Host Galaxies of Ultra Strong Mg II absorbers at z $\sim$ 0.5

Abstract

From a sample of 109 candidate Ultra-Strong Mg II (USMgII; having rest equivalent width of Mg II absorption, $W_{2796}>3.0$ Angstrom) systems at z=0.4-0.6, we confirm 27 and identify host galaxies of 20 systems based on associated nebular line emission from our SALT observations or from SDSS fiber spectra. The measured impact parameter, [O II] luminosity, star formation rate, B-band luminosity and stellar mass are in the ranges $7.3\le D[kpc]\le 79$, $0.2\le L_{[OII]}[10^{41}erg{s}^{-1}]$ $\le 4.5$, $2.59\le SFR[M_{\odot }y{r}^{-1}]\le 33.51$, $0.15L_B^{\ast }\le L_B\le 1.63L_B^{\ast }$ and $10.21\le log[M_{\ast }/M_{\odot }]\le 11.62$ respectively. The impact parameters found are larger than that predicted by the $W_{2796}$ vs D relationship of the general population of Mg II absorbers. At a given D, USMgII host galaxies are more luminous and massive compared to typical Mg II absorbers. However, the measured SFRs are slightly lower than that of main-sequence galaxies with the same M${}_{\star }$ at $z\sim 0.5$. We report a correlation between $L_{[OII]}$ and W${}_{2796}$ for the full population of Mg II absorbers, driven mainly by the host galaxies of weak Mg II absorbers that tend to have low $L_{[OII]}$ and large impact parameters. We find at least $\sim$33% of the USMgII host galaxies (with a limiting magnitude of $m_r<23.6$) are isolated and the large $W_{2796}$ in these cases may originate from gas flows (infall/outflow) in single halos of massive but not starburst galaxies. We also find galaxy interactions could be responsible for large velocity widths in at least $\sim$17% cases.

arXiv commentAccepted for publication in MNRAS

References in corpus (97)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• Stellar population synthesis at the resolution of 2003
• The Sloan Digital Sky Survey: Technical Summary
• A Universal Density Profile from Hierarchical Clustering
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Global Schmidt Law in Star Forming Galaxies
• Theoretical Modeling of Starburst Galaxies
• Overview of the DESI Legacy Imaging Surveys
• [O III]/[N II] as an Abundance Indicator at High Redshift
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• A Quantitative Comparison of SMC, LMC, and Milky Way UV to NIR Extinction Curves
• Using Strong Lines to Estimate Abundances in Extragalactic HII Regions and Starburst Galaxies
• Galaxy Luminosity Functions to z~1: DEEP2 vs. COMBO-17 and Implications for Red Galaxy Formation
• Inferring the star-formation histories of massive quiescent galaxies with BAGPIPES: Evidence for multiple quenching mechanisms
• An updated MILES stellar library and stellar population models
• Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
• Ubiquitous outflows in DEEP2 spectra of star-forming galaxies at z=1.4
• The Origin and Evolution of the Galaxy Mass-Metallicity Relation
• The Cosmic Baryon Cycle and Galaxy Mass Assembly in the FIRE Simulations
• Modelling and interpreting spectral energy distributions of galaxies with BEAGLE
• Gas metallicity diagnostics in star-forming galaxies
• Evidence for Ubiquitous Collimated Galactic-Scale Outflows along the Star-Forming Sequence at z~0.5
• Ionization State of Inter-Stellar Medium in Galaxies: Evolution, SFR-M_star-Z Dependence, and Ionizing Photon Escape
• The Discovery of 1000 km/s Outflows in Massive Post-starburst Galaxies at z=0.6
• The radial and azimuthal profiles of Mg II absorption around 0.5 < z < 0.9 zCOSMOS galaxies of different colors, masses and environments
• The Cosmic Baryon and Metal Cycles
• Demographics and Physical Properties of Gas Out/Inflows at 0.4 < z < 1.4
• Evolution of Thermally Pulsing Asymptotic Giant Branch Stars I. The COLIBRI Code
• Optical Star-Formation Rate Indicators
• On the Origin of [OII] Emission in Red Sequence and Post-starburst Galaxies
• An Empirical Characterization of Extended Cool Gas Around Galaxies Using MgII Absorption Features
• How to measure galaxy star-formation histories I: Parametric models
• Physical properties of galactic winds using background quasars
• The Nature of LINER-like Emission in Red Galaxies
• Radiation pressure from massive star clusters as a launching mechanism for super-galactic winds
• Velocity-Metallicity Correlation for high-z DLA Galaxies: Evidence for a Mass-Metallicity Relation?
• On the mass function of star clusters
• The Kinematic Connection Between QSO-Absorbing Gas and Galaxies at Intermediate Redshift
• Average Extinction Curves and Relative Abundances for QSO Absorption Line Systems at 1 <= z_abs < 2
• The stellar-to-halo mass relation over the past 12 Gyr
• The JHU-SDSS metal absorption line catalog: redshift evolution and properties of Mg II absorbers
• The Direct Detection of Cool, Metal-Enriched Gas Accretion onto Galaxies at z ~ 0.5
• Theoretical Modeling of Star-Forming Galaxies I. Emission Line Diagnostic Grids for Local and Low-Metallicity Galaxies
• MAGIICAT II. General Characteristics of the MgII Absorbing Circumgalactic Medium
• An X-shooter composite of bright 1 < z < 2 quasars from UV to infrared
• New perspectives on strong z=0.5 MgII absorbers: are halo-mass and equivalent width anti-correlated?
• IZI: Inferring the Gas Phase Metallicity (Z) and Ionization Parameter (q) of Ionized Nebulae using Bayesian Statistics
• MusE GAs FLOw and Wind (MEGAFLOW) II. A study of gas accretion around $z\approx 1$ star-forming galaxies with background quasars
• A translucent interstellar cloud at z=2.69: CO, H2 and HD in the line-of-sight to SDSS J123714.60+064759.5
• Galaxy Counterparts of metal-rich Damped Lyman-alpha Absorbers - I: The case of the z=2.35 DLA towards Q2222-0946
• Optical properties and spatial distribution of MgII absorbers from SDSS image stacking
• MusE GAs FLOw and Wind (MEGAFLOW) III: galactic wind properties using background quasars
• What Determines the Incidence and Extent of MgII Absorbing Gas Around Galaxies?
• Predictions for the Angular Dependence of Gas Mass Flow Rate and Metallicity in the Circumgalactic Medium
• The local star-formation rate density: assessing calibrations using [OII], Ha and UV luminosities
• Large scale outflows from z ~ 0.7 starburst galaxies identified via ultra-strong MgII quasar absorption lines
• Probing star formation across cosmic time with absorption line systems
• Lensing, reddening and extinction effects of MgII absorbers from z=0.4 to z=2
• MUSE Analysis of Gas around Galaxies (MAGG) -- II: Metal-enriched halo gas around z~1 galaxies
• The SINFONI MgII Program for Line Emitters (SIMPLE): Discovering starbursts near QSO sight-lines
• SDSS IV MaNGA -- Metallicity and ionisation parameter in local star-forming galaxies from Bayesian fitting to photoionisation models
• Modeling the distribution of Mg II absorbers around galaxies using Background Galaxies & Quasars
• New Perspective on Galaxy Outflows From the First Detection of Both Intrinsic and Traverse Metal-Line Absorption
• Quasars probing intermediate redshift star-forming galaxies
• Detection of the 2175Å~ extinction feature and 21-cm absorption in two MgII systems at z~1.3
• A Complete Census of Circumgalactic MgII at Redshift z<~ 0.5
• A rise in the ionizing photons in star-forming galaxies over the past 5 billion years
• MusE GAs FLOw and Wind (MEGAFLOW) VIII. Discovery of a MgII emission halo probed by a quasar sightline
• The Statistical Properties of Neutral Gas at z<1.65 from UV Measurements of Damped Lyman Alpha Systems
• The Nature of H$\beta +$[O{\sc iii}] and [O{\sc ii}] emitters to $z\sim 5$ with HiZELS: stellar mass functions and the evolution of EWs
• The MUSE Ultra Deep Field (MUDF). II. Survey design and the gaseous properties of galaxy groups at 0.5 < z < 1.5
• HD molecules at high redshift: A low astration factor of deuterium in a solar-metallicity DLA system at z=2.418
• Galaxies probing galaxies: cool halo gas from a z = 0.47 post-starburst galaxy
• Evidence for dust reddening in DLAs identified through CaII H&K absorption
• Galaxies Probing Galaxies in PRIMUS - I. Sample, Spectroscopy, and Characteristics of the z~0.5 MgII-Absorbing Circumgalactic Medium
• An efficient technique for pre-selecting low redshift damped Lyman alpha systems
• Ultra-strong MgII Absorbers as a Signature of Cool Intragroup Gas
• The Self-Similarity of the Circumgalactic Medium with Galaxy Virial Mass: Implications for Cold-Mode Accretion
• A study of the circum-galactic medium at z ~ 0.6 using DLA-galaxies
• MUSE-ALMA Halos V: Physical properties and environment of z < 1.4 HI quasar absorbers
• Calcium H & K and sodium D absorption induced by the interstellar and circumgalactic media of the Milky Way
• Cold gas accretion by high-velocity clouds and their connection to QSO absorption-line systems
• The Environments of Ultra-strong Mg II Absorbers
• A SINFONI Integral Field Spectroscopy Survey for Galaxy Counterparts to Damped Lyman-alpha Systems - IV. Masses and Gas Flows
• The evolution of the [OII], Hβ and [OIII] emission-line luminosity functions over the last nine billions years
• The Geometry of Cold, Metal-Enriched Gas Around Galaxies at $z\sim 1.2$
• Detection of emission lines from z ~ 3 DLAs towards the QSO J2358+0149
• Dusty MgII absorbers: population statistics, extinction curves and gamma-ray burst sightlines
• Near Infrared spectroscopic observations of high redshift C~{\sc i} absorbers
• On the Observed W_MgII--L_[OII] Correlation in SDSS QSO Spectra
• Average [O II] nebular emission associated with Mg II absorbers: Dependence on Fe II absorption
• The Origin of [OII] Emission in Recently Quenched AGN Hosts
• [O II] nebular emission from Mg II absorbers: Star formation associated with the absorbing gas
• Galactic nebular lines in the fiber spectra of background QSOs: Reaching a hundred QSO-galaxy pairs with spectroscopic and photometric measurements
• A Study of the Point Spread Function in SDSS Images

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• The XQR-30 Metal Absorber Catalog: 778 Absorption Systems Spanning 2 < z < 6.5
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• Baryonic Ecosystem in Galaxies (BEINGMgII) -- II. Unveiling the Nature of Galaxies Harboring Cool Gas Reservoirs
• Ultra-strong MgII absorbers trace both inflowing and outflowing gas: insights from dual down-the-barrel and quasar sightlines
• HI 21-cm Absorption Associated with Foreground Galaxies on Top of Quasars
• Circumgalactic medium of quasar host galaxies at 0.4<z<0.8 probed by strong Mg II absorption
• Kinematic analysis of an Ultra-Strong MgII absorber at z~1.13 linking to Circumgalactic Gas Structures