Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 475, Issue 4, Pages 5133-5143Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty098
Keywords
galaxies: evolution; galaxies: formation; galaxies: high-redshift; galaxies: interactions
Categories
Funding
- NASA/ESA [HST-GO-12177, HST-GO-12328]
- NASA [NAS5-26555]
- STFC [ST/N002717/1] Funding Source: UKRI
Ask authors/readers for more resources
We established an accurate comparison between observationally and theoretically estimated major merger rates over a large range of mass (log M-bar/M-circle dot = 9.9-11.4) and redshift (z = 0.7-1.6). For this, we combined a new estimate of the merger rate from an exhaustive count of pairs within the virial radius of massive galaxies at z similar to 1.265 and cross-validated with their morphology, with estimates from the morpho-kinematic analysis of two other samples. Theoretical predictions were estimated using semi-empirical models with inputs matching the properties of the observed samples, while specific visibility time-scales scaled to the observed samples were used. Both theory and observations are found to agree within 30 per cent of the observed value, which provides strong support to the hierarchical assembly of galaxies over the probed ranges of mass and redshift. Here, we find that similar to 60 per cent of population of local massive (M-stellar = 10(10.3-11.6) M-circle dot) galaxies would have undergone a wet major merger since z = 1.5, consistently with previous studies. Such recent mergers are expected to result in the (re-) formation of a significant fraction of local disc galaxies.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available