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Title: THE NATURE AND NURTURE OF BARS AND DISKS

Abstract

The effects that interactions produce on galaxy disks and how they modify the subsequent formation of bars need to be distinguished to fully understand the relationship between bars and environment. To this aim we derive the bar fraction in three different environments ranging from the field to Virgo and Coma Clusters, covering an unprecedentedly large range of galaxy luminosities (or, equivalently, stellar masses). We confirm that the fraction of barred galaxies strongly depends on galaxy luminosity. We also show that the difference between the bar fraction distributions as a function of galaxy luminosity (and mass) in the field and Coma Cluster is statistically significant, with Virgo being an intermediate case. The fraction of barred galaxies shows a maximum of about 50% at M{sub r} {approx_equal} - 20.5 in clusters, whereas the peak is shifted to M{sub r} {approx_equal} - 19 in the field. We interpret this result as a variation of the effect of environment on bar formation depending on galaxy luminosity. We speculate that brighter disk galaxies are stable enough against interactions to keep their cold structure, thus, the interactions are able to trigger bar formation. For fainter galaxies, the interactions become strong enough to heat up the disksmore » inhibiting bar formation and even destroying the disks. Finally, we point out that the controversy regarding whether the bar fraction depends on environment could be resolved by taking into account the different luminosity ranges probed by the galaxy samples studied so far.« less

Authors:
; ;  [1];  [2];  [3]
  1. Instituto de Astrofisica de Canarias, Calle Via Lactea s/n, E-38200 La Laguna, Tenerife (Spain)
  2. European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago (Chile)
  3. Dipartimento di Fisica e Astronomia 'G. Galilei', Universita di Padova, vicolo dell'Osservatorio 3, I-35122 Padova (Italy)
Publication Date:
OSTI Identifier:
22078389
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 761; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; GALAXIES; GALAXY CLUSTERS; INTERACTIONS; LUMINOSITY; VARIATIONS

Citation Formats

Mendez-Abreu, J, Aguerri, J A. L., Zarattini, S, Sanchez-Janssen, R, and Corsini, E M. THE NATURE AND NURTURE OF BARS AND DISKS. United States: N. p., 2012. Web. doi:10.1088/2041-8205/761/1/L6.
Mendez-Abreu, J, Aguerri, J A. L., Zarattini, S, Sanchez-Janssen, R, & Corsini, E M. THE NATURE AND NURTURE OF BARS AND DISKS. United States. https://doi.org/10.1088/2041-8205/761/1/L6
Mendez-Abreu, J, Aguerri, J A. L., Zarattini, S, Sanchez-Janssen, R, and Corsini, E M. 2012. "THE NATURE AND NURTURE OF BARS AND DISKS". United States. https://doi.org/10.1088/2041-8205/761/1/L6.
@article{osti_22078389,
title = {THE NATURE AND NURTURE OF BARS AND DISKS},
author = {Mendez-Abreu, J and Aguerri, J A. L. and Zarattini, S and Sanchez-Janssen, R and Corsini, E M},
abstractNote = {The effects that interactions produce on galaxy disks and how they modify the subsequent formation of bars need to be distinguished to fully understand the relationship between bars and environment. To this aim we derive the bar fraction in three different environments ranging from the field to Virgo and Coma Clusters, covering an unprecedentedly large range of galaxy luminosities (or, equivalently, stellar masses). We confirm that the fraction of barred galaxies strongly depends on galaxy luminosity. We also show that the difference between the bar fraction distributions as a function of galaxy luminosity (and mass) in the field and Coma Cluster is statistically significant, with Virgo being an intermediate case. The fraction of barred galaxies shows a maximum of about 50% at M{sub r} {approx_equal} - 20.5 in clusters, whereas the peak is shifted to M{sub r} {approx_equal} - 19 in the field. We interpret this result as a variation of the effect of environment on bar formation depending on galaxy luminosity. We speculate that brighter disk galaxies are stable enough against interactions to keep their cold structure, thus, the interactions are able to trigger bar formation. For fainter galaxies, the interactions become strong enough to heat up the disks inhibiting bar formation and even destroying the disks. Finally, we point out that the controversy regarding whether the bar fraction depends on environment could be resolved by taking into account the different luminosity ranges probed by the galaxy samples studied so far.},
doi = {10.1088/2041-8205/761/1/L6},
url = {https://www.osti.gov/biblio/22078389}, journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 761,
place = {United States},
year = {Mon Dec 10 00:00:00 EST 2012},
month = {Mon Dec 10 00:00:00 EST 2012}
}