Details

Autor(en) / Beteiligte

• Cortese, L
• Fogarty, L. M. R
• Bekki, K
• van de Sande, J
• Couch, W
• Catinella, B
• Colless, M
• Obreschkow, D
• Taranu, D
• Tescari, E
• Barat, D
• Bland-Hawthorn, J
• Bloom, J
• Bryant, J. J
• Cluver, M
• Croom, S. M
• Drinkwater, M. J
• d'Eugenio, F
• Konstantopoulos, I. S
• Lopez-Sanchez, A
• Mahajan, S
• Scott, N
• Tonini, C
• Wong, O. I
• Allen, J. T
• Brough, S
• Goodwin, M
• Green, A. W
• Ho, I.-T
• Kelvin, L. S
• Lawrence, J. S
• Lorente, N. P. F
• Medling, A. M
• Owers, M. S
• Richards, S
• Sharp, R
• Sweet, S. M

Titel

The SAMI Galaxy Survey: the link between angular momentum and optical morphology

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2016-11, Vol.463 (1), p.170-184

Ort / Verlag

London: Oxford University Press

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We investigate the relationship between stellar and gas specific angular momentum j, stellar mass M * and optical morphology for a sample of 488 galaxies extracted from the Sydney-AAO Multi-object Integral field Galaxy Survey. We find that j, measured within one effective radius, monotonically increases with M * and that, for M * > 109.5 M⊙, the scatter in this relation strongly correlates with optical morphology (i.e. visual classification and Sérsic index). These findings confirm that massive galaxies of all types lie on a plane relating mass, angular momentum and stellar-light distribution, and suggest that the large-scale morphology of a galaxy is regulated by its mass and dynamical state. We show that the significant scatter in the M *-j relation is accounted for by the fact that, at fixed stellar mass, the contribution of ordered motions to the dynamical support of galaxies varies by at least a factor of 3. Indeed, the stellar spin parameter (quantified via λ R ) correlates strongly with Sérsic and concentration indices. This correlation is particularly strong once slow rotators are removed from the sample, showing that late-type galaxies and early-type fast rotators form a continuous class of objects in terms of their kinematic properties.