Non-linearity and environmental dependence of the star-forming galaxies main sequence

G. Erfanianfar, P. Popesso, A. Finoguenov, D. Wilman, S. Wuyts, A. Biviano, M. Salvato, M. Mirkazemi, L. Morselli, F. Ziparo, K. Nandra, D. Lutz, D. Elbaz, M. Dickinson, M. Tanaka, M. B. Altieri, H. Aussel, F. Bauer, S. Berta, R. M. Bielby & 13 others N. Brandt, Nico Cappelluti, A. Cimatti, M. C. Cooper, D. Fadda, O. Ilbert, E. Le Floch, B. Magnelli, J. S. Mulchaey, R. Nordon, J. A. Newman, A. Poglitsch, F. Pozzi

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Using data from four deep fields (COSMOS, AEGIS, ECDFS, and CDFN), we study the correlation between the position of galaxies in the star formation rate (SFR) versus stellar mass plane and local environment at z < 1.1. To accurately estimate the galaxy SFR, we use the deepest available Spitzer/MIPS 24 and Herschel/PACS data sets. We distinguish group environments (Mhalo ~ 1012.5-14.2M⊙) based on the available deep X-ray data and lower halo mass environments based on the local galaxy density.We confirm that the main sequence (MS) of star-forming galaxies is not a linear relation and there is a flattening towards higher stellar masses (M* > 1010.4-10.6 M⊙), across all environments. At high redshift (0.5 < z<1.1), the MS varies little with environment. At low redshift (0.15 < z < 0.5), group galaxies tend to deviate from the mean MS towards the region of quiescence with respect to isolated galaxies and less-dense environments. We find that the flattening of the MS towards low SFR is due to an increased fraction of bulge-dominated galaxies at high masses. Instead, the deviation of group galaxies from the MS at low redshift is caused by a large fraction of red disc-dominated galaxies which are not present in the lower density environments. Our results suggest that above a mass threshold (~1010.4-1010.6M⊙) stellar mass, morphology and environment act together in driving the evolution of the star formation activity towards lower level. The presence of a dominating bulge and the associated quenching processes are already in place beyond z ~1. The environmental effects appear, instead, at lower redshifts and have a long time-scale.

Original languageEnglish (US)
Pages (from-to)2839-2851
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Volume455
Issue number3
DOIs
StatePublished - Jan 1 2016
Externally publishedYes

Fingerprint

nonlinearity
galaxies
stars
galactic clusters
star formation rate
stellar mass
disk galaxies
flattening
environmental effect
star formation
quenching
timescale
deviation
thresholds
rate

Keywords

  • Galaxies: groups: general
  • Galaxies: haloes
  • Galaxies: star formation
  • Galaxy: evolution
  • Galaxy: structure
  • Infrared: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Erfanianfar, G., Popesso, P., Finoguenov, A., Wilman, D., Wuyts, S., Biviano, A., ... Pozzi, F. (2016). Non-linearity and environmental dependence of the star-forming galaxies main sequence. Monthly Notices of the Royal Astronomical Society, 455(3), 2839-2851. https://doi.org/10.1093/mnras/stv2485

Non-linearity and environmental dependence of the star-forming galaxies main sequence. / Erfanianfar, G.; Popesso, P.; Finoguenov, A.; Wilman, D.; Wuyts, S.; Biviano, A.; Salvato, M.; Mirkazemi, M.; Morselli, L.; Ziparo, F.; Nandra, K.; Lutz, D.; Elbaz, D.; Dickinson, M.; Tanaka, M.; Altieri, M. B.; Aussel, H.; Bauer, F.; Berta, S.; Bielby, R. M.; Brandt, N.; Cappelluti, Nico; Cimatti, A.; Cooper, M. C.; Fadda, D.; Ilbert, O.; Le Floch, E.; Magnelli, B.; Mulchaey, J. S.; Nordon, R.; Newman, J. A.; Poglitsch, A.; Pozzi, F.

In: Monthly Notices of the Royal Astronomical Society, Vol. 455, No. 3, 01.01.2016, p. 2839-2851.

Research output: Contribution to journalArticle

Erfanianfar, G, Popesso, P, Finoguenov, A, Wilman, D, Wuyts, S, Biviano, A, Salvato, M, Mirkazemi, M, Morselli, L, Ziparo, F, Nandra, K, Lutz, D, Elbaz, D, Dickinson, M, Tanaka, M, Altieri, MB, Aussel, H, Bauer, F, Berta, S, Bielby, RM, Brandt, N, Cappelluti, N, Cimatti, A, Cooper, MC, Fadda, D, Ilbert, O, Le Floch, E, Magnelli, B, Mulchaey, JS, Nordon, R, Newman, JA, Poglitsch, A & Pozzi, F 2016, 'Non-linearity and environmental dependence of the star-forming galaxies main sequence', Monthly Notices of the Royal Astronomical Society, vol. 455, no. 3, pp. 2839-2851. https://doi.org/10.1093/mnras/stv2485
Erfanianfar, G. ; Popesso, P. ; Finoguenov, A. ; Wilman, D. ; Wuyts, S. ; Biviano, A. ; Salvato, M. ; Mirkazemi, M. ; Morselli, L. ; Ziparo, F. ; Nandra, K. ; Lutz, D. ; Elbaz, D. ; Dickinson, M. ; Tanaka, M. ; Altieri, M. B. ; Aussel, H. ; Bauer, F. ; Berta, S. ; Bielby, R. M. ; Brandt, N. ; Cappelluti, Nico ; Cimatti, A. ; Cooper, M. C. ; Fadda, D. ; Ilbert, O. ; Le Floch, E. ; Magnelli, B. ; Mulchaey, J. S. ; Nordon, R. ; Newman, J. A. ; Poglitsch, A. ; Pozzi, F. / Non-linearity and environmental dependence of the star-forming galaxies main sequence. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 455, No. 3. pp. 2839-2851.
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AU - Wuyts, S.

AU - Biviano, A.

AU - Salvato, M.

AU - Mirkazemi, M.

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AU - Altieri, M. B.

AU - Aussel, H.

AU - Bauer, F.

AU - Berta, S.

AU - Bielby, R. M.

AU - Brandt, N.

AU - Cappelluti, Nico

AU - Cimatti, A.

AU - Cooper, M. C.

AU - Fadda, D.

AU - Ilbert, O.

AU - Le Floch, E.

AU - Magnelli, B.

AU - Mulchaey, J. S.

AU - Nordon, R.

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AU - Poglitsch, A.

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