{"title":"Could the number of blue straggler stars help to determine the age of their parent globular cluster?","authors":"F. L. D. Andr'es","doi":"10.54647/astronomy160048","DOIUrl":"https://doi.org/10.54647/astronomy160048","url":null,"abstract":"A recent study shows, from an empirical deduction, that the number and the presence of the blue straggler stars (BSS) in an open cluster follow a function whose components are the ratio between age and the relaxation time, $it f$, and a factor, $varpi$ , which is an indicator of stellar collisions plus primordial binaries. The relation among the number of blue straggler stars, the factor $it f$, and the factor $varpi$ of each globular cluster allows for deriving the age of the respective globular clusters. This method has been applied individually over 56 globular clusters containing BSS. The values derived for the cluster ages from our methodology do not differ from those derived from other methods. A special case is cluster NGC 104 whose age exceeds 13.8 Gyr (its age is between 19.04 and 20.30 Gyr), which would have a very exotic explanation: the existence of an intermediate black hole in the center of the cluster. That black hole main-sequence star (BH-MS) binaries with an initial orbital period less than the bifurcation period can evolve into ultra-compact X-ray binaries (UCXBs) that can be detected by LISA. On the other hand, if that age were true, it would call into question the expansion velocity for a flat Universe. This would call into question the case for dark energy dominated Universe.","PeriodicalId":247310,"journal":{"name":"SCIREA Journal of Astronomy","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115724867","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":"Ultrasonic technology of detection of gravitational waves of neutron stars - pulsars","authors":"Chernobay Ivan Alesandrovich","doi":"10.54647/astronomy160044","DOIUrl":"https://doi.org/10.54647/astronomy160044","url":null,"abstract":"The work relates to the creation of new methods and instruments for observational astronomy, in particular to gravitational astrophysics. The ultrasonic gravitational method for obtaining information about such exotic objects as neutron pulsar stars has been developed and successfully tested. Gravitational waves are detected by isolated and processed ultrasonic signals propagating in acoustically transparent media. With the help of the developed equipment, it is possible to observe in the gravitational range any star out of many millions of actually detected neutron pulsar stars. The operation of the equipment allows measurements to confirm the stationarity and high stability of the gravitational frequency of a selected neutron star pulsar. The precessions of most neutron pulsars are detected in real time while confirming the high stability of their precession frequencies. Gravitational-wave glitches of some neutron pulsars have been detected, namely, unsteady variations of the frequency and amplitude of their gravitational oscillations, with amplitude increases of individual pulsars up to hundreds or thousands of times when their frequency changes by a small fraction of a percent. The equipment makes it possible to selectively isolate and listen to the selected neutron star-pulsar","PeriodicalId":247310,"journal":{"name":"SCIREA Journal of Astronomy","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121694141","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":"Basis on Negative Matter as Unified Dark Matter and Dark Energy","authors":"","doi":"10.54647/astronomy160043","DOIUrl":"https://doi.org/10.54647/astronomy160043","url":null,"abstract":"","PeriodicalId":247310,"journal":{"name":"SCIREA Journal of Astronomy","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125066767","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 THE ORIGIN OF MOON AND CONTINENTS","authors":"F. Barbiero","doi":"10.54647/astronomy16035","DOIUrl":"https://doi.org/10.54647/astronomy16035","url":null,"abstract":"","PeriodicalId":247310,"journal":{"name":"SCIREA Journal of Astronomy","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123539539","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}
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