The OGLE Collection of Variable Stars. One Thousand Heartbeat Stars in the Galactic Bulge and Magellanic Clouds

We present a collection of 991 heartbeat star (HBS) candidates found in the Optical Gravitational Lensing Experiment (OGLE) project data archive. We discuss the selection process of the HBS candidates and the structure of the catalog itself. It consists of 512 stars located toward the Galactic bulge (GB), 439 stars located in the Large Magellanic Cloud (LMC), and 40 in the Small Magellanic Cloud (SMC). The collection contains two large groups of HBSs with different physical properties. The main distinction between the two groups is the evolutionary status of the primary star. The first group of about 100 systems contains a hot main-sequence (MS) or a Hertzsprung-gap primary star, while the second group of about 900 systems includes a red giant (RG). For each star, we provide two-decade-long time-series photometry, in the Cousins $I$- and Johnson $V$-band filters, obtained by the OGLE project. We also present basic observational information as well as orbital parameters derived from the light curve modeling.Comment: 15 pages, 10 figures, 5 tables, submitted to AAS Journals. The full machine-readable tables and links to the catalog will be available after the acceptance of the pape

The OGLE collection of variable stars : nearly 66,000 Mira stars in the Milky Way

We present a collection of 65,981 Mira-type variable stars found in the Optical Gravitational Lensing Experiment (OGLE) project database. Two-thirds of our sample (40,356 objects) are located in the Galactic bulge fields, whereas 25,625 stars are in the Galactic disk. The vast majority of the collection (47,532 objects) comprises new discoveries. We provide basic observational parameters of the Mira variables: equatorial coordinates, pulsation periods, I-band and V-band mean magnitudes, I-band brightness amplitudes, and identifications in other catalogs of variable stars. We also provide the I-band and V-band time-series photometry collected since 1997 during the OGLE-II, OGLE-III, and OGLE-IV phases. The classical selection process, i.e., being mostly based on the visual inspection of light curves by experienced astronomers, has led to the high purity of the catalog. As a result, this collection can be used as a training set for machine-learning classification algorithms. Using overlapping areas of adjacent OGLE fields, we estimate the completeness of the catalog to be about 96%. We compare and discuss the statistical features of Miras located in different regions of the Milky Way. We show examples of stars that change their type over time, from a semiregular variable to Mira and vice versa. This data set is perfectly suited to studying the three-dimensional structure of the Milky Way, and it may help to explain the puzzle of the X-shaped bulge

A three-dimensional map of the milky way using 66,000 mira variable stars

We study the three-dimensional structure of the Milky Way using 65,981 Mira variable stars discovered by the Optical Gravitational Lensing Experiment survey. The spatial distribution of the Mira stars is analyzed with a model containing three barred components that include the X-shaped boxy component in the Galactic center (GC) and an axisymmetric disk. We take into account the distance uncertainties by implementing the Bayesian hierarchical inference method. The distance to the GC is R0 = 7.66 ± 0.01(stat.) ± 0.39(sys.) kpc, while the inclination of the major axis of the bulge to the Sun–GC line of sight is θ = 20fdg2 ± 0fdg6(stat.) ± 0fdg7(sys.). We present, for the first time, a detailed three-dimensional map of the Milky Way composed of young and intermediate-age stellar populations. Our analysis provides independent evidence for both the X-shaped bulge component and the flaring disk (being plausibly warped). We provide the complete data set of properties of Miras that were used for calculations in this work. The table includes mean brightness and amplitudes in nine photometric bands (covering a range of wavelengths from 0.5 to 12 μm), photometric chemical type, estimated extinction, and calculated distance with its uncertainty for each Mira variable. The median distance accuracy to a Mira star is at the level of 6.6%

OGLE-2014-BLG-0962 and a Comparison of Galactic Model Priors to Microlensing Data

OGLE-2014-BLG-0962 (OB140962) is a stellar binary microlensing event that was well covered by observations from the Spitzer satellite as well as ground-based surveys. Modeling yields a unique physical solution: a mid-M+M-dwarf binary with M_(prim) = 0.20 ± 0.01 M☉ and M_(sec) = 0.16 ± 0.01 M☉, with projected separation of 2.0 ± 0.3 au. The lens is only D_(LS) = 0.41 ± 0.06 kpc in front of the source, making OB140962 a bulge lens and the most distant Spitzer binary lens to date. In contrast, because the Einstein radius (θ_E = 0.143 ± 0.007 mas) is unusually small, a standard Bayesian analysis, conducted in the absence of parallax information, would predict a brown dwarf binary. We compare the results of Bayesian analysis using two commonly used Galactic model priors to the measured values for a set of Spitzer lenses. We find all models tested predict lens properties consistent with the Spitzer data. Furthermore, we illustrate the methodology for probing the Galactic distribution of planets by comparing the cumulative distance distribution of the Spitzer two-body lenses to that of the Spitzer single lenses

International Academic Conference Central and Eastern Europe in the International Politics of the Twentieth and Twenty-First Centuries 7–8 November 2022, Kraków

Słowo wstępne: "Oddajemy w Państwa ręce księgę abstraktów międzynarodowej konferencji naukowej „Europa Środkowo-Wschodnia w polityce międzynarodowej XX i XXI wieku”, która w dniach 7–8 listopada 2022 r. gromadzi w murach Krakowskiej Akademii im. Andrzeja Frycza Modrzewskiego doświadczonych badawczy, doktorantów i studentów z Polski i zagranicy. Konferencja została zorganizowana przez Katedrę Stosunków Międzynarodowych Krakowskiej Akademii im. Andrzeja Frycza Modrzewskiego we współpracy z Instytutem Historii i Archiwistyki Uniwersytetu Pedagogicznego im. KEN w Krakowie (współorganizator). Partnerami naukowymi są Instytut Historyczny Uniwersytetu Szczecińskiego (organizator pierwszej części konferencji, przeprowadzonej w dniu 26 maja 2022 r.), Katedra Badań nad Obszarem Eurazjatyckim Uniwersytetu Jagiellońskiego w Krakowie oraz Instytut Zachodni im. Zygmunta Wojciechowskiego. Celem konferencji jest wniesienie wkładu w dyskusję naukową o historycznych doświadczeniach państw Europy Środkowo-Wschodniej oraz współczesnych wyzwaniach i zagrożeniach, z którymi są konfrontowane rządy i społeczeństwa państw tego regionu."(...)Patronat honorowy Prof. KAAFM dr Klemens Budzowski – Rektor Krakowskiej Akademii im. Andrzeja Frycza Modrzewskiego Oddział Krakowski Polskiego Towarzystwa Studiów Europejskic

Masterplan 60+: Strategia wsparcia seniorów Nadodrza

info:eu-repo/semantics/publishe

Body dimensions and weight to height indices in rescuers from the State Fire Service of Poland

Few studies have been published in Poland concerning body dimensions of firefighters from the State Fire Service although this knowledge is needed for e.g. development of personal protective equipment. The aim of the study was to evaluate body dimensions and weight-to-height ratio in firefighters from the State Fire Service. Using the anthropological procedures, body mass (BM) and body height (BH) were examined in 178 men at the chronological age (CA) of 19.5 to 53 years who were rescuers from the national rescue and fire brigades of the State Fire Service. The study participants were divided into three categories of CA: up to 25 years, between 24 and 44 years, and over 44 years. The results were compared to population standards. It was found that BH of the youngest rescuers was significantly higher (0.05) than in other study participants. Based on the standardized values of BM and BMI, population of firefighters aged over 25 years was found to be characterized by overweight and, in certain cases, even by obesity. The excess level of body mass index (BMI ≥ 25 kgm2) was found in nearly 60% of study participants, with half of the group classified as overweight (n=31, BMI ranging from 25 to 29.9 kg/m2), and 10% classified as obese. Due to the worrying high percentage of cases of excess body mass in firefighters from the State Fire Service, it was found that it is recommended to evaluate the relationships between body height and mass on regular basis during periodical obligatory tests of physical fitness of rescuers from the State Fire Service and to increase the frequency and duration of training sessions