The SFR-M Correlation Extends to Low Mass at High Redshift

Kartheik Iyer, Eric Gawiser, Romeel S Dave, Philip Davis, Steven L. Finkelstein, Dritan Kodra, Anton M. Koekemoer, Peter Kurczynski, Jeffery A. Newman, Camilla Pacifici, Rachel S. Somerville

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

To achieve a fuller understanding of galaxy evolution, SED fitting can be used to recover quantities beyond stellar masses (M ) and star formation rates (SFRs). We use star formation histories (SFHs) reconstructed via the Dense Basis method of Iyer & Gawiser for a sample of 17,873 galaxies at 0.5 < z < 6 in the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey GOODS-S field to study the nature and evolution of the SFR-M correlation. The reconstructed SFHs represent trajectories in SFR-M space, enabling us to study galaxies at epochs earlier than observed by propagating them backward in time along these trajectories. We study the SFR-M correlation at z = 1, 2, 3, 4, 5, 6 using both direct fits to galaxies observed at those epochs and SFR-M trajectories of galaxies observed at lower redshifts. The SFR-M correlations obtained using the two approaches are found to be consistent with each other through a K-S test. Validation tests using SFHs from semi-analytic models and cosmological hydrodynamical simulations confirm the sensitivity of the method to changes in the slope, normalization, and shape of the SFR-M correlation. This technique allows us to further probe the low-mass regime of the correlation at high z by ∼1 dex and over an effective volume of ∼10×larger than possible with just direct fits. We find that the SFR-M correlation is consistent with being linear down to M ∼ 106 M o at z > 4. The evolution of the correlation is well described by , where t univ is the age of the universe in Gyr.

Original languageEnglish (US)
Article number120
JournalAstrophysical Journal
Volume866
Issue number2
DOIs
StatePublished - Oct 20 2018
Externally publishedYes

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star formation rate
galaxies
stellar mass
star formation
universe
histories
history
rate
method

Keywords

  • galaxies: evolution
  • galaxies: star formation
  • techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Iyer, K., Gawiser, E., Dave, R. S., Davis, P., Finkelstein, S. L., Kodra, D., ... Somerville, R. S. (2018). The SFR-M Correlation Extends to Low Mass at High Redshift. Astrophysical Journal, 866(2), [120]. https://doi.org/10.3847/1538-4357/aae0fa

The SFR-M Correlation Extends to Low Mass at High Redshift. / Iyer, Kartheik; Gawiser, Eric; Dave, Romeel S; Davis, Philip; Finkelstein, Steven L.; Kodra, Dritan; Koekemoer, Anton M.; Kurczynski, Peter; Newman, Jeffery A.; Pacifici, Camilla; Somerville, Rachel S.

In: Astrophysical Journal, Vol. 866, No. 2, 120, 20.10.2018.

Research output: Contribution to journalArticle

Iyer, K, Gawiser, E, Dave, RS, Davis, P, Finkelstein, SL, Kodra, D, Koekemoer, AM, Kurczynski, P, Newman, JA, Pacifici, C & Somerville, RS 2018, 'The SFR-M Correlation Extends to Low Mass at High Redshift', Astrophysical Journal, vol. 866, no. 2, 120. https://doi.org/10.3847/1538-4357/aae0fa
Iyer K, Gawiser E, Dave RS, Davis P, Finkelstein SL, Kodra D et al. The SFR-M Correlation Extends to Low Mass at High Redshift. Astrophysical Journal. 2018 Oct 20;866(2). 120. https://doi.org/10.3847/1538-4357/aae0fa
Iyer, Kartheik ; Gawiser, Eric ; Dave, Romeel S ; Davis, Philip ; Finkelstein, Steven L. ; Kodra, Dritan ; Koekemoer, Anton M. ; Kurczynski, Peter ; Newman, Jeffery A. ; Pacifici, Camilla ; Somerville, Rachel S. / The SFR-M Correlation Extends to Low Mass at High Redshift. In: Astrophysical Journal. 2018 ; Vol. 866, No. 2.
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