dc.creator |
Gibson, Brad K. |
|
dc.creator |
Brook, C. B. |
|
dc.creator |
Stinson, G. |
|
dc.creator |
Roskar, R. |
|
dc.creator |
Wadsley, J. |
|
dc.creator |
Quinn, T. |
|
dc.date.accessioned |
2014-10-28T14:27:12Z |
|
dc.date.available |
2014-10-28T14:27:12Z |
|
dc.date.issued |
2012-01 |
|
dc.identifier.issn |
0035-8711 |
|
dc.identifier.issn |
1365-2966 |
|
dc.identifier.uri |
http://library2.smu.ca/xmlui/handle/01/25897 |
|
dc.description |
Publisher's version/PDF |
en_CA |
dc.description.abstract |
Within a fully cosmological hydrodynamical simulation, we form a galaxy which rotates at 140 km s[superscript −1], and it is characterized by two loose spiral arms and a bar, indicative of a Hubble-type SBc/d galaxy. We show that our simulated galaxy has no classical bulge, with a pure disc profile at z = 1, well after the major merging activity has ended. A long-lived bar subsequently forms, resulting in the formation of a secularly formed ‘pseudo-’bulge, with the final bulge-to-total light ratio of 0.21. We show that the majority of gas which loses angular momentum and falls to the central region of the galaxy during the merging epoch is blown back into the hot halo, with much of it returning later to form stars in the disc. We propose that this mechanism of redistribution of angular momentum via a galactic fountain, when coupled with the results from our previous study which showed why gas outflows are biased to have low angular momentum, can solve the angular momentum/bulgeless disc problem of the cold dark matter paradigm. |
en_CA |
dc.description.provenance |
Submitted by Janine Mills (janine.mills@smu.ca) on 2014-10-28T14:27:12Z
No. of bitstreams: 1
Gibson_Brad_K_article_2012c.pdf: 1278976 bytes, checksum: d170c828ee6a6dee4e78f54807e87ca7 (MD5) |
en |
dc.description.provenance |
Made available in DSpace on 2014-10-28T14:27:12Z (GMT). No. of bitstreams: 1
Gibson_Brad_K_article_2012c.pdf: 1278976 bytes, checksum: d170c828ee6a6dee4e78f54807e87ca7 (MD5)
Previous issue date: 2012-01 |
en |
dc.language.iso |
en |
en_CA |
dc.publisher |
Oxford University Press |
en_CA |
dc.relation.uri |
http://dx.doi.org/10.1111/j.1365-2966.2011.19740.x |
|
dc.rights |
Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user. |
|
dc.subject.lcsh |
Galactic bulges |
|
dc.subject.lcsh |
Galaxies -- Evolution |
|
dc.subject.lcsh |
Galaxies -- Formation |
|
dc.subject.lcsh |
Spiral galaxies |
|
dc.title |
Hierarchical formation of bulgeless galaxies – II. Redistribution of angular momentum via galactic fountains |
en_CA |
dc.type |
Text |
en_CA |
dcterms.bibliographicCitation |
Monthly Notices of the Royal Astronomical Society 419(1), 771-779. (2012) |
en_CA |
Copyright statement:
Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.