Blueberry galaxies up to 200 Mpc and their optical and infrared properties

Abstract

Dwarf highly star-forming galaxies (SFGs) dominated the early Universe and are considered the main driver of its reionization. However, direct observations of these distant galaxies are mainly confined to rest-frame ultraviolet and visible light, limiting our understanding of their complete properties. Therefore, it is still paramount to study their local analogs, the green pea (GP) and blueberry (BB) galaxies. This work aims to expand our knowledge of BBs by identifying a new sample that is closer and in the southern sky. In addition to the already known BBs, this new sample will allow for a statistically significant study of their properties probed by visible and infrared (IR) light. By utilizing the HECATE catalog, which provides photometry and characterization of galaxies, along with data from Pan-STARSS and SDSS, this study selects and analyzes a new sample of BBs. We employed spectral energy distribution fitting to derive homogeneous measurements of star-formation rates and stellar masses. Additionally, we measured emission-line fluxes, including $\mathrm{HeII}\lambda 4686$, through spectral fitting. Through this work, we identified 48 BBs, of which 40 were first recognized as such, with the nearest at 19~Mpc. 14 of the BBs are in the south sky. The BBs tend to be extremely IR red in both WISE $W1-W2$ and $W2-W3$ colors, distinguishing them from typical SFGs. Dwarf SFGs with higher specific star-formation rates tend to have redder IR colors. Blueberry galaxies stand out as the most intensely star-forming sources in the local Universe among dwarf galaxies. They exhibit unique characteristics, such as being intrinsically bluer in visible light, redder in the infrared, and less massive. They also have higher specific star-formation rates, equivalent widths, lower metallicities, and the most strongly ionized interstellar medium compared to typical SFGs and GPs.

18 pages, 11 + 4 (appendix) figures. Accepted for publication in Astronomy & Astrophysics on 2024-05-02. Updated to match the published version

References in corpus (24)

• UV Star Formation Rates in the Local Universe
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• The LOFAR Two-metre Sky Survey -- V. Second data release
• The Mass-Metallicity and the Fundamental Metallicity Relation revisited on a fully Te-based abundance scale for galaxies
• Metallicity Effects on Dust Properties in Starbursting Galaxies
• Fitting AGN/galaxy X-ray-to-radio SEDs with CIGALE and improvement of the code
• First look with JWST spectroscopy: $z\sim 8$ galaxies resemble local analogues
• Dust Destruction in the High-Velocity Shocks Driven by Supernovae in the Early Universe
• Blueberry galaxies: the lowest mass young starbursts
• The main sequence of star forming galaxies I. The local relation and its bending
• Mid-Infrared Colors of Dwarf Galaxies: Young Starbursts Mimicking Active Galactic Nuclei
• Relative Role of Stars and Quasars in Cosmic Reionization
• The Heraklion Extragalactic Catalogue (HECATE): a value-added galaxy catalogue for multi-messenger astrophysics
• Neutral Gas Properties and Ly$\alpha$ Escape in Extreme Green Pea Galaxies
• Properties of the KISS Green Pea Galaxies
• Strong [OIII]λ5007 emission line compact galaxies in LAMOST DR9: Blueberries, Green Peas and Purple Grapes
• Polycyclic aromatic hydrocarbon feature deficit of starburst galaxies in the AKARI North Ecliptic Pole Deep Field
• The Star Formation Reference Survey-V: the effect of extinction, stellar mass, metallicity, and nuclear activity on star-formation rates based on H$\alpha$ emission
• Star-formation rate and stellar mass calibrations based on infrared photometry and their dependence on stellar population age and extinction
• Gems of the Galaxy Zoos -- a Wide-Ranging Hubble Space Telescope Gap-Filler Program
• A versatile classification tool for galactic activity using optical and infrared colors
• Strong [O III] λ5007 Compact Galaxies Identified from SDSS DR16 and Their Scaling Relations