XMP gas-rich dwarfs in Nearby Voids: candidate selection
arXiv:1912.06740 · doi:10.1093/mnras/stz3417
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 (VYGs) defined recently in the model simulations by Tweed et al. (2018). We discuss the main properties of ten 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 (NVG) 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 HI 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.
arXiv comment14 pages, 5 figures, 2 tables. Accepted for publication in MNRAS
References in corpus (69)
- The Seventh Data Release of the Sloan Digital Sky Survey
- HyperLEDA. III. The catalogue of extragalactic distances
- The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment
- Resolved stellar mass maps of galaxies. I: method and implications for global mass estimates
- The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic HI Source Catalog
- The Dark Energy Survey Data Release 1
- Our Peculiar Motion Away from the Local Void
- The most metal-poor galaxies
- Direct Oxygen Abundances for Low Luminosity LVL Galaxies
- The Metallicity-Luminosity Relation, Effective Yields, and Metal Loss in Spiral and Irregular Galaxies
- Dwarf galaxies in voids: Suppressing star formation with photo-heating
- Star formation sustained by gas accretion
- First science with SALT: peering at the accreting polar caps of the eclipsing polar SDSS J015543.40+002807.2
- The Void Galaxy Survey: Optical Properties and H I Morphology and Kinematics
- ALFALFA Discovery of the Nearby Gas-Rich Dwarf Galaxy Leo~P. III. An Extremely Metal Deficient Galaxy
- Leo P: An Unquenched Very Low-Mass Galaxy
- The Survey of HI in Extremely Low-mass Dwarfs (SHIELD)
- J0811+4730: the most metal-poor star-forming dwarf galaxy known
- Hunting for extremely metal-poor emission-line galaxies in the Sloan Digital Sky Survey: MMT and 3.5m APO observations
- MMT observations of new extremely metal-poor emission-line galaxies in the Sloan Digital Sky Survey
- Discovery of Eight New Extremely Metal--Poor Galaxies in the Sloan Digital Sky Survey
- Gas inflow and metallicity drops in star-forming galaxies
- ALFALFA Discovery of the Most Metal-Poor Gas-Rich Galaxy Known: AGC 198691
- An investigation of the luminosity-metallicity relation for a large sample of low-metallicity emission-line galaxies
- The slope of the Baryonic Tully-Fisher relation
- (Almost) Dark HI Sources in the ALFALFA Survey: The Intriguing Case of HI1232+20
- Deep Near-IR Surface Photometry of 57 Galaxies in the Local Sphere of Influence
- An MCMC determination of the primordial helium abundance
- HI and star formation in the most metal-deficient galaxies
- Search for Extremely Metal-poor Galaxies in the Sloan Digital Sky Survey (II): high electron temperature objects
- When are extremely metal-deficient galaxies extremely metal-deficient?
- The Star Formation History of the very metal poor BCD IZw18 from HST/ACS data
- Abundances in the H I envelope of the extremely low-metallicity Blue Compact Dwarf Galaxy SBS 0335-052 from Far Ultraviolet Spectroscopic Explorer observations
- Study of galaxies in the Lynx-Cancer void. I. Sample description
- KK246, a dwarf galaxy with extended H I disk in the Local Void
- Two extremely metal-poor emission-line galaxies in the Sloan Digital Sky Survey
- Searching for metal-deficient emission-line galaxy candidates: the final sample of the SDSS DR12 galaxies
- Discovery of the most metal-poor damped Lyman-alpha system
- Assembly of filamentary void galaxy configurations
- Towards understanding the structure of voids in the cosmic web
- J1234+3901: an extremely metal-deficient compact star-forming dwarf galaxy at redshift 0.133
- The bursting nature of star formation in compact star-forming galaxies from the Sloan Digital Sky Survey
- DDO 68: A flea with smaller fleas that on him prey
- I Zw 18 as morphological paradigm for rapidly assembling high-z galaxies
- Low-redshift lowest-metallicity star-forming galaxies in the SDSS DR14
- Study of galaxies in the Lynx-Cancer void. -- III. New extreme LSB dwarf galaxies
- Suites of dwarfs around nearby giant galaxies
- The Little Cub: Discovery of an Extremely Metal-Poor Star-Forming Galaxy in the Local Universe
- SDSS J092609.45+334304.1: a nearby unevolved galaxy
- Blue diffuse dwarf galaxies: a clearer picture
- Distance Determinations to SHIELD Galaxies from HST Imaging
- Chemical abundances and radial velocities in the extremely metal-poor galaxy DDO 68
- The metallicity of void dwarf galaxies
- Void galaxies in the nearby Universe. I. Sample description
- Study of galaxies in the Eridanus void. Sample and oxygen abundances
- Oxygen Abundance Measurements of SHIELD Galaxies
- Exploring the origins of a new, apparently metal-free gas cloud at z = 4.4
- The Enigmatic (Almost) Dark Galaxy Coma P: Distance Measurement and Stellar Populations from HST Imaging
- Extremely metal-poor galaxy DDO 68: the LBV, H-alpha shells and the most luminous stars
- UGC 3672: An unusual merging triplet of gas-rich galaxies in the Lynx-Cancer void
- Study of Galaxies in the Lynx-Cancer Void. IV. Photometric Properties
- On the dearth of ultra-faint extremely metal poor galaxies
- Very metal-poor galaxies: ionized gas kinematics in nine objects
- Properties of the most metal-poor gas-rich LSB dwarf galaxies SDSS J0015+0104 and J2354-0005 residing in the Eridanus void
- The frequency of very young galaxies in the local Universe: I. A test for galaxy formation and cosmological models
- Metal Abundances and Star-Formation Rates of Emission-Line Galaxies in and around the Bootes Void
- Unusual void galaxy DDO68: implications of the HST resolved photometry
- Nebular metallicities in two isolated Local Void dwarf galaxies
- Study of galaxies in the Lynx-Cancer void. VI. HI-observations with the Nancay Radio Telescope