Real galaxy mergers from galaxy pair catalogues

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Standard

Real galaxy mergers from galaxy pair catalogues. / Pfister, Hugo; Dotti, Massimo; Laigle, Clothilde; Dubois, Yohan; Volonteri, Marta.

I: Monthly Notices of the Royal Astronomical Society, Bind 493, Nr. 1, 03.2020, s. 922-929.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Pfister, H, Dotti, M, Laigle, C, Dubois, Y & Volonteri, M 2020, 'Real galaxy mergers from galaxy pair catalogues', Monthly Notices of the Royal Astronomical Society, bind 493, nr. 1, s. 922-929. https://doi.org/10.1093/mnras/staa227

APA

Pfister, H., Dotti, M., Laigle, C., Dubois, Y., & Volonteri, M. (2020). Real galaxy mergers from galaxy pair catalogues. Monthly Notices of the Royal Astronomical Society, 493(1), 922-929. https://doi.org/10.1093/mnras/staa227

Vancouver

Pfister H, Dotti M, Laigle C, Dubois Y, Volonteri M. Real galaxy mergers from galaxy pair catalogues. Monthly Notices of the Royal Astronomical Society. 2020 mar.;493(1):922-929. https://doi.org/10.1093/mnras/staa227

Author

Pfister, Hugo ; Dotti, Massimo ; Laigle, Clothilde ; Dubois, Yohan ; Volonteri, Marta. / Real galaxy mergers from galaxy pair catalogues. I: Monthly Notices of the Royal Astronomical Society. 2020 ; Bind 493, Nr. 1. s. 922-929.

Bibtex

@article{35ebc791924b434eb4245c19cfef4cc4,
title = "Real galaxy mergers from galaxy pair catalogues",
abstract = "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 data available at a given time, limiting our ability to constrain the exact role of mergers. In this paper we use the light-cone of the HORIZON-AGN simulation, for which we know the fate of each pair, to test three selection processes aiming at identifying true merging pairs. We find that the simplest one (selecting objects within two thresholds on projected distance d and redshift difference Delta z) gives similar results than the most complex one (based on a neural network analysing d, Delta z, redshift of the primary, masses/star formation rates/aspect ratio of both galaxies). Our best thresholds are d(th) similar to 100 kpc and Delta z(th) similar to 10(-3), in agreement with recent results.",
keywords = "galaxies: evolution, galaxies: kinematics and dynamics, methods: observational, SUPERMASSIVE BLACK-HOLES, ULTRALUMINOUS INFRARED GALAXIES, COSMOLOGICAL SIMULATIONS, MAJOR MERGERS, EXTRA LIGHT, EVOLUTION, GROWTH, DARK, MATTER, DISSIPATION",
author = "Hugo Pfister and Massimo Dotti and Clothilde Laigle and Yohan Dubois and Marta Volonteri",
year = "2020",
month = mar,
doi = "10.1093/mnras/staa227",
language = "English",
volume = "493",
pages = "922--929",
journal = "Royal Astronomical Society. Monthly Notices",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "1",

}

RIS

TY - JOUR

T1 - Real galaxy mergers from galaxy pair catalogues

AU - Pfister, Hugo

AU - Dotti, Massimo

AU - Laigle, Clothilde

AU - Dubois, Yohan

AU - Volonteri, Marta

PY - 2020/3

Y1 - 2020/3

N2 - 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 data available at a given time, limiting our ability to constrain the exact role of mergers. In this paper we use the light-cone of the HORIZON-AGN simulation, for which we know the fate of each pair, to test three selection processes aiming at identifying true merging pairs. We find that the simplest one (selecting objects within two thresholds on projected distance d and redshift difference Delta z) gives similar results than the most complex one (based on a neural network analysing d, Delta z, redshift of the primary, masses/star formation rates/aspect ratio of both galaxies). Our best thresholds are d(th) similar to 100 kpc and Delta z(th) similar to 10(-3), in agreement with recent results.

AB - 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 data available at a given time, limiting our ability to constrain the exact role of mergers. In this paper we use the light-cone of the HORIZON-AGN simulation, for which we know the fate of each pair, to test three selection processes aiming at identifying true merging pairs. We find that the simplest one (selecting objects within two thresholds on projected distance d and redshift difference Delta z) gives similar results than the most complex one (based on a neural network analysing d, Delta z, redshift of the primary, masses/star formation rates/aspect ratio of both galaxies). Our best thresholds are d(th) similar to 100 kpc and Delta z(th) similar to 10(-3), in agreement with recent results.

KW - galaxies: evolution

KW - galaxies: kinematics and dynamics

KW - methods: observational

KW - SUPERMASSIVE BLACK-HOLES

KW - ULTRALUMINOUS INFRARED GALAXIES

KW - COSMOLOGICAL SIMULATIONS

KW - MAJOR MERGERS

KW - EXTRA LIGHT

KW - EVOLUTION

KW - GROWTH

KW - DARK

KW - MATTER

KW - DISSIPATION

U2 - 10.1093/mnras/staa227

DO - 10.1093/mnras/staa227

M3 - Journal article

VL - 493

SP - 922

EP - 929

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

SN - 0035-8711

IS - 1

ER -

ID: 247935305