2022AJ....164..127C


Query : 2022AJ....164..127C

2022AJ....164..127C - Astron. J., 164, 127 (2022/October-0)

SDSS-IV MaNGA: The MaNGA Dwarf Galaxy Sample Presentation.

CANO-DIAZ M., HERNANDEZ-TOLEDO H.M., RODRIGUEZ-PUEBLA A., IBARRA-MEDEL H.J., AVILA-REESE V., VALENZUELA O., MEDELLIN-HURTADO A.E., VAZQUEZ-MATA J.A., WEIJMANS A., GONZALEZ J.J., AQUINO-ORTIZ E., MARTINEZ-VAZQUEZ L.A. and LANE R.R.

Abstract (from CDS):

We present the MaNGA Dwarf galaxy (MaNDala) Value Added Catalog (VAC), from the final release of the Sloan Digital Sky Survey-IV program. MaNDala consists of 136 randomly selected bright dwarf galaxies with M* < 109.1M⊙ and Mg > -18.5, making it the largest integral field spectroscopy homogeneous sample of dwarf galaxies. We release a photometric analysis of the g, r, and z broadband imaging based on the DESI Legacy Imaging Surveys, as well as a spectroscopic analysis based on the Pipe3D SDSS-IV VAC. Our release includes the surface brightness (SB), geometric parameters, and color profiles, Sérsic fits as well as stellar population properties (such as stellar ages, metallicities, and star formation histories), and emission lines' fluxes within the FOV and the effective radii of the galaxies. We find that the majority of the MaNDala galaxies are star-forming late-type galaxies with 〈nSersic,r〉 ∼ 1.6 that are centrals (central/satellite dichotomy). MaNDala covers a large range of SB values (we find 11 candidate ultra-diffuse galaxies and three compact ones), filling the gap between classical dwarfs and low-mass galaxies in the Kormendy Diagram and in the size-mass/luminosity relation, which seems to flatten at 108 < M*/M⊙ < 109 with 〈Re,r〉 ∼ 2.7 kpc. A large fraction of MaNDala galaxies formed from an early low-metallicity burst of SF, but also from late SF events from more metal-enriched gas: half of the MaNDala galaxies assembled 50% of their mass at 〈z〉 > 2, while the last 20% was at 〈z〉 < 0.3. Finally, a bending of the sSFR-M* relation at M* ∼ 109M⊙ for the main-sequence galaxies seems to be supported by MaNDala.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Dwarf galaxies

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 SDSS J033812.96-053225.5 EmG 03 38 12.9724397496 -05 32 25.468038888           ~ 17 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 Z 148-8 EmG 07 45 31.0846016448 +28 26 27.716566020   15.6       ~ 35 0
4 SDSS J082653.57+222859.5 AG? 08 26 53.580 +22 28 59.53           ~ 7 0
5 SDSS J130042.56+280658.6 LSB 13 00 42.566 +28 06 58.75 19.20   18.24 17.54   ~ 20 0
6 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
7 NAME Local Group GrG ~ ~           ~ 9325 0

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