TY - JOUR
T1 - Deep extragalactic visible legacy survey (DEVILS)
T2 - Stellar mass growth by morphological type since z = 1
AU - Hashemizadeh, Abdolhosein
AU - Driver, Simon P.
AU - Davies, Luke J.M.
AU - Robotham, Aaron S.G.
AU - Bellstedt, Sabine
AU - Windhorst, Rogier A.
AU - Bremer, Malcolm
AU - Phillipps, Steven
AU - Jarvis, Matt
AU - Holwerda, Benne W.
AU - Lagos, Claudia Del P.
AU - Koushan, Soheil
AU - Siudek, Malgorzata
AU - Maddox, Natasha
AU - Thorne, Jessica E.
AU - Elahi, Pascal
N1 - Publisher Copyright:
© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
PY - 2021/7/1
Y1 - 2021/7/1
N2 - Using high-resolution Hubble Space Telescope imaging data, we perform a visual morphological classification of ~36 000 galaxies at z < 1 in the deep extragalactic visible legacy survey/cosmological evolution survey region. As the main goal of this study, we derive the stellar mass function (SMF) and stellar mass density (SMD) sub-divided by morphological types. We find that visual morphological classification using optical imaging is increasingly difficult at z > 1 as the fraction of irregular galaxies and merger systems (when observed at rest-frame UV/blue wavelengths) dramatically increases. We determine that roughly two-thirds of the total stellar mass of the Universe today was in place by z ~ 1. Double-component galaxies dominate the SMD at all epochs and increase in their contribution to the stellar mass budget to the present day. Elliptical galaxies are the second most dominant morphological type and increase their SMD by ~2.5 times, while by contrast, the pure-disc population significantly decreases by ~ 85 per cent. According to the evolution of both high- and low-mass ends of the SMF, we find that mergers and in situ evolution in discs are both present at z < 1, and conclude that double-component galaxies are predominantly being built by the in situ evolution in discs (apparent as the growth of the low-mass end with time), while mergers are likely responsible for the growth of ellipticals (apparent as the increase of intermediate/high-mass end).
AB - Using high-resolution Hubble Space Telescope imaging data, we perform a visual morphological classification of ~36 000 galaxies at z < 1 in the deep extragalactic visible legacy survey/cosmological evolution survey region. As the main goal of this study, we derive the stellar mass function (SMF) and stellar mass density (SMD) sub-divided by morphological types. We find that visual morphological classification using optical imaging is increasingly difficult at z > 1 as the fraction of irregular galaxies and merger systems (when observed at rest-frame UV/blue wavelengths) dramatically increases. We determine that roughly two-thirds of the total stellar mass of the Universe today was in place by z ~ 1. Double-component galaxies dominate the SMD at all epochs and increase in their contribution to the stellar mass budget to the present day. Elliptical galaxies are the second most dominant morphological type and increase their SMD by ~2.5 times, while by contrast, the pure-disc population significantly decreases by ~ 85 per cent. According to the evolution of both high- and low-mass ends of the SMF, we find that mergers and in situ evolution in discs are both present at z < 1, and conclude that double-component galaxies are predominantly being built by the in situ evolution in discs (apparent as the growth of the low-mass end with time), while mergers are likely responsible for the growth of ellipticals (apparent as the increase of intermediate/high-mass end).
KW - Galaxies: bulges
KW - Galaxies: disc
KW - Galaxies: elliptical and lenticular, cD
KW - Galaxies: evolution
KW - Galaxies: formation
KW - Galaxies: luminosity function, mass function
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U2 - 10.1093/mnras/stab600
DO - 10.1093/mnras/stab600
M3 - Article
AN - SCOPUS:85108144142
SN - 0035-8711
VL - 505
SP - 136
EP - 160
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -