The prevalence of type III disc breaks in HI-rich and low-spin galaxies

Jing Wang; Zheng Zheng; Richard D'Souza; Houjun Mo; Gyula Józsa; Cheng Li; Peter Kamphuis; Barbara Catinella; Li Shao; Claudia del P. Lagos; Min Du; Zhizheng Pan

doi:10.1093/mnras/sty1687

The prevalence of type III disc breaks in HI-rich and low-spin galaxies

Jing Wang, Zheng Zheng, Richard D'Souza, Houjun Mo, Gyula Józsa, Cheng Li, Peter Kamphuis, Barbara Catinella, Li Shao, Claudia del P. Lagos, Min Du, Zhizheng Pan

International Centre for Radio Astronomy Research (ICRAR)

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

10 Citations (Scopus)

Abstract

We investigate the origin of the type III (up-bending) discs based on a sample of 1808 galaxies from Sloan Digital Sky Survey and a sub-sample of 286 galaxies withHI data fromALFALFA. We examine how the type III fraction f_III, the fraction of disc galaxies which host up-bending disc breaks, depends on other galactic properties. We confirm that f_III strongly depends on the stellar concentration of galaxies. We find that HI-rich galaxies with low spins tend to have significantly more type III disc breaks than control galaxies, which are matched in concentration and stellar mass. This trend is independent of the existence of strong bars or environment of the galaxies. This result is broadly consistent with predictions from theoretical simulations, and indicates in situ star formation fuelled by gas accretion to be an important mechanism that builds the outer discs of type III galaxies.

Original language	English
Pages (from-to)	4292-4306
Number of pages	15
Journal	Monthly Notices of the Royal Astronomical Society
Volume	479
Issue number	4
DOIs	https://doi.org/10.1093/mnras/sty1687
Publication status	Published - 1 Oct 2018

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title = "The prevalence of type III disc breaks in HI-rich and low-spin galaxies",

abstract = "We investigate the origin of the type III (up-bending) discs based on a sample of 1808 galaxies from Sloan Digital Sky Survey and a sub-sample of 286 galaxies withHI data fromALFALFA. We examine how the type III fraction fIII, the fraction of disc galaxies which host up-bending disc breaks, depends on other galactic properties. We confirm that fIII strongly depends on the stellar concentration of galaxies. We find that HI-rich galaxies with low spins tend to have significantly more type III disc breaks than control galaxies, which are matched in concentration and stellar mass. This trend is independent of the existence of strong bars or environment of the galaxies. This result is broadly consistent with predictions from theoretical simulations, and indicates in situ star formation fuelled by gas accretion to be an important mechanism that builds the outer discs of type III galaxies.",

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author = "Jing Wang and Zheng Zheng and Richard D'Souza and Houjun Mo and Gyula J{\'o}zsa and Cheng Li and Peter Kamphuis and Barbara Catinella and Li Shao and Lagos, {Claudia del P.} and Min Du and Zhizheng Pan",

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TY - JOUR

T1 - The prevalence of type III disc breaks in HI-rich and low-spin galaxies

AU - Wang, Jing

AU - Zheng, Zheng

AU - D'Souza, Richard

AU - Mo, Houjun

AU - Józsa, Gyula

AU - Li, Cheng

AU - Kamphuis, Peter

AU - Catinella, Barbara

AU - Shao, Li

AU - Lagos, Claudia del P.

AU - Du, Min

AU - Pan, Zhizheng

PY - 2018/10/1

Y1 - 2018/10/1

N2 - We investigate the origin of the type III (up-bending) discs based on a sample of 1808 galaxies from Sloan Digital Sky Survey and a sub-sample of 286 galaxies withHI data fromALFALFA. We examine how the type III fraction fIII, the fraction of disc galaxies which host up-bending disc breaks, depends on other galactic properties. We confirm that fIII strongly depends on the stellar concentration of galaxies. We find that HI-rich galaxies with low spins tend to have significantly more type III disc breaks than control galaxies, which are matched in concentration and stellar mass. This trend is independent of the existence of strong bars or environment of the galaxies. This result is broadly consistent with predictions from theoretical simulations, and indicates in situ star formation fuelled by gas accretion to be an important mechanism that builds the outer discs of type III galaxies.

AB - We investigate the origin of the type III (up-bending) discs based on a sample of 1808 galaxies from Sloan Digital Sky Survey and a sub-sample of 286 galaxies withHI data fromALFALFA. We examine how the type III fraction fIII, the fraction of disc galaxies which host up-bending disc breaks, depends on other galactic properties. We confirm that fIII strongly depends on the stellar concentration of galaxies. We find that HI-rich galaxies with low spins tend to have significantly more type III disc breaks than control galaxies, which are matched in concentration and stellar mass. This trend is independent of the existence of strong bars or environment of the galaxies. This result is broadly consistent with predictions from theoretical simulations, and indicates in situ star formation fuelled by gas accretion to be an important mechanism that builds the outer discs of type III galaxies.

KW - Galaxies: photometry

KW - Galaxies: spiral

KW - Galaxies: structure

UR - http://www.scopus.com/inward/record.url?scp=85051524742&partnerID=8YFLogxK

U2 - 10.1093/mnras/sty1687

DO - 10.1093/mnras/sty1687

M3 - Article

AN - SCOPUS:85051524742

SN - 0035-8711

VL - 479

SP - 4292

EP - 4306

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

The prevalence of type III disc breaks in HI-rich and low-spin galaxies

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