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

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Standard

Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy. / Kashiwagi, Yuri; Inoue, Akio K.; Isobe, Yuki; Nakajima, Kimihiko; Ouchi, Masami; Ozaki, Shinobu; Fujimoto, Seiji; Ono, Yoshiaki; Kojima, Takashi.

In: Publications of the Astronomical Society of Japan, Vol. 73, No. 6, 01.12.2021, p. 1631-1637.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Kashiwagi, Y, Inoue, AK, Isobe, Y, Nakajima, K, Ouchi, M, Ozaki, S, Fujimoto, S, Ono, Y & Kojima, T 2021, 'Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy', Publications of the Astronomical Society of Japan, vol. 73, no. 6, pp. 1631-1637. https://doi.org/10.1093/pasj/psab100

APA

Kashiwagi, Y., Inoue, A. K., Isobe, Y., Nakajima, K., Ouchi, M., Ozaki, S., Fujimoto, S., Ono, Y., & Kojima, T. (2021). Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy. Publications of the Astronomical Society of Japan, 73(6), 1631-1637. https://doi.org/10.1093/pasj/psab100

Vancouver

Kashiwagi Y, Inoue AK, Isobe Y, Nakajima K, Ouchi M, Ozaki S et al. Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy. Publications of the Astronomical Society of Japan. 2021 Dec 1;73(6):1631-1637. https://doi.org/10.1093/pasj/psab100

Author

Kashiwagi, Yuri ; Inoue, Akio K. ; Isobe, Yuki ; Nakajima, Kimihiko ; Ouchi, Masami ; Ozaki, Shinobu ; Fujimoto, Seiji ; Ono, Yoshiaki ; Kojima, Takashi. / Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy. In: Publications of the Astronomical Society of Japan. 2021 ; Vol. 73, No. 6. pp. 1631-1637.

Bibtex

@article{dcc445cf704346b8810226b73a2dadda,
title = "Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy",
abstract = "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 log(10)(M-*/M-circle dot) = 5.8, respectively. The measured metallicity gradient is -0.36 +/- 0.04 dex kpc(-1) corresponding to -0.049 +/- 0.006 dex R-e(-1) for the continuum effective radius of R-e = 0.14 kpc. Our observation has successfully demonstrated that three-dimensional spectroscopy with 8 m-class telescopes is powerful enough to reveal the metallicity distribution in local EMPGs, providing precious information on the baryon cycle in local analogs of primordial galaxies in the early Universe.",
keywords = "galaxies: abundances, galaxies: dwarf, galaxies: evolution, galaxies: individual (HSC J1631+4426), galaxies: ISM, ABUNDANCE GRADIENTS, MASS-METALLICITY, DWARF GALAXIES, GAS, DISCOVERY, EVOLUTION",
author = "Yuri Kashiwagi and Inoue, {Akio K.} and Yuki Isobe and Kimihiko Nakajima and Masami Ouchi and Shinobu Ozaki and Seiji Fujimoto and Yoshiaki Ono and Takashi Kojima",
year = "2021",
month = dec,
day = "1",
doi = "10.1093/pasj/psab100",
language = "English",
volume = "73",
pages = "1631--1637",
journal = "Publication of the Astronomical Society of Japan",
issn = "0004-6264",
publisher = "Astronomical Society of Japan",
number = "6",

}

RIS

TY - JOUR

T1 - Subaru/FOCAS IFU revealed the metallicity gradient of a local extremely metal-poor galaxy

AU - Kashiwagi, Yuri

AU - Inoue, Akio K.

AU - Isobe, Yuki

AU - Nakajima, Kimihiko

AU - Ouchi, Masami

AU - Ozaki, Shinobu

AU - Fujimoto, Seiji

AU - Ono, Yoshiaki

AU - Kojima, Takashi

PY - 2021/12/1

Y1 - 2021/12/1

N2 - 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 log(10)(M-*/M-circle dot) = 5.8, respectively. The measured metallicity gradient is -0.36 +/- 0.04 dex kpc(-1) corresponding to -0.049 +/- 0.006 dex R-e(-1) for the continuum effective radius of R-e = 0.14 kpc. Our observation has successfully demonstrated that three-dimensional spectroscopy with 8 m-class telescopes is powerful enough to reveal the metallicity distribution in local EMPGs, providing precious information on the baryon cycle in local analogs of primordial galaxies in the early Universe.

AB - 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 log(10)(M-*/M-circle dot) = 5.8, respectively. The measured metallicity gradient is -0.36 +/- 0.04 dex kpc(-1) corresponding to -0.049 +/- 0.006 dex R-e(-1) for the continuum effective radius of R-e = 0.14 kpc. Our observation has successfully demonstrated that three-dimensional spectroscopy with 8 m-class telescopes is powerful enough to reveal the metallicity distribution in local EMPGs, providing precious information on the baryon cycle in local analogs of primordial galaxies in the early Universe.

KW - galaxies: abundances

KW - galaxies: dwarf

KW - galaxies: evolution

KW - galaxies: individual (HSC J1631+4426)

KW - galaxies: ISM

KW - ABUNDANCE GRADIENTS

KW - MASS-METALLICITY

KW - DWARF GALAXIES

KW - GAS

KW - DISCOVERY

KW - EVOLUTION

U2 - 10.1093/pasj/psab100

DO - 10.1093/pasj/psab100

M3 - Journal article

VL - 73

SP - 1631

EP - 1637

JO - Publication of the Astronomical Society of Japan

JF - Publication of the Astronomical Society of Japan

SN - 0004-6264

IS - 6

ER -

ID: 289234317