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On the Lack of Stellar Bars in Coma Dwarf Galaxies

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
J. Méndez-Abreu ,
R. Sánchez-Janssen  and
J.A.L. Aguerri
J. Méndez-Abreu
Affiliation:
Instituto de Astrofísica de Canarias, Calle Vía Láctea s/n, 38200 La Laguna, Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, 38205 La Laguna, Tenerife, Spain
R. Sánchez-Janssen
Affiliation:
European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile
J.A.L. Aguerri
Affiliation:
Instituto de Astrofísica de Canarias, Calle Vía Láctea s/n, 38200 La Laguna, Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, 38205 La Laguna, Tenerife, Spain
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Abstract

We present a study of the bar fraction in the Coma cluster galaxies based on a sample of ~190 galaxies selected from the SDSS-DR6 and observed with the Hubble Space Telescope (HST) Advanced Camera for Survey (ACS). We explore the presence of bars, detected by visual classification, throughout an unprecedented luminosity range of 9 mag (− 23 < Mr < −14). We find that bars are hosted by galaxies in a tight range of both luminosities (−22 < Mr < −17) and masses (109 < M∗/M⊙ < 1011). We find also that the bar fraction does not vary significantly with the distance to the cluster center, implying that cluster environment plays a second-order role in bar formation/evolution. The shape of the bar fraction distribution with respect to both luminosity and mass is well matched by the luminosity distribution of disk galaxies in Coma, indicating that bars are good tracers of cold stellar disks.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 305 - 306
Copyright
© EAS, EDP Sciences, 2011

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References

Aguerri, J.A.L., Méndez-Abreu, J., & Corsini, E.M., 2009, A&A, 495, 491A
Carter, D., et al, 2008, ApJS, 176, 424CrossRef
Méndez-Abreu, J., Sánchez-Janssen, R., & Aguerri, J.A.L., 2010, ApJ, 711L, 61MCrossRef
Sánchez-Janssen, R., Méndez-Abreu, J., & Aguerri, J.A.L., 2010, MNRAS, 406L, 65S