The significant contribution of minor mergers to the cosmic star formation budget

@article{Kaviraj2014TheSC,
title={The significant contribution of minor mergers to the cosmic star formation budget},
author={Sugata Kaviraj},
journal={Monthly Notices of the Royal Astronomical Society},
year={2014},
volume={437},
pages={41}
}
• S. Kaviraj
• Published 30 September 2013
• Physics
• Monthly Notices of the Royal Astronomical Society
We estimate an empirical lower limit for the fraction of cosmic star formation that is triggered by minor mergers in the local Universe. Splitting the star-formation budget by galaxy morphology, we find that early-type galaxies (ETGs) host �14% of the budget, while Sb/Sc galaxies host the bulk (�53%) of the local star formation activity. Recent work indicates that star formation in nearby ETGs is driven by minor mergers, implying that at least �14% of local star formation is triggered by this…

Figures from this paper

The importance of minor-merger-driven star formation and black hole growth in disc galaxies
We use the SDSS Stripe 82 to empirically quantify the stellar-mass and black-hole growth triggered by minor mergers in local spiral (disk) galaxies. Since major mergers destroy disks and create
Star formation in simulated galaxies: understanding the transition to quiescence at 3 × 1010 M⊙
• Physics
• 2017
Star formation in galaxies relies on the availability of cold, dense gas, which, in turn, relies on factors internal and external to the galaxies. In order to provide a simple model for how star
Minor mergers: fundamental but unexplored drivers of galaxy evolution
• S. Kaviraj
• Physics
Proceedings of the International Astronomical Union
• 2015
Abstract We use the SDSS Stripe 82 to study the stellar-mass growth that is triggered by minor mergers in local disk galaxies. Since major mergers destroy disks and create spheroids, morphologically
Gas accretion as fuel for residual star formation in Galaxy Zoo elliptical galaxies
• Physics
Monthly Notices of the Royal Astronomical Society: Letters
• 2019
In this letter we construct a large sample of early-type galaxies (ETGs) with measured gas-phase metallicities from the Sloan Digital Sky Survey and Galaxy Zoo in order to investigate the origin of
Structural analysis of star-forming blue early-type galaxies - Merger-driven star formation in elliptical galaxies
Star-forming blue early-type galaxies at low redshift can give insight to the stellar mass growth of L$*$ elliptical galaxies in the local Universe. We wish to understand the reason for star
Using Galaxy Pairs to Probe Star Formation During Major Halo Mergers
• Physics
• 2015
Currently-proposed galaxy quenching mechanisms predict very different behaviours during major halo mergers, ranging from significant quenching enhancement (e.g., clump-induced gravitational heating
The distribution of local star formation activity as a function of galaxy stellar mass, environment and morphology
• Physics
• 2017
We present a detailed inventory of star formation in the local Universe, dissecting the cosmic star formation budget as a function of key variables that influence the star formation rate (SFR) of
Recent galaxy mergers and residual star formation of red sequence galaxies in galaxy clusters
• Physics
• 2016
This study explored the GALEX ultraviolet (UV) properties of optical red sequence galaxies in 4 rich Abell clusters at z \leq 0.1. In particular, we tried to find a hint of merger-induced recent star
Revealing the nature of star forming blue early-type galaxies at low redshift
• Physics
• 2015
Context: Star forming early-type galaxies with blue optical colours at low redshift can be used to test our current understanding of galaxy formation and evolution. Aims: We want to reveal the fuel
Dark influences II: gas and star formation in minor mergers of dwarf galaxies with dark satellites
• Physics
• 2015
It has been proposed that mergers induce starbursts and lead to important morphological changes in galaxies. Most studies so far have focused on large galaxies, but dwarfs might also experience such

References

SHOWING 1-10 OF 60 REFERENCES
The insignificance of major mergers in driving star formation at z ≃ 2
• Physics
• 2013
We study the significance of major-merger-driven star formation in the early Universe, by quantifying the contribution of this process to the total star formation budget in 80 massive (M∗ > 10 10 M⊙)
Triggering of Starbursts in Galaxies by Minor Mergers
• Physics
• 1994
Using numerical simulation, we explore the triggering of starburst activity in disk galaxies which accrete low-mass dwarf companions. In response to the tidal perturbation of an infalling satellite,
The role of minor mergers in the recent star formation history of early-type galaxies
• Physics
• 2009
We demonstrate that the large scatter in the ultra-violet (UV) colours of intermediate- mass early-type galaxies in the local Universe and the inferred low-level recent star formation in these
The UV properties of E+A galaxies: Constraints on feedback-driven quenching of star formation
• Physics
• 2007
We present the first large-scale study of E+A galaxies that incorporates photometry in the ultraviolet (UV ) wavelengths. E+A galaxies are ‘post-starburst’ systems, with strong Balmer absorption
Multiple minor mergers: formation of elliptical galaxies and constraints for the growth of spiral disks
Multiple, sequential mergers are unavoidable in the hierarchical build-up picture of galaxies, in particular for the minor mergers that are frequent and highly likely to have occured several times
A coincidence of disturbed morphology and blue UV colour: minor-merger-driven star formation in early-type galaxies at z ~ 0.6
• Physics
• 2010
We exploit multiwavelength photometry of early-type galaxies (ETGs) in the Cosmological Evolution Survey (COSMOS) to demonstrate that the low-level star formation activity in the ETG population at
Morphological Quenching of Star Formation: Making Early-Type Galaxies Red
• Physics
• 2009
We point out a natural mechanism for quenching of star formation in early-type galaxies (ETGs). It automatically links the color of a galaxy with its morphology and does not require gas consumption,
MINOR MERGERS AND THE SIZE EVOLUTION OF ELLIPTICAL GALAXIES
• Physics
• 2009
Using a high-resolution hydrodynamical cosmological simulation of the formation of a massive spheroidal galaxy we show that elliptical galaxies can be very compact and massive at high redshift in
Cold streams in early massive hot haloes as the main mode of galaxy formation
• Physics
Nature
• 2009
‘stream-fed galaxies’ are reported, formed from steady, narrow, cold gas streams that penetrate the shock-heated media of massive dark matter haloes and keep the rotating disk configuration intact, although turbulent and broken into giant star-forming clumps that merge into a central spheroid.
On the survival and destruction of spiral galaxies in clusters
• Physics
• 1999
We follow the evolution of disk galaxies within a cluster that forms hierarchically in a cold dark matter N-body simulation. At a redshift z=0.5 we select several dark matter halos that have quiet