The HⅠGas Fraction Scaling Relation of the Green Pea Galaxies  

作　　者：刘思琦 罗阿理 张伟 张彦霞 孔啸 赵永恒 Siqi Liu;A-Li Luo;Wei Zhang;Yan-Xia Zhan;Xiao Kong;Yong-Heng Zhao(CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Computer and Information Management&Institute for Astronomical Science,Dezhou University,Dezhou 253023,China)

机构地区：[1]CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]College of Computer and Information Management&Institute for Astronomical Science,Dezhou University,Dezhou 253023,China

出　　处：《Research in Astronomy and Astrophysics》2023年第6期56-64,共9页天文和天体物理学研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.12273075 and 12090041);support from the National Key R&D Program of China(No.2021YFA1600401,2021YFA1600400);the Guangxi Natural Science Foundation(No.2019GXNSFFA 245008)。

摘　　要：Green Pea galaxies are compact galaxies with high star formation rates.However,limited samples of Green Pea galaxies have H I 21 cm measurements.Whether the H I gas fraction(fH I≡MH I/M_(★))of Green Pea galaxies follows the existing scaling relations between the fH Iand NUV-r color or linear combinations of color and other physical quantities needs checking.Using archival data of H I 21 cm observations,we investigate the scaling relation of the NUV-r color with the MH I/M_(★)of 38 Green Pea galaxies,including 17 detections and 21 nondetections.The H I to stellar mass ratios(fH I)of Green Pea galaxies deviate from the polynomial form,where a higher H I gas fraction is predicted given the current NUV-r color,even with the emission lines removed.The blue sources(NUV-r<1)from the comparison sample(ALFALFA-SDSS)follow a similar trend.The H I gas fraction scaling relations with linear combination forms of-0.34(N UV-r)-0.64 log(μ_(★,z))+5.9 and-0.77 log_(μ_(★)),i+0.26logS FRM_(★)+8.53,better predict the H I gas fraction of the Green Pea galaxies.In order to obtain accurate linear combined forms,higher-resolution photometry from space-based telescopes is needed.

关 键 词：galaxies:general galaxies:dwarf galaxies:formation 

分 类 号：P15[天文地球—天文学]