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• W4300960935 endingPage "103" @default.
• W4300960935 startingPage "103" @default.
• W4300960935 abstract "Abstract We describe the design, data analysis, and basic results of the Giant Metrewave Radio Telescope Cold-H i AT z ≈ 1 (GMRT-CAT z 1) survey, a 510 hr upgraded GMRT H i 21 cm emission survey of galaxies at z = 0.74−1.45 in the DEEP2 survey fields. The GMRT-CAT z 1 survey is aimed at characterizing H i in galaxies during and just after the epoch of peak star formation activity in the universe, a key epoch in galaxy evolution. We obtained high-quality H i 21 cm spectra for 11,419 blue star-forming galaxies at z = 0.74−1.45, in seven pointings on the DEEP2 subfields. We detect the stacked H i 21 cm emission signal of the 11,419 star-forming galaxies, which have an average stellar mass of M * ≈ 10 10 M ⊙ , at 7.1 σ statistical significance, obtaining an average H i mass of 〈 M H i 〉 = (13.7 ± 1.9) × 10 9 M ⊙ . This is significantly higher than the average H i mass of 〈 M H i 〉 = (3.96 ± 0.17) × 10 9 M ⊙ in star-forming galaxies at z ≈ 0 with an identical stellar-mass distribution. We stack the rest-frame 1.4 GHz continuum emission of our 11,419 galaxies to infer an average star formation rate (SFR) of 8.07 ± 0.82 M ⊙ yr −1 . Combining our average H i mass and average SFR estimates yields an H i depletion timescale of 1.70 ± 0.29 Gyr, for star-forming galaxies at z ≈ 1, ≈3 times lower than that of local galaxies. We thus find that, although main-sequence galaxies at z ≈ 1 have a high H i mass, their short H i depletion timescale is likely to cause quenching of their star formation activity in the absence of rapid gas accretion from the circumgalactic medium." @default.
• W4300960935 created "2022-10-04" @default.
• W4300960935 creator A5059993239 @default.
• W4300960935 creator A5076495705 @default.
• W4300960935 creator A5087599913 @default.
• W4300960935 date "2022-10-01" @default.
• W4300960935 modified "2023-09-30" @default.
• W4300960935 title "The Giant Metrewave Radio Telescope Cold-Hi AT z ≈ 1 Survey" @default.
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• W4300960935 doi "https://doi.org/10.3847/1538-4357/ac7d52" @default.
• W4300960935 hasPublicationYear "2022" @default.
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