2026-06-27T15:47:55Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/339282023-08-27T01:13:23Zcom_20.500.14352_14col_20.500.14352_15

Pérez González, Pablo Guillermo 2023-06-19T13:31:19Z 2023-06-19T13:31:19Z 2014-11-10 0004-637X 10.1088/0004-637X/795/2/145 https://hdl.handle.net/20.500.14352/33928 http://dx.doi.org/10.1088/0004-637X/795/2/145 http://iopscience.iop.org/ We present Keck-I MOSFIRE near-infrared spectroscopy for a sample of 13 compact star-forming galaxies (SFGs) at redshift 2 ≤ z ≤ 2.5 with star formation rates of SFR ∼ 100 M yr−1 and masses of log(M/M ) ∼ 10.8. Their high integrated gas velocity dispersions of σint = 230+40 −30 km s−1, as measured from emission lines of Hα and [O iii], and the resultant M –σint relation and M –Mdyn all match well to those of compact quiescent galaxies at z ∼ 2, as measured from stellar absorption lines. Since log(M /Mdyn) = −0.06 ± 0.2 dex, these compact SFGs appear to be dynamically relaxed and evolved, i.e., depleted in gas and dark matter (˂13+17 −13%), and present larger σint than their non-compact SFG counterparts at the same epoch. Without infusion of external gas, depletion timescales are short, less than ∼300 Myr. This discovery adds another link to our new dynamical chain of evidence that compact SFGs at z ≳ 2 are already losing gas to become the immediate progenitors of compact quiescent galaxies by z ∼ 2. eng open access Keck-I mosfire spectroscopy of compact star-forming galaxies at z ≳ 2: High velocity dispersions in progenitors of compact quiescent galaxies journal article