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http://hdl.handle.net/2289/7011Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Apurba, Bera | - |
| dc.contributor.author | Nissim, Kanekar | - |
| dc.contributor.author | Benjamin, Weiner J | - |
| dc.contributor.author | Sethi, S.K. | - |
| dc.contributor.author | Dwarakanath, K.S. | - |
| dc.date.accessioned | 2018-09-30T17:53:31Z | - |
| dc.date.available | 2018-09-30T17:53:31Z | - |
| dc.date.issued | 2018-09-20 | - |
| dc.identifier.citation | Astrophysical Journal, 2018, Vol. 865, p39 | en_US |
| dc.identifier.issn | 0004-637X | - |
| dc.identifier.issn | 1538-4357-(Online) | - |
| dc.identifier.uri | http://hdl.handle.net/2289/7011 | - |
| dc.description | Open Access | en_US |
| dc.description.abstract | We report deep Giant Metrewave Radio Telescope (GMRT) 610 MHz continuum imaging of four subfields of the DEEP2 Galaxy Redshift Survey. We stacked the radio emission in the GMRT images from a near-complete (absolute blue magnitude M B ≤ −21) sample of 3698 blue star-forming galaxies with redshifts 0.7 lesssim z lesssim 1.45 to detect (at ≈17σ significance) the median rest-frame 1.4 GHz radio continuum emission of the sample galaxies. The stacked emission is unresolved, with a rest-frame 1.4 GHz luminosity of L 1.4GHz = (4.13 ± 0.24) × 1022 W Hz−1. We used the local relation between total star formation rate (SFR) and 1.4 GHz luminosity to infer a median total SFR of (24.4 ± 1.4) M ⊙ yr−1 for blue star-forming galaxies with M B ≤ −21 at 0.7 lesssim z lesssim 1.45. We detect the main-sequence relation between SFR and stellar mass, M sstarf, obtaining SFR = (13.4 ± 1.8) × [(M sstarf/1010 M ⊙)]0.73±0.09 M ⊙ yr−1; the power-law index shows no change over z ≈ 0.7–1.45. We find that the nebular line emission suffers less extinction than the stellar continuum, contrary to the situation in the local universe; the ratio of nebular extinction to stellar extinction increases with decreasing redshift. We obtain an upper limit of 0.87 Gyr to the atomic gas depletion time of a subsample of DEEP2 galaxies at z ≈ 1.3; neutral atomic gas thus appears to be a transient phase in high-z star-forming galaxies | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | IOP Sciences for The American Astronomical Society | en_US |
| dc.relation.uri | https://doi.org/10.3847/1538-4357/aad698 | en_US |
| dc.rights | 2018. The American Astronomical Society | en_US |
| dc.subject | galaxies: high-redshift | en_US |
| dc.subject | galaxies: star formation | en_US |
| dc.subject | radio continuum galaxies | en_US |
| dc.title | Probing Star Formation in Galaxies at z ≈ 1 via a Giant Metrewave Radio Telescope Stacking Analysis | en_US |
| dc.type | Article | en_US |
| Appears in Collections: | Research Papers (A&A) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2018_ApJ_Vol.865_p39.pdf | Open Access | 1.09 MB | Adobe PDF | View/Open |
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