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Faint features in the isolated galaxy CIG96

Published online by Cambridge University Press:  21 March 2017

P. Ramírez-Moreta
Affiliation:
Insituto de Astrofísica de Andalucía IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
L. Verdes-Montenegro
Affiliation:
Insituto de Astrofísica de Andalucía IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
S. Leon
Affiliation:
Insituto de Astrofísica de Andalucía IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
J. Blasco-Herrera
Affiliation:
Insituto de Astrofísica de Andalucía IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
M. Fernández-Lorenzo
Affiliation:
Insituto de Astrofísica de Andalucía IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
M. Yun
Affiliation:
Insituto de Astrofísica de Andalucía IAA-CSIC, Glorieta de la Astronomía s/n, 18008 Granada, Spain
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Extract

The AMIGA project carries out a multiwavelength study of the largest catalogue of isolated galaxies from the Local Universe (CIG, Karachentseva 1973). Compared to any other sample —field galaxies included— and using highly strict isolation criteria (unperturbed for at least ~3 Gyr, Verdes-Montenegro et al. 2005), all the results show that these galaxies have the lowest values of the physical magnitudes expected to be enhanced by interactions. This strongly supports isolated galaxies as ideal laboratories for the study of galaxy formation and evolution. Despite CIG galaxies show the lowest HI integrated profile asymmetry level when compared to any other sample, some cases present up to 50% HI asymmetry (Espada et al. 2011b). We aim to shed light over the causes and sources of such asymmetries with our deep radiointerferometric and optical observations of CIG targets. Since major mergers are ruled out by the isolation criteria, in this work we are addressing whether minor mergers, internal processes or primordial gas accretion are responsible for such asymmetries.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2017 

References

Espada, D., Bosma, A., Verdes-Montenegro, L., et al. 2005, A&A 442 455 Google Scholar
Espada, D., Muñoz-Mateos, J. C., Gil de Paz, A., et al. 2011a, ApJ 736 20 CrossRefGoogle Scholar
Espada, D., Verdes-Montenegro, L., Huchtmeier, W. K., et al. 2011b, A&A 532 A117 Google Scholar
Karachentseva, V. E. 1973, Astrofizicheskie Issledovaniia Izvestiya Spetsial'noj Astrofizicheskoj Observatorii, 8, 3 Google Scholar
Verdes-Montenegro, L., Sulentic, J., Lisenfeld, U., et al. 2005, A&A 436 443 Google Scholar

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