Absolute parameters of young stars:PU Pup

作     者：Ahmet Erdem Derya Surgit Timothy S.Banks Burcu Ozkardes Edwin Budding Ahmet Erdem;Derya Sürgit;Timothy S.Banks;Burcu ?zkarde?;Edwin Budding

作者机构：Canakkale Onsekiz Mart UniversityAstrophysics Research Center and Ulupinar ObservatoryTR-17100CanakkaleTurkey Department of PhysicsFaculty of Arts and SciencesCanakkale Onsekiz Mart UniversityTerzioglu KampusuTR-17100CanakkaleTurkey Department of Space Sciences and TechnologiesFaculty of Arts and SciencesCanakkale Onsekiz Mart UniversityTerzioglu KampusuTR-17100CanakkaleTurkey Data ScienceNielsen200 W JacksonChicagoIL 60606USA Physics&AstronomyHarper College1200 W Algonquin RdPalatineIL 60067USA Visiting astronomerMt.John ObservatoryUniversity of CanterburyPrivate Bag 4800Christchurch 8140NZ Carter ObservatoryWellington 6012New Zealand School of Chemical&Physical SciencesVictoria University of WellingtonWellington 6012New Zealand Variable Stars SouthRASNZPO Box 3181WellingtonNew Zealand 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第10期

页      面：151-163页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：provided by the NASA Explorer Program 

主　　题：(stars:)binaries(including multiple):close stars:early-type stars:individual(PU Pup) Galaxy:stellar content 

摘      要：We present combined photometric and spectroscopic analyses of the southern binary star PU ***-resolution spectra of this system were taken at the University of Canterbury *** Observatory in the years 2008 and again in *** find the light contribution of the secondary component to be only 2%of the total light of the system in optical wavelengths,resulting in a single-lined spectroscopic *** TESS data revealed grazing eclipses within the light minima,though the tidal distortion,examined also from Hipparcos data,remains the predominating light curve *** model shows PU Pup to have the more massive primary relatively close to filling its Roche *** Pup is thus approaching the rare‘fast phase’of interactive(Case B)*** adopted absolute parameters are as follows:M_(1)=4.10(±0.20)M_(⊙),M_(2)=0.65(±0.05)M_(⊙),R_(1)=6.60(±0.30)R_(⊙),R_(2)=0.90(±0.10)R_(⊙);T_(1)=11500(±500)K,T_(2)=5000(±350)K;photometric distance=186(±20)pc,age=170(±20)*** less-massive secondary component is found to be significantly oversized and overluminous compared to standard main sequence *** discuss this discrepancy referring to heating from the reflection effect.