found to be variable on both the long and very short timescales. A high-resolution spectrum (<span>(R=25000)</span>) obtained with the new CMO spectrograph showed the double-peaked shape of the H<span>(alpha)</span> line and the presence of an absorption component in it. The October 14, 2023 photometric monitoring revealed a flickering in the <span>(B)</span> band with an amplitude of <span>(0overset{textrm{m}}{.}8)</span> on a timescale of 10–15 minutes. The luminosity, effective temperature, and radius of the V520 And cool component were determined: <span>(L=1400{-}2200;L_{odot})</span>, <span>(T_{textrm{eff}}=3200)</span> K, and <span>(R=120{-}155;R_{odot})</span>, respectively. Evidence for the presence in the system of an accretion disk with the luminosity <span>(L&lt;10;L_{odot})</span> was also found.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"58 - 68"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Searching for Traces of Exoplanet Atmospheres Using Multicolor Photometric Observations of Transits 利用凌日的多色光度观测寻找系外行星大气的痕迹
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341325600061
E. V. Bekesov, K. A. Lyzenko, A. M. Cherepashchuk, A. A. Belinsky, N. A. Maslennikova, A. M. Tatarnikov
{"title":"Searching for Traces of Exoplanet Atmospheres Using Multicolor Photometric Observations of Transits","authors":"E. V. Bekesov,&nbsp;K. A. Lyzenko,&nbsp;A. M. Cherepashchuk,&nbsp;A. A. Belinsky,&nbsp;N. A. Maslennikova,&nbsp;A. M. Tatarnikov","doi":"10.1134/S1990341325600061","DOIUrl":"10.1134/S1990341325600061","url":null,"abstract":"<p>The paper presents the results of study of the exoplanet systems HD 189733, HAT-P-13, HAT-P-16 and HAT-P-65. The multi-color photometric observations of exoplanet transits in the listed systems were carried out in blue and red rays using the equipment of the Caucasian Mountain Observatory and the Crimean Astronomical Station of the SAI MSU. Based on the results, light curves were plotted, from which the radii of the exoplanets were determined. The shown difference in the radii of the exoplanets in different filters may indicate the presence of atmospheres in the exoplanets under study.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"69 - 82"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Possibilities for Studying Star-Formation Processes at IRAO ‘‘Suffa’’: Objects and Tasks 在IRAO“Suffa”研究恒星形成过程的可能性：对象和任务
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341324601011
A. S. Hojaev, I. I. Zinchenko
{"title":"Possibilities for Studying Star-Formation Processes at IRAO ‘‘Suffa’’: Objects and Tasks","authors":"A. S. Hojaev,&nbsp;I. I. Zinchenko","doi":"10.1134/S1990341324601011","DOIUrl":"10.1134/S1990341324601011","url":null,"abstract":"<p>We describe the general remaining unclear issues of the star-formation process that could be studied using the millimeter radio telescope on the Suffa plateau (Uzbekistan). A description of possible objects of study is given. The possibilities of solving scientific problems in studying these objects using various instruments are assessed: the 70-m RT-70 radio telescope, a smaller-diameter antenna (15–20 m), and an antenna array consisting of small (3–8 m) antennas.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"140 - 161"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural and Kinematic Features of the Gaseous Envelope of the Unusual Herbig Ae Star HD 179218 II. Long-term Spectral and Photometric Variability 不寻常的赫比格Ae星HD 179218 II气体包层的结构和运动特征。长期光谱和光度变异性
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341324600819
N. Z. Ismailov, M. A. Pogodin, A. F. Kholtygin, H. N. Adigozalzade, O. V. Kozlova, A. A. Ivanova
{"title":"Structural and Kinematic Features of the Gaseous Envelope of the Unusual Herbig Ae Star HD 179218 II. Long-term Spectral and Photometric Variability","authors":"N. Z. Ismailov,&nbsp;M. A. Pogodin,&nbsp;A. F. Kholtygin,&nbsp;H. N. Adigozalzade,&nbsp;O. V. Kozlova,&nbsp;A. A. Ivanova","doi":"10.1134/S1990341324600819","DOIUrl":"10.1134/S1990341324600819","url":null,"abstract":"<p>This paper is the second in a series of papers dedicated to the analysis of spectral and photometric observations of the Herbig Ae/Be star HD 179218. The variations in the H<span>(alpha)</span> and H<span>(beta)</span> line profiles in the star’s spectrum and the variations in its brightness and color indices in the <span>(UBVRI)</span> system are investigated. Regular variations of the profiles with periods from 37 to 737 days at a significance level of <span>(10^{-4})</span> were revealed. Two of the found spectral periods agree with the photometric ones within the error limits. The regular spectral and photometric variability we discovered may indicate a presence of a companion or an exoplanet/exoplanets around the star, and may also be associated with the precession of the accretion disk and variation of the accretion rate.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"14 - 21"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Erratum to: Local Volume Dwarf Cas 1: Gas Metallicity, Extinction, and Distance 勘误：局部体积矮星Cas 1：气体金属丰度，消光和距离
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341325550024
S. A. Pustilnik, A. L. Tepliakova, A. S. Vinokurov
{"title":"Erratum to: Local Volume Dwarf Cas 1: Gas Metallicity, Extinction, and Distance","authors":"S. A. Pustilnik,&nbsp;A. L. Tepliakova,&nbsp;A. S. Vinokurov","doi":"10.1134/S1990341325550024","DOIUrl":"10.1134/S1990341325550024","url":null,"abstract":"","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"171 - 171"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Erratum to: Optical and X-Ray Variability of (boldsymbol{gamma}) Cas Stars II: SAO 49725 对(boldsymbol{gamma}) Cas Stars II: SAO 49725的光学和x射线变异性的勘误
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341325550012
A. F. Kholtygin, I. A. Yakunin, V. S. Bukharinov, D. N. Mokshin, E. B. Ryspaeva, O. A. Tsiopa
{"title":"Erratum to: Optical and X-Ray Variability of (boldsymbol{gamma}) Cas Stars II: SAO 49725","authors":"A. F. Kholtygin,&nbsp;I. A. Yakunin,&nbsp;V. S. Bukharinov,&nbsp;D. N. Mokshin,&nbsp;E. B. Ryspaeva,&nbsp;O. A. Tsiopa","doi":"10.1134/S1990341325550012","DOIUrl":"10.1134/S1990341325550012","url":null,"abstract":"","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"172 - 172"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structure of the Stellar Neighborhood of CQ Tau in the Presence of a Companion in an Elongated Orbit 在一个细长轨道上有伴星存在时CQ Tau的恒星邻域结构
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341325600085
T. V. Demidova
{"title":"Structure of the Stellar Neighborhood of CQ Tau in the Presence of a Companion in an Elongated Orbit","authors":"T. V. Demidova","doi":"10.1134/S1990341325600085","DOIUrl":"10.1134/S1990341325600085","url":null,"abstract":"<p>There are indirect signs of the presence of a companion near the star CQ Tau. A period of 10 years was found in the brightness variations. The image of the disk shows an extensive cavity with a size of about 25 AU, surrounded by a dust ring with a distribution maximum near 53 AU. A simulation of the interaction of dust and gas in the vicinity of a star with CQ Tau parameters was carried out assuming the existence of a companion in an orbit with a period of 10 years. It was shown that an M-type star in a highly elongated orbit is capable of forming a region of reduced density around the center of mass of the system, with a size close to the one observed. However, the dust ring-like structure in this case is located noticeably closer to the star than observed. Evidence has been obtained that a massive planet in an outer elongated orbit, could form a ring-shaped dust structure at a distance similar to that observed.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"38 - 48"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MAD-Accretion Scenario in High-Mass X-Ray Binaries with Neutron Stars 中子星高质量x射线双星的吸积过程
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341324600923
N. R. Ikhsanov, M. Yu. Piotrovich, N. G. Beskrovnaya
{"title":"MAD-Accretion Scenario in High-Mass X-Ray Binaries with Neutron Stars","authors":"N. R. Ikhsanov,&nbsp;M. Yu. Piotrovich,&nbsp;N. G. Beskrovnaya","doi":"10.1134/S1990341324600923","DOIUrl":"10.1134/S1990341324600923","url":null,"abstract":"<p>The wind-fed accretion of gas with an intrinsic magnetic field onto neutron stars in high-mass X-ray binaries (HMXBs) is discussed. The criteria for the implementation of quasi-spherical accretion in the system, the formation of a Keplerian accretion disk and a non-Keplerian magnetically arrested disk (MAD-accretion scenario) are formulated. It is shown that the period of the equilibrium rotation of a neutron star in the MAD-accretion scenario, in addition to the parameters of the binary system, is also determined by the velocity, temperature, and degree of magnetization of the stellar wind of its massive companion. Within the hypothesis of the equilibrium rotation, we have estimated the parameters of the stellar wind for the most fully-studied quasi-equilibrium accreting pulsars in the HMXBs corresponding to the criteria for the MAD-accretion scenario implementation. We show that the period of the equilibrium rotation of a neutron star in the system, all other things being equal, increases with the growth of the magnetization degree of the stellar wind component of its massive companion flowing out in the plane of the system’s orbit. Therefore, the periods of accreting pulsars in systems with similar parameters can differ from each other by several orders of magnitude and, under favorable conditions, reach values of several thousand and even tens of thousands of seconds.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"122 - 131"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cases of Further Integrability of the Equation of Motion in the Presence of the Local Integral in the Space Model. II 空间模型中存在局部积分时运动方程的进一步可积性。2
IF 1.3 4区 物理与天体物理
Astrophysical Bulletin Pub Date : 2025-05-26 DOI: 10.1134/S1990341325600048
F. T. Shamshiev
{"title":"Cases of Further Integrability of the Equation of Motion in the Presence of the Local Integral in the Space Model. II","authors":"F. T. Shamshiev","doi":"10.1134/S1990341325600048","DOIUrl":"10.1134/S1990341325600048","url":null,"abstract":"<p>A particular case of a local integral, published by Shamshiev in\u00002024, leads asymptotically to a potential with almost spherical\u0000symmetry at large distances <span>(r)</span>. The <span>(L(x,y,z)=textrm{const})</span> surfaces, which give the boundaries of the area of\u0000motion and are close to spheres, are found.</p>","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"80 1","pages":"132 - 139"},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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