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Information Bulletin on Variable Stars最新文献

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TYC 5353-1137-1: an enigmatic Doubly Periodic Variable of semiregular amplitude TYC 5353-1137-1：一个神秘的半规则振幅双周期变量
Information Bulletin on Variable Stars Pub Date : 2018-10-03 DOI: 10.22444/IBVS.6248
J. Rosales, R. Mennickent
{"title":"TYC 5353-1137-1: an enigmatic Doubly Periodic Variable of semiregular amplitude","authors":"J. Rosales, R. Mennickent","doi":"10.22444/IBVS.6248","DOIUrl":"https://doi.org/10.22444/IBVS.6248","url":null,"abstract":"We have performed a new search for DPVs of short period in the ASAS catalog (Pojmanski, G., 1997), focusing on those stars with orbital periods between 2 to 3 days which also show variations in their brightness. From a total of 244 objects, we have found another candidate to DPV, one whose mean brightness is gradually decreasing. By fitting a 3rd order polynomial to the mean magnitude and then moving it to zero for a second analysis, a gradual decrease over 2500 days was revealed. During the last 1000 days of this decrease, a 42% increase in the variation between the minimum and maximum values of the magnitude was observed. We determined the orbital period by using the PDM IRAF software (Stellingwerf 1978) and estimated the errors for the orbital period and long cycle by visual inspection of the light curves phased with trial periods near the minimum of the periodogram given by PDM.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48012337","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: 2
The Status of GSC 3870-01172 as a Member of a Triple or Quadruple System GSC 3870-01172作为三重或四重系统成员的状态
Information Bulletin on Variable Stars Pub Date : 2018-10-03 DOI: 10.22444/IBVS.6247
D. Terrell, R. Nelson
{"title":"The Status of GSC 3870-01172 as a Member of a Triple or Quadruple System","authors":"D. Terrell, R. Nelson","doi":"10.22444/IBVS.6247","DOIUrl":"https://doi.org/10.22444/IBVS.6247","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47308549","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
Photometry of GS UMa: a suspected {delta} Scuti variable GS UMa的光度测定：一个可疑的｛delta｝Scuti变量
Information Bulletin on Variable Stars Pub Date : 2018-10-03 DOI: 10.22444/IBVS.6246
F. Aliçavuş, A. Raheem, G. Ç. Coban, E. M. Tambulut, Ü. Gögülter, L. Bas, B. Çevirici
{"title":"Photometry of GS UMa: a suspected {delta} Scuti variable","authors":"F. Aliçavuş, A. Raheem, G. Ç. Coban, E. M. Tambulut, Ü. Gögülter, L. Bas, B. Çevirici","doi":"10.22444/IBVS.6246","DOIUrl":"https://doi.org/10.22444/IBVS.6246","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44048701","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
SU Aur: A deep fading event in Visible and near-infrared bands 在可见光和近红外波段的深度衰落事件
Information Bulletin on Variable Stars Pub Date : 2018-09-12 DOI: 10.22444/IBVS.6253
K. Grankin, V. Shenavrin, T. Irsmambetova, P. Petrov
{"title":"SU Aur: A deep fading event in Visible and near-infrared bands","authors":"K. Grankin, V. Shenavrin, T. Irsmambetova, P. Petrov","doi":"10.22444/IBVS.6253","DOIUrl":"https://doi.org/10.22444/IBVS.6253","url":null,"abstract":"In three seasons of 2015-2018 we carried out a series of visible and near infrared (NIR) photometry of SU Aur. In course of this photometric monitoring we detected an event of a deep fading of the star in spring of 2018. In this paper we present preliminary analysis of our photometry.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48201764","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
The Period Analysis of the Hierarchical System DI Peg 层次系统DI Peg的周期分析
Information Bulletin on Variable Stars Pub Date : 2018-08-23 DOI: 10.22444/IBVS.6252
Dogus Ozuyar, A. Elmaslı, S. Caliskan
{"title":"The Period Analysis of the Hierarchical System DI Peg","authors":"Dogus Ozuyar, A. Elmaslı, S. Caliskan","doi":"10.22444/IBVS.6252","DOIUrl":"https://doi.org/10.22444/IBVS.6252","url":null,"abstract":"The existence of an additional body around a binary system can be detected by the help of the light-travel time effect. Due to the motions of binary and the companion stars around the common mass center of the ternary system, the light-time effect produces an irregularity on the eclipse timings. Monitoring the variations in these timings, sub-stellar or planet companions orbiting around the binary system can be identified. In this paper, additional bodies orbiting the Algol type binary DI Peg are examined by using the archival eclipse timings including our CCD data observed at the Ankara University Kreiken Observatory. More than five hundred minimum times equivalent to around nine decades are employed to identify the orbital behavior of the binary system. The best fit to the timings shows that the orbital period of DI Peg has variation due to an integration of two sinusoids with the periods of $P_3 = 49.50pm0.36$ yr and $P_4 = 27.40pm0.24$ yr. The orbital change is thought to be most likely due to the existence of two M-type red dwarf companions with the masses of $M_3 =0.213 pm 0.021$ M$_odot$ and $M_4 = 0.151 pm 0.008$ M$_odot$, assuming that the orbits of additional bodies are co-planar with the orbit of the binary system. Also, the residuals of two sinusoidal fits still seem to show another modulation with the period of roughly $P = 19.5$ yr. The origin of this modulation is not clear and more observational data are required to reveal if the periodicity is caused by another object gravitationally bounded to the system.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48113066","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
New transit timing observations for GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 b gj436b, hat - p - 3b, hat - p - 19b, wasp - 3b和xo - 2b的新过境时间观测
Information Bulletin on Variable Stars Pub Date : 2018-08-08 DOI: 10.22444/IBVS.6243
G. Maciejewski, M. Stangret, J. Ohlert, Ç. S. Başaran, J. Maciejczak, M. Puciata-Mroczynska, E. Boulanger
{"title":"New transit timing observations for GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 b","authors":"G. Maciejewski, M. Stangret, J. Ohlert, Ç. S. Başaran, J. Maciejczak, M. Puciata-Mroczynska, E. Boulanger","doi":"10.22444/IBVS.6243","DOIUrl":"https://doi.org/10.22444/IBVS.6243","url":null,"abstract":"We present new transit observations acquired between 2014 and 2018 for the hot exoplanets GJ 436 b, HAT-P-3 b, HAT-P-19 b, WASP-3 b, and XO-2 b. New mid-transit times extend the timespan covered by observations of these exoplanets and allow us to refine their transit ephemerides. All new transits are consistent with linear ephemerides.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44426624","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: 3
Revised coordinates of 3 variable stars in Cygnus 天鹅座3颗变星的修正坐标
Information Bulletin on Variable Stars Pub Date : 2018-08-08 DOI: 10.22444/IBVS.6242
R. Nesci
{"title":"Revised coordinates of 3 variable stars in Cygnus","authors":"R. Nesci","doi":"10.22444/IBVS.6242","DOIUrl":"https://doi.org/10.22444/IBVS.6242","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44859764","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: 1
The Period Evolution of V473 Tau V473 Tau的周期演化
Information Bulletin on Variable Stars Pub Date : 2018-07-26 DOI: 10.22444/IBVS.6245
D. Ozuyar, I. Stevens
{"title":"The Period Evolution of V473 Tau","authors":"D. Ozuyar, I. Stevens","doi":"10.22444/IBVS.6245","DOIUrl":"https://doi.org/10.22444/IBVS.6245","url":null,"abstract":"In this paper, the period evolution of the rotating chemically peculiar star V473,Tau is investigated. Even though the star has been observed for more than fifty years, for the first time four consecutive years of space-based data covering between 2007 and 2010 are presented. The data are from the {sl STEREO} satellite, and are combined with the archival results. The analysis shows that the rotation period of V473,Tau is $1.406829(10)$ days, and has slightly decreased with the variation rate of 0.11(3)~s~yr$^{-1}$ over time. Also, the acceleration timescale of the star is found to be shorter than its main sequence lifetime. This indicates that the process of decrease in period might be reversible. On this basis, it can be suggested that V473,Tau has a possible magnetic acceleration and a differential rotation, which cause a variation in the movement of inertia, and hence the observed period change. Additionally, the evolution path of V473,Tau on the H-R diagram is evaluated. Accordingly, the position of the star on the diagram suggests that its magnetic properties develop before it reaches the main sequence or in the beginning of its main sequence lifetime.","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44736250","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
2MASS J06422218-0226285 - a new Outburst Source 一个新的爆发源
Information Bulletin on Variable Stars Pub Date : 2018-07-06 DOI: 10.22444/ibvs.6240
Susanne Blex, M. Hackstein, M. Haas, S. Kimeswenger, R. Chini, K. Hodapp
{"title":"2MASS J06422218-0226285 - a new Outburst Source","authors":"Susanne Blex, M. Hackstein, M. Haas, S. Kimeswenger, R. Chini, K. Hodapp","doi":"10.22444/ibvs.6240","DOIUrl":"https://doi.org/10.22444/ibvs.6240","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46649298","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
Revised coordinates of variable stars in Cassiopeia 仙后座变星的修正坐标
Information Bulletin on Variable Stars Pub Date : 2018-07-06 DOI: 10.22444/IBVS.6236
R. Nesci
{"title":"Revised coordinates of variable stars in Cassiopeia","authors":"R. Nesci","doi":"10.22444/IBVS.6236","DOIUrl":"https://doi.org/10.22444/IBVS.6236","url":null,"abstract":"","PeriodicalId":35213,"journal":{"name":"Information Bulletin on Variable Stars","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48010245","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: 1
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