Dissecting the main sequence: AGN activity and bulge growth in the local Universe

C. McPartland; D. B. Sanders; L. J. Kewley; S. K. Leslie

doi:10.1093/mnrasl/sly202

Dissecting the main sequence: AGN activity and bulge growth in the local Universe

C. McPartland, D. B. Sanders, L. J. Kewley, S. K. Leslie

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

15 Citations (Scopus)

Abstract

Local galaxies from the Sloan Digital Sky Survey (SDSS) are used to provide additional support for an evolutionary pathway in which active galactic nucleus activity is associated with star formation quenching. Composite, Seyfert 2, and LINER galaxies account for ∼60 per cent of all star formation in massive galaxies (M_a > 10^10.5 M_a). Inclusion of these galaxies results in a 'turnover' in the star formation rate and stellar mass (SFR-M_a) relation for massive galaxies. Our analysis shows that bulge growth has already occurred in the most massive galaxies (M_a > 10^10.5 M), and bulges continue to grow as galaxies quench and redden, (g - r) = 0.5 → 0.75. Significant bulge growth is also occurring in low mass starburst galaxies (M_a < 10^10.5 M) at 0.5 dex above the 'main sequence' (MS), where we find an increase in B/T from 0.1 → 0.3 and bluer colours, (g - r) < 0.25 compared to low-mass galaxies on the MS.

Original language	English
Pages (from-to)	L129-L133
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	482
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/sly202
Publication status	Published - 1 Jan 2019

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title = "Dissecting the main sequence: AGN activity and bulge growth in the local Universe",

abstract = "Local galaxies from the Sloan Digital Sky Survey (SDSS) are used to provide additional support for an evolutionary pathway in which active galactic nucleus activity is associated with star formation quenching. Composite, Seyfert 2, and LINER galaxies account for ∼60 per cent of all star formation in massive galaxies (Ma > 1010.5 Ma). Inclusion of these galaxies results in a 'turnover' in the star formation rate and stellar mass (SFR-Ma) relation for massive galaxies. Our analysis shows that bulge growth has already occurred in the most massive galaxies (Ma > 1010.5 M), and bulges continue to grow as galaxies quench and redden, (g - r) = 0.5 → 0.75. Significant bulge growth is also occurring in low mass starburst galaxies (Ma < 1010.5 M) at 0.5 dex above the 'main sequence' (MS), where we find an increase in B/T from 0.1 → 0.3 and bluer colours, (g - r) < 0.25 compared to low-mass galaxies on the MS.",

keywords = "galaxies: Seyfert, galaxies: active, galaxies: bulges, galaxies: evolution, galaxies: star-formation, galaxies: structure",

author = "C. McPartland and Sanders, {D. B.} and Kewley, {L. J.} and Leslie, {S. K.}",

note = "Publisher Copyright: {\textcopyright} 2019 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2019",

month = jan,

day = "1",

doi = "10.1093/mnrasl/sly202",

language = "English",

volume = "482",

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

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TY - JOUR

T1 - Dissecting the main sequence

T2 - AGN activity and bulge growth in the local Universe

AU - McPartland, C.

AU - Sanders, D. B.

AU - Kewley, L. J.

AU - Leslie, S. K.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Local galaxies from the Sloan Digital Sky Survey (SDSS) are used to provide additional support for an evolutionary pathway in which active galactic nucleus activity is associated with star formation quenching. Composite, Seyfert 2, and LINER galaxies account for ∼60 per cent of all star formation in massive galaxies (Ma > 1010.5 Ma). Inclusion of these galaxies results in a 'turnover' in the star formation rate and stellar mass (SFR-Ma) relation for massive galaxies. Our analysis shows that bulge growth has already occurred in the most massive galaxies (Ma > 1010.5 M), and bulges continue to grow as galaxies quench and redden, (g - r) = 0.5 → 0.75. Significant bulge growth is also occurring in low mass starburst galaxies (Ma < 1010.5 M) at 0.5 dex above the 'main sequence' (MS), where we find an increase in B/T from 0.1 → 0.3 and bluer colours, (g - r) < 0.25 compared to low-mass galaxies on the MS.

AB - Local galaxies from the Sloan Digital Sky Survey (SDSS) are used to provide additional support for an evolutionary pathway in which active galactic nucleus activity is associated with star formation quenching. Composite, Seyfert 2, and LINER galaxies account for ∼60 per cent of all star formation in massive galaxies (Ma > 1010.5 Ma). Inclusion of these galaxies results in a 'turnover' in the star formation rate and stellar mass (SFR-Ma) relation for massive galaxies. Our analysis shows that bulge growth has already occurred in the most massive galaxies (Ma > 1010.5 M), and bulges continue to grow as galaxies quench and redden, (g - r) = 0.5 → 0.75. Significant bulge growth is also occurring in low mass starburst galaxies (Ma < 1010.5 M) at 0.5 dex above the 'main sequence' (MS), where we find an increase in B/T from 0.1 → 0.3 and bluer colours, (g - r) < 0.25 compared to low-mass galaxies on the MS.

KW - galaxies: Seyfert

KW - galaxies: active

KW - galaxies: bulges

KW - galaxies: evolution

KW - galaxies: star-formation

KW - galaxies: structure

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U2 - 10.1093/mnrasl/sly202

DO - 10.1093/mnrasl/sly202

M3 - Article

SN - 1745-3925

VL - 482

SP - L129-L133

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

IS - 1

ER -

Dissecting the main sequence: AGN activity and bulge growth in the local Universe

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