English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  The prevalence of pseudo-bulges in the Auriga simulations

Gargiulo, I. D., Monachesi, A., Gómez, F. A., Grand, R. J. J., Marinacci, F., Pakmor, R., et al. (2019). The prevalence of pseudo-bulges in the Auriga simulations. Monthly Notices of the Royal Astronomical Society, 489(4), 5742-5763. doi:10.1093/mnras/stz2536.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-4F82-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-4F83-F
Genre: Journal Article

Files

show Files
hide Files
:
The prevalence of pseudo-bulges in the Auriga simulations.pdf (Any fulltext), 6MB
 
File Permalink:
-
Name:
The prevalence of pseudo-bulges in the Auriga simulations.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Gargiulo, Ignacio D., Author
Monachesi, Antonela, Author
Gómez, Facundo A., Author
Grand, Robert J. J.1, Author              
Marinacci, Federico, Author
Pakmor, Rüdiger2, Author              
White, Simon D. M.3, Author              
Bell, Eric F., Author
Fragkoudi, Francesca3, Author              
Tissera, Patricia, Author
Affiliations:
1Galaxy Formation, Cosmology, MPI for Astrophysics, Max Planck Society, ou_159878              
2Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              
3Computational Structure Formation, MPI for Astrophysics, Max Planck Society, ou_2205642              

Content

show
hide
Free keywords: -
 Abstract: We study the galactic bulges in the Auriga simulations, a suite of 30 cosmological magneto-hydrodynamical zoom-in simulations of late-type galaxies in Milky Way sized dark matter haloes performed with the moving-mesh code arepo. We aim to characterize bulge formation mechanisms in this large suite of galaxies simulated at high resolution in a fully cosmological context. The bulges of the Auriga galaxies show a large variety in their shapes, sizes, and formation histories. According to observational classification criteria, such as Sérsic index and degree of ordered rotation, the majority of the Auriga bulges can be classified as pseudo-bulges, while some of them can be seen as composite bulges with a classical component; however, none can be classified as a classical bulge. Auriga bulges show mostly an in situ origin, 21 per cent of them with a negligible accreted fraction (facc < 0.01). In general, their in situ component was centrally formed, with ∼75 per cent of the bulges forming most of their stars inside the bulge region at z = 0. Part of their in situ mass growth is rapid and is associated with the effects of mergers, while another part is more secular in origin. In 90 per cent of the Auriga bulges, the accreted bulge component originates from less than four satellites. We investigate the relation between the accreted stellar haloes and the bulges of the Auriga simulations. The total bulge mass shows no correlation with the accreted stellar halo mass, as in observations. However, the accreted mass of bulges tends to correlate with their respective accreted stellar halo mass.

Details

show
hide
Language(s):
 Dates: 2019-09-11
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stz2536
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 489 (4) Sequence Number: - Start / End Page: 5742 - 5763 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150