Peekaboo : the extremely metal poor dwarf galaxy HIPASS J1131-31

I. D. Karachentsev; L. N. Makarova; B. S. Koribalski; G. S. Anand; R. B. Tully; A. Y. Kniazev

Peekaboo : the extremely metal poor dwarf galaxy HIPASS J1131-31

I. D. Karachentsev
, L. N. Makarova
, B. S. Koribalski
, G. S. Anand
, R. B. Tully
, A. Y. Kniazev

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The dwarf irregular galaxy HIPASS J1131-31 was discovered as a source of HI emission at low redshift in such close proximity of a bright star that we call it Peekaboo. The galaxy resolves into stars in images with Hubble Space Telescope, leading to a distance estimate of 6.8 Â± 0.7 Mpc. Spectral optical observations with the Southern African Large Telescope reveal HIPASS J1131-31 to be one of the most extremely metal-poor galaxies known with the gas-phase oxygen abundance 12 + log(O/H) = 6.99 Â± 0.16 dex via the direct [O III] 4363 line method and 6.87 Â± 0.07 dex from the two strong line empirical methods. The red giant branch of the system is tenuous compared with the prominence of the features of young populations in the colour-magnitude diagram, inviting speculation that star formation in the galaxy only began in the last few Gyr.

Original language	English
Pages (from-to)	5893-5903
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	518
Issue number	4
Publication status	Published - 1 Feb 2023

Bibliographical note

Publisher Copyright:
© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

Keywords

galaxies: dwarf
galaxies: irregular
galaxies: star formation
galaxies: individual: HIPASS J1131-31

Cite this

@article{36724010fc5d41e6b921c6d7bb5540b1,

title = "Peekaboo : the extremely metal poor dwarf galaxy HIPASS J1131-31",

abstract = "The dwarf irregular galaxy HIPASS J1131-31 was discovered as a source of HI emission at low redshift in such close proximity of a bright star that we call it Peekaboo. The galaxy resolves into stars in images with Hubble Space Telescope, leading to a distance estimate of 6.8 {\^A}± 0.7 Mpc. Spectral optical observations with the Southern African Large Telescope reveal HIPASS J1131-31 to be one of the most extremely metal-poor galaxies known with the gas-phase oxygen abundance 12 + log(O/H) = 6.99 {\^A}± 0.16 dex via the direct [O III] 4363 line method and 6.87 {\^A}± 0.07 dex from the two strong line empirical methods. The red giant branch of the system is tenuous compared with the prominence of the features of young populations in the colour-magnitude diagram, inviting speculation that star formation in the galaxy only began in the last few Gyr.",

keywords = "galaxies: dwarf, galaxies: irregular, galaxies: star formation, galaxies: individual: HIPASS J1131-31",

author = "Karachentsev, \{I. D.\} and Makarova, \{L. N.\} and Koribalski, \{B. S.\} and Anand, \{G. S.\} and Tully, \{R. B.\} and Kniazev, \{A. Y.\}",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2023",

month = feb,

day = "1",

language = "English",

volume = "518",

pages = "5893--5903",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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TY - JOUR

T1 - Peekaboo : the extremely metal poor dwarf galaxy HIPASS J1131-31

AU - Karachentsev, I. D.

AU - Makarova, L. N.

AU - Koribalski, B. S.

AU - Anand, G. S.

AU - Tully, R. B.

AU - Kniazev, A. Y.

PY - 2023/2/1

Y1 - 2023/2/1

N2 - The dwarf irregular galaxy HIPASS J1131-31 was discovered as a source of HI emission at low redshift in such close proximity of a bright star that we call it Peekaboo. The galaxy resolves into stars in images with Hubble Space Telescope, leading to a distance estimate of 6.8 Â± 0.7 Mpc. Spectral optical observations with the Southern African Large Telescope reveal HIPASS J1131-31 to be one of the most extremely metal-poor galaxies known with the gas-phase oxygen abundance 12 + log(O/H) = 6.99 Â± 0.16 dex via the direct [O III] 4363 line method and 6.87 Â± 0.07 dex from the two strong line empirical methods. The red giant branch of the system is tenuous compared with the prominence of the features of young populations in the colour-magnitude diagram, inviting speculation that star formation in the galaxy only began in the last few Gyr.

AB - The dwarf irregular galaxy HIPASS J1131-31 was discovered as a source of HI emission at low redshift in such close proximity of a bright star that we call it Peekaboo. The galaxy resolves into stars in images with Hubble Space Telescope, leading to a distance estimate of 6.8 Â± 0.7 Mpc. Spectral optical observations with the Southern African Large Telescope reveal HIPASS J1131-31 to be one of the most extremely metal-poor galaxies known with the gas-phase oxygen abundance 12 + log(O/H) = 6.99 Â± 0.16 dex via the direct [O III] 4363 line method and 6.87 Â± 0.07 dex from the two strong line empirical methods. The red giant branch of the system is tenuous compared with the prominence of the features of young populations in the colour-magnitude diagram, inviting speculation that star formation in the galaxy only began in the last few Gyr.

KW - galaxies: dwarf

KW - galaxies: irregular

KW - galaxies: star formation

KW - galaxies: individual: HIPASS J1131-31

UR - https://hdl.handle.net/1959.7/uws:73732

UR - https://www.scopus.com/pages/publications/85159142303

M3 - Article

SN - 0035-8711

VL - 518

SP - 5893

EP - 5903

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Peekaboo : the extremely metal poor dwarf galaxy HIPASS J1131-31

Abstract

Bibliographical note

Keywords

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