Major Merging History in CANDELS. I. Evolution of the Incidence of Massive Galaxy-Galaxy Pairs from z=3 to z~0

Abstract

The rate of major galaxy-galaxy merging is theoretically predicted to steadily increase with redshift during the peak epoch of massive galaxy development ($1\le z\le 3$). We use close-pair statistics to objectively study the incidence of massive galaxies (stellar $M_1\ge 2\times 10^{10}{M}_{\odot }$) hosting major companions ($1\le M_1/M_2\le 4$; i.e., $<$4:1) at six epochs spanning $0<z<3$. We select companions from a nearly complete, mass-limited ($\ge 5\times 10^9{M}_{\odot }$) sample of 23,696 galaxies in the five CANDELS fields and the SDSS. Using $5-50$ kpc projected separation and close redshift proximity criteria, we find that the major companion fraction $f_{\mathrm{mc}}(z)$ based on stellar mass-ratio (MR) selection increases from 6% ($z\sim 0$) to 16% ($z\sim 0.8$), then turns over at $z\sim 1$ and decreases to 7% ($z\sim 3$). Instead, if we use a major F160W flux ratio (FR) selection, we find that $f_{\mathrm{mc}}(z)$ increases steadily until $z=3$ owing to increasing contamination from minor (MR$>$4:1) companions at $z>1$. We show that these evolutionary trends are statistically robust to changes in companion proximity. We find disagreements between published results are resolved when selection criteria are closely matched. If we compute merger rates using constant fraction-to-rate conversion factors ($C_{\mathrm{merg},\mathrm{pair}}=0.6$ and $T_{\mathrm{obs},\mathrm{pair}}=0.65\mathrm{Gyr}$), we find that MR rates disagree with theoretical predictions at $z>1.5$. Instead, if we use an evolving $T_{\mathrm{obs},\mathrm{pair}}(z)\propto (1+z{)}^{-2}$ from Snyder et al., our MR-based rates agree with theory at $0<z<3$. Our analysis underscores the need for detailed calibration of $C_{\mathrm{merg},\mathrm{pair}}$ and $T_{\mathrm{obs},\mathrm{pair}}$ as a function of redshift, mass and companion selection criteria to better constrain the empirical major merger history.

27 pages, 15 figures, 5 tables. Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal

References in corpus (38)

• Cosmic Star Formation History
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• EAZY: A Fast, Public Photometric Redshift Code
• A Semi-Analytic Model for the Co-evolution of Galaxies, Black Holes, and Active Galactic Nuclei
• Formation of Massive Galaxies at High Redshift: Cold Streams, Clumpy Disks and Compact Spheroids
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• PRIMUS: Constraints on Star Formation Quenching and Galaxy Merging, and the Evolution of the Stellar Mass Function From z=0-1
• The effect of galaxy mass ratio on merger--driven starbursts
• Star formation efficiency in galaxy interactions and mergers: a statistical study
• A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: II. Formation of Red Ellipticals
• Stellar masses from the CANDELS survey: the GOODS-South and UDS fields
• On the frequency, intensity and duration of starburst episodes triggered by galaxy interactions and mergers
• The Nearly Universal Merger Rate of Dark Matter Haloes in Lambda-CDM Cosmology
• The Redshift Evolution of Wet, Dry, and Mixed Galaxy Mergers from Close Galaxy Pairs in the DEEP2 Galaxy Redshift Survey
• The Structures of Distant Galaxies I: Galaxy Structures and the Merger Rate to z~3 in the Hubble Ultra-Deep Field
• A calibration of the relation between the abundance of close galaxy pairs and the rate of galaxy mergers
• The Structures of Distant Galaxies - III: The Merger History of over 20,000 Massive Galaxies at z < 1.2
• Ongoing Assembly of Massive Galaxies by Major Merging in Large Groups and Clusters from the SDSS
• CANDELS Multiwavelength Catalogs: Source Identification and Photometry in the CANDELS COSMOS Survey Field
• From Tidal Dwarf Galaxies to Satellite Galaxies
• The Millennium Galaxy Catalogue: The connection between close pairs and asymmetry; implications for the galaxy merger rate
• The Luminosity Dependence of the Galaxy Merger Rate
• Host galaxies of luminous z$\sim$0.6 quasars: Major mergers are not prevalent at the highest AGN luminosities
• Merger Rates of Dark-Matter Haloes
• A consistent measure of the merger histories of massive galaxies using close-pair statistics I: Major mergers at $z<3.5$
• The Dependence of the Mass Assembly History of Cold Dark Matter Halos on Environment
• Incidence of WISE-Selected Obscured AGNs in Major Mergers and Interactions from the SDSS
• Early formation of massive, compact, spheroidal galaxies with classical profiles by violent disc instability or mergers
• Massive Close Pairs Measure Rapid Galaxy Assembly in Mergers at High Redshift
• A Surprisingly High Pair Fraction for Extremely Massive Galaxies at z ~ 3 in the GOODS NICMOS Survey
• Galaxy Mergers at z>1 in the HUDF: Evidence for a Peak in the Major Merger Rate of Massive Galaxies
• The VIMOS VLT Deep Survey: the contribution of minor mergers to the growth of L_B >= L*_B galaxies since z ~ 1 from spectroscopically identified pairs
• The effect of the environment on the stellar mass - size relation of present-day galaxies
• Major mergers are not significant drivers of star formation or morphological transformation around the epoch of peak cosmic star formation
• Triggering of merger-induced starbursts by the tidal field of galaxy groups and clusters
• The merger-driven evolution of warm infrared luminous galaxies
• The redshift evolution of major merger triggering of luminous AGN: a slight enhancement at z$\sim$2
• Merging Galaxies with Tidal Tails in COSMOS to z=1

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