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Contributions of the Astronomical Observatory Skalnate Pleso最新文献

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On the similarities of Stark broadening parameters within a Fe XXV multiplet 关于FeXXV多重态中Stark增宽参数的相似性
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-12-01 DOI: 10.31577/caosp.2022.52.3.15
M. Dimitrijević, M. Christova, S. Sahal-Bréchot
{"title":"On the similarities of Stark broadening parameters within a Fe XXV multiplet","authors":"M. Dimitrijević, M. Christova, S. Sahal-Bréchot","doi":"10.31577/caosp.2022.52.3.15","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.3.15","url":null,"abstract":". Stark broadening parameters, line widths and shifts, have been calculated for spectral lines within Fe XXV 3s 2 S J -3p 2 P oJ (cid:48) multiplet, by using the impact semiclassical perturbation theory. The obtained results have been used to demonstrate, that in spite of big differences of line width values expressed as usual in ˚A, they are practically the same when expressed in angular frequency units. This confirms that in the case of Fe XXV spectral lines we can use the known Stark broadening parameters, expressed in angular frequency units, to obtain the unknown ones, for other lines in the same multiplet. The obtained data are particularly interesting for neutron star atmospheres and environment investigation and modelling as well as for inertial fusion plasma.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44421125","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
Stark broadening of Si II spectral lines: comparison with experimental results Si II光谱线的明显展宽:与实验结果的比较
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-12-01 DOI: 10.31577/caosp.2022.52.3.25
M. Dimitrijević, M. Christova, S. Sahal-Bréchot
{"title":"Stark broadening of Si II spectral lines: comparison with experimental results","authors":"M. Dimitrijević, M. Christova, S. Sahal-Bréchot","doi":"10.31577/caosp.2022.52.3.25","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.3.25","url":null,"abstract":". Our calculations for Stark broadening parameters of Si II spectral lines obtained using impact semiclassical perturbation theory are compared with experimental data from the literature. Presented data are needed for the evaluation of the physical conditions of stellar plasma, siliciabundance deter-mination, opacity calculations, stellar spectra analysis and synthesis, stellar atmosphere modelling etc.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43437209","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
Electron-impact processes involving small molecular ions relevant for the astrochemistry 涉及与天体化学相关的小分子离子的电子撞击过程
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-12-01 DOI: 10.31577/caosp.2022.52.3.90
V. Srećković, L. Ignjatović, M. Dimitrijević
{"title":"Electron-impact processes involving small molecular ions relevant for the astrochemistry","authors":"V. Srećković, L. Ignjatović, M. Dimitrijević","doi":"10.31577/caosp.2022.52.3.90","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.3.90","url":null,"abstract":". We investigated the electron-impact processes involving hydrogen, lithium and sodium molecular cations. Rate coefficients for the dissociative recombination in domains of principal quantum numbers n ≥ 4 and temperatures from 500 K to 10 000K are reported. Considered collisional processes have an impact on the ionization level and atom excited-state populations as well on optical characteristics. The data are useful for the modeling of the kinetics of the Early Universe and for geocosmical plasma investigation.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44005722","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: 1
Influence of the solar hydrogen Lyα line on the GNSS signal delay in the ionospheric D-region 太阳氢Lyα线对电离层D区GNSS信号延迟的影响
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-12-01 DOI: 10.31577/caosp.2022.52.3.116
D. Petković, O. Odalović, A. Nina
{"title":"Influence of the solar hydrogen Lyα line on the GNSS signal delay in the ionospheric D-region","authors":"D. Petković, O. Odalović, A. Nina","doi":"10.31577/caosp.2022.52.3.116","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.3.116","url":null,"abstract":". Recent research indicates that the influence of the ionospheric D-region on the propagation of satellite signals cannot be ignored during the intense X-radiation emitted during solar X-ray flares. In this paper, we investigate the influence of changes in the solar hydrogen Ly α radiation, which is manifested in variations of the D-region electron density and, consequently, the total electron content in this region, on the propagation of the Global Navigation Satellite System (GNSS) signals. We consider changes during a solar cycle and year, represented by the smoothed daily sunspot number and the day of year. The obtained results indicate that the influence of the D-region on these signals is not negligible for positioning with a single signal recorded by a single receiver during the period around the maximum of a solar cycle.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49537199","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
New database for collisional excitation/ ionization processes of astrophysical interest 天体物理学感兴趣的碰撞激发/电离过程的新数据库
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-12-01 DOI: 10.31577/caosp.2022.52.3.71
V. Vujčić, V. Srećković, D. Jevremovic
{"title":"New database for collisional excitation/ ionization processes of astrophysical interest","authors":"V. Vujčić, V. Srećković, D. Jevremovic","doi":"10.31577/caosp.2022.52.3.71","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.3.71","url":null,"abstract":". In this paper, ACol database for the collisional processes in atom and Rydberg atom collisions is described. Database (DB) is hosted and is a part of the Serbian Virtual Observatory (SerVO) and VAMDC project. The database contains the rate coefficients for excitation and ionization collisional processes in hydrogen, helium and alkali plasmas. The ACol dataset could help with the investigation and modeling of laboratory low temperature plasmas as well as weakly ionized layers in various atmospheres and cosmic objects.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46745557","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
Transport coefficients for He+ ions in mixtures He/CF4: modeling laboratory and astrophysical plasmas He/CF4混合物中He+离子的输运系数：模拟实验室和天体物理等离子体
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-12-01 DOI: 10.31577/caosp.2022.52.3.78
Z. Nikitovic, Z. Raspopovic
{"title":"Transport coefficients for He+ ions in mixtures He/CF4: modeling laboratory and astrophysical plasmas","authors":"Z. Nikitovic, Z. Raspopovic","doi":"10.31577/caosp.2022.52.3.78","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.3.78","url":null,"abstract":"","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41434201","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
The usage of perceptron, feed and deep feed forward artificial neural networks on the spectroscopy data: astrophysical & fusion plasmas 感知器、馈入和深度前馈人工神经网络在光谱数据上的应用:天体物理和聚变等离子体
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-12-01 DOI: 10.31577/caosp.2022.52.3.97
N. Sakan, I. Traparić, V. Srećković, M. Ivković
{"title":"The usage of perceptron, feed and deep feed forward artificial neural networks on the spectroscopy data: astrophysical & fusion plasmas","authors":"N. Sakan, I. Traparić, V. Srećković, M. Ivković","doi":"10.31577/caosp.2022.52.3.97","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.3.97","url":null,"abstract":". Artificial neural networks are gaining a momentum for solving complex problems in all sorts of data analysis and classification matters. As such, idea of determining their usability on complex plasma came up. The choice for the input data for the analysis is a set of stellar spectral data. It consists of complex composition plasma under vast variety of conditions, dependent on type of star, measured with calibrated standardized procedures and equipment. The results of the analysis has shown that even a simple type of perceptron artificial neural network could lead to results of acceptable quality for the analysis of spectra of complex composition. The analyzed ANNs performed good on a limited data set. The results can be interpreted as a figure of merit for further development of complex neural networks in various applications e.g. in astrophysical and fusion plasmas.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45621726","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
The interaction between hyperons and the surface gravitational redshift of proto neutron star PSR J0740+6620 超子与原中子星PSR J0740+6620表面引力红移的相互作用
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-09-01 DOI: 10.31577/caosp.2022.52.2.58
X.F. Zhao
{"title":"The interaction between hyperons and the surface gravitational redshift of proto neutron star PSR J0740+6620","authors":"X.F. Zhao","doi":"10.31577/caosp.2022.52.2.58","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.2.58","url":null,"abstract":". An effect of the contributions from σ ∗ and φ mesons on the surface gravitational redshift of PNS PSR J0740+6620 is studied with relativistic mean field theory in consideration of a baryon octet. We find that the energy density ε increases relative to the same pressure p as the contributions from σ ∗ and φ mesons are taken into account. Relative to the same central energy density, the radius R of the PNS increases while the mass M , the mass radius ratio M/R and the surface gravitational redshift z of the PNS decrease, taking into account the contributions from σ ∗ and φ mesons. Under the constraint of mass M =2.08 M (cid:12) , considering the contributions from σ ∗ and φ mesons, for the PNS PSR J0740+6620, the radius decreases by about -0.08%, the central energy density increases by about 0.89%, the central pressure increased by about 0.76%, the mass radius ratio increases by about 0.08%, and the surface gravitational redshift increases by about 0.17% from z =0.31663 to z =0.31718.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46882926","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
Inverse problem of white dwarfs theory with rapid axial rotation 具有快速轴向旋转的白矮星理论的反问题
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-09-01 DOI: 10.31577/caosp.2022.52.2.25
M. Vavrukh, D. Dzikovskyi, S. Smerechynskyi
{"title":"Inverse problem of white dwarfs theory with rapid axial rotation","authors":"M. Vavrukh, D. Dzikovskyi, S. Smerechynskyi","doi":"10.31577/caosp.2022.52.2.25","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.2.25","url":null,"abstract":". The objects of research are three recently discovered white dwarfs from binary systems with rapid axial rotation and masses M ≤ M (cid:12) . The geometrical and mechanical characteristics (moment of inertia, equatorial gravity, the condition of stability in relation to rotation) are calculated for the white dwarf V1460 Her within an electron-nuclear model, based on the equilibrium equation and inferred from observations mass and period of axial rotation. Estimates of model parameters and macroscopic characteristics for inferred from observations periods of rotation are performed for white dwarfs LAMOST","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45399189","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
Photometric observations of six Mars-crossing asteroids with the 1-m INASAN telescope at Mt. Koshka 在科什卡山用1米INASAN望远镜对6颗穿越火星的小行星的光度观测
IF 0.5 4区 物理与天体物理
Contributions of the Astronomical Observatory Skalnate Pleso Pub Date : 2022-09-01 DOI: 10.31577/caosp.2022.52.2.44
A. Kravtsova, S. Barabanov, I. Volkov
{"title":"Photometric observations of six Mars-crossing asteroids with the 1-m INASAN telescope at Mt. Koshka","authors":"A. Kravtsova, S. Barabanov, I. Volkov","doi":"10.31577/caosp.2022.52.2.44","DOIUrl":"https://doi.org/10.31577/caosp.2022.52.2.44","url":null,"abstract":". We present observations of six asteroids crossing the orbit of Mars obtained at Mt. Koshka observatory of INASAN in 2014–2016. Our multicolor photometry made it possible to determine the apparent magnitudes of asteroids in BVRcIc photometric bands, as well as their taxonomic class according to Tholen’s classification. The periods of rotation were determined for asteroids 9773, 32575, 97679, and 313591. For asteroid 8355 Masuo the rotation period determined earlier was confirmed. Our observations support the long period of rotation for asteroid 122463 (presumably about 19 days).","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44619921","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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