ItemArticle

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

Title
Star-forming, rotating spheroidal galaxies in the GAMA and SAMI surveys
Creator
Moffett A.J.; Phillipps S.; Robotham A.S.G.; Driver S.P.; Bremer M.N.; Cortese L.; Wong O.I.; Brough S.; Brown M.J.I.; Bryant J.J.; Conselice C.J.; Croom S.M.; George K.; Goldstein G.; Goodwin M.; Holwerda B.W.; Hopkins A.M.; Konstantopoulos I.S.; Lawrence J.S.; Lorente N.P.F.; Medling A.M.; Owers M.S.; Pimbblet K.A.; Richards S.N.; Sweet S.M.; Van De Sande J.
Description
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 ?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 Ssic 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 display ordered rotation with the remainder displaying disturbed/non-ordered dynamics. Finally, we consider potential evolutionary scenarios for a population with this unusual combination of properties, concluding that LBSs are likely formed by a mixture of merger and accretion processes still recently active in low-redshift dwarf populations.We also infer that if LBS-like galaxies were subjected to quenching in a rich environment, they would plausibly resemble cluster dwarf ellipticals. 2019 The Author(s).
Source
Monthly Notices of the Royal Astronomical Society, Vol-489, No. 2, pp. 2830-2843.
Date
2019-01-01
Publisher
Oxford University Press
Subject
Galaxies: Dwarf; Galaxies: Fundamental parameters; Galaxies: Structure; Surveys
Coverage
Moffett A.J., Department of Physics and Astronomy, Vanderbilt University, 2401 Vanderbilt Place, Nashville, 37240, TN, United States, Department of Physics and Astronomy, University of North Georgia, 3820 Mundy Mill Rd., Oakwood, 30566, GA, United States; Phillipps S., School of Physics, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom; Robotham A.S.G., ICRAR, University OfWestern Australia, 35 Stirling Highway, Crawley, 6009, WA, Australia; Driver S.P., ICRAR, University OfWestern Australia, 35 Stirling Highway, Crawley, 6009, WA, Australia; Bremer M.N., School of Physics, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom; Cortese L., ICRAR, University OfWestern Australia, 35 Stirling Highway, Crawley, 6009, WA, Australia, ARC Centre of Excellence for All Sky Astrophysics in 3Dimensions (ASTRO 3D), University of New South Wales, 2052, NSW, Australia; Wong O.I., ICRAR, University OfWestern Australia, 35 Stirling Highway, Crawley, 6009, WA, Australia; Brough S., School of Physics, University of New South Wales, 2052, NSW, Australia; Brown M.J.I., School of Physics and Astronomy, Monash University, Monash, 3800, VIC, Australia; Bryant J.J., ARC Centre of Excellence for All Sky Astrophysics in 3Dimensions (ASTRO 3D), University of New South Wales, 2052, NSW, Australia, Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, 2006, NSW, Australia, Australian Astronomical Optics, 105 Delhi Rd, North Ryde, 2113, NSW, Australia; Conselice C.J., School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom; Croom S.M., ARC Centre of Excellence for All Sky Astrophysics in 3Dimensions (ASTRO 3D), University of New South Wales, 2052, NSW, Australia, School of Physics, University of New South Wales, 2052, NSW, Australia; George K., Indian Institute of Astrophysics, 2nd Block, Koramangala, Bangalore, 560034, India, Department of Physics, Christ University, Hosur Road, Bangalore, 560029, India; Goldstein G., Department of Physics and Astronomy, Macquarie University, Macquarie, 2109, NSW, Australia; Goodwin M., Australian Astronomical Optics, 105 Delhi Rd, North Ryde, 2113, NSW, Australia; Holwerda B.W., Department of Physics and Astronomy, University of Louisville, Louisville, 40292, KY, United States; Hopkins A.M., Australian Astronomical Optics, Macquarie University, 105 Delhi Rd, North Ryde, 2113, NSW, Australia; Konstantopoulos I.S., Atlassian, 341 George St Sydney, Sydney, 2000, NSW, Australia; Lawrence J.S., Australian Astronomical Optics, Macquarie University, 105 Delhi Rd, North Ryde, 2113, NSW, Australia; Lorente N.P.F., Australian Astronomical Optics, 105 Delhi Rd, North Ryde, 2113, NSW, Australia; Medling A.M., Ritter Astrophysical Research Center, University of Toledo, Toledo, 43606, OH, United States, Research School for Astronomy and Astrophysics, Australian National University, Canberra, 2611, ACT, Australia; Owers M.S., Department of Physics, Christ University, Hosur Road, Bangalore, 560029, India; Pimbblet K.A., E.A. Milne Centre for Astrophysics, University of Hull, Cottingham Road, Kingston-upon-Hull, HU6 7RX, United Kingdom; Richards S.N., SOFIA Science Center, USRA, NASA Ames Research Center, P.O. Box 1, Moffett Field, 94035-0001, CA, United States; Sweet S.M., ARC Centre of Excellence for All Sky Astrophysics in 3Dimensions (ASTRO 3D), University of New South Wales, 2052, NSW, Australia, Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, 3122, VIC, Australia; Van De Sande J., ARC Centre of Excellence for All Sky Astrophysics in 3Dimensions (ASTRO 3D), University of New South Wales, 2052, NSW, Australia, Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney, 2006, NSW, Australia
Rights
All Open Access; Bronze Open Access; Green Open Access
Relation
ISSN: 358711; CODEN: MNRAA
Format
Online
Language
English
Type
Article

Collection

Articles

Citation

Moffett A.J.; Phillipps S.; Robotham A.S.G.; Driver S.P.; Bremer M.N.; Cortese L.; Wong O.I.; Brough S.; Brown M.J.I.; Bryant J.J.; Conselice C.J.; Croom S.M.; George K.; Goldstein G.; Goodwin M.; Holwerda B.W.; Hopkins A.M.; Konstantopoulos I.S.; Lawrence J.S.; Lorente N.P.F.; Medling A.M.; Owers M.S.; Pimbblet K.A.; Richards S.N.; Sweet S.M.; Van De Sande J., “Star-forming, rotating spheroidal galaxies in the GAMA and SAMI surveys,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/16546.

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