NAOC Open IR
A New Transition Wolf-Rayet WN/C Star in the Milky Way
Zhang, Wei1; Todt, Helge2; Wu, Hong1; Shi, Jianrong1; Hsia, Chih-Hao3; Wu, Yuzhong1; Wu, Chaojian1; Zhao, Yongheng1; Zhang, Tianmeng1; Hou, Yonghui4,5
2020-10-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume902Issue:1Pages:8
AbstractWe report the discovery of a new transition type Wolf-Rayet (W-R) WN/C star in the Galaxy. According to its coordinates (R.A., decl.)(J2000 )= 18(h)51(m)39(s).7, -05 degrees 34'51 ''.1, and the distance 7.11(-122)(+1.56) kpc away from Earth) inferred from the second Gaia data release, it is found that W-R 121-16 is located in the Far 3 kpc Arm, and it is 3.75 kpc away from the Galactic Center. The optical spectra obtained by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope and the 2.16 m telescope, both located at the Xinglong Observatory in China, indicate that this is a W-R star of the transitional WN7o/WC subtype. A current stellar mass of about 7.1(-1.1)(+1.7) M-circle dot a mass-loss rate of (M) over dot = 10(-4.97-0.20+0.16) M-circle dot yr(-1), a bolometric luminosity of log L/L-circle dot = 4.88(-0.15)(+0.17), and a stellar temperature of T-* = 47(-5)(+9) kK are derived by fitting the observed spectrum with a specific Potsdam W-R model. The magnitude in V-band varies between 13.95 and 14.14 mag, while no period is found. Based on the optical spectra, the time domain data, and the indices of the astrometric solution of the Gaia data, W-R 121-16 is likely a transitional WN/C single star rather than a WN+WC binary.
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
DOI10.3847/1538-4357/abb0e7
WOS KeywordWR STARS ; MODEL ATMOSPHERES ; SPECTRAL-ANALYSIS ; INFRARED-SPECTRA ; K-CORRECTIONS ; CLASSIFICATION ; CATALOG ; GALAXY ; WC ; POPULATION
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[U1531118] ; National Natural Science Foundation of China (NSFC)[U1931109] ; Chinese Academy of Sciences (CAS)[U1531118] ; Chinese Academy of Sciences (CAS)[U1931109] ; NSFC[11733006] ; NSFC[12073051] ; National Key R&D Program of China[2017YFA0402704] ; Guangxi Natural Science Foundation[2019GXNSFFA245008] ; Science and Technology Development Fund, MacauSAR[0007/2019/A] ; Faculty Research Grants of the Macau University of Science and Technology[FRG-19-004-SSI] ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; Science and Technology Development Fund, MacauSAR ; Science and Technology Development Fund, MacauSAR ; Faculty Research Grants of the Macau University of Science and Technology ; Faculty Research Grants of the Macau University of Science and Technology ; National Development and Reform Commission ; National Development and Reform Commission ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000577020600001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81791
Collection中国科学院国家天文台
Corresponding AuthorZhang, Wei
Affiliation1.Chinese Acad Sci, CAS Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China
2.Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany
3.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Taipa, Macau, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Wei,Todt, Helge,Wu, Hong,et al. A New Transition Wolf-Rayet WN/C Star in the Milky Way[J]. ASTROPHYSICAL JOURNAL,2020,902(1):8.
APA Zhang, Wei.,Todt, Helge.,Wu, Hong.,Shi, Jianrong.,Hsia, Chih-Hao.,...&Hou, Yonghui.(2020).A New Transition Wolf-Rayet WN/C Star in the Milky Way.ASTROPHYSICAL JOURNAL,902(1),8.
MLA Zhang, Wei,et al."A New Transition Wolf-Rayet WN/C Star in the Milky Way".ASTROPHYSICAL JOURNAL 902.1(2020):8.
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