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Title: XMP gas-rich dwarfs in nearby voids: candidate selection

Abstract

ABSTRACT We introduce a project aimed at systematically searching for eXtremely Metal-Poor (XMP) very gas-rich blue dwarfs in voids in the nearby Universe. Several such galaxies were first identified in the course of an unbiased study of the galaxy population in the nearby Lynx-Cancer void. These very rare and unusual galaxies appear to be the best proxies for the so-called Very Young Galaxies defined recently in the model simulations by Tweed et al. (2018). We discuss the main properties of 10 prototype objects residing in nearby voids and formulate criteria to search for similar dwarfs in other voids. The recently published sample of 1354 Nearby Void Galaxies is used to identify a subsample of 60 void dwarf XMP candidates. We provide a list of these XMP candidates with their main parameters and finding charts. These candidates are the subjects of subsequent spectral, photometric, and H i studies in the accompanying papers. Looking ahead, with reference to the submitted accompanying papers, we find that this study results in the discovery of many new XMP dwarfs with 12+log (O/H) ∼ 7.0–7.3 dex.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [3]
  1. Special Astrophysical Observatory of RAS, Nizhnij Arkhyz, Karachai-Circassia 369167, Russia
  2. Sternberg Astronomical Institute of Moscow State University, Moscow, 119992, Russia
  3. Sternberg Astronomical Institute of Moscow State University, Moscow, 119992, Russia, South Africa Astronomical Observatory, PO Box 9, 7935 Observatory, Cape Town, South Africa, South African Large Telescope, PO Box 9, 7935 Cape Town, South Africa
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1581853
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 492 Journal Issue: 1; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Pustilnik, S. A., Egorova, E. S., Perepelitsyna, Y. A., and Kniazev, A. Y. XMP gas-rich dwarfs in nearby voids: candidate selection. United Kingdom: N. p., 2019. Web. doi:10.1093/mnras/stz3417.
Pustilnik, S. A., Egorova, E. S., Perepelitsyna, Y. A., & Kniazev, A. Y. XMP gas-rich dwarfs in nearby voids: candidate selection. United Kingdom. doi:10.1093/mnras/stz3417.
Pustilnik, S. A., Egorova, E. S., Perepelitsyna, Y. A., and Kniazev, A. Y. Tue . "XMP gas-rich dwarfs in nearby voids: candidate selection". United Kingdom. doi:10.1093/mnras/stz3417.
@article{osti_1581853,
title = {XMP gas-rich dwarfs in nearby voids: candidate selection},
author = {Pustilnik, S. A. and Egorova, E. S. and Perepelitsyna, Y. A. and Kniazev, A. Y.},
abstractNote = {ABSTRACT We introduce a project aimed at systematically searching for eXtremely Metal-Poor (XMP) very gas-rich blue dwarfs in voids in the nearby Universe. Several such galaxies were first identified in the course of an unbiased study of the galaxy population in the nearby Lynx-Cancer void. These very rare and unusual galaxies appear to be the best proxies for the so-called Very Young Galaxies defined recently in the model simulations by Tweed et al. (2018). We discuss the main properties of 10 prototype objects residing in nearby voids and formulate criteria to search for similar dwarfs in other voids. The recently published sample of 1354 Nearby Void Galaxies is used to identify a subsample of 60 void dwarf XMP candidates. We provide a list of these XMP candidates with their main parameters and finding charts. These candidates are the subjects of subsequent spectral, photometric, and H i studies in the accompanying papers. Looking ahead, with reference to the submitted accompanying papers, we find that this study results in the discovery of many new XMP dwarfs with 12+log (O/H) ∼ 7.0–7.3 dex.},
doi = {10.1093/mnras/stz3417},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 492,
place = {United Kingdom},
year = {2019},
month = {12}
}

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