Hostname: page-component-84b7d79bbc-l82ql Total loading time: 0 Render date: 2024-07-31T15:21:04.970Z Has data issue: false hasContentIssue false
  • English
  • Français

Gas accretion from halos to disks: observations, curiosities, and problems

Published online by Cambridge University Press:  09 May 2016

Bruce G. Elmegreen
Bruce G. Elmegreen*
Affiliation:
IBM T.J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY 10598, USA email: bge@us.ibm.com
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Accretion of gas from the cosmic web to galaxy halos and ultimately their disks is a prediction of modern cosmological models but is rarely observed directly or at the full rate expected from star formation. Here we illustrate possible large-scale cosmic HI accretion onto the nearby dwarf starburst galaxy IC10, observed with the VLA and GBT. We also suggest that cosmic accretion is the origin of sharp metallicity drops in the starburst regions of other dwarf galaxies, as observed with the 10-m GTC. Finally, we question the importance of cosmic accretion in normal dwarf irregulars, for which a recent study of their far-outer regions sees no need for, or evidence of, continuing gas buildup.

Keywords

accretiongalaxy formationstarburstsdwarf irregulars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 204 - 208
Copyright
Copyright © International Astronomical Union 2016 

References

Ashley, T., Elmegreen, B. G., Johnson, M., Nidever, D. L., Simpson, C. E., & Pokhrel, N. R. 2014, AJ, 148, 130Google Scholar
Bigiel, F., Leroy, A., Walter, F., Brinks, E., de Blok, W. J. G., Madore, B., Thornley, M. D. 2008, AJ, 136, 2846CrossRefGoogle Scholar
Bigiel, F.et al. 2011, ApJ, 730, L13Google Scholar
Ceverino, D., Sánchez Almeida, J., MuñozAAAATuñón, C., Dekel, A., Elmegreen, B. G., Elmegreen, D. M., & Primack, J. 2015, arXiv150902051CGoogle Scholar
Elmegreen, B.G. & Elmegreen, D.M.ApJ, 722, 1895Google Scholar
Elmegreen, D. M., Elmegreen, B. G., Sánchez Almeida, J., et al. 2012, ApJ, 750, 95Google Scholar
Elmegreen, B. G. & Hunter, D. A. 2015, ApJ, 805, 145CrossRefGoogle Scholar
Kennicutt, R. C. & Evans, N. J. 2012, ARA&A, 50, 531Google Scholar
Loose, H.-H. & Thuan, T. X. 1986, in Star-Forming Dwarf Galaxies and Related Objects, ed. Kunth, D., Thuan, T. X., & Vân, J. T. T., Gif-sur-Yvette: Edition Frontières, p.73Google Scholar
Morales-Luis, A. B., Sánchez Almeida, J., Aguerri, J. A. L., & Muñoz-Tuñón, C. 2011, ApJ, 743, 77CrossRefGoogle Scholar
Nidever, D. L., Ashley, T., & Slater, C. T., et al. 2013, ApJL, 779, L15Google Scholar
Noeske, K., Guseva, N., Frick, K., et al. 2000, A&A, 361, 33Google Scholar
Pérez-Montero, E. 2014, MNRAS, 441, 2663Google Scholar
Sánchez Almeida, J., Muñoz-Tuñón, C., Elmegreen, D. M., Elmegreen, B. G., & Méndez-Abreu, J. 2013, ApJ, 767, 74Google Scholar
Sánchez Almeida, J., Morales-Luis, A. B., Muñoz-Tuñón, C., Elmegreen, D. M., Elmegreen, B. G., & Méndez-Abreu, J. 2014, ApJ, 783, 45Google Scholar
Sánchez Almeida, J., Elmegreen, B. G., Muñoz-Tuñón, C., & Elmegreen, D. M. 2014, A&ARev, 22, 71Google Scholar
Sánchez Almeida, J., Elmegreen, B. G., Muñoz-Tuñón, C., Elmegreen, D. M., Pérez-Montero, E., Amorn, R., Filho, M. E., Ascasibar, Y., Papaderos, P., & Vlchez, J. M. 2015, ApJL, 810, L15Google Scholar
Verbeke, R., De Rijcke, S., Koleva, M., et al. 2014, MNRAS, 442, 1830Google Scholar