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Spectroscopic and photometric observations of unidentified ultraviolet variable objects in the GUVV-2 Catalog
Li, You1,2; Wang, Jing2; Wei, Jian-Yan2; He, Xiang-Tao1
2011-07-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume11Issue:7Pages:833-842
AbstractAn NUV-optical diagram composed from sources from the second Galaxy Evolution Explorer (GALEX) Ultraviolet Variability (GUVV-2) Catalog provides us with a method to tentatively classify the unknown GUVV-2 sources by their NUV-optical magnitudes. For the purpose of testing the correctness and generality of the method, we carry out a program on the spectroscopic observations of the unidentified GUVV-2 sources. The spectroscopic identification of these 37 sources are 19 type -A to -F stars, 10 type -G to -K stars and 7 M dwarf stars together with an AGN. We also present the light curves in the R-band for two RR Lyrae star candidates selected from the NUV-optical diagram, both of which undergo cyclic variations. Combining their light curves and colors, we classify them as RR Lyrae stars. To confirm the results, we show a color-color diagram for the 37 newly identified spectroscopic objects compared with previously identified ones, which are consistent with our previous results, indicating that the ultraviolet variable sources can initially be classified by their NUV/optical color-color diagram.
KeywordStars: Variables: General Galaxies: Active Methods: Observational Ultraviolet Emission
Indexed BySCI
Language英语
WOS IDWOS:000293037500008
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7830
Collection空间科学研究部
Affiliation1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Li, You,Wang, Jing,Wei, Jian-Yan,et al. Spectroscopic and photometric observations of unidentified ultraviolet variable objects in the GUVV-2 Catalog[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2011,11(7):833-842.
APA Li, You,Wang, Jing,Wei, Jian-Yan,&He, Xiang-Tao.(2011).Spectroscopic and photometric observations of unidentified ultraviolet variable objects in the GUVV-2 Catalog.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,11(7),833-842.
MLA Li, You,et al."Spectroscopic and photometric observations of unidentified ultraviolet variable objects in the GUVV-2 Catalog".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 11.7(2011):833-842.
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