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Related papers: Galaxy Merger Rates up to z $\sim$ 3 using a Bayes…

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Galaxy mergers are known to trigger bursts of central star formation, which should therefore lead to stellar mass growth in their inner regions. However, observational measurements of this `burst mass fraction' are scant. Here, we assemble…

Astrophysics of Galaxies · Physics 2026-04-27 Sara L. Ellison , Leonardo Ferreira

One of the central challenges to establishing the role of mergers in galaxy evolution is the selection of pure and complete merger samples in observations. In particular, while large and reasonably pure interacting galaxy pair samples can…

Astrophysics of Galaxies · Physics 2022-01-12 Connor Bottrell , Maan Hani , Hossen Teimoorinia , David R. Patton , Sara L. Ellison

Many theoretical and observational studies have suggested that galaxy mergers may trigger enhanced star formation or active galactic nuclei (AGN) activity. We present an analysis of merging and nonmerging galaxies from $0.2 \leq z \leq 3$…

Galaxy mergers play a crucial role in galaxy evolution. However, the correlation between mergers and the local environment of galaxies is not fully understood. We aim to address the question of whether galaxy mergers prefer denser or less…

Astrophysics of Galaxies · Physics 2024-05-31 U. Sureshkumar , A. Durkalec , A. Pollo , W. J. Pearson , D. J. Farrow , A. Narayanan , J. Loveday , E. N. Taylor , L. E. Suelves

In the context of the hierarchical formation of galaxies, we investigated the role played by mergers in shaping the scale relations of galaxies, that is the projections of their Fundamental Plane onto the \IeRe, \IeSig, \MRa\ and \Lsig\…

Astrophysics of Galaxies · Physics 2026-04-17 Cesare Chiosi , Mauro D'Onofrio , Emanuela Chiosi

Mergers of galaxies are extremely violent events shaping their evolution. Such events are thought to trigger starbursts and, possibly, black hole accretion. Nonetheless, it is still not clear how to know the fate of a galaxy pair from the…

Astrophysics of Galaxies · Physics 2020-02-05 Hugo Pfister , Massimo Dotti , Clothilde Laigle , Yohan Dubois , Marta Volonteri

The large number of galaxies imaged by digital sky surveys reinforces the need for computational methods for analyzing galaxy morphology. While the morphology of most galaxies can be associated with a stage on the Hubble sequence,…

Instrumentation and Methods for Astrophysics · Physics 2013-09-17 Lior Shamir , Anthony Holincheck , John Wallin

Galaxy clusters are the largest gravitationally bound systems, and they continue their growth through mergers in a hierarchical {\Lambda}CDM Universe. Therefore, we can describe the merger stage of a cluster as the dynamical state of…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-12 Hyowon Kim , Marco Canducci , Rory Smith , Peter Tino , Yara Jaffe , Ho Seong Hwang , Jihye Shin , Kyungwon Chun

Merging galaxy systems provides observational evidence of the existence of dark matter and constraints on its properties. Therefore, statistical uniform samples of merging systems would be a powerful tool for several studies. In this work…

Cosmology and Nongalactic Astrophysics · Physics 2016-02-03 Martín de los Rios , Mariano J. Domínguez R. , Dante Paz , Manuel Merchán

We have used the 28'x 28' HST image mosaic from the GEMS (Galaxy Evolution from Morphology and SEDs) survey in conjunction with the COMBO-17 photometric redshift survey to constrain the incidence of major mergers between spheroid-dominated…

HST images of a sample of 285 galaxies with measured z from the CFRS and Autofib-LDSS redshift surveys are analysed to derive the evolution of the merger fraction out to z~1. We have performed visual and machine-based merger…

Deep imaging programs, such as MATLAS which has just been completed at the CFHT, allows us to study with their diffuse light the outer stellar populations around large number of galaxies. We have carried out a systematic census of their…

Astrophysics of Galaxies · Physics 2017-03-29 Pierre-Alain Duc

We study non-parametric morphologies of mergers events in a cosmological context, using the Illustris project. We produce mock g-band images comparable to observational surveys from the publicly available Illustris simulation idealized mock…

We investigate the fraction of close pairs and morphologically identified mergers on and above the star-forming main sequence (MS) at 0.2$\leq z\leq$2.0. The novelty of our work lies in the use of a non-parametric morphological…

A significant fraction of high redshift star-forming disc galaxies are known to host giant clumps, whose nature and role in galaxy evolution are yet to be understood. In this work we first present a new method based on neural networks to…

We use simulated cluster member galaxies from Illustris TNG300-1 to develop a technique for measuring the galaxy cluster mass accretion rate (MAR) that can be applied directly to observations. We analyze 1318 IllustrisTNG clusters of…

Cosmology and Nongalactic Astrophysics · Physics 2023-12-13 Michele Pizzardo , Margaret J. Geller , Scott J. Kenyon , Ivana Damjanov , Antonaldo Diaferio

We aim to generate a catalogue of merging galaxies within the 5.4 sq. deg. North Ecliptic Pole over the redshift range $0.0 < z < 0.3$. To do this, imaging data from the Hyper Suprime-Cam are used along with morphological parameters derived…

The importance of the post-merger epoch in galaxy evolution has been well-documented, but post-mergers are notoriously difficult to identify. While the features induced by mergers can sometimes be distinctive, they are frequently missed by…

Astrophysics of Galaxies · Physics 2022-06-08 Robert W. Bickley , Sara L. Ellison , David R. Patton , Connor Bottrell , Stephen Gwyn , Michael J. Hudson

We investigate the incidence of major mergers creating >10e11 Msun galaxies in present-day groups and clusters more massive than 2.5e13 Msun. We identify 38 pairs of massive galaxies with mutual tidal interaction signatures selected from…

This paper begins a series in which we examine the structures of distant galaxies to directly determine the history of their formation modes. We start this series by examining the structures of z_F850LP < 27 galaxies in the Hubble…

Astrophysics · Physics 2009-11-13 Christopher J. Conselice , Sheena Rajgor , Robert Myers