Star-forming, rotating spheroidal galaxies in the GAMA and SAMI surveys ...

• Main Authors: Moffett, Amanda J., Bryant, Julia J., Conselice, Christopher J., Croom, Scott M., George, Koshy, Goldstein, Greg, Goodwin, Michael, Holwerda, Benne W., Hopkins, Andrew M., Konstantopoulos, Iraklis S., Lawrence, Jon S., Phillipps, Steven, Lorente, Nuria P. F., Medling, Anne M., Owers, Matt S., Pimbblet, Kevin A., Richards, Samuel N., Sweet, Sarah, van de Sande, Jesse, Robotham, Aaron S. G., Driver, Simon P., Bremer, Malcolm N., Cortese, Luca, Wong, O. Ivy, Brough, Sarah, Brown, Michael J. I.
• Format: Text
• Language: unknown
• Published: Swinburne 2024
• Subjects: sami
• Online Access: https://dx.doi.org/10.25916/sut.26251847; https://swinburne.figshare.com/articles/journal_contribution/Star-forming_rotating_spheroidal_galaxies_in_the_GAMA_and_SAMI_surveys/26251847

The Galaxy And Mass Assembly (GAMA) survey has morphologically identified a class of 'Little Blue Spheroid' (LBS) galaxies whose relationship to other classes of galaxies we now examine in detail. Considering a sample of 868 LBSs, we find that such galaxies display similar but not identical colours, specific star formation rates, stellar population ages, massto-light ratios, and metallicities to Sd-Irr galaxies. We also find that LBSs typically occupy environments of even lower density than those of Sd-Irr galaxies, where similar to 65 per cent of LBS galaxies live in isolation. Using deep, high-resolution imaging from VST KiDS and the new Bayesian, 2D galaxy profile modelling code PROFIT, we further examine the detailed structure of LBSs and find that their S ' ersic indices, sizes, and axial ratios are compatible with those of low-mass elliptical galaxies. We then examine SAMI Galaxy survey integral field emission line kinematics for a subset of 62 LBSs and find that the majority (42) of these galaxies ...