The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies

A. L. Schaefer; S. M. Croom; J. T. Allen; S. Brough; A. M. Medling; I. -T. Ho; N. Scott; S. N. Richards; M. B. Pracy; M. L. P. Gunawardhana; P. Norberg; M. Alpaslan; A. E. Bauer; K. Bekki; J. Bland-Hawthorn; J. V. Bloom; J. J. Bryant; W. J. Couch; S. P. Driver; L. M. R. Fogarty; C. Foster; G. Goldstein; A. W. Green; A. M. Hopkins; I. S. Konstantopoulos; J. S. Lawrence; A. R. López-Sánchez; N. P. F. Lorente; M. S. Owers; R. Sharp; S. M. Sweet; E. N. Taylor; J. van de Sande; C. J. Walcher; O. I. Wong

doi:10.1093/mnras/stw2289

The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies

A. L. Schaefer, S. M. Croom, J. T. Allen, S. Brough, A. M. Medling, I. -T. Ho, N. Scott, S. N. Richards, M. B. Pracy, M. L. P. Gunawardhana, P. Norberg, M. Alpaslan, A. E. Bauer, K. Bekki, J. Bland-Hawthorn, J. V. Bloom, J. J. Bryant, W. J. Couch, S. P. Driver, L. M. R. FogartyC. Foster, G. Goldstein, A. W. Green, A. M. Hopkins, I. S. Konstantopoulos, J. S. Lawrence, A. R. López-Sánchez, N. P. F. Lorente, M. S. Owers, R. Sharp, S. M. Sweet, E. N. Taylor, J. van de Sande, C. J. Walcher, O. I. Wong

School of Physics and Astronomy

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

Abstract

We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distribution of H α emission, we measure the radial profiles of star formation in a sample of 201 star-forming galaxies covering three orders of magnitude in stellar mass (M∗;10^8.1 –10^10.95 M⊙ ) and in fifth nearest neighbour local environment density (Σ₅;10^−1.3 –10^2.1 Mpc⁻² ). We show that star formation rate gradients in galaxies are steeper in dense (log₁₀(Σ₅/Mpc²) > 0.5) environments by 0.58 ± 0 . 29 dex r_e⁻¹ in galaxies with stellar masses in the range 10¹⁰< M∗ / M⊙ < 10¹¹ and that this steepening is accompanied by a reduction in the integrated star formation rate. However, for any given stellar mass or environment density, the star formation morphology of galaxies shows large scatter. We also measure the degree to which the star formation is centrally concentrated using the unitless scale-radius ratio (r_50,Hα/r_50,cont), which compares the extent of ongoing star formation to previous star formation. With this metric, we find that the fraction of galaxies with centrally concentrated star formation increases with environment density, from ∼ 5 ± 4 per cent in low-density environments (log₁₀(Σ₅/Mpc²) < 0.0) to 30 ± 15 per cent in the highest density environments (log₁₀(Σ₅/Mpc ²) > 1.0). These lines of evidence strongly suggest that with increasing local environment density, the star formation in galaxies is suppressed, and that this starts in their outskirts such that quenching occurs in an outside-in fashion in dense environments and is not instantaneous.

Original language	English
Pages (from-to)	121-142
Journal	Monthly Notices of the Royal Astronomical Society
Volume	464
Issue number	1
Early online date	12 Sept 2016
DOIs	https://doi.org/10.1093/mnras/stw2289
Publication status	Published - Jan 2017

Keywords

Galaxies: evolution
Galaxies: general
Galaxies: interactions
Galaxies: statistics
Galaxies: stellar content
Galaxies: structure

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10.1093/mnras/stw2289

Schaefer-2016-SAMI-MNRAS-121
© 2016, the Author(s). This work has been 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://doi.org/10.1093/mnras/stw2289
Final published version, 5.27 MB

http://arxiv.org/abs/1609.02635v1

SAMI Galaxy Survey
Bryant, J. J. (Creator), Owers, M. S. (Creator), Robotham, A. S. G. (Creator), Croom, S. M. (Creator), Driver, S. P. (Creator), Drinkwater, M. J. (Creator), Lorente, N. P. F. (Creator), Cortese, L. (Creator), Scott, N. (Creator), Colless, M. (Creator), Schaefer, A. (Creator), Taylor, E. N. (Creator), Konstantopoulos, I. S. (Creator), Allen, J. T. (Creator), Baldry, I. (Creator), Barnes, L. (Creator), Bauer, A. E. (Creator), Bland-Hawthorn, J. (Creator), Bloom, J. V. (Creator), Brooks, A. M. (Creator), Brough, S. (Creator), Cecil, G. (Creator), Couch, W. (Creator), Croton, D. (Creator), Davies, R. (Creator), Ellis, S. (Creator), Fogarty, L. M. R. (Creator), Foster, C. (Creator), Glazebrook, K. (Creator), Goodwin, M. (Creator), Green, A. (Creator), Gunawardhana, M. L. (Creator), Hampton, E. (Creator), Ho, I.-T. (Creator), Hopkins, A. M. (Creator), Kewley, L. (Creator), Lawrence, J. S. (Creator), Leon-Saval, S. G. (Creator), Leslie, S. (Creator), McElroy, R. (Creator), Lewis, G. (Creator), Liske, J. (Creator), Lopez-Sanchez, A. R. (Creator), Mahajan, S. (Creator), Medling, A. M. (Creator), Metcalfe, N. (Creator), Meyer, M. (Creator), Mould, J. (Creator), Obreschkow, D. (Creator), O'Toole, S. (Creator), Pracy, M. (Creator), Richards, S. N. (Creator), Shanks, T. (Creator), Sharp, R. (Creator), Sweet, S. M. (Creator), Thomas, A. D. (Creator), Tonini, C. (Creator) & Walcher, C. J. (Creator), SAMI Survey Team, 1 Mar 2015
https://sami-survey.org/ and one more link, https://datacentral.aao.gov.au/asvo/surveys/sami/ (show fewer)
Dataset

Cite this

Schaefer, A. L., Croom, S. M., Allen, J. T., Brough, S., Medling, A. M., Ho, I. .-T., Scott, N., Richards, S. N., Pracy, M. B., Gunawardhana, M. L. P., Norberg, P., Alpaslan, M., Bauer, A. E., Bekki, K., Bland-Hawthorn, J., Bloom, J. V., Bryant, J. J., Couch, W. J., Driver, S. P., ... Wong, O. I. (2017). The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies. Monthly Notices of the Royal Astronomical Society, 464(1), 121-142. https://doi.org/10.1093/mnras/stw2289

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title = "The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies",

abstract = "We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distribution of H α emission, we measure the radial profiles of star formation in a sample of 201 star-forming galaxies covering three orders of magnitude in stellar mass (M∗;108.1 –1010.95 M⊙ ) and in fifth nearest neighbour local environment density (Σ5;10−1.3 –102.1 Mpc−2 ). We show that star formation rate gradients in galaxies are steeper in dense (log10(Σ5/Mpc2) > 0.5) environments by 0.58 ± 0 . 29 dex re−1 in galaxies with stellar masses in the range 1010 < M∗ / M⊙ < 1011 and that this steepening is accompanied by a reduction in the integrated star formation rate. However, for any given stellar mass or environment density, the star formation morphology of galaxies shows large scatter. We also measure the degree to which the star formation is centrally concentrated using the unitless scale-radius ratio (r50,Hα/r50,cont), which compares the extent of ongoing star formation to previous star formation. With this metric, we find that the fraction of galaxies with centrally concentrated star formation increases with environment density, from ∼ 5 ± 4 per cent in low-density environments (log10(Σ5/Mpc2) < 0.0) to 30 ± 15 per cent in the highest density environments (log10(Σ5/Mpc 2) > 1.0). These lines of evidence strongly suggest that with increasing local environment density, the star formation in galaxies is suppressed, and that this starts in their outskirts such that quenching occurs in an outside-in fashion in dense environments and is not instantaneous.",

keywords = "Galaxies: evolution, Galaxies: general, Galaxies: interactions, Galaxies: statistics, Galaxies: stellar content, Galaxies: structure",

author = "Schaefer, {A. L.} and Croom, {S. M.} and Allen, {J. T.} and S. Brough and Medling, {A. M.} and Ho, {I. -T.} and N. Scott and Richards, {S. N.} and Pracy, {M. B.} and Gunawardhana, {M. L. P.} and P. Norberg and M. Alpaslan and Bauer, {A. E.} and K. Bekki and J. Bland-Hawthorn and Bloom, {J. V.} and Bryant, {J. J.} and Couch, {W. J.} and Driver, {S. P.} and Fogarty, {L. M. R.} and C. Foster and G. Goldstein and Green, {A. W.} and Hopkins, {A. M.} and Konstantopoulos, {I. S.} and Lawrence, {J. S.} and L{\'o}pez-S{\'a}nchez, {A. R.} and Lorente, {N. P. F.} and Owers, {M. S.} and R. Sharp and Sweet, {S. M.} and Taylor, {E. N.} and Sande, {J. van de} and Walcher, {C. J.} and Wong, {O. I.}",

year = "2017",

month = jan,

doi = "10.1093/mnras/stw2289",

language = "English",

volume = "464",

pages = "121--142",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

}

Schaefer, AL, Croom, SM, Allen, JT, Brough, S, Medling, AM, Ho, I-T, Scott, N, Richards, SN, Pracy, MB, Gunawardhana, MLP, Norberg, P, Alpaslan, M, Bauer, AE, Bekki, K, Bland-Hawthorn, J, Bloom, JV, Bryant, JJ, Couch, WJ, Driver, SP, Fogarty, LMR, Foster, C, Goldstein, G, Green, AW, Hopkins, AM, Konstantopoulos, IS, Lawrence, JS, López-Sánchez, AR, Lorente, NPF, Owers, MS, Sharp, R, Sweet, SM, Taylor, EN, Sande, JVD, Walcher, CJ & Wong, OI 2017, 'The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies', Monthly Notices of the Royal Astronomical Society, vol. 464, no. 1, pp. 121-142. https://doi.org/10.1093/mnras/stw2289

TY - JOUR

T1 - The SAMI Galaxy Survey

T2 - spatially resolving the environmental quenching of star formation in GAMA galaxies

AU - Schaefer, A. L.

AU - Croom, S. M.

AU - Allen, J. T.

AU - Brough, S.

AU - Medling, A. M.

AU - Ho, I. -T.

AU - Scott, N.

AU - Richards, S. N.

AU - Pracy, M. B.

AU - Gunawardhana, M. L. P.

AU - Norberg, P.

AU - Alpaslan, M.

AU - Bauer, A. E.

AU - Bekki, K.

AU - Bland-Hawthorn, J.

AU - Bloom, J. V.

AU - Bryant, J. J.

AU - Couch, W. J.

AU - Driver, S. P.

AU - Fogarty, L. M. R.

AU - Foster, C.

AU - Goldstein, G.

AU - Green, A. W.

AU - Hopkins, A. M.

AU - Konstantopoulos, I. S.

AU - Lawrence, J. S.

AU - López-Sánchez, A. R.

AU - Lorente, N. P. F.

AU - Owers, M. S.

AU - Sharp, R.

AU - Sweet, S. M.

AU - Taylor, E. N.

AU - Sande, J. van de

AU - Walcher, C. J.

AU - Wong, O. I.

PY - 2017/1

Y1 - 2017/1

N2 - We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distribution of H α emission, we measure the radial profiles of star formation in a sample of 201 star-forming galaxies covering three orders of magnitude in stellar mass (M∗;108.1 –1010.95 M⊙ ) and in fifth nearest neighbour local environment density (Σ5;10−1.3 –102.1 Mpc−2 ). We show that star formation rate gradients in galaxies are steeper in dense (log10(Σ5/Mpc2) > 0.5) environments by 0.58 ± 0 . 29 dex re−1 in galaxies with stellar masses in the range 1010 < M∗ / M⊙ < 1011 and that this steepening is accompanied by a reduction in the integrated star formation rate. However, for any given stellar mass or environment density, the star formation morphology of galaxies shows large scatter. We also measure the degree to which the star formation is centrally concentrated using the unitless scale-radius ratio (r50,Hα/r50,cont), which compares the extent of ongoing star formation to previous star formation. With this metric, we find that the fraction of galaxies with centrally concentrated star formation increases with environment density, from ∼ 5 ± 4 per cent in low-density environments (log10(Σ5/Mpc2) < 0.0) to 30 ± 15 per cent in the highest density environments (log10(Σ5/Mpc 2) > 1.0). These lines of evidence strongly suggest that with increasing local environment density, the star formation in galaxies is suppressed, and that this starts in their outskirts such that quenching occurs in an outside-in fashion in dense environments and is not instantaneous.

AB - We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distribution of H α emission, we measure the radial profiles of star formation in a sample of 201 star-forming galaxies covering three orders of magnitude in stellar mass (M∗;108.1 –1010.95 M⊙ ) and in fifth nearest neighbour local environment density (Σ5;10−1.3 –102.1 Mpc−2 ). We show that star formation rate gradients in galaxies are steeper in dense (log10(Σ5/Mpc2) > 0.5) environments by 0.58 ± 0 . 29 dex re−1 in galaxies with stellar masses in the range 1010 < M∗ / M⊙ < 1011 and that this steepening is accompanied by a reduction in the integrated star formation rate. However, for any given stellar mass or environment density, the star formation morphology of galaxies shows large scatter. We also measure the degree to which the star formation is centrally concentrated using the unitless scale-radius ratio (r50,Hα/r50,cont), which compares the extent of ongoing star formation to previous star formation. With this metric, we find that the fraction of galaxies with centrally concentrated star formation increases with environment density, from ∼ 5 ± 4 per cent in low-density environments (log10(Σ5/Mpc2) < 0.0) to 30 ± 15 per cent in the highest density environments (log10(Σ5/Mpc 2) > 1.0). These lines of evidence strongly suggest that with increasing local environment density, the star formation in galaxies is suppressed, and that this starts in their outskirts such that quenching occurs in an outside-in fashion in dense environments and is not instantaneous.

KW - Galaxies: evolution

KW - Galaxies: general

KW - Galaxies: interactions

KW - Galaxies: statistics

KW - Galaxies: stellar content

KW - Galaxies: structure

U2 - 10.1093/mnras/stw2289

DO - 10.1093/mnras/stw2289

M3 - Article

SN - 0035-8711

VL - 464

SP - 121

EP - 142

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

The SAMI Galaxy Survey: spatially resolving the environmental quenching of star formation in GAMA galaxies

Abstract

Keywords

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SAMI Galaxy Survey

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