Correlation between SFR surface density and thermal pressure of ionized gas in local analogs of high-redshift galaxies
T Jiang, S Malhotra, H Yang… - The Astrophysical …, 2019 - iopscience.iop.org
T Jiang, S Malhotra, H Yang, JE Rhoads
The Astrophysical Journal, 2019•iopscience.iop.orgWe explore the relation between the star formation rate surface density (ΣSFR) and the
interstellar gas pressure for nearby compact starburst galaxies. The sample consists of 17
green peas and 19 Lyman break analogs (LBAs). Green peas are nearby analogs of Lyα
emitters at high redshift and LBAs are nearby analogs of Lyman break galaxies at high
redshift. We measure the sizes of green peas using Hubble Space Telescope Cosmic
Origins Spectrograph near-UV images with a spatial resolution of∼ 0 farcs 05. We estimate …
interstellar gas pressure for nearby compact starburst galaxies. The sample consists of 17
green peas and 19 Lyman break analogs (LBAs). Green peas are nearby analogs of Lyα
emitters at high redshift and LBAs are nearby analogs of Lyman break galaxies at high
redshift. We measure the sizes of green peas using Hubble Space Telescope Cosmic
Origins Spectrograph near-UV images with a spatial resolution of∼ 0 farcs 05. We estimate …
Abstract
We explore the relation between the star formation rate surface density (ΣSFR) and the interstellar gas pressure for nearby compact starburst galaxies. The sample consists of 17 green peas and 19 Lyman break analogs (LBAs). Green peas are nearby analogs of Lyα emitters at high redshift and LBAs are nearby analogs of Lyman break galaxies at high redshift. We measure the sizes of green peas using Hubble Space Telescope Cosmic Origins Spectrograph near-UV images with a spatial resolution of∼ 0 farcs 05. We estimate the gas thermal pressure in H ii regions by P= N total Tk B≃ 2n e Tk B. The electron density is derived using the [S ii] doublet at 6716, 6731 Å and the temperature is calculated from the [O iii] lines. The correlation is characterized by ΣSFR=
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