Home > Research > Publications & Outputs > Star formation histories of z~1 galaxies in LEGA-C

Associated organisational unit

Electronic data

  • sfh_legac_apj_r2

    Rights statement: This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal 861,1. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.3847/1538-4357/aac324

    Accepted author manuscript, 1.55 MB, PDF document

Links

Text available via DOI:

View graph of relations

Star formation histories of z~1 galaxies in LEGA-C

Research output: Contribution to journalJournal article

Published

Standard

Star formation histories of z~1 galaxies in LEGA-C. / Chauke, Priscilla; Wel, Arjen van der; Pacifici, Camilla; Bezanson, Rachel; Wu, Po-Feng; Gallazzi, Anna; Noeske, Kai; Straatman, Caroline; Munoz-Mateos, J. C.; Franx, Marijn; Barisic, Ivana; Bell, Eric F.; Brammer, Gabriel; Calhau, Joao; Houdt, Josha van; Labbé, Ivo; Maseda, Michael V.; Muzzin, Adam; Rix, Hans-Walter; Sobral, David.

In: The Astrophysical Journal, Vol. 861, No. 1, 13, 01.07.2018.

Research output: Contribution to journalJournal article

Harvard

Chauke, P, Wel, AVD, Pacifici, C, Bezanson, R, Wu, P-F, Gallazzi, A, Noeske, K, Straatman, C, Munoz-Mateos, JC, Franx, M, Barisic, I, Bell, EF, Brammer, G, Calhau, J, Houdt, JV, Labbé, I, Maseda, MV, Muzzin, A, Rix, H-W & Sobral, D 2018, 'Star formation histories of z~1 galaxies in LEGA-C', The Astrophysical Journal, vol. 861, no. 1, 13. https://doi.org/10.3847/1538-4357/aac324

APA

Chauke, P., Wel, A. V. D., Pacifici, C., Bezanson, R., Wu, P-F., Gallazzi, A., Noeske, K., Straatman, C., Munoz-Mateos, J. C., Franx, M., Barisic, I., Bell, E. F., Brammer, G., Calhau, J., Houdt, J. V., Labbé, I., Maseda, M. V., Muzzin, A., Rix, H-W., & Sobral, D. (2018). Star formation histories of z~1 galaxies in LEGA-C. The Astrophysical Journal, 861(1), [13]. https://doi.org/10.3847/1538-4357/aac324

Vancouver

Chauke P, Wel AVD, Pacifici C, Bezanson R, Wu P-F, Gallazzi A et al. Star formation histories of z~1 galaxies in LEGA-C. The Astrophysical Journal. 2018 Jul 1;861(1). 13. https://doi.org/10.3847/1538-4357/aac324

Author

Chauke, Priscilla ; Wel, Arjen van der ; Pacifici, Camilla ; Bezanson, Rachel ; Wu, Po-Feng ; Gallazzi, Anna ; Noeske, Kai ; Straatman, Caroline ; Munoz-Mateos, J. C. ; Franx, Marijn ; Barisic, Ivana ; Bell, Eric F. ; Brammer, Gabriel ; Calhau, Joao ; Houdt, Josha van ; Labbé, Ivo ; Maseda, Michael V. ; Muzzin, Adam ; Rix, Hans-Walter ; Sobral, David. / Star formation histories of z~1 galaxies in LEGA-C. In: The Astrophysical Journal. 2018 ; Vol. 861, No. 1.

Bibtex

@article{7f4b2c8b5d314463a512db7a59f1c96b,
title = "Star formation histories of z~1 galaxies in LEGA-C",
abstract = "Using high resolution spectra from the VLT LEGA-C program, we reconstruct the star formation histories (SFHs) of 607 galaxies at redshifts z = 0.6 − 1.0 and stellar masses 10^10 M⊙ using a custom full spectrum fitting algorithm that incorporates the emcee and FSPS packages. We show that the mass-weighted age of a galaxy correlates strongly with stellar velocity dispersion (σ∗) and ongoing star-formation (SF) activity, with the stellar content in higher-σ∗ galaxies having formed earlier and faster. The SFHs of quiescent galaxies are generally consistent with passive evolution since their main SF epoch, but a minority show clear evidence of a rejuvenation event in their recent past. The mean age of stars in galaxies that are star-forming is generally significantly younger, with SF peaking after z < 1.5 for almost all star-forming galaxies in the sample: many of these still have either constant or rising SFRs on timescales > 100 Myrs. This indicates that z > 2 progenitors of z ∼ 1 star-forming galaxies are generally far less massive. Finally, despite considerable variance in the individual SFHs, we show that the current SF activity of massive galaxies (> L∗ ) at z ∼ 1 correlates with SF levels at least 3 Gyrs prior: SFHs retain {\textquoteleft}memory{\textquoteright} on a large fraction of the Hubble time. Our results illustrate a novel approach to resolve the formation phase of galaxies, and in identifying their individual evolutionary paths, connects progenitors and descendants across cosmic time. This is uniquely enabled by the high-quality continuum spectroscopy provided by the LEGA-C survey.",
author = "Priscilla Chauke and Wel, {Arjen van der} and Camilla Pacifici and Rachel Bezanson and Po-Feng Wu and Anna Gallazzi and Kai Noeske and Caroline Straatman and Munoz-Mateos, {J. C.} and Marijn Franx and Ivana Barisic and Bell, {Eric F.} and Gabriel Brammer and Joao Calhau and Houdt, {Josha van} and Ivo Labb{\'e} and Maseda, {Michael V.} and Adam Muzzin and Hans-Walter Rix and David Sobral",
note = "This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.3847/1538-4357/aac324",
year = "2018",
month = jul
day = "1",
doi = "10.3847/1538-4357/aac324",
language = "English",
volume = "861",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - Star formation histories of z~1 galaxies in LEGA-C

AU - Chauke, Priscilla

AU - Wel, Arjen van der

AU - Pacifici, Camilla

AU - Bezanson, Rachel

AU - Wu, Po-Feng

AU - Gallazzi, Anna

AU - Noeske, Kai

AU - Straatman, Caroline

AU - Munoz-Mateos, J. C.

AU - Franx, Marijn

AU - Barisic, Ivana

AU - Bell, Eric F.

AU - Brammer, Gabriel

AU - Calhau, Joao

AU - Houdt, Josha van

AU - Labbé, Ivo

AU - Maseda, Michael V.

AU - Muzzin, Adam

AU - Rix, Hans-Walter

AU - Sobral, David

N1 - This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.3847/1538-4357/aac324

PY - 2018/7/1

Y1 - 2018/7/1

N2 - Using high resolution spectra from the VLT LEGA-C program, we reconstruct the star formation histories (SFHs) of 607 galaxies at redshifts z = 0.6 − 1.0 and stellar masses 10^10 M⊙ using a custom full spectrum fitting algorithm that incorporates the emcee and FSPS packages. We show that the mass-weighted age of a galaxy correlates strongly with stellar velocity dispersion (σ∗) and ongoing star-formation (SF) activity, with the stellar content in higher-σ∗ galaxies having formed earlier and faster. The SFHs of quiescent galaxies are generally consistent with passive evolution since their main SF epoch, but a minority show clear evidence of a rejuvenation event in their recent past. The mean age of stars in galaxies that are star-forming is generally significantly younger, with SF peaking after z < 1.5 for almost all star-forming galaxies in the sample: many of these still have either constant or rising SFRs on timescales > 100 Myrs. This indicates that z > 2 progenitors of z ∼ 1 star-forming galaxies are generally far less massive. Finally, despite considerable variance in the individual SFHs, we show that the current SF activity of massive galaxies (> L∗ ) at z ∼ 1 correlates with SF levels at least 3 Gyrs prior: SFHs retain ‘memory’ on a large fraction of the Hubble time. Our results illustrate a novel approach to resolve the formation phase of galaxies, and in identifying their individual evolutionary paths, connects progenitors and descendants across cosmic time. This is uniquely enabled by the high-quality continuum spectroscopy provided by the LEGA-C survey.

AB - Using high resolution spectra from the VLT LEGA-C program, we reconstruct the star formation histories (SFHs) of 607 galaxies at redshifts z = 0.6 − 1.0 and stellar masses 10^10 M⊙ using a custom full spectrum fitting algorithm that incorporates the emcee and FSPS packages. We show that the mass-weighted age of a galaxy correlates strongly with stellar velocity dispersion (σ∗) and ongoing star-formation (SF) activity, with the stellar content in higher-σ∗ galaxies having formed earlier and faster. The SFHs of quiescent galaxies are generally consistent with passive evolution since their main SF epoch, but a minority show clear evidence of a rejuvenation event in their recent past. The mean age of stars in galaxies that are star-forming is generally significantly younger, with SF peaking after z < 1.5 for almost all star-forming galaxies in the sample: many of these still have either constant or rising SFRs on timescales > 100 Myrs. This indicates that z > 2 progenitors of z ∼ 1 star-forming galaxies are generally far less massive. Finally, despite considerable variance in the individual SFHs, we show that the current SF activity of massive galaxies (> L∗ ) at z ∼ 1 correlates with SF levels at least 3 Gyrs prior: SFHs retain ‘memory’ on a large fraction of the Hubble time. Our results illustrate a novel approach to resolve the formation phase of galaxies, and in identifying their individual evolutionary paths, connects progenitors and descendants across cosmic time. This is uniquely enabled by the high-quality continuum spectroscopy provided by the LEGA-C survey.

U2 - 10.3847/1538-4357/aac324

DO - 10.3847/1538-4357/aac324

M3 - Journal article

VL - 861

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 13

ER -