Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)最新文献_第2页

Accretion Induced Collapse of White Dwarfs as an Alternative Symbiotic Channel to Millisecond Pulsars 吸积诱导的白矮星塌缩是毫秒脉冲星的另一种共生通道

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-29 DOI: 10.22323/1.425.0050

Ali Taani

引用次数: 0

Analysis of Pulsation Spectra of Chromospheric Radiation from a Solar Flare SOL2015-10-01 太阳耀斑的色球辐射脉动光谱分析[j]

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-29 DOI: 10.22323/1.425.0062

Y. A. Kupryakov, Aleksej Borisovich Gorshkov, L. Kashapova, M. Bárta

引用次数: 0

Gaia vs Hipparcos: the Accuracy of Parallax Measurements 盖亚vs依巴谷:视差测量的准确性

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-29 DOI: 10.22323/1.425.0010

M. Al-Wardat, A. M. Hussein, Enas M. Abu-Alrob

{"title":"Gaia vs Hipparcos: the Accuracy of Parallax Measurements","authors":"M. Al-Wardat, A. M. Hussein, Enas M. Abu-Alrob","doi":"10.22323/1.425.0010","DOIUrl":"https://doi.org/10.22323/1.425.0010","url":null,"abstract":"We present a solution for the problem of the discrepancy in the measured trigonometric parallaxes for the stellar binary system HIP 84092. To solve the discrepancy, we used the orbital parameters and our method for analyzing binary and multiple stellar systems (BMSSs)s, described by Al-Wardat in 2002. We used all the available parallax measurements from Gaia DR3, DR2 and Hipparcos-2 in estimating the fundamental parameters of the individual components of the system. Such measurements are usually affected by the orbital motion of the components and the shift of the system photocenter. The masses estimated using the Al-Wardat method along with the modified orbital elements lead to a new dynamical parallax for the system 𝜋 𝐷𝑦𝑛 = 8 . 24 ± 0 . 15 mas, which lies in between the measurements of Hipparcos-2 (8 . 29 ± 0 . 97 mas) and Gaia DR3 (8 . 4806 ± 0 . 4863 mas), while the parallax from Gaia DR2 (20 . 0561 ± 1 . 1615 mas) is far from being accurate. This can be explained by the fact that the Gaia telescope has a higher resolution than that of Hipparcos. Based on the fundamental parameters of the binary system components and their positions on the evolutionary tracks, we conclude that the system consists of A7.5 and F1 solar-metalicity main-sequence stars with an age of 0.708 Gyr. Fragmentation is proposed as the most likely scenario for the formation and evolution of the","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123969123","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: 1

Forecasting of Solar Flares According to the Maximum Brightness Temperatures in the Period of 2011--2015 2011—2015年太阳耀斑最大亮温预报

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-28 DOI: 10.22323/1.425.0066

E. A. Kurochkin

{"title":"Forecasting of Solar Flares According to the Maximum Brightness Temperatures in the Period of 2011--2015","authors":"E. A. Kurochkin","doi":"10.22323/1.425.0066","DOIUrl":"https://doi.org/10.22323/1.425.0066","url":null,"abstract":"The main aim of our investigation is the search for new signs to predict solar flares. There are at least two ways to find such signs. The first one is statistical, where it is necessary to analyze a number of active region (AR) physical characteristics (area, full fluxes, spectra, etc.) and find correlations between some physical parameters and the flaring activity of the ARs. The other way is the deep analysis of ARs (specrum types in microwaves, polarization configuration of microwave sources, complexity of photospheric magnetic fields, etc.) to find the physical reasons of flares. The increased brightness of microwave radiation in 2011–2015 is considered as a preflare sign in this paper. There are a number of signs of preflare active region activity both in the optical and radio bands. An example of the preflare sign is the degree of complexity of photospheric magnetic fields in the AR. In microwaves, it is possible to estimate the radio emission flux from the AR or the brightness of radio emission sources at one or several frequencies. This paper analyzes the increased brightness of microwave sources in the 24th cycle of solar activity and the full microwave fluxes of ARs using the RATAN-600 data. It is shown that some ARs with high brightness temperatures generate a number of powerfull (M and X class) flares and also that the spectra of full microwave fluxes of the AR in the case of NOAA 12192 have features of high flare activity.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121075550","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 Intraday multi-frequency radio observations of the microquasar Cygnus X-3 微类星体天鹅座X-3的日间多频射电观测

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-27 DOI: 10.22323/1.425.0046

A. Shevchenko, S. Trushkin, N. N. Bursov, N. A. Nizhelskij, P. Tsybulev, A. A. Kudryashova, A. N. Borisov

{"title":"The Intraday multi-frequency radio observations of the microquasar Cygnus X-3","authors":"A. Shevchenko, S. Trushkin, N. N. Bursov, N. A. Nizhelskij, P. Tsybulev, A. A. Kudryashova, A. N. Borisov","doi":"10.22323/1.425.0046","DOIUrl":"https://doi.org/10.22323/1.425.0046","url":null,"abstract":"The results of the intraday multi-frequency monitoring of Cygnus X-3 during four flares in 2019-2021 are presented. Study of the radio spectra evolution at different time scales is the key for understanding the formation of jets during the accretion of the matter from a Wolf-Rayet star to a black hole or a neutron star. We carried out long-term almost daily observations of bright microquasars at frequencies 1.2-30 GHz during last years (see Trushkin et al in this value). Since August 2016, Cygnus X-3 has entered a new active phase (as a rule, characterized by the hyper-soft X-ray state). We detected the giant flares in 2016, 2017, 2019, 2020 and 2021. The first time the intraday observations of the last flares (2019-2021) were carried out with the southern sector of the antenna with a flat mirror, when 31 measurements at 1-3 frequencies around a local culmination time were made with time steps of about ten minutes. We have detected a clear evolution of the spectra during the 5.5 hours of the sets. We detected the very beginning of the flare on 18 April 2019 and found the linear growth of the fluxes, starting sumultaniously on MJD 58651.0. These new data could be used for the modeling of synchrotron radiation in relativistic jets. The Multifaceted Universe: and -","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122992398","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

Spectral and photometric study of the Seyfert Galaxy MRK 1095 (ARK 120) 塞弗特星系MRK 1095 (ARK 120)的光谱和光度研究

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-27 DOI: 10.22323/1.425.0028

S. Shomshekova, E. Denissyuk

引用次数: 0

Continuum radiometers of the RATAN-600 radio telescope: current state and directions of development RATAN-600射电望远镜连续辐射计:现状与发展方向

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-27 DOI: 10.22323/1.425.0015

P. Tsybulev, N. A. Nizhelskij, M. V. Dugin, A. N. Borisov, R. Udovitskiy, D. V. Kratov

引用次数: 0

On the role of empirical boundary conditions in space weather prediction results 经验边界条件在空间天气预报结果中的作用

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-27 DOI: 10.22323/1.425.0004

M. Demidov

{"title":"On the role of empirical boundary conditions in space weather prediction results","authors":"M. Demidov","doi":"10.22323/1.425.0004","DOIUrl":"https://doi.org/10.22323/1.425.0004","url":null,"abstract":"Prediction of the conditions in the near-Earth space environment (space weather) is an urgent scientific and practical task, and there are several scientific teams in the world which have been deeply involved in this research using various model assumptions. One of the most important problems in such calculations is the reliability of the initial data – synoptic maps of the solar magnetic fields. The most famous Space Weather Prediction Center (SWPC) uses observations of the Global Oscillations Network Group (GONG). However, there are other sources of measurements of the full-disk solar magnetic fields (WSO, SDO/HMI and SOLIS in the USA, IRmag at Mitaka in Japan, SMAT in China, STOPs in Russia), and it is of interest to use them to calculate the parameters of the solar wind. In this paper this is done on the example of Carrington Rotation (CR) 2164 using observations from Wilcox Solar Observatory (WSO), GONG, Solar Telescope for Operative Prediction (STOP) at the Sayan Solar Observatory (SSO). The calculations are based on the Wang-Sheeley-Arge (WSA) model and include the determination of the parameters of the coronal magnetic field in the Potential Field Source Surface (PFSS) approximation. The propagation of the solar wind to Earth’s orbit is calculated using the HUX (Heliospheric Upwind eXtrapolation) model. It is shown that the differences in solar wind speeds for different data sets can reach 200 km/s or even more. The results of model simulations are compared with the experimental ACE satellite data.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131196071","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 intensities of Balmer lines in low resolution integrated light spectra of globular clusters 球状星团低分辨率积分光谱巴尔默谱线的强度

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-27 DOI: 10.22323/1.425.0020

Margarita Sharina, M. Maricheva, V. Shimanskii

{"title":"The intensities of Balmer lines in low resolution integrated light spectra of globular clusters","authors":"Margarita Sharina, M. Maricheva, V. Shimanskii","doi":"10.22323/1.425.0020","DOIUrl":"https://doi.org/10.22323/1.425.0020","url":null,"abstract":"We introduce a study of the depths and widths of Balmer absorption lines in low resolution ( Δ 𝜆 / 𝜆 ∼ 1000) integrated light (IL) spectra of globular clusters (GCs) depending on the following parameters: age, metallicity (Z) and helium mass fraction (Y). The parameters of stellar atmospheres used to calculate synthetic IL spectra of GCs are set by theoretical isochrones of stellar evolution. As the age increases, the luminosities and effective temperatures of the Main sequence turnoff stars decrease. The analysis of low resolution spectra demonstrates that the depths and widths of the Balmer absorption lines H 𝛿 , H 𝛾 and H 𝛽 in IL spectra of GCs decrease accordingly. On the other hand, as the contribution of hot blue horizontal branch (HB) stars in IL spectra becomes more and more significant, the depths and widths of hydrogen lines increase. These changes are non-monotonic. In this paper we explore characteristics of these changes in spectra of GCs with Z=0.002. Our study contributes to the progress of the research on the properties of HB stars, the contribution of their radiation to IL spectra of GCs and the accuracy of determination of ages and Y for GCs in galaxies.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133316975","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

Confirmation of the star J004229.87$+$410551.8 in M31 as B[e]-supergiant 确认M31中的恒星J004229.87$+$410551.8为B[e]-超巨星

Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-27 DOI: 10.22323/1.425.0047

A. Sarkisyan, A. Vinokurov, Solovyeva Yu., K. Atapin, O. Sholukhova, S. Fabrika, D. Bizyaev

引用次数: 0