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Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: The Age Dependency of the Distance Scale
Chen, Y. Q.1,2,3; Casagrande, L.4; Zhao, G.1,2; Bovy, J.3; Aguirre, V. Silva5; Zhao, J. K.1; Jia, Y. P.1,2
2017-05-10
Source PublicationASTROPHYSICAL JOURNAL
Volume840Issue:2
AbstractRed clump stars are fundamental distance indicators in astrophysics, although theoretical stellar models predict a dependence of absolute magnitudes with age. This effect is particularly strong below similar to 2 Gyr, but even above this limit a mild age dependence is still expected. We use seismically identified red clump stars in the Kepler field for which we have reliable distances, masses, and ages from the SAGA survey, to first explore this effect. By excluding red clump stars with masses larger than 1.6 M circle dot (corresponding to ages younger than 2 Gyr), we derive robust calibrations linking intrinsic colors to absolute magnitudes in the following photometric systems: Stromgren by, Johnson BV, Sloan griz, 2MASS JHK(s), and WISE W1W2W3. With the precision achieved we also detect a slope of absolute magnitudes similar to 0.020 +/- 0.003 mag Gyr(-1) in the infrared, implying that distance calibrations of clump stars can be off by up to similar to 0.2 mag in the infrared (over the range from 2 to 12 Gyr) if their ages are unknown. Even larger uncertainties affect optical bands, because of the stronger interdependency of absolute magnitudes on colors and age. Our distance calibrations are ultimately based on asteroseismology, and we show how the distance scale can be used to test the accuracy of seismic scaling relations. Within the uncertainties our calibrations are in agreement with those built upon local red clumps with Hipparcos parallaxes, although we find a tension, which, if confirmed, would imply that scaling relations overestimate the radii of red clump stars by 2 +/- 2%. Data releases post Gaia DR1 will provide an important testbed for our results.
SubtypeArticle
KeywordAsteroseismology Stars: Fundamental Parameters Stars: Distances Stars: Late-type Surveys
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China(11625313 ; National Natural Science Foundation of China(11625313 ; National Scholarship Council Fund(CSC201604910337) ; National Scholarship Council Fund(CSC201604910337) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; Australian Research Council(DP150100250 ; Australian Research Council(DP150100250 ; Danish National Research Foundation(DNRF106) ; Danish National Research Foundation(DNRF106) ; VILLUM FONDEN(10118) ; VILLUM FONDEN(10118) ; 11573035 ; 11573035 ; FT160100402) ; FT160100402) ; 11233004 ; 11233004 ; 11390371 ; 11390371 ; 11052037) ; 11052037) ; National Natural Science Foundation of China(11625313 ; National Natural Science Foundation of China(11625313 ; National Scholarship Council Fund(CSC201604910337) ; National Scholarship Council Fund(CSC201604910337) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; Australian Research Council(DP150100250 ; Australian Research Council(DP150100250 ; Danish National Research Foundation(DNRF106) ; Danish National Research Foundation(DNRF106) ; VILLUM FONDEN(10118) ; VILLUM FONDEN(10118) ; 11573035 ; 11573035 ; FT160100402) ; FT160100402) ; 11233004 ; 11233004 ; 11390371 ; 11390371 ; 11052037) ; 11052037)
DOI10.3847/1538-4357/aa6d0f
WOS KeywordK-BAND MAGNITUDE ; GIANT STARS ; GALACTIC ARCHAEOLOGY ; STELLAR POPULATIONS ; ECLIPSING BINARIES ; INPUT CATALOG ; CHARA ARRAY ; ASTEROSEISMOLOGY ; CALIBRATION ; CLUSTERS
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(11625313 ; National Natural Science Foundation of China(11625313 ; National Scholarship Council Fund(CSC201604910337) ; National Scholarship Council Fund(CSC201604910337) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; Australian Research Council(DP150100250 ; Australian Research Council(DP150100250 ; Danish National Research Foundation(DNRF106) ; Danish National Research Foundation(DNRF106) ; VILLUM FONDEN(10118) ; VILLUM FONDEN(10118) ; 11573035 ; 11573035 ; FT160100402) ; FT160100402) ; 11233004 ; 11233004 ; 11390371 ; 11390371 ; 11052037) ; 11052037) ; National Natural Science Foundation of China(11625313 ; National Natural Science Foundation of China(11625313 ; National Scholarship Council Fund(CSC201604910337) ; National Scholarship Council Fund(CSC201604910337) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; National Key Basic Research Program of China (973 program)(2014CB845703) ; Australian Research Council(DP150100250 ; Australian Research Council(DP150100250 ; Danish National Research Foundation(DNRF106) ; Danish National Research Foundation(DNRF106) ; VILLUM FONDEN(10118) ; VILLUM FONDEN(10118) ; 11573035 ; 11573035 ; FT160100402) ; FT160100402) ; 11233004 ; 11233004 ; 11390371 ; 11390371 ; 11052037) ; 11052037)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000403228100006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8830
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, A20 Datun Rd, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
3.Univ Toronto, Dept Astron & Astrophys, 50 St George St, Toronto, ON, Canada
4.Australian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
5.Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
Recommended Citation
GB/T 7714
Chen, Y. Q.,Casagrande, L.,Zhao, G.,et al. Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: The Age Dependency of the Distance Scale[J]. ASTROPHYSICAL JOURNAL,2017,840(2).
APA Chen, Y. Q..,Casagrande, L..,Zhao, G..,Bovy, J..,Aguirre, V. Silva.,...&Jia, Y. P..(2017).Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: The Age Dependency of the Distance Scale.ASTROPHYSICAL JOURNAL,840(2).
MLA Chen, Y. Q.,et al."Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: The Age Dependency of the Distance Scale".ASTROPHYSICAL JOURNAL 840.2(2017).
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