Formation of S0 galaxies through mergers : explaining angular momentum and concentration change from spirals to S0s
Abstract
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.
Citation
Querejeta , M , Eliche-Moral , M C , Tapia , T , Borlaff , A , Van De Ven , G , Lyubenova , M , Martig , M , Falcón-Barroso , J & Mendez Abreu , J 2015 , ' Formation of S0 galaxies through mergers : explaining angular momentum and concentration change from spirals to S0s ' , Astronomy & Astrophysics , vol. 579 , L2 . https://doi.org/10.1051/0004-6361/201526354
Publication
Astronomy & Astrophysics
Status
Peer reviewed
ISSN
0004-6361Type
Journal article
Rights
Reproduced with permission from Astronomy & Astrophysics, © 2015 ESO
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