- Main
EVOLUTION OF INTRINSIC SCATTER IN THE SFR-STELLAR MASS CORRELATION AT 0.5 < z < 3
- Author(s): Kurczynski, Peter
- Gawiser, Eric
- Acquaviva, Viviana
- Bell, Eric F
- Dekel, Avishai
- de Mello, Duilia F
- Ferguson, Henry C
- Gardner, Jonathan P
- Grogin, Norman A
- Guo, Yicheng
- Hopkins, Philip F
- Koekemoer, Anton M
- Koo, David C
- Lee, Seong-Kook
- Mobasher, Bahram
- Primack, Joel R
- Rafelski, Marc
- Soto, Emmaris
- Teplitz, Harry I
- et al.
Published Web Location
https://doi.org/10.3847/2041-8205/820/1/L1Abstract
We present estimates of intrinsic scatter in the Star Formation Rate (SFR) - Stellar Mass (M*) correlation in the redshift range 0.5 < z < 3.0 and in the mass range 10^7 < M* < 10^11 Msun. We utilize photometry in the Hubble Ultradeep Field (HUDF12), Ultraviolet Ultra Deep Field (UVUDF) campaigns and CANDELS/GOODS-S. We estimate SFR, M* from broadband Spectral Energy Distributions (SEDs) and the best available redshifts. The maximum depth of the HUDF photometry (F160W 29.9 AB, 5 sigma depth) probes the SFR-M* correlation down to M* ~ 10 ^7 Msun, a factor of 10-100X lower in M* than previous studies, and comparable to dwarf galaxies in the local universe. We find the slope of the SFR-M* relationship to be near unity at all redshifts and the normalization to decrease with cosmic time. We find a moderate increase in intrinsic scatter with cosmic time from 0.2 to 0.4 dex across the epoch of peak cosmic star formation. None of our redshift bins show a statistically significant increase in intrinsic scatter at low mass. However, it remains possible that intrinsic scatter increases at low mass on timescales shorter than ~ 100 Myr. Our results are consistent with a picture of gradual and self-similar assembly of galaxies across more than three orders of magnitude in stellar mass from as low as 10^7 Msun.
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