Asymmetric Star Formation Efficiency Due to Ram Pressure Stripping

Paulina  Troncoso Iribarren; Nelson  Padilla; Sergio Contreras; Silvio  Rodriguez; Diego  García-Lambas; Claudia Lagos Urbina

doi:10.3390/galaxies4040077

Asymmetric Star Formation Efficiency Due to Ram Pressure Stripping

Paulina Troncoso Iribarren, Nelson Padilla, Sergio Contreras, Silvio Rodriguez, Diego García-Lambas, Claudia Lagos Urbina

International Centre for Radio Astronomy Research (ICRAR)

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

Previous works have shown that a dense cluster environment affects satellite galaxy properties and accelerates or truncates their evolutionary processes. In this work, we use the EAGLE simulation to study this effect, dissecting the galaxies in two halves: the one that is falling directly to the cluster (leading half) and the one behind (trailing half). Considering all galaxies within the virial radius of the most massive groups and clusters of the simulation (M-halo > 10(13.8) [M-circle dot]), we find that on average the leading half presents an enhancement of the star formation rate with respect to the trailing half. We conclude that galaxies falling into the intra-cluster medium experience a boost in star-formation in their leading half due to ram pressure. Sparse observations of jellyfish galaxies have revealed visually the enhancement of the star formation in the leading half. In order to confirm this effect statistically using observations, different cases must be investigated using the simulation as a test dataset.

Original language	English
Journal	Galaxies
Volume	4
Issue number	4
DOIs	https://doi.org/10.3390/galaxies4040077
Publication status	Published - Dec 2016

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title = "Asymmetric Star Formation Efficiency Due to Ram Pressure Stripping",

abstract = "Previous works have shown that a dense cluster environment affects satellite galaxy properties and accelerates or truncates their evolutionary processes. In this work, we use the EAGLE simulation to study this effect, dissecting the galaxies in two halves: the one that is falling directly to the cluster (leading half) and the one behind (trailing half). Considering all galaxies within the virial radius of the most massive groups and clusters of the simulation (M-halo > 10(13.8) [M-circle dot]), we find that on average the leading half presents an enhancement of the star formation rate with respect to the trailing half. We conclude that galaxies falling into the intra-cluster medium experience a boost in star-formation in their leading half due to ram pressure. Sparse observations of jellyfish galaxies have revealed visually the enhancement of the star formation in the leading half. In order to confirm this effect statistically using observations, different cases must be investigated using the simulation as a test dataset.",

author = "{Troncoso Iribarren}, Paulina and Nelson Padilla and Sergio Contreras and Silvio Rodriguez and Diego Garc{\'i}a-Lambas and {Lagos Urbina}, Claudia",

year = "2016",

month = dec,

doi = "10.3390/galaxies4040077",

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TY - JOUR

T1 - Asymmetric Star Formation Efficiency Due to Ram Pressure Stripping

AU - Troncoso Iribarren, Paulina

AU - Padilla, Nelson

AU - Contreras, Sergio

AU - Rodriguez, Silvio

AU - García-Lambas, Diego

AU - Lagos Urbina, Claudia

PY - 2016/12

Y1 - 2016/12

N2 - Previous works have shown that a dense cluster environment affects satellite galaxy properties and accelerates or truncates their evolutionary processes. In this work, we use the EAGLE simulation to study this effect, dissecting the galaxies in two halves: the one that is falling directly to the cluster (leading half) and the one behind (trailing half). Considering all galaxies within the virial radius of the most massive groups and clusters of the simulation (M-halo > 10(13.8) [M-circle dot]), we find that on average the leading half presents an enhancement of the star formation rate with respect to the trailing half. We conclude that galaxies falling into the intra-cluster medium experience a boost in star-formation in their leading half due to ram pressure. Sparse observations of jellyfish galaxies have revealed visually the enhancement of the star formation in the leading half. In order to confirm this effect statistically using observations, different cases must be investigated using the simulation as a test dataset.

AB - Previous works have shown that a dense cluster environment affects satellite galaxy properties and accelerates or truncates their evolutionary processes. In this work, we use the EAGLE simulation to study this effect, dissecting the galaxies in two halves: the one that is falling directly to the cluster (leading half) and the one behind (trailing half). Considering all galaxies within the virial radius of the most massive groups and clusters of the simulation (M-halo > 10(13.8) [M-circle dot]), we find that on average the leading half presents an enhancement of the star formation rate with respect to the trailing half. We conclude that galaxies falling into the intra-cluster medium experience a boost in star-formation in their leading half due to ram pressure. Sparse observations of jellyfish galaxies have revealed visually the enhancement of the star formation in the leading half. In order to confirm this effect statistically using observations, different cases must be investigated using the simulation as a test dataset.

U2 - 10.3390/galaxies4040077

DO - 10.3390/galaxies4040077

M3 - Article

VL - 4

JO - Galaxies

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