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BVRI photometric observations,light curve solutions and orbital period analysis of BF Pav

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Research in Astronomy and Astrophysics 2021年第8期21卷 193-202页

作者： Atila Poro Fahri Alicavus Eduardo Fernández-Lajús Fatemeh Davoudi PegahSadat MirshafieKhozani mark g.blackford Edwin Budding Behjat Zarei Jalalabadi Jabar Rahimi Farzaneh Ahangarani Farahani The International Occultation Timing Association Middle East section Iran Astronomy Department of the Raderon Lab BurnabyBCCanada Canakkale Onsekiz Mart University Faculty of Arts and SciencesDepartment of Physics17020CanakkaleTurkey Canakkale Onsekiz Mart University Astrophysics Research Center and Ulupnar Observatory17020CanakkaleTurkey Instituto de Astrofisica de La Plata(CCT La Plata-CONICET-UNLP) La PlataArgentina Facultad de Ciencias Astronomicas y geofisicas Universidad Nacional de La PlataPaseo del BosqueB1900FWALa PlataArgentina Variable Stars South(VSS) Congarinni ObservatoryCongarinniNSW2447Australia Carter Observatory 40 Salamanca RdKelburnWellington 6012New Zealand

A new ephemeris,period change analysis and light curve modeling of the W UMa-type eclipsing binary BF Pav are presented in this *** curves of the system taken in BVRI filters from two observatories,in Australia and Argentina,were modeled using the Wilson-Devinney *** results of this analysis demonstrate that BF Pav is a contact binary system with a photometric mass ratio q=1.460 ± 0.014,a fillout factor f=12.5%,an inclination of 87.97 ± 0.45 deg and a cold spot on the secondary *** applying the distance modulus formula,the distance of BF Pav was calculated to be d=268 ± 18 pc which is in good agreement with the gaia EDR3 *** obtain an orbital period increase at a rate of 0.142 s century-1 due to a quadratic trend in the O-C ***,an alternative sudden period jump probably occurred which could be interpreted as a rapid mass transfer from the lower mass star to its companion of about ΔM=2.45 × 10-6 M⊙.Furthermore,there is an oscillatory behavior with a period of 18.3±0.3 *** BF Pav does not seem to have significant magnetic activity,this behavior could be interpreted as the light-time effect caused by an undetected third body in this *** this case,the probability for the third body to be a low mass star with M≥ 0.075 M⊙or a brown dwarf is 5.4% and 94.6% *** we assume i’=90°,a3=8.04±0.33 *** mass of the secondary component was also determined following two different methods which result close to each other.

关键词： techniques:photometric binaries:eclipsing stars:individual(BF Pav)

The First Photometric Study of AH Mic Contact Binary System

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Research in Astronomy and Astrophysics 2022年第5期22卷 182-189页

作者： Atila Poro M.g.blackford S.Ranjbar Salehian E.Jahangiri M.Samiei Dastjerdi M.gozarandi R.Karimi T.Madayen E.Bakhshi F.Hedayati Astronomy Department of the Raderon Lab. BCBumabyCanada Variable Stars South(VSS) Congarinni ObservatoryCongarinniNSW2447Australia Binary Systems of South and North(BSN)Project Contact Systems DepartmentIran Department of Physics Kharazmi UniversityTehranIran Astronomy and Astrophysics Department University of TorontoTorontoCanada Department of Physics Institute for Advanced Studies in Basic Sciences(IASBS)ZanjanIran

The first multi-color light curve analysis of the AH Mic binary system is *** system has very few past observations from the southern *** extracted the minima times from the light curves based on the markov Chain Monte Carlo(MCMC)approach and obtained a new *** provide modern photometric light curve solutions,we used the Physics of Eclipsing Binaries(PHOEBE)software package and the MCMC *** curve solutions yielded a system temperature ratio of 0.950,and we assumed a cold starspot for the hotter star based on the O’Connell *** analysis reveals that AH Mic is a W-subtype W UMa contact system with a fill-out factor of 21.3%and a mass ratio of *** absolute physical parameters of the components are estimated by using the gaia Early Data Release 3(EDR3)parallax method to be M_(h)(M_(⊙))=0.702(26),M_(c)(M_(⊙))=1.629(104),R_(h)(R_(⊙))=0.852(21),R_(c)(R_(⊙))=1.240(28),L_(h)(L_(⊙))=0.618(3)and L_(c)(L_(⊙))=1.067(7).The orbital angular momentum of the AH Mic binary system was found to be 51.866(35).The components’positions of this system are plotted in the Hertzsprung-Russell diagram.

关键词： photometry-binary stars-individual (AH Mic)

Recent developments and some open problems in Finsler geometry

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Chinese Science Bulletin 2001年第13期46卷 1059-1061页

作者： MO Xiaohuan & SHEN Zhongmin1. School of Mathematical Sciences, Peking University, Beijing 100871, China 2. Department of Mathematics, IUPUI 402 N. blackford Street, Indianapolis, IN 46202-3216, USA School of Mathematical Sciences Peking University Beijing China Department of Mathematics IUPUI Indianapolis USA

Finsler geometry is just Riemannian geometry without the quadratic restriction. Recent studies on Finsler geometry have taken on a new look. In this article, we will briefly discuss recent developments and some open p... 详细信息

关键词： Finsler geometry open problems recent development.

On a class of weak Landsberg metrics

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Science China Mathematics 2007年第4期50卷 573-589页

作者： Ben-ling LI & Zhong-min SHEN Department of Mathematics, Zhejiang University, Hangzhou 310028, China Department of Mathematical Sciences, Indiana University Purdue University Indianapolis (IUPUI), 402 N. blackford Street, Indianapolis, IN 46202-3216, USA Center of Mathematical Sciences, Zhejiang University, Hangzhou 310027, China 1. Department of Mathematics Zhejiang University Hangzhou 310028 China 2. Department of Mathematical Sciences Indiana University Purdue University Indianapolis (IUPUI) 402 N. Blackford Street Indianapolis IN 46202-3216 USA 3. Center of Mathematical Sciences Zhejiang University Hangzhou 310027 China

In this paper, we discuss a class of Finsler metrics defined by a Riemannian metric and a 1-form on a manifold. We characterize weak Landsberg metrics in this class and show that there exist weak Landsberg metrics whi... 详细信息

关键词： Finsler metric weak Landsberg metric (α,β)-metric 53B40

The Case Against Cloning

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考试与评价（英语高二专刊） 2018年第4期 19-19页

作者： Rssell blackford

Nonlinear Interferometer for Precision Measurement

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Nonlinear Interferometer for Precision Measurement

Entanglement enhanced phase sensitive Raman scattering in atomicvapors

第十五届全国量子光学学术报告会

作者： Ou Zhe Yu (Department of Physics,Indiana University-Purdue University Indianapolis,402 N.blackford Street,Indianapolis,IN 46202,USA)

＜正＞By using nonlinear elements as beamsplitters,we form a nonlinear interferometer where the fringe size depends nonlinearly on the phasing *** an interferometer can increase the signal while maintain the noise lev...

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Entanglement enhanced phase sensitive Raman scattering in at...

Creation of entanglement of collective atomic spin excitation among independent atomic ensembles by photon indistinguishability

第十五届全国量子光学学术报告会

作者： Chun-Hua Yuan 1,,L.Q.Chen 1,Z.Y.Ou 1,2,and Weiping Zhang 1 (1.Quantum Institute for Light and Atoms,Department of Physics,EastChina Normal University,Shanghai 200062,P.R.China,2.Department of Physics,Indiana University-Purdue UniversityIndianapolis,402 North blackford Street,Indianapolis,Indiana 46202,USA)

＜正＞We theoretically present a new method to enhance Raman scattering by injecting seeded light field that is entangled with the initially preparedatomic spin *** numerical calculation,we find that strong

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Creation of entanglement of collective atomic spin excitatio...

REVIEW OF PARTICLE PHYSICS

第十五届全国量子光学学术报告会

作者： guowan Zhang 1,Chenglin Bian 1,L.Q.Chen 1,Z.Y.Ou 1,2,,Weiping Zhang 1 (1.Department of Physics,East China Normal University,Shanghai 200062,P.R.China 2.Department of Physics,Indiana University-Purdue University Indianapolis,402 N.blackford Street,Indianapolis,IN 46202,USA)

＜正＞Over the past decade,there have been many proposals and experimental realizations of practical quantum information protocols involving atomic ensembles as information nodes for information storage and *** basic ...

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Chinese Physics C 2014年第9期38卷 1-4页

作者： K.A.Olive K.Agashe C.Amsler M.Antonelli J.-F.Arguin D.M.Asner H.Baer H.R.Band R.M.Barnett T.Basaglia C.W.Bauer J.J.Beatty V.I.Belousov J.Beringer g.Bernardi S.Bethke H.Bichsel O.Biebe E.Blucher S.Blusk g.Brooijmans O.Buchmueller V.Burkert M.A.Bychkov R.N.Cahn M.Carena A.Ceccucci A.Cerr D.Chakraborty M.-C.Chen R.S.Chivukula K.Copic g.Cowan O.Dahl g.D'Ambrosio T.Damour D.de Florian A.de gouvea T.Degrand P.de Jong g.Dissertor B.A.Dobrescu M.Doser M.Drees H.K.Dreiner D.A.Edwards S.Eidelman J.Erler V.V.Ezhela W.Fetscher B.D.Fields B.Foster A.Freitas T.K.gaisser H.gallagher L.garren H.-J.gerber g.gerbier T.gershon T.gherghetta S.golwala M.goodman C.grab A.V.gritsan C.grojean D.E.groom M.grnewald A.gurtu T.gutsche H.E.Haber K.Hagiwara C.Hanhart S.Hashimoto Y.Hayato K.g.Hayes M.Heffner B.Heltsley J.J.Hernandez-Rey K.Hikasa A.Hocker J.Holder A.Holtkamp J.Huston J.D.Jackson K.F.Johnson T.Junk M.Kado D.Karlen U.F.Katz S.R.Klein E.Klempt R.V.Kowalewski F.Krauss M.Kreps B.Krusche Yu.V.Kuyanov Y.Kwon O.Lahav J.Laiho P.Langacker A.Liddle Z.Ligeti C.-J.Lin T.M.Liss L.Littenberg K.S.Lugovsky S.B.Lugovsky F.Maltoni T.Mannel A.V.Manohar W.J.Marciano A.D.Martin A.Masoni J.Matthews D.Milstead P.Molaro K.Monig F.Moortgat M.J.Mortonson H.Murayama K.Nakamura M.Narain P.Nason S.Navas M.Neubert P.Nevski Y.Nir L.Pape J.Parsons C.Patrignani J.A.Peacock M.Pennington S.T.Petcov Kavli IPMU A.Piepke A.Pomarol A.Quadt S.Raby J.Rademacker g.Raffel B.N.Ratcliff P.Richardson A.Ringwald S.Roesler S.Rolli A.Romaniouk L.J.Rosenberg J L.Rosner g.Rybka C.T.Sachrajda Y.Sakai g.P.Salam S.Sarkar F.Sauli O.Schneider K.Scholberg D.Scott V.Sharma S.R.Sharpe M.Silari T.Sjostrand P.Skands J.g.Smith g.F.Smoot S.Spanier H.Spieler C.Spiering A.Stahl T.Stanev S.L.Stone T.Sumiyoshi M.J.Syphers F.Takahashi M.Tanabashi J.Terning L.Tiator M.Titov N.P.Tkachenko N.A.Tornqvist D.Tovey g.Valencia g.Venanzoni M.g.Vincter P.Vogel A.Vogt S.P.Wakely W.Walkowiak C.W.Walter D.R.Ward g.Weiglein D.H.Weinberg E.J.Weinberg M.White L.R.Wiencke C.g.Wohl L.Wolfenstein J.Womersley C.L. University of Minnesota School of Physics and Astronomy116 Church St.S.E.MinneapolisMN 55455USA University of Maryland Department of PhysicsCollege ParkMD 20742-4111USA Albert Einstein Center for Fundamental Physics Universitat BernCH-3012 BernSwitzerland Lab.Nazionali di Frascati dell'INFN CP 13via E.Fermi40I-00044 Frascati(Roma)Italy Departement de physique Universite de MontrealC.P.6128succ.centre-villeMontreal(Quebec) H3C 3J7Canada Pacific Northwest National Laboratory 902 Battelle BoulevardRichlandWA 99352USA Department of Physics and Astronomy University of OklahomaNormanOK 73019USA Department of Physics University of WisconsinMadisonWI 53706USA Physics Division Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCA 94720USA CERN European Organization for Nuclear ResearchCH-1211 Geneve 23Switzerland Department of Physics The Ohio State University191 W.Woodruff Ave.ColumbusOH 43210 COMPAS group Institute for High Energy PhysicsRU- 142284ProtvinoRussia LPNHE IN2P3-CNRS et Universites de Paris 6 et 7F-75252 ParisFrance Max-Planck-Institute of Physics 80805 MunichGermany Department of Physics University of WashingtonSeattleWA 98195USA Ludwig-Maximilians-Universitat Fakultdt für PhysikSchellingstr.4D-80799 MünchenGermany Enrico Fermi Institute and Department of Physics University of ChicagoChicagoIL 60637-1433USA Department of Physics Syracuse UniversitySyracuseNY13244USA Department of Physics Columbia University538 W.120th StreetNew YorkNY10027 USA High Energy Physics group Blackett LaboratoryImperial CollegePrince Consort RoadLondon SW7 2AZUK Jefferson Lab 12000 Jefferson Ave.Newport NewsVA 23606USA Department of Physics University of VirginiaPO Box 400714CharlottesvilleVA 22904USA Fermi National Accelerator Laboratory P.O.Box 500BataviaIL 60510USA Kavli Institute for Cosmological Physics University of ChicagoChicagoIL 60637-1433USA Department of Physics and Astronomy University of SussexFalmerBrighton BN1 9QHUK Department o

The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,283 new measurements from 899 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as heavy neutrinos, supersymmetric and technicolor particles, axions, dark photons, etc. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as Supersymmetry, Extra Dimensions, Particle Detectors, Probability, and Statistics. Among the 112 reviews are many that are new or heavily revised including those on： Dark Energy, Higgs Boson Physics, Electroweak Model, Neutrino Cross Section Measurements, Monte Carlo Neutrino generators, Top Quark, Dark Matter, Dynamical Electroweak Symmetry Breaking, Accelerator Physics of Colliders, High-Energy Collider Parameters, Big Bang Nucleosynthesis, Astrophysical Constants and Cosmological Parameters. A booklet is available containing the Summary Tables and abbreviated versions of some of the other sections of this full Review. All tables, listings, and reviews （and errata） are also available on the Particle Data group website： http ：//pdg. lbl. gov.

关键词： REVIEW OF PARTICLE PHYSICS