Advanced search
1 file | 2.98 MB Add to list

The imprint of rapid star formation quenching on the spectral energy distributions of galaxies

Author
Organization
Abstract
In high density environments, the gas content of galaxies is stripped, leading to a rapid quenching of their star formation activity. This dramatic environmental effect, which is not related to typical passive evolution, is generally not taken into account in the star formation histories (SFHs) usually assumed to perform spectral energy distribution (SED) fitting of these galaxies, yielding a poor fit of their stellar emission and, consequently, biased estimate of the star formation rate (SFR). In this work, we aim at reproducing this rapid quenching using a truncated delayed SFH that we implemented in the SED fitting code CIGALE. We show that the ratio between the instantaneous SFR and the SFR just before the quenching (r(SFR)) is well constrained as long as rest-frame UV data are available. This SED modeling is applied to the Herschel Reference Survey (HRS) containing isolated galaxies and sources falling in the dense environment of the Virgo cluster. The latter are Hi-deficient because of ram pressure stripping. We show that the truncated delayed SFH successfully reproduces their SED, while typical SFH assumptions fail. A good correlation is found between rSFR and HI-def, the parameter that quantifies the gas deficiency of cluster galaxies, meaning that SED fitting results can be used to provide a tentative estimate of the gas deficiency of galaxies for which Hi observations are not available. The HRS galaxies are placed on the SFR-M-* diagram showing that the HI-deficient sources lie in the quiescent region, thus confirming previous studies. Using the rSFR parameter, we derive the SFR of these sources before quenching and show that they were previously on the main sequence relation. We show that the rSFR parameter is also recovered well for deeply obscured high redshift sources, as well as in the absence of IR data. SED fitting is thus a powerful tool for identifying galaxies that underwent a rapid star formation quenching.
Keywords
galaxies: fundamental parameters, galaxies: evolution, HERSCHEL REFERENCE SURVEY, ACTIVE GALACTIC NUCLEI, LYMAN BREAK GALAXIES, BAND-SELECTED SAMPLE, NEARBY GALAXIES, VIRGO CLUSTER, RED SEQUENCE, POPULATION SYNTHESIS, MAIN-SEQUENCE, STELLAR MASS

Downloads

  • Ciesla et al. 2016.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 2.98 MB

Citation

Please use this url to cite or link to this publication:

MLA
Ciesla, L et al. “The Imprint of Rapid Star Formation Quenching on the Spectral Energy Distributions of Galaxies.” ASTRONOMY & ASTROPHYSICS 585 (2016): n. pag. Print.
APA
Ciesla, L., Boselli, A., Elbaz, D., Boissier, S., Buat, V., Charmandaris, V., Schreiber, C., et al. (2016). The imprint of rapid star formation quenching on the spectral energy distributions of galaxies. ASTRONOMY & ASTROPHYSICS, 585.
Chicago author-date
Ciesla, L, A Boselli, D Elbaz, S Boissier, V Buat, V Charmandaris, C Schreiber, et al. 2016. “The Imprint of Rapid Star Formation Quenching on the Spectral Energy Distributions of Galaxies.” Astronomy & Astrophysics 585.
Chicago author-date (all authors)
Ciesla, L, A Boselli, D Elbaz, S Boissier, V Buat, V Charmandaris, C Schreiber, M Bethermin, Maarten Baes, M Boquien, Ilse De Looze, JA Fernandez-Ontiveros, C Pappalardo, L Spinoglio, and Sébastien Viaene. 2016. “The Imprint of Rapid Star Formation Quenching on the Spectral Energy Distributions of Galaxies.” Astronomy & Astrophysics 585.
Vancouver
1.
Ciesla L, Boselli A, Elbaz D, Boissier S, Buat V, Charmandaris V, et al. The imprint of rapid star formation quenching on the spectral energy distributions of galaxies. ASTRONOMY & ASTROPHYSICS. 2016;585.
IEEE
[1]
L. Ciesla et al., “The imprint of rapid star formation quenching on the spectral energy distributions of galaxies,” ASTRONOMY & ASTROPHYSICS, vol. 585, 2016.
@article{8096838,
  abstract     = {{In high density environments, the gas content of galaxies is stripped, leading to a rapid quenching of their star formation activity. This dramatic environmental effect, which is not related to typical passive evolution, is generally not taken into account in the star formation histories (SFHs) usually assumed to perform spectral energy distribution (SED) fitting of these galaxies, yielding a poor fit of their stellar emission and, consequently, biased estimate of the star formation rate (SFR). In this work, we aim at reproducing this rapid quenching using a truncated delayed SFH that we implemented in the SED fitting code CIGALE. We show that the ratio between the instantaneous SFR and the SFR just before the quenching (r(SFR)) is well constrained as long as rest-frame UV data are available. This SED modeling is applied to the Herschel Reference Survey (HRS) containing isolated galaxies and sources falling in the dense environment of the Virgo cluster. The latter are Hi-deficient because of ram pressure stripping. We show that the truncated delayed SFH successfully reproduces their SED, while typical SFH assumptions fail. A good correlation is found between rSFR and HI-def, the parameter that quantifies the gas deficiency of cluster galaxies, meaning that SED fitting results can be used to provide a tentative estimate of the gas deficiency of galaxies for which Hi observations are not available. The HRS galaxies are placed on the SFR-M-* diagram showing that the HI-deficient sources lie in the quiescent region, thus confirming previous studies. Using the rSFR parameter, we derive the SFR of these sources before quenching and show that they were previously on the main sequence relation. We show that the rSFR parameter is also recovered well for deeply obscured high redshift sources, as well as in the absence of IR data. SED fitting is thus a powerful tool for identifying galaxies that underwent a rapid star formation quenching.}},
  articleno    = {{A43}},
  author       = {{Ciesla, L and Boselli, A and Elbaz, D and Boissier, S and Buat, V and Charmandaris, V and Schreiber, C and Bethermin, M and Baes, Maarten and Boquien, M and De Looze, Ilse and Fernandez-Ontiveros, JA and Pappalardo, C and Spinoglio, L and Viaene, Sébastien}},
  issn         = {{1432-0746}},
  journal      = {{ASTRONOMY & ASTROPHYSICS}},
  keywords     = {{galaxies: fundamental parameters,galaxies: evolution,HERSCHEL REFERENCE SURVEY,ACTIVE GALACTIC NUCLEI,LYMAN BREAK GALAXIES,BAND-SELECTED SAMPLE,NEARBY GALAXIES,VIRGO CLUSTER,RED SEQUENCE,POPULATION SYNTHESIS,MAIN-SEQUENCE,STELLAR MASS}},
  language     = {{eng}},
  pages        = {{12}},
  title        = {{The imprint of rapid star formation quenching on the spectral energy distributions of galaxies}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/201527107}},
  volume       = {{585}},
  year         = {{2016}},
}

Altmetric
View in Altmetric
Web of Science
Times cited: