The SAMI Galaxy Survey: spatially resolving the main sequence of star formation

Anne M. Medling; Luca Cortese; Scott M. Croom; Andrew W. Green; Brent Groves; Elise Hampton; I-Ting Ho; Luke J. M. Davies; Lisa J. Kewley; Amanda J. Moffett; Adam L. Schaefer; Edward Taylor; Tayyaba Zafar; Kenji Bekki; Joss Bland-Hawthorn; Jessica V. Bloom; Sarah Brough; Julia J. Bryant; Barbara Catinella; Gerald Cecil; Matthew Colless; Warrick J. Couch; Michael J. Drinkwater; Simon P. Driver; Christoph Federrath; Caroline Foster; Gregory Goldstein; Michael Goodwin; Andrew Hopkins; J. S. Lawrence; Sarah K. Leslie; Geraint F. Lewis; Nuria P. F. Lorente; Matt S. Owers; Richard McDermid; Samuel N. Richards; Robert Sharp; Nicholas Scott; Sarah M. Sweet; Dan S. Taranu; Edoardo Tescari; Chiara Tonini; Jesse van de Sande; C. Jakob Walcher; Angus Wright

doi:10.1093/mnras/sty127

The SAMI Galaxy Survey: spatially resolving the main sequence of star formation

Anne M. Medling, Luca Cortese, Scott M. Croom, Andrew W. Green, Brent Groves, Elise Hampton, I-Ting Ho, Luke J. M. Davies, Lisa J. Kewley, Amanda J. Moffett, Adam L. Schaefer, Edward Taylor, Tayyaba Zafar, Kenji Bekki, Joss Bland-Hawthorn, Jessica V. Bloom, Sarah Brough, Julia J. Bryant, Barbara Catinella, Gerald CecilMatthew Colless, Warrick J. Couch, Michael J. Drinkwater, Simon P. Driver, Christoph Federrath, Caroline Foster, Gregory Goldstein, Michael Goodwin, Andrew Hopkins, J. S. Lawrence, Sarah K. Leslie, Geraint F. Lewis, Nuria P. F. Lorente, Matt S. Owers, Richard McDermid, Samuel N. Richards, Robert Sharp, Nicholas Scott, Sarah M. Sweet, Dan S. Taranu, Edoardo Tescari, Chiara Tonini, Jesse van de Sande, C. Jakob Walcher, Angus Wright

School of Physics and Astronomy

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

Abstract

We present the ∼800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on H α emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by non-stellar emission using the [O iii]/H β, [N ii]/H α, [S ii]/H α, and [O i]/H α line ratios. Using these maps, we examine the global and resolved star-forming main sequences of SAMI galaxies as a function of morphology, environmental density, and stellar mass. Galaxies further below the star-forming main sequence are more likely to have flatter star formation profiles. Early-type galaxies split into two populations with similar stellar masses and central stellar mass surface densities. The main-sequence population has centrally concentrated star formation similar to late-type galaxies, while galaxies >3σ below the main sequence show significantly reduced star formation most strikingly in the nuclear regions. The split populations support a two-step quenching mechanism, wherein halo mass first cuts off the gas supply and remaining gas continues to form stars until the local stellar mass surface density can stabilize the reduced remaining fuel against further star formation. Across all morphologies, galaxies in denser environments show a decreased specific star formation rate from the outside in, supporting an environmental cause for quenching, such as ram-pressure stripping or galaxy interactions.

Original language	English
Pages (from-to)	5194-5214
Journal	Monthly Notices of the Royal Astronomical Society
Volume	475
Issue number	4
Early online date	16 Jan 2018
DOIs	https://doi.org/10.1093/mnras/sty127
Publication status	Published - 21 Apr 2018

Keywords

Surveys
Galaxies: evolution
Galaxies: star formation

Access to Document

10.1093/mnras/sty127

Medling-2018-SAMI-Galaxy-MNRAS-5194
© 2018, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1093/mnras/sty127
Final published version, 4.66 MB

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

Medling, A. M., Cortese, L., Croom, S. M., Green, A. W., Groves, B., Hampton, E., Ho, I.-T., Davies, L. J. M., Kewley, L. J., Moffett, A. J., Schaefer, A. L., Taylor, E., Zafar, T., Bekki, K., Bland-Hawthorn, J., Bloom, J. V., Brough, S., Bryant, J. J., Catinella, B., ... Wright, A. (2018). The SAMI Galaxy Survey: spatially resolving the main sequence of star formation. Monthly Notices of the Royal Astronomical Society, 475(4), 5194-5214. https://doi.org/10.1093/mnras/sty127

@article{2b75a9e6380b4092a92644180573a7f7,

title = "The SAMI Galaxy Survey: spatially resolving the main sequence of star formation",

abstract = "We present the ∼800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on H α emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by non-stellar emission using the [O iii]/H β, [N ii]/H α, [S ii]/H α, and [O i]/H α line ratios. Using these maps, we examine the global and resolved star-forming main sequences of SAMI galaxies as a function of morphology, environmental density, and stellar mass. Galaxies further below the star-forming main sequence are more likely to have flatter star formation profiles. Early-type galaxies split into two populations with similar stellar masses and central stellar mass surface densities. The main-sequence population has centrally concentrated star formation similar to late-type galaxies, while galaxies >3σ below the main sequence show significantly reduced star formation most strikingly in the nuclear regions. The split populations support a two-step quenching mechanism, wherein halo mass first cuts off the gas supply and remaining gas continues to form stars until the local stellar mass surface density can stabilize the reduced remaining fuel against further star formation. Across all morphologies, galaxies in denser environments show a decreased specific star formation rate from the outside in, supporting an environmental cause for quenching, such as ram-pressure stripping or galaxy interactions.",

keywords = "Surveys, Galaxies: evolution, Galaxies: star formation",

author = "Medling, {Anne M.} and Luca Cortese and Croom, {Scott M.} and Green, {Andrew W.} and Brent Groves and Elise Hampton and I-Ting Ho and Davies, {Luke J. M.} and Kewley, {Lisa J.} and Moffett, {Amanda J.} and Schaefer, {Adam L.} and Edward Taylor and Tayyaba Zafar and Kenji Bekki and Joss Bland-Hawthorn and Bloom, {Jessica V.} and Sarah Brough and Bryant, {Julia J.} and Barbara Catinella and Gerald Cecil and Matthew Colless and Couch, {Warrick J.} and Drinkwater, {Michael J.} and Driver, {Simon P.} and Christoph Federrath and Caroline Foster and Gregory Goldstein and Michael Goodwin and Andrew Hopkins and Lawrence, {J. S.} and Leslie, {Sarah K.} and Lewis, {Geraint F.} and Lorente, {Nuria P. F.} and Owers, {Matt S.} and Richard McDermid and Richards, {Samuel N.} and Robert Sharp and Nicholas Scott and Sweet, {Sarah M.} and Taranu, {Dan S.} and Edoardo Tescari and Chiara Tonini and Sande, {Jesse van de} and Walcher, {C. Jakob} and Angus Wright",

year = "2018",

month = apr,

day = "21",

doi = "10.1093/mnras/sty127",

language = "English",

volume = "475",

pages = "5194--5214",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

}

Medling, AM, Cortese, L, Croom, SM, Green, AW, Groves, B, Hampton, E, Ho, I-T, Davies, LJM, Kewley, LJ, Moffett, AJ, Schaefer, AL, Taylor, E, Zafar, T, Bekki, K, Bland-Hawthorn, J, Bloom, JV, Brough, S, Bryant, JJ, Catinella, B, Cecil, G, Colless, M, Couch, WJ, Drinkwater, MJ, Driver, SP, Federrath, C, Foster, C, Goldstein, G, Goodwin, M, Hopkins, A, Lawrence, JS, Leslie, SK, Lewis, GF, Lorente, NPF, Owers, MS, McDermid, R, Richards, SN, Sharp, R, Scott, N, Sweet, SM, Taranu, DS, Tescari, E, Tonini, C, Sande, JVD, Walcher, CJ & Wright, A 2018, 'The SAMI Galaxy Survey: spatially resolving the main sequence of star formation', Monthly Notices of the Royal Astronomical Society, vol. 475, no. 4, pp. 5194-5214. https://doi.org/10.1093/mnras/sty127

TY - JOUR

T1 - The SAMI Galaxy Survey

T2 - spatially resolving the main sequence of star formation

AU - Medling, Anne M.

AU - Cortese, Luca

AU - Croom, Scott M.

AU - Green, Andrew W.

AU - Groves, Brent

AU - Hampton, Elise

AU - Ho, I-Ting

AU - Davies, Luke J. M.

AU - Kewley, Lisa J.

AU - Moffett, Amanda J.

AU - Schaefer, Adam L.

AU - Taylor, Edward

AU - Zafar, Tayyaba

AU - Bekki, Kenji

AU - Bland-Hawthorn, Joss

AU - Bloom, Jessica V.

AU - Brough, Sarah

AU - Bryant, Julia J.

AU - Catinella, Barbara

AU - Cecil, Gerald

AU - Colless, Matthew

AU - Couch, Warrick J.

AU - Drinkwater, Michael J.

AU - Driver, Simon P.

AU - Federrath, Christoph

AU - Foster, Caroline

AU - Goldstein, Gregory

AU - Goodwin, Michael

AU - Hopkins, Andrew

AU - Lawrence, J. S.

AU - Leslie, Sarah K.

AU - Lewis, Geraint F.

AU - Lorente, Nuria P. F.

AU - Owers, Matt S.

AU - McDermid, Richard

AU - Richards, Samuel N.

AU - Sharp, Robert

AU - Scott, Nicholas

AU - Sweet, Sarah M.

AU - Taranu, Dan S.

AU - Tescari, Edoardo

AU - Tonini, Chiara

AU - Sande, Jesse van de

AU - Walcher, C. Jakob

AU - Wright, Angus

PY - 2018/4/21

Y1 - 2018/4/21

N2 - We present the ∼800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on H α emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by non-stellar emission using the [O iii]/H β, [N ii]/H α, [S ii]/H α, and [O i]/H α line ratios. Using these maps, we examine the global and resolved star-forming main sequences of SAMI galaxies as a function of morphology, environmental density, and stellar mass. Galaxies further below the star-forming main sequence are more likely to have flatter star formation profiles. Early-type galaxies split into two populations with similar stellar masses and central stellar mass surface densities. The main-sequence population has centrally concentrated star formation similar to late-type galaxies, while galaxies >3σ below the main sequence show significantly reduced star formation most strikingly in the nuclear regions. The split populations support a two-step quenching mechanism, wherein halo mass first cuts off the gas supply and remaining gas continues to form stars until the local stellar mass surface density can stabilize the reduced remaining fuel against further star formation. Across all morphologies, galaxies in denser environments show a decreased specific star formation rate from the outside in, supporting an environmental cause for quenching, such as ram-pressure stripping or galaxy interactions.

AB - We present the ∼800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on H α emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by non-stellar emission using the [O iii]/H β, [N ii]/H α, [S ii]/H α, and [O i]/H α line ratios. Using these maps, we examine the global and resolved star-forming main sequences of SAMI galaxies as a function of morphology, environmental density, and stellar mass. Galaxies further below the star-forming main sequence are more likely to have flatter star formation profiles. Early-type galaxies split into two populations with similar stellar masses and central stellar mass surface densities. The main-sequence population has centrally concentrated star formation similar to late-type galaxies, while galaxies >3σ below the main sequence show significantly reduced star formation most strikingly in the nuclear regions. The split populations support a two-step quenching mechanism, wherein halo mass first cuts off the gas supply and remaining gas continues to form stars until the local stellar mass surface density can stabilize the reduced remaining fuel against further star formation. Across all morphologies, galaxies in denser environments show a decreased specific star formation rate from the outside in, supporting an environmental cause for quenching, such as ram-pressure stripping or galaxy interactions.

KW - Surveys

KW - Galaxies: evolution

KW - Galaxies: star formation

U2 - 10.1093/mnras/sty127

DO - 10.1093/mnras/sty127

M3 - Article

SN - 0035-8711

VL - 475

SP - 5194

EP - 5214

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

The SAMI Galaxy Survey: spatially resolving the main sequence of star formation

Abstract

Keywords

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SAMI Galaxy Survey

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