Galaxy and Mass Assembly (GAMA): the stellar mass budget of galaxy spheroids and discs

Amanda J. Moffett; Rebecca Lange; Simon P. Driver; Aaron S G Robotham; Lee S. Kelvin; Mehmet Alpaslan; Stephen K. Andrews; Joss Bland-Hawthorn; Sarah Brough; Michelle E. Cluver; Matthew Colless; Luke J. M. Davies; Benne W. Holwerda; Andrew M. Hopkins; Prajwal R. Kafle; Jochen Liske; Martin Meyer

doi:10.1093/mnras/stw1861

Galaxy and Mass Assembly (GAMA): the stellar mass budget of galaxy spheroids and discs

Amanda J. Moffett^*, Rebecca Lange, Simon P. Driver, Aaron S G Robotham, Lee S. Kelvin, Mehmet Alpaslan, Stephen K. Andrews, Joss Bland-Hawthorn, Sarah Brough, Michelle E. Cluver, Matthew Colless, Luke J. M. Davies, Benne W. Holwerda, Andrew M. Hopkins, Prajwal R. Kafle, Jochen Liske, Martin Meyer

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We build on a recent photometric decomposition analysis of 7506 Galaxy and Mass Assembly (GAMA) survey galaxies to derive stellar mass function fits to individual spheroid and disc component populations down to a lower mass limit of log(M_*/M_⊙) = 8. We find that the spheroid/disc mass distributions for individual galaxy morphological types are well described by single Schechter function forms. We derive estimates of the total stellar mass densities in spheroids (ρ_spheroid = 1.24 ± 0.49 × 10⁸ M_⊙ Mpc ^-3h_0.7) and discs (ρ_disc = 1.20 ± 0.45 × 10⁸ M_⊙ Mpc -3h_0.7), which translates to approximately 50 per cent of the local stellar mass density in spheroids and 48 per cent in discs. The remaining stellar mass is found in the dwarf 'little blue spheroid' class, which is not obviously similar in structure to either classical spheroid or disc populations. We also examine the variation of component mass ratios across galaxy mass and group halo mass regimes, finding the transition from spheroid to disc mass dominance occurs near galaxy stellar mass ~10¹¹ M_⊙ and group halo mass ~10^12.5 M_⊙h^-1. We further quantify the variation in spheroid-to-total mass ratio with group halo mass for central and satellite populations as well as the radial variation of this ratio within groups.

Original language	English
Pages (from-to)	4336-4348
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	462
Issue number	4
Early online date	30 Jul 2016
DOIs	https://doi.org/10.1093/mnras/stw1861
Publication status	Published - 11 Nov 2016

Keywords

Galaxies: elliptical and lenticular, cD
Galaxies: fundamental paramaters
Galaxies: luminosity function, mass function
Galaxies: spiral
Galaxies: statistics

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10.1093/mnras/stw1861

Driver_2016_MNRAS_GalaxySpheroids_FinalPubVersion
© 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1093/mnras/stw1861
Final published version, 3.45 MB

GAMA Data Release 2
Liske, J. (Creator), Baldry, I. K. (Creator), Driver, S. P. (Creator), Tuffs, R. J. (Creator), Alpaslan, M. (Creator), Andrae, E. (Creator), Brough, S. (Creator), Cluver, M. E. (Creator), Grootes, M. W. (Creator), Gunawardhana, M. L. P. (Creator), Kelvin, L. S. (Creator), Loveday, J. (Creator), Robotham, A. S. G. (Creator), Bamford, S. P. (Creator), Bland-Hawthorn, J. (Creator), Brown, M. J. I. (Creator), Drinkwater, M. J. (Creator), Hopkins, A. M. (Creator), Meyer, M. J. (Creator), Norberg, P. (Creator), Peacock, J. A. (Creator), Agius, N. K. (Creator), Andrews, S. K. (Creator), Bauer, A. E. (Creator), Ching, J. H. Y. (Creator), Colles, M. (Creator), Conselice, C. J. (Creator), Croom, S. M. (Creator), Davies, L. J. M. (Creator), De Propris, R. (Creator), Dunne, L. (Creator), Eardley, E. M. (Creator), Ellis, S. (Creator), Foster, C. (Creator), Frenk, C. S. (Creator), Haußler, B. (Creator), Holwerda, B. W. (Creator), Howlett, C. (Creator), Ibarra, H. (Creator), Jarvis, M. J. (Creator), Jones, D. H. (Creator), Kafle, P. R. (Creator), Lacey, C. G. (Creator), Lange, R. (Creator), Lara-Ĺopez, M. A. (Creator), López-Sánchez, Á. R. (Creator), Maddox, S. (Creator), Madore, B. F. (Creator), McNaught-Roberts, T. (Creator), Moffett, A. J. (Creator), Nichol, R. C. (Creator), Owers, M. S. (Creator), Palamara, D. (Creator), Penny, S. J. (Creator), Phillipps, S. (Creator), Pimbblet, K. A. (Creator), Popescu, C. C. (Creator), Prescott, M. (Creator), Proctor, R. (Creator), Sadler, E. M. (Creator), Sansom, A. E. (Creator), Seibert, M. (Creator), Sharp, R. (Creator), Sutherland, W. (Creator), Vazquez-Mata, J. A. (Creator), van Kampen, E. (Creator), Wilkins, S. M. (Creator), Williams, R. (Creator) & Wright, A. H. (Creator), Galaxy And Mass Assembly (GAMA), 11 Sept 2015
http://www.gama-survey.org/dr2/
Dataset

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Moffett, A. J., Lange, R., Driver, S. P., Robotham, A. S. G., Kelvin, L. S., Alpaslan, M., Andrews, S. K., Bland-Hawthorn, J., Brough, S., Cluver, M. E., Colless, M., Davies, L. J. M., Holwerda, B. W., Hopkins, A. M., Kafle, P. R., Liske, J., & Meyer, M. (2016). Galaxy and Mass Assembly (GAMA): the stellar mass budget of galaxy spheroids and discs. Monthly Notices of the Royal Astronomical Society, 462(4), 4336-4348. https://doi.org/10.1093/mnras/stw1861

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title = "Galaxy and Mass Assembly (GAMA): the stellar mass budget of galaxy spheroids and discs",

abstract = "We build on a recent photometric decomposition analysis of 7506 Galaxy and Mass Assembly (GAMA) survey galaxies to derive stellar mass function fits to individual spheroid and disc component populations down to a lower mass limit of log(M*/M⊙) = 8. We find that the spheroid/disc mass distributions for individual galaxy morphological types are well described by single Schechter function forms. We derive estimates of the total stellar mass densities in spheroids (ρspheroid = 1.24 ± 0.49 × 108 M⊙ Mpc -3h0.7) and discs (ρdisc = 1.20 ± 0.45 × 108 M⊙ Mpc -3h0.7), which translates to approximately 50 per cent of the local stellar mass density in spheroids and 48 per cent in discs. The remaining stellar mass is found in the dwarf 'little blue spheroid' class, which is not obviously similar in structure to either classical spheroid or disc populations. We also examine the variation of component mass ratios across galaxy mass and group halo mass regimes, finding the transition from spheroid to disc mass dominance occurs near galaxy stellar mass ~1011 M⊙ and group halo mass ~1012.5 M⊙h-1. We further quantify the variation in spheroid-to-total mass ratio with group halo mass for central and satellite populations as well as the radial variation of this ratio within groups.",

keywords = "Galaxies: elliptical and lenticular, cD, Galaxies: fundamental paramaters, Galaxies: luminosity function, mass function, Galaxies: spiral, Galaxies: statistics",

author = "Moffett, {Amanda J.} and Rebecca Lange and Driver, {Simon P.} and Robotham, {Aaron S G} and Kelvin, {Lee S.} and Mehmet Alpaslan and Andrews, {Stephen K.} and Joss Bland-Hawthorn and Sarah Brough and Cluver, {Michelle E.} and Matthew Colless and Davies, {Luke J. M.} and Holwerda, {Benne W.} and Hopkins, {Andrew M.} and Kafle, {Prajwal R.} and Jochen Liske and Martin Meyer",

year = "2016",

month = nov,

day = "11",

doi = "10.1093/mnras/stw1861",

language = "English",

volume = "462",

pages = "4336--4348",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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Moffett, AJ, Lange, R, Driver, SP, Robotham, ASG, Kelvin, LS, Alpaslan, M, Andrews, SK, Bland-Hawthorn, J, Brough, S, Cluver, ME, Colless, M, Davies, LJM, Holwerda, BW, Hopkins, AM, Kafle, PR, Liske, J & Meyer, M 2016, 'Galaxy and Mass Assembly (GAMA): the stellar mass budget of galaxy spheroids and discs', Monthly Notices of the Royal Astronomical Society, vol. 462, no. 4, pp. 4336-4348. https://doi.org/10.1093/mnras/stw1861

TY - JOUR

T1 - Galaxy and Mass Assembly (GAMA): the stellar mass budget of galaxy spheroids and discs

AU - Moffett, Amanda J.

AU - Lange, Rebecca

AU - Driver, Simon P.

AU - Robotham, Aaron S G

AU - Kelvin, Lee S.

AU - Alpaslan, Mehmet

AU - Andrews, Stephen K.

AU - Bland-Hawthorn, Joss

AU - Brough, Sarah

AU - Cluver, Michelle E.

AU - Colless, Matthew

AU - Davies, Luke J. M.

AU - Holwerda, Benne W.

AU - Hopkins, Andrew M.

AU - Kafle, Prajwal R.

AU - Liske, Jochen

AU - Meyer, Martin

PY - 2016/11/11

Y1 - 2016/11/11

N2 - We build on a recent photometric decomposition analysis of 7506 Galaxy and Mass Assembly (GAMA) survey galaxies to derive stellar mass function fits to individual spheroid and disc component populations down to a lower mass limit of log(M*/M⊙) = 8. We find that the spheroid/disc mass distributions for individual galaxy morphological types are well described by single Schechter function forms. We derive estimates of the total stellar mass densities in spheroids (ρspheroid = 1.24 ± 0.49 × 108 M⊙ Mpc -3h0.7) and discs (ρdisc = 1.20 ± 0.45 × 108 M⊙ Mpc -3h0.7), which translates to approximately 50 per cent of the local stellar mass density in spheroids and 48 per cent in discs. The remaining stellar mass is found in the dwarf 'little blue spheroid' class, which is not obviously similar in structure to either classical spheroid or disc populations. We also examine the variation of component mass ratios across galaxy mass and group halo mass regimes, finding the transition from spheroid to disc mass dominance occurs near galaxy stellar mass ~1011 M⊙ and group halo mass ~1012.5 M⊙h-1. We further quantify the variation in spheroid-to-total mass ratio with group halo mass for central and satellite populations as well as the radial variation of this ratio within groups.

AB - We build on a recent photometric decomposition analysis of 7506 Galaxy and Mass Assembly (GAMA) survey galaxies to derive stellar mass function fits to individual spheroid and disc component populations down to a lower mass limit of log(M*/M⊙) = 8. We find that the spheroid/disc mass distributions for individual galaxy morphological types are well described by single Schechter function forms. We derive estimates of the total stellar mass densities in spheroids (ρspheroid = 1.24 ± 0.49 × 108 M⊙ Mpc -3h0.7) and discs (ρdisc = 1.20 ± 0.45 × 108 M⊙ Mpc -3h0.7), which translates to approximately 50 per cent of the local stellar mass density in spheroids and 48 per cent in discs. The remaining stellar mass is found in the dwarf 'little blue spheroid' class, which is not obviously similar in structure to either classical spheroid or disc populations. We also examine the variation of component mass ratios across galaxy mass and group halo mass regimes, finding the transition from spheroid to disc mass dominance occurs near galaxy stellar mass ~1011 M⊙ and group halo mass ~1012.5 M⊙h-1. We further quantify the variation in spheroid-to-total mass ratio with group halo mass for central and satellite populations as well as the radial variation of this ratio within groups.

KW - Galaxies: elliptical and lenticular, cD

KW - Galaxies: fundamental paramaters

KW - Galaxies: luminosity function, mass function

KW - Galaxies: spiral

KW - Galaxies: statistics

U2 - 10.1093/mnras/stw1861

DO - 10.1093/mnras/stw1861

M3 - Article

AN - SCOPUS:84994519180

SN - 0035-8711

VL - 462

SP - 4336

EP - 4348

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Galaxy and Mass Assembly (GAMA): the stellar mass budget of galaxy spheroids and discs

Abstract

Keywords

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Datasets

GAMA Data Release 2

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