Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy

@inproceedings{Kashiwagi2021SubaruFOCASIR,
  title={Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy},
  author={Yurie Kashiwagi and Akio K. Inoue and Yuki Isobe and Kimihiko Nakajima and Masami Ouchi and Shinobu Ozaki and Seiji Fujiimoto and Yoshiaki Ono and Takashi Kojima},
  year={2021}
}
We present the first measurement of the metallicity gradient in extremely metal-poor galaxies (EMPGs). With Subaru/Faint Object Camera And Spectrograph (FOCAS) Integral Field Unit (IFU), we have observed a nearby, low-mass EMPG, HSC J1631+4426, whose oxygen abundance and stellar mass are known to be 12+log(O/H) = 6.9 and log10(M∗/M ) = 5.8, respectively. The measured metallicity gradient is −0.36± 0.04 dex kpc−1 corresponding to −0.049± 0.006 dex R−1 e for the continuum effective radius of Re… 

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