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Contributions of the Astronomical Observatory Skalnaté Pleso最新文献

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Photometric sample of early B-type pulsators in eclipsing binaries observed with TESS 用 TESS 观测的食双星中早期 B 型脉冲星的光度样本
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.70
C.I. Eze, G. Handler
{"title":"Photometric sample of early B-type pulsators in eclipsing binaries observed with TESS","authors":"C.I. Eze, G. Handler","doi":"10.31577/caosp.2024.54.2.70","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.70","url":null,"abstract":". Asteroseismology coupled with eclipsing binary modelling shows great potential in improving the efficiency of measurements or calibrations of the interior mixing profile in massive stars. This helps, for instance in treating the challenging and mysterious discrepancies between observations and models of its stellar structure and evolution. This paper discusses the findings in our work titled β Cephei pulsators in eclipsing binaries observed with TESS , which aimed to compile a comprehensive catalogue of β Cep pulsators in eclipsing binaries. Seventy-eight (78) pulsators of the β Cep type in eclipsing binaries among which 59 new discoveries were reported. Here, we also report a fresh analysis of eight additional stars that were outside the scope of the earlier-mentioned work. Six β Cep pulsators in eclipsing binaries are reported, among which 5 are new discoveries and 1 is a confirmation of a candidate earlier suggested in the literature. Our sample allows for future ensemble asteroseismic modelling of massive pulsators in eclipsing binaries to treat the discrepancy between observations and models.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"1552 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140466702","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
TYC 1083-12-1 -- an SB2 binary mimicking an exoplanetary candidate TYC 1083-12-1 -- 模仿系外行星候选者的 SB2 双星
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.182
M. Skarka, J. Lipták, D. Stoklásek, P. Cagaš, P. Kabáth
{"title":"TYC 1083-12-1 -- an SB2 binary mimicking an exoplanetary candidate","authors":"M. Skarka, J. Lipták, D. Stoklásek, P. Cagaš, P. Kabáth","doi":"10.31577/caosp.2024.54.2.182","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.182","url":null,"abstract":". TYC 1083-12-1 (sp. type F8V) was identified as a potential ex-oplanetary candidate in the data from a photometric survey with a 30-cm telescope. From the radial velocity observations of the star, we found that it is a double-lined binary with very similar components. We present the basic parameters of this system.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"133 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469979","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
First determination of the system parameters in five contact binaries 首次测定五个接触双星的系统参数
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.164
B. Dębski, L. Kulczycka, W. Skrobacz, J. Pęgiel, M. Jacak
{"title":"First determination of the system parameters in five contact binaries","authors":"B. Dębski, L. Kulczycka, W. Skrobacz, J. Pęgiel, M. Jacak","doi":"10.31577/caosp.2024.54.2.164","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.164","url":null,"abstract":". We present solutions of the BVRI-light curve numerical modeling for five low-mass ratio totally eclipsing contact binary stars. One object required the introduction of a cool star spot to the best-fitting model. Only one object returned a solution with a hotter secondary component. None of the objects required the introduction of a third component.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"112 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467735","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
Discovery of star systems at the merger limit by large astronomical surveys 通过大型天文巡天发现处于合并极限的恒星系统
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.249
P. Christopoulou, E. Lalounta, A. Papageorgiou, C. E. Ferreira Lopes, M. Catelan, A.J. Drake
{"title":"Discovery of star systems at the merger limit by large astronomical surveys","authors":"P. Christopoulou, E. Lalounta, A. Papageorgiou, C. E. Ferreira Lopes, M. Catelan, A.J. Drake","doi":"10.31577/caosp.2024.54.2.249","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.249","url":null,"abstract":". This study presents the identification and the best photometric so-lution of 92 low mass ratio (LMR) totally eclipsing contact binaries in Catalina Sky Survey data, among which 37 are new discoveries, six are candidates for mergers, and a unique ultra-short period LMR","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"34 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464858","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
V1006 Cyg: SU UMa-type dwarf nova in the period gap that wobbles between subclasses V1006 Cyg：在亚类之间摇摆的周期间隙中的 SU UMa 型矮新星
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.117
E. Pavlenko, S. Shugarov, T. Kato, O. Antonyuk, A. Sosnovskij, Ju. Babina, A. Shchurova, K. Isogai, A. Sklyanov, A. Gutaev, R. Zhuchkov, P. Dubovský, K. Petrik, J. Hambsch
{"title":"V1006 Cyg: SU UMa-type dwarf nova in the period gap that wobbles between subclasses","authors":"E. Pavlenko, S. Shugarov, T. Kato, O. Antonyuk, A. Sosnovskij, Ju. Babina, A. Shchurova, K. Isogai, A. Sklyanov, A. Gutaev, R. Zhuchkov, P. Dubovský, K. Petrik, J. Hambsch","doi":"10.31577/caosp.2024.54.2.117","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.117","url":null,"abstract":",","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"45 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464418","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
Low-mass contact binaries as probes of stellar merging events 作为恒星合并事件探测器的低质量接触双星
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.58
K. Gazeas
{"title":"Low-mass contact binaries as probes of stellar merging events","authors":"K. Gazeas","doi":"10.31577/caosp.2024.54.2.58","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.58","url":null,"abstract":". Gravitational interaction is important for nearly every aspect of Astrophysics. Theoretical models are tough tested in cases where strong, stellar winds, angular momentum loss, and mass transfer take place in the course of stellar evolution within a common envelope. Stellar interaction impacts the formation and evolution of diverse types of binary and multiple stellar systems. Therefore, evolution in a binary (and a multiple) stellar environment is still an open question in Astrophysics while contact binaries are challenging the well-established and solid theories that concern thermal equilibrium and orbital stability. There is a vast number of such systems observed in the Milky Way and the Magellanic Clouds. Systematic (independent or combined) observations, all-sky surveys, ground-based and space telescopes have offered very detailed photometric and spectroscopic information about these systems. Special attention is given when extreme cases are observed, such as ultra-short orbital period contact binaries or extremely low mass ratio systems. These cases can give insights into the physical and orbital parameters of low-mass contact binaries and their temporal variations. For example, one can investigate the orbital period modulation, the spot activity, and the possibility of contact bi-naries to host planets, as well as predict a stellar merger, red nova events, and a possible connection with exotic stellar populations such as blue stragglers. The purpose of this work is to present the recent developments in observations of low-mass contact binaries, highlighting the most important findings, in combination with existing theories. The research of such systems, at an international level, is constantly challenging our current knowledge of stellar interactions and advances our understanding of stellar dynamics in common envelope and contact phases.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"977 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140467603","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
Eclipse timing variations of evolved eclipsing binaries: potential targets for meter-sized telescopes in the light of TESS observations 演化蚀日双星的蚀时变化：根据 TESS 观测结果，米级望远镜的潜在目标
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.228
E. M. Esmer, ¨O. Ba¸st¨urk, S. O. Selam, F. Akar, E. Sertkan, B. G¨uler, S. Yal¸cınkaya
{"title":"Eclipse timing variations of evolved eclipsing binaries: potential targets for meter-sized telescopes in the light of TESS observations","authors":"E. M. Esmer, ¨O. Ba¸st¨urk, S. O. Selam, F. Akar, E. Sertkan, B. G¨uler, S. Yal¸cınkaya","doi":"10.31577/caosp.2024.54.2.228","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.228","url":null,"abstract":". Evolved eclipsing binaries, featuring a white dwarf or a subdwarf companion on relatively short orbital periods of a few hours, exhibit interesting characteristics in their eclipse timing variations (ETV), analysis of which brings several advantages. Firstly, their small total masses enable us to detect substel-lar mass objects by observing the light-time effect, due to a subtle wobbling of the binary system around the barycenter. Additionally, the short orbital periods of these binaries allow for the accumulation of a large dataset comprising numerous observations, facilitating rigorous analysis and enhancing statistical significance. Moreover, their minima profiles have symmetric V-shapes in most cases, which decrease the uncertainties in the measurements of minima timings. In this study, we collect and analyze all available photometric data from the Transiting Exoplanet Survey Satellite (TESS), using observation cadences of both 20 and 120 seconds for such systems identified by various surveys. Our sample includes more than 60 evolved eclipsing binaries, whose primaries are either white dwarf or subdwarf companions. By calculating mid-eclipse timings, we construct detailed ETV diagrams and apply the Lomb-Scargle period analysis to determine the amplitudes and periods of their ETVs.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"788 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469447","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
Spotted eclipsing binary KIC 7023917 with δ-Scuti pulsations 具有δ-Scuti脉冲的点蚀双星KIC 7023917
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.194
Pavol Gajdoš, Š. Parimucha, M. Kamenec
{"title":"Spotted eclipsing binary KIC 7023917 with δ-Scuti pulsations","authors":"Pavol Gajdoš, Š. Parimucha, M. Kamenec","doi":"10.31577/caosp.2024.54.2.194","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.194","url":null,"abstract":". Eclipsing binary KIC 7023917 is one of nearly three thousand other binaries in the well-known Kepler Eclipsing Binary Catalog. However, it has some uncommon features. We focused on this system because we detected fast anti-correlated changes on the O-C diagram which could suggest the presence of apsidal motion. However, these changes are very fast for apsidal motion and the orbit of this binary is circular. Detailed analysis of the Kepler and TESS light curves reveals deformation of the light curve by short-periodic pulsations and the O’Connell effect caused by stellar spot(s). Here, we present our initial study of this system and a possible explanation of the observed O-C diagram.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"16 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140463552","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
Spectroscopic characterization of superflares on solar-type stars -- a joint observing campaign 太阳型恒星超耀斑的光谱特征--联合观测活动
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.190
M. Leitzinger, P. Kabáth, M. Vaňko, T. Pribulla, R. Komžík, Z. Garai, R. Karjalainen, P. Odert, J. Lipták, P. Heinzel, J. Wollmann, R. Greimel, E.W. Guenther
{"title":"Spectroscopic characterization of superflares on solar-type stars -- a joint observing campaign","authors":"M. Leitzinger, P. Kabáth, M. Vaňko, T. Pribulla, R. Komžík, Z. Garai, R. Karjalainen, P. Odert, J. Lipták, P. Heinzel, J. Wollmann, R. Greimel, E.W. Guenther","doi":"10.31577/caosp.2024.54.2.190","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.190","url":null,"abstract":". During the last decade numerous superflares have been detected on solar-type stars using broadband photometry from the Kepler and TESS satellites. Still the spectroscopic exploration of this high-energy phenomenon is lacking. This exploration would","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"50 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464267","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
Nova Herculi 2021 as an intermediate polar 海尔库利新星 2021 作为中间极地
Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI: 10.31577/caosp.2024.54.2.128
P. Dubovský, K. Petrík, V. Breus
{"title":"Nova Herculi 2021 as an intermediate polar","authors":"P. Dubovský, K. Petrík, V. Breus","doi":"10.31577/caosp.2024.54.2.128","DOIUrl":"https://doi.org/10.31577/caosp.2024.54.2.128","url":null,"abstract":". We report the results of observations of Nova Herculi 2021 - V1674 Her. The object is characterized by several exceptional properties. The progenitor was identified as an intermediate polar. The speed of the outflow reached 10000 km s − 1 . The brightness decline was exceptionally rapid: t 2 ∼ = 1 . 2 d , t 3 ∼ = 3 d . The pulse spin signal was detected in photometry soon after the nova eruption. Extremely fast spin-up of the white dwarf rotation was measured. Despite challenges in cycle counting, we successfully constructed the O - C diagram of spin pulse maxima based on three seasons of observations. The result suggests a stable spin acceleration, with an anticipated gradual decline over the next decades. Additionally, we investigated the evolution of the orbital period.","PeriodicalId":515045,"journal":{"name":"Contributions of the Astronomical Observatory Skalnaté Pleso","volume":"33 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140464882","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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