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

{"title":"The splashback radius of groups and clusters of galaxies at low redshifts","authors":"F. Kopylova, A. Kopylov","doi":"10.22323/1.425.0024","DOIUrl":"https://doi.org/10.22323/1.425.0024","url":null,"abstract":"We present a study of the distribution of galaxies along the radius of 157 groups and clusters of galaxies (200 km s − 1 < 𝜎 < 1100 km s − 1 ) of the local Universe (0.01 < 𝑧 < 0.1). We introduced a new boundary of galaxy systems and identified it with the splashback radius 𝑅 𝑠𝑝 . We also identified the central region of galaxy systems with a radius of 𝑅 𝑐 . These radii are defined by the observed integrated distribution of the total number of galaxies depending on the squared distance from the center of the groups/clusters coinciding, as a rule, with the brightest galaxy. We show that the radius 𝑅 𝑠𝑝 is proportional to the 𝑅 200 𝑐 (radius of the virialized region of a galaxy cluster) and to the radius of the central region 𝑅 𝑐 with a slope close to 1. Among the obtained dependences of the radii on X-ray luminosity, the log 𝑅 𝑠𝑝 - log 𝐿 𝑋 relation has the lowest scatter. We measured < 𝑅 𝑠𝑝 > = 1 . 67 ± 0 . 05 Mpc for the total sample, < 𝑅 𝑠𝑝 > = 1 . 14 ± 0 . 14 Mpc for galaxy groups with 𝜎 ≤ 400 km s − 1 , < 𝑅 𝑠𝑝 > = 2 . 00 ± 0 . 20 Mpc for galaxy clusters with 𝜎 > 400 km s − 1 . We found the average ratio of the radii 𝑅 𝑠𝑝 / 𝑅 200 𝑐 = 1 . 40 ± 0 . 02 or 𝑅 𝑠𝑝 / 𝑅 200 𝑚 = 0 . 88 ± 0 . 02. The Multifaceted Universe: Theory and Observations - 2022 (MUTO2022)","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127745605","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}

{"title":"A study of the astroclimate in the Dagestan mountains Agul region and at the Ali Observatory in Tibet as possible locations for the Eurasian SubMM Telescopes (ESMT)","authors":"V. Khaikin, Khaikin Borisovich Vladimir Special Astrophysical✀ RAS vkhstu@mail.ru, Shikhovtsev Yurievich Artem Institute of Solar–Te✀ RAS Ashikhovtsev@iszf.irk.ru, Mironov Pavlovich Alexei Sternberg Astronomical I✀ Moscow State University almir@list.ru, Qian Xuan National Astronomical Observatories of ✀ CAS qianxuan@nao.cas.cn","doi":"10.22323/1.425.0072","DOIUrl":"https://doi.org/10.22323/1.425.0072","url":null,"abstract":"Using the ECMWF Reanalysis v5 (ERA5) and the GNSS method as well as meteorological and observational data, the statistics of the PWV, TCC, SD, and other astroclimate indicators were obtained for a number of possible ESMT locations in the Russian Federation. These sites are compared with the Ali observatory in Tibet and the BTA location area. The first results of the GNSS PWV measurements on Mt. Kurapdag convincingly confirm the choice made earlier using the ERA5 data.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127953231","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}

{"title":"The history of long-term studies of Galactic X-ray binaries with jet emissions with RATAN-600","authors":"S. Trushkin, A. Shevchenko, N. Bursov, P. G. Tsybulev, N. Nizhelsky","doi":"10.22323/1.425.0048","DOIUrl":"https://doi.org/10.22323/1.425.0048","url":null,"abstract":"The first \"Cold\" survey of the CMB anisotropy has been carried out for almost 100 days in 1980 with the Northern Sector of RATAN-600, by the decision of Yu.N. Parijskij at the declination of the most famous Galactic object SS 433. Interestingly then this very variable sources was stable at cantimeter wavelengths. Since 1980 we conduct regular observations of the SS433 and later of new discovered Galactic stellar radio sources, collectively called microquasars. Indeed the radio emission and SS 433 and the first the Galactic ’superluminal’ source GRS 1915+105 strongly resembles many well-known extragalactic sources associated with active galactic nuclei (AGNs). Already in the 1980s, VLA mapping of SS433 showed ’jet-like’ morphology of its radio emission. Also from VLBI mapping it became clear that the famous flaring radio source Cyg X-3, which contains either a black hole (BH) or a neutron star (NS) in the binary with a massive Wolf-Rayet star, has an elongated radio emission shape at small angular scales, again similar to quasars. Now our long-term intensive studies of SS 433 allow us to assert that all the flaring events have been detected over the past ten years, and the bright flares themselves are unambiguously associated with the features of jet activity, well studied using optical spectroscopy of the object. In GRS 1915+105, we found a lot of relatively bright flaries","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128080267","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}

{"title":"The Extremely He-rich Star HD144914","authors":"Y. Glagolevskij, Victor Bychkov Alexey Nazarenko","doi":"10.22323/1.425.0055","DOIUrl":"https://doi.org/10.22323/1.425.0055","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":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128524903","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}

{"title":"Sources of the \"Cold Experiment\" surveys in different ranges of the electromagnetic spectrum","authors":"O. Zhelenkova, Natalya S. Soboleva, E. Majorova, A. Temirova, N. N. Bursov","doi":"10.22323/1.425.0023","DOIUrl":"https://doi.org/10.22323/1.425.0023","url":null,"abstract":"A study of the panchromatic properties of radio sources makes it possible to research the evolution of active galactic nuclei and their relationship with the environment. The study was made of a complete sample of radio sources in terms of flux density from surveys of the \"Cold Experiment\", carried out on the RATAN-600 radio telescope at a frequency of 3.94 GHz in 1980–2000. We have found hosts for 95% of these radio sources. According to the radio luminosity estimates, most of the sources are powerful FRII type radio sources. Based on photometric data and color indices among the hosts we have identified groups of quasars, early-type galaxies, and late-type galaxies. Additionally, the late-type galaxies are subdivided into a smaller group with a relatively low radio loudness index and a larger group with a high index. Depending on the radio luminosity, the sources were divided into groups. In each group, the median of the ratio of the absolute magnitude to the radio luminosity was calculated, and the number of quasars and the number of galaxies were also calculated. Correlations are found whose behavior can be explained by a change in the screening properties of the torus. As the radio luminosity increases, the shielding properties of the torus decrease. Long-term variability was found with varying degrees of confidence in 18% of the radio sources. The hosts of these sources with magnitude R ≤ 18 𝑚 exhibit variability in the optical range as well. According to the multi-frequency maps of the Planck mission, for 70% of the sources of the RCR catalog, at a level ≲ 4 𝜎 , a positive signal was found at least at one frequency. The spectral studies confirm the connection of these positive spots with the radio sources. To search for the Sunyaev-Zel’dovich (SZ) effect, the studies of the properties of \"hot\" and \"cold\" spots near sources were carried out. 16% of the radio sources have signs of the SZ-effect at level ≲ 4 𝜎 . One fifth of them are in the catalogs of galaxy clusters, which confirms the applicability of our technique for searching for the effect in faint sources.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116743547","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}

{"title":"On a spin-up phase in the evolutionary tracks of AR Scorpii and AE Aquarii","authors":"N. Ikhsanov, N. Beskrovnaya","doi":"10.22323/1.425.0061","DOIUrl":"https://doi.org/10.22323/1.425.0061","url":null,"abstract":"A question about the origin of a pulsar-like white dwarf in the low-mass binary system AR Scorpii is discussed. In our consideration we follow the accretion-driven spin-up scenario previously developed to explain the origin of a strongly magnetized fast rotating white dwarf in AE Aquarii. We find that the origin of AR Scorpii can be explained within this scenario provided the surface magnetic field of the white dwarf during the spin-up epoch was screened by the accreting matter by a factor of 50-100. This finding suggests that the fast rotating strongly magnetized white dwarfs in both systems were formed by a common mechanism.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133383953","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}

{"title":"Neaby voids and their galaxies: recent progress and prospects","authors":"S. Pustilnik, Y. Perepelitsyna, A. Tepliakova, A. Kniazev, E. Egorova, J. Chengalur, Sushma Kurapati","doi":"10.22323/1.425.0026","DOIUrl":"https://doi.org/10.22323/1.425.0026","url":null,"abstract":"","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122049478","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}

{"title":"Some mathematical and physical aspects of the gravitational collapse of massive stars","authors":"V. Vertogradov, V. Dubrovich","doi":"10.22323/1.425.0042","DOIUrl":"https://doi.org/10.22323/1.425.0042","url":null,"abstract":"In this work we consider a new coordinate system in Schwarzschild spacetime. This coordinate frame describes the exterior geometry of a black hole but the black hole itself is a non-singular point. From the observational point of view we show that there is no difference between a usual black hole and our model.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116478197","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}

{"title":"Study of a bright sources sample in the RATAN-600 Western sector observations","authors":"A. A. Kudryashova, N. N. Bursov, S. Trushkin","doi":"10.22323/1.425.0018","DOIUrl":"https://doi.org/10.22323/1.425.0018","url":null,"abstract":"From June 2018 to May 2019, the 24 hours strip of the sky on the Crab nebula declination and from June 2020 to May 2021 the strip on the microquasar GRS 1915+105 declination were observed with a four-beam complex of four-channel sensitive radiometers, established in the focal line of the ”Western sector” of the RATAN-600 radio telescope. The main aim of these surveys was to search for the fast radio bursts, but in the report we discuss the traditional blind survey with a high sensitivity. We averaged the data received in narrow channels to achieve total sensitivity of about ∼ 5 mJy/beam for a total frequency band equal to 600 MHz at the frequency of 4.7 GHz. This value is only constrained by the effect of confusion for the antenna beam, having the angular sizes 1 ′ × 35 ′ . We obtained about 25 high-quality records of the 24 hour strip of the sky for every month of the observations and calculated 12 average drift scans. Here we considered a primary sample of 121 the most bright sources, detected in the both surveys. We identified these sources with the radio sources from different catalogs, collected in the CATS database. That allowed us to plot compiled radio spectra of the sources. We have analyzed spectra and light curves of all sources. Also we identified the sources with big optical and infrared catalogues, and found that sources are galaxies and quasars.","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"29 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":"134407716","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}

{"title":"Objects with Ultra Steep Spectra in the Central Section of the RATAN Zenith Field (RZF) Catalog","authors":"A. Temirova, Yu. N. Pariiskiy, T. Semenova, N. Bursov","doi":"10.22323/1.425.0071","DOIUrl":"https://doi.org/10.22323/1.425.0071","url":null,"abstract":"","PeriodicalId":355234,"journal":{"name":"Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)","volume":"88 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":"116015076","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}