Angular Momentum across the Hubble sequence from the CALIFA survey

Abstract

We investigate the stellar angular momentum of galaxies across the Hubble sequence from the CALIFA survey. The distribution of CALIFA elliptical and lenticular galaxies in the ${\lambda }_{\mathrm{Re}}-{\epsilon }_{\mathrm{e}}$ diagram is consistent with that shown by the Atlas${}^{3D}$ survey. Our data, however, show that the location of spiral galaxies in this diagram is significantly different. We have found two families of spiral galaxies with particularly peculiar properties: (a) spiral galaxies with much higher ${\lambda }_{\mathrm{Re}}$ values than any elliptical and lenticular galaxy; (b) low-mass spiral galaxies with observed ${\lambda }_{\mathrm{Re}}$ values much lower than expected for their apparent flattening. We use these two families of objects to argue that (1) fading alone cannot explain the transformation of spiral to lenticular galaxies, and (2) that those low-mass spiral galaxies are in fact dark matter dominated, which explains the unusually low angular momentum.

4 pages, 3 figures; to appear in the proceedings of the IAUs311 "Galaxy Masses as Constraints of Formation Models" held in July 2014 in Oxford (UK)

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• Reconstructing the Subsurface Three-Dimensional Magnetic Structure of A Solar Active Region Using SDO/HMI Observations

Cited by in corpus (6)

• The SAMI Galaxy Survey: the link between angular momentum and optical morphology
• Stellar kinematics across the Hubble sequence in the CALIFA survey: General properties and aperture corrections
• The CALIFA view on stellar angular momentum across the Hubble sequence
• The origin and properties of massive prolate galaxies in the Illustris simulation
• On the accretion of a new group of galaxies onto Virgo: I. Internal kinematics of nine in-falling dEs
• From Peculiar Morphologies to Hubble-type Spirals: The relation between galaxy dynamics and morphology in star-forming galaxies at z~1.5