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

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The Receiving System for a Compact Antenna of the Mobile VLBI Station 移动VLBI站小型天线接收系统
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0011
M. Zotov
{"title":"The Receiving System for a Compact Antenna of the Mobile VLBI Station","authors":"M. Zotov","doi":"10.22323/1.425.0011","DOIUrl":"https://doi.org/10.22323/1.425.0011","url":null,"abstract":"","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"30 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125385160","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
Deuterated molecules in regions of high-mass star formation 高质量恒星形成区域中的氘化分子
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0038
I. Zinchenko, A. G. Pazukhin, E. Trofimova, P. Zemlyanukha, C. Henkel, Magnus Thomasson Institute of Applied Physics of the Russ Sciences, Lobachevsky State University of Nizhni Novgorod, Russia., Max Planck Institut fur Radioastronomie, H Germany, Astron. Dept., Faculty of Computer Science, King Abdulaziz University, Jeddah, S. Arabia, C. U. Technology, O. Observatory, Sweden.
{"title":"Deuterated molecules in regions of high-mass star formation","authors":"I. Zinchenko, A. G. Pazukhin, E. Trofimova, P. Zemlyanukha, C. Henkel, Magnus Thomasson Institute of Applied Physics of the Russ Sciences, Lobachevsky State University of Nizhni Novgorod, Russia., Max Planck Institut fur Radioastronomie, H Germany, Astron. Dept., Faculty of Computer Science, King Abdulaziz University, Jeddah, S. Arabia, C. U. Technology, O. Observatory, Sweden.","doi":"10.22323/1.425.0038","DOIUrl":"https://doi.org/10.22323/1.425.0038","url":null,"abstract":"We present the results of our studies of deuterated molecules (DCN, DNC, DCO$^+$, N$_2$D$^+$ and NH$_2$D) in regions of high-mass star formation, which include a survey of such regions with the 20-m Onsala radio telescope and mapping of several objects in various lines with the 30-m IRAM and 100-m MPIfR radio telescopes. The deuteration degree reaches $sim$10$^{-2}$ in these objects. We discuss its dependencies on the gas temperature and velocity dispersion, as well as spatial distributions of deuterated molecules. We show that the H$^{13}$CN/HN$^{13}$C intensity ratio may be a good indicator of the gas kinetic temperature and estimate densities of the investigated objects.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121631400","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
Stellar mass black hole candidates in the birthplaces of radio pulsars 射电脉冲星诞生地的恒星质量黑洞候选者
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0057
L. Chmyreva, G. Beskin
{"title":"Stellar mass black hole candidates in the birthplaces of radio pulsars","authors":"L. Chmyreva, G. Beskin","doi":"10.22323/1.425.0057","DOIUrl":"https://doi.org/10.22323/1.425.0057","url":null,"abstract":"We performed a search for stellar-mass black hole (BH) candidates in the birth regions of 4 pulsars. We analyzed the available spectral, photometric and astrometric data to isolate 8 objects that exhibit characteristics corresponding to theoretical predictions for isolated BHs. We also discuss the observational manifestations of a stellar mass BH - the recently discovered microlens MOA-2011-BLG-191/OGLE-2011-BLG-0462. The data available for this object are used to calculate the parameters of its local interstellar medium, obtain the accretion rate and luminosity of the object, and construct its theoretical spectrum. A comparison of the spectrum with the sensitivity levels of several instruments shows that direct detection of the emission from this BH is possible for several future observing missions.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133044339","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
On turbulent viscosity in relativistic jets and accretion disks 相对论性喷流和吸积盘中的湍流粘度
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0058
A. Panferov
{"title":"On turbulent viscosity in relativistic jets and accretion disks","authors":"A. Panferov","doi":"10.22323/1.425.0058","DOIUrl":"https://doi.org/10.22323/1.425.0058","url":null,"abstract":"The mechanism of turbulent viscosity is the central question in investigations of turbulence. This is also the case in the accretion disk theory, where turbulence is considered to be responsible for the outward transport of angular momentum in the accretion disk. In turbulent flows, vortices transport momentum over their length scales providing the mechanism of viscosity that is controlled by mass entrainment. We have earlier proposed an entrainment model for the particular case of the relativistic jets in the radio galaxy 3C 31. In this paper, we further constrain the model parameters. The model (in the non-relativistic part) is successfully tested versus experimental and simulation data on the Reynolds stresses of free mixing layers and predicts the Smagorinsky constant 𝐶 S ≈ 0 . 11, which is consistent with the experimental range for shear flows 𝐶 S ≈ 0 . 1 − 0 . 12. For accretion disks, the entrainment model allows us to derive the same accretion mass rate as in the Shakura–Sunyaev 𝛼 -model without appealing to the turbulent kinematic viscosity 𝜈 t , and the viscosity parameter 𝛼 derived in the form 𝛼 = − 8 3 𝛽𝑠 T v t2 𝑐 2s depends on the power 𝑠 T of the temperature slope along the disk radius, 𝑇 ∝ 𝑟 𝑠 T , and quadratically on the turbulent velocity v t . The Multifaceted Observations","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127101166","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
Development of the prototype of a large-volume liquid scintillation detector with photosensors based on silicon photomultiplayers 基于硅光电多播放器的大体积液体闪烁探测器原型机的研制
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0002
I. Dzaparova, A. Yanin, E. Gorbacheva, A. Kurenya, V. Petkov, I. Unatlokov, A. Shikhin
{"title":"Development of the prototype of a large-volume liquid scintillation detector with photosensors based on silicon photomultiplayers","authors":"I. Dzaparova, A. Yanin, E. Gorbacheva, A. Kurenya, V. Petkov, I. Unatlokov, A. Shikhin","doi":"10.22323/1.425.0002","DOIUrl":"https://doi.org/10.22323/1.425.0002","url":null,"abstract":"At present, the Institute for Nuclear Research of RAS carries out work on the creation of a large-volume scintillation detector at the Baksan Neutrino Observatory (BNO) to register natural low-energy neutrino fluxes, including from astrophysical sources. One of the prototypes of such a detector being developed at the BNO is an acrylic sphere with a diameter of 500 mm filled with a liquid scintillator. Matrices of silicon photomultipliers (SiPM) as photosensors are used to measure the total light output from the interaction of particles in the scintillator and to obtain images of such events. This approach makes it possible to separate useful events from background ones and thereby to lower the background when monitoring Supernova explosions in our Galaxy. The paper describes the prototype of a large-volume detector and presents the measurement results. The Multifaceted Universe: Theory Observations","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"21 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116540438","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
Long-term X-ray/UV observations of the ultraluminous X-ray source HolmbergII X-1. 超亮x射线源HolmbergII X-1的长期x射线/紫外观测。
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0056
K. Atapin, A. Vinokurov, M. Safonova, S. Fabrika, O. Bordoloi
{"title":"Long-term X-ray/UV observations of the ultraluminous X-ray source HolmbergII X-1.","authors":"K. Atapin, A. Vinokurov, M. Safonova, S. Fabrika, O. Bordoloi","doi":"10.22323/1.425.0056","DOIUrl":"https://doi.org/10.22323/1.425.0056","url":null,"abstract":"Ultraluminous X-ray sources (ULXs) are point-like extra-galactic sources with luminosities ex-ceeding the Eddington limit for stellar-mass black holes. The results of our recent observations of one of these sources – Holmberg II X-1 – with the Astrosat observatory prompted us to look at the long-term brightness and spectral variability of this source using the Swift/XRT observations. We found that after being in the state of low variability ( ≲ 2 times) and hard spectrum ( Γ ∼ 1 . 8) for about ten years, the source returned to the state with high variability ( ≳ 10 times ) and a soft spectrum ( Γ ∼ 2 . 5). Thus, during the time of the Swift monitoring of more than 15 years, the ULX experienced state transitions at least 3 times. Also we found that the period of 27 days observed in the variable state and vanished in the steady state appeared again as the source returned to the variable state. Further analysis and modeling are necessary to shed light on the possible mechanisms of the observed state transitions of Holmberg II X-1. The Multifaceted Universe: Theory and Observations 2022","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121207065","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
Fast transitions between single and double-peaked optical pulse profiles of millisecond pulsar J1023$+$0038 毫秒脉冲星J1023$+$0038单峰和双峰光脉冲谱的快速跃迁
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0059
A. Tanashkin, G. Beskin, S. Karpov, V. Plokhotnichenko, Y. Shibanov, D. Zyuzin
{"title":"Fast transitions between single and double-peaked optical pulse profiles of millisecond pulsar J1023$+$0038","authors":"A. Tanashkin, G. Beskin, S. Karpov, V. Plokhotnichenko, Y. Shibanov, D. Zyuzin","doi":"10.22323/1.425.0059","DOIUrl":"https://doi.org/10.22323/1.425.0059","url":null,"abstract":"We report some results of optical observations of the transitional millisecond pulsar PSR J1023+0038, performed with the multi-channel panoramic photometer-polarimeter mounted on the 6-meter BTA telescope. The setup allowed us to register photons simultaneously in two channels (“red” and “blue”) with the effective temporal resolution of about 1 𝜇 s. We detected optical pulsations at the pulsar frequency with characteristics similar to the ones reported in other studies. In addition, during one of the nights we observed dramatic change in the pulse profile structure, mainly characterized by fast transition from double-peaked to single-peaked shape and back, and accompanied by flaring activity of the system. We analyse the results and discuss some aspects of their physical interpretation regarding the origin of the pulsing emission.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134240992","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
Stars like gamma Cassiopeia: close to us and enigmatic 像仙后座伽马这样的恒星:离我们很近，很神秘
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-16 DOI: 10.22323/1.425.0044
A. Kholtygin, E. Ryspaeva, Avastasia Moiseeva, M. Burlak, I. Yakunin, O. Tsiopa
{"title":"Stars like gamma Cassiopeia: close to us and enigmatic","authors":"A. Kholtygin, E. Ryspaeva, Avastasia Moiseeva, M. Burlak, I. Yakunin, O. Tsiopa","doi":"10.22323/1.425.0044","DOIUrl":"https://doi.org/10.22323/1.425.0044","url":null,"abstract":"","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133214273","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
Wind parameters of the new LBV in NGC1156 NGC1156中新型LBV的风参数
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-09-13 DOI: 10.22323/1.425.0049
Y. Solovyeva, A. Kostenkov, E. Dedov, A. Vinokurov
{"title":"Wind parameters of the new LBV in NGC1156","authors":"Y. Solovyeva, A. Kostenkov, E. Dedov, A. Vinokurov","doi":"10.22323/1.425.0049","DOIUrl":"https://doi.org/10.22323/1.425.0049","url":null,"abstract":"In this work we present the spectrum modeling results for the newly discovered luminous blue variable (LBV) in the NGC 1156 galaxy. Extended atmosphere models were calculated using the non-LTE code CMFGEN. We have obtained the luminosity of the discovered LBV 𝐿 (cid:39) ( 1 . 6 ± 0 . 2 ) × 10 6 𝐿 (cid:12) , effective temperature 𝑇 eff = 7 . 9 ± 0 . 4 kK and mass-loss rate (cid:164) 𝑀 𝑓 − 0 . 5 = ( 8 . 2 ± 1 . 0 ) × 10 − 4 𝑀 (cid:12) yr − 1 . The hydrogen abundance in the wind is ≈ 20 % for the metallicity 𝑍 = 0 . 5 𝑍 (cid:12) of the host galaxy. The Multifaceted Universe: Theory and Observations - 2022 (MUTO2022)","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122082193","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
Pushchino multibeams pulsar search: First results 普什奇诺多波束脉冲星搜索:初步结果
Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022) Pub Date : 2022-08-09 DOI: 10.22323/1.425.0043
S. Tyul’bashev, G. E. Tyul’basheva, M. Kitaeva
{"title":"Pushchino multibeams pulsar search: First results","authors":"S. Tyul’bashev, G. E. Tyul’basheva, M. Kitaeva","doi":"10.22323/1.425.0043","DOIUrl":"https://doi.org/10.22323/1.425.0043","url":null,"abstract":"Since the discovery of pulsars, dozens of surveys have already been conducted with their searches. In the course of surveys in the sky, areas from thousands to tens of thousands of square degrees are explored. Despite repeated observations of the same areas, new pulsars are constantly being discovered. We present Pushchino Multibeam Pulsar Search (PUMPS), having a sensitivity that is an order of magnitude higher than the sensitivity of all previously made surveys on pulsar search. In PUMPS daily round-the-clock observations are carried out of the area located on declinations $-9^o<delta<+42^o$. The survey is carried out on 96 beams of a Large Phased Array (LPA) at a frequency of 111 MHz. During the observation period of August 2014 - August 2022, the survey was repeated approximately 3,000 times. The expected sensitivity in the survey reaches up to 0.1 mJy. The paper considers some tasks that can be solved when processing the received data.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122886287","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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