Formation of S0 galaxies through mergers. Explaining angular momentum and concentration change from spirals to S0s

Bibcode
2015A&A...579L...2Q
DOI
10.1051/0004-6361/201526354
Querejeta, M.; Eliche-Moral, M. C.; Tapia, T.; Borlaff, A.; van de Ven, G.; Lyubenova, M.; Martig, M.; Falcón-Barroso, J.; Méndez-Abreu, J.
Bibliographical reference

Astronomy and Astrophysics, Volume 579, id.L2, 6 pp.

Advertised on:
7
2015
Journal
Astronomy and Astrophysics
Number of authors
9
IAC number of authors
2
Citations
65
Refereed citations
61
Description
The CALIFA team has recently found that the stellar angular momentum and concentration of late-type spiral galaxies are incompatible with those of lenticular galaxies (S0s), concluding that fading alone cannot satisfactorily explain the evolution from spirals into S0s. Here we explore whether major mergers can provide an alternative way to transform spirals into S0s by analysing the spiral-spiral major mergers from the GalMer database that lead to realistic, relaxed S0-like galaxies. We find that the change in stellar angular momentum and concentration can explain the differences in the λRe-R90/R50 plane found by the CALIFA team. Major mergers thus offer a feasible explanation for the transformation of spirals into S0s. Table 1 is available in electronic form at http://www.aanda.org
Related projects
Group members
Traces of Galaxy Formation: Stellar populations, Dynamics and Morphology
We are a large, diverse, and very active research group aiming to provide a comprehensive picture for the formation of galaxies in the Universe. Rooted in detailed stellar population analysis, we are constantly exploring and developing new tools and ideas to understand how galaxies came to be what we now observe.
Anna
Ferré Mateu
In progress
Type
Refereed
Galaxies

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