Journal article

THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES

L Cortese, LMR Fogarty, I-T Ho, K Bekki, J Bland-Hawthorn, M Colless, W Couch, SM Croom, K Glazebrook, J Mould, N Scott, R Sharp, C Tonini, JT Allen, J Bloom, JJ Bryant, M Cluver, RL Davies, MJ Drinkwater, M Goodwin Show all

ASTROPHYSICAL JOURNAL LETTERS | IOP PUBLISHING LTD | Published : 2014

Abstract

We take advantage of the first data from the Sydney-AAO Multi-object Integral field Galaxy Survey to investigate the relation between the kinematics of gas and stars, and stellar mass in a comprehensive sample of nearby galaxies. We find that all 235 objects in our sample, regardless of their morphology, lie on a tight relation linking stellar mass (M∗) to internal velocity quantified by the S0.5 parameter, which combines the contribution of both dispersion (σ) and rotational velocity (Vrot) to the dynamical support of a galaxy (S0.5 = √ 0.5 Vrot2 + σ2). Our results are independent of the baryonic component from which σ and V rot are estimated, as the S 0.5 of stars and gas agree remarkably ..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council


Awarded by Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)


Awarded by Science and Technology Facilities Council


Funding Acknowledgements

We thank the referee for a constructive report. L.C. acknowledges support from the Australian Research Council (DP130100664). I.S.K. is the recipient of a John Stocker Postdoctoral Fellowship from the Science and Industry Endowment Fund (Australia). The SAMI Galaxy Survey is based on observations made at the Anglo-Australian Telescope. The SAMI spectrograph was developed jointly by the University of Sydney and the Australian Astronomical Observatory. The SAMI input catalogue is based on data taken from the Sloan Digital Sky Survey, the GAMA Survey and the VST ATLAS Survey. The SAMI Galaxy Survey is funded by the Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO), through project number CE110001020, and other participating institutions.