An infrared study of local galaxy mergers

Alfredo Carpineti; Sugata Kaviraj; Ashley K. Hyde; David L. Clements; Kevin Schawinski; Daniel Darg; Chris J. Lintott

doi:10.1051/0004-6361/201425276

An infrared study of local galaxy mergers

Alfredo Carpineti, Sugata Kaviraj, Ashley K. Hyde, David L. Clements, Kevin Schawinski, Daniel Darg, Chris J. Lintott

Centre for Astrophysics Research (CAR)

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Abstract

We combine a large, homogeneous sample of $\sim$3000 local mergers with the Imperial IRAS Faint Source Redshift Catalogue (IIFSCz), to perform a blind far-infrared (FIR) study of the local merger population. The IRAS-detected mergers are mostly ($98\%$) spiral-spiral systems, residing in low density environments, a median FIR luminosity of $10^{11} L_\odot$ (which translates to a median star formation rate of around 15$M_\odot yr^{-1}$). The FIR luminosity -- and therefore the star formation rate -- shows little correlation with group richness and scales with the total stellar mass of the system, with little or no dependence on the merger mass ratio. In particular, minor mergers (mass ratios $

Original language	English
Number of pages	7
Journal	Astronomy & Astrophysics
Volume	577
DOIs	https://doi.org/10.1051/0004-6361/201425276
Publication status	Published - 13 May 2015

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astro-ph.GA

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10.1051/0004-6361/201425276

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abstract = "We combine a large, homogeneous sample of $\sim$3000 local mergers with the Imperial IRAS Faint Source Redshift Catalogue (IIFSCz), to perform a blind far-infrared (FIR) study of the local merger population. The IRAS-detected mergers are mostly ($98\%$) spiral-spiral systems, residing in low density environments, a median FIR luminosity of $10^{11} L_\odot$ (which translates to a median star formation rate of around 15$M_\odot yr^{-1}$). The FIR luminosity -- and therefore the star formation rate -- shows little correlation with group richness and scales with the total stellar mass of the system, with little or no dependence on the merger mass ratio. In particular, minor mergers (mass ratios $",

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AU - Carpineti, Alfredo

AU - Kaviraj, Sugata

AU - Hyde, Ashley K.

AU - Clements, David L.

AU - Schawinski, Kevin

AU - Darg, Daniel

AU - Lintott, Chris J.

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PY - 2015/5/13

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N2 - We combine a large, homogeneous sample of $\sim$3000 local mergers with the Imperial IRAS Faint Source Redshift Catalogue (IIFSCz), to perform a blind far-infrared (FIR) study of the local merger population. The IRAS-detected mergers are mostly ($98\%$) spiral-spiral systems, residing in low density environments, a median FIR luminosity of $10^{11} L_\odot$ (which translates to a median star formation rate of around 15$M_\odot yr^{-1}$). The FIR luminosity -- and therefore the star formation rate -- shows little correlation with group richness and scales with the total stellar mass of the system, with little or no dependence on the merger mass ratio. In particular, minor mergers (mass ratios $

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An infrared study of local galaxy mergers

Abstract

Keywords

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