The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at Redshift 1.3
The goal of the Gemini Deep Deep Survey (GDDS) is to study an unbiased sample of K<20.6 galaxies in the redshift range 0.8<z<2.0. (ism)="" -19.65.="" 1.34<z<1.97="" 13="" 38%="" <="" a="" absolute=""...
| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Journal article |
| Langue: | English |
| Publié: |
Institute of Physics Publishing
2003
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| _version_ | 1826276290822406144 |
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| author | Savaglio, S Glazebrook, K Abraham, R Crampton, D Chen, H McCarthy, P Jorgensen, I Roth, K Hook, I Marzke, R Murowinski, R Carlberg, R |
| author_facet | Savaglio, S Glazebrook, K Abraham, R Crampton, D Chen, H McCarthy, P Jorgensen, I Roth, K Hook, I Marzke, R Murowinski, R Carlberg, R |
| author_sort | Savaglio, S |
| collection | OXFORD |
| description | The goal of the Gemini Deep Deep Survey (GDDS) is to study an unbiased sample of K<20.6 galaxies in the redshift range 0.8<z<2.0. (ism)="" -19.65.="" 1.34<z<1.97="" 13="" 38%="" <="" a="" absolute="" and="" contains="" determine="" element="" enrichment="" fields="" first="" galaxies="" heavy="" here="" identified="" in="" interstellar="" m_2000="" magnitude="" medium="" number="" of="" properties="" sample="" statistical="" subsample="" survey="" the="" total="" two="" uv="" we="" with="" z="">1.3. The selected objects have colors typical of irregular and Sbc galaxies. Strong [OII] emission indicates high star formation activity in the HII regions (SFR~13-106 M_sun/yr). The high S/N composite spectrum shows strong ISM MgII and FeII absorption, together with weak MnII and MgI lines. The FeII column density, derived using the curve of growth analysis, is logN_FeII = 15.54^{+0.23}_{-0.13}. This is considerably larger than typical values found in damped Ly-alpha systems (DLAs) along QSO sight lines, where only 10 out of 87 (~11%) have logN_FeII > 15.2. High FeII column densities are observed in the z=2.72 Lyman break galaxy cB58 (logN_FeII ~ 15.25) and in gamma-ray burst host galaxies (logN_FeII ~ 14.8-15.9). Given our measured FeII column density and assuming a moderate iron dust depletion (delta_Fe ~ 1 dex), we derive an optical dust extinction A_V ~ 0.6. If the HI column density is log N(HI)<21.7 (as in 98% of DLAs), then the mean metallicity is Z/Z_sun > 0.2. The high completeness of the GDDS sample implies that these results are typical of star-forming galaxies in the 1</z<2.0.> |
| first_indexed | 2024-03-06T23:11:44Z |
| format | Journal article |
| id | oxford-uuid:65b4dffb-0a08-4dee-aa8c-023256a7cf07 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:11:44Z |
| publishDate | 2003 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:65b4dffb-0a08-4dee-aa8c-023256a7cf072022-03-26T18:27:12ZThe Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at Redshift 1.3Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:65b4dffb-0a08-4dee-aa8c-023256a7cf07EnglishSymplectic Elements at OxfordInstitute of Physics Publishing2003Savaglio, SGlazebrook, KAbraham, RCrampton, DChen, HMcCarthy, PJorgensen, IRoth, KHook, IMarzke, RMurowinski, RCarlberg, RThe goal of the Gemini Deep Deep Survey (GDDS) is to study an unbiased sample of K<20.6 galaxies in the redshift range 0.8<z<2.0. (ism)="" -19.65.="" 1.34<z<1.97="" 13="" 38%="" <="" a="" absolute="" and="" contains="" determine="" element="" enrichment="" fields="" first="" galaxies="" heavy="" here="" identified="" in="" interstellar="" m_2000="" magnitude="" medium="" number="" of="" properties="" sample="" statistical="" subsample="" survey="" the="" total="" two="" uv="" we="" with="" z="">1.3. The selected objects have colors typical of irregular and Sbc galaxies. Strong [OII] emission indicates high star formation activity in the HII regions (SFR~13-106 M_sun/yr). The high S/N composite spectrum shows strong ISM MgII and FeII absorption, together with weak MnII and MgI lines. The FeII column density, derived using the curve of growth analysis, is logN_FeII = 15.54^{+0.23}_{-0.13}. This is considerably larger than typical values found in damped Ly-alpha systems (DLAs) along QSO sight lines, where only 10 out of 87 (~11%) have logN_FeII > 15.2. High FeII column densities are observed in the z=2.72 Lyman break galaxy cB58 (logN_FeII ~ 15.25) and in gamma-ray burst host galaxies (logN_FeII ~ 14.8-15.9). Given our measured FeII column density and assuming a moderate iron dust depletion (delta_Fe ~ 1 dex), we derive an optical dust extinction A_V ~ 0.6. If the HI column density is log N(HI)<21.7 (as in 98% of DLAs), then the mean metallicity is Z/Z_sun > 0.2. The high completeness of the GDDS sample implies that these results are typical of star-forming galaxies in the 1</z<2.0.> |
| spellingShingle | Savaglio, S Glazebrook, K Abraham, R Crampton, D Chen, H McCarthy, P Jorgensen, I Roth, K Hook, I Marzke, R Murowinski, R Carlberg, R The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at Redshift 1.3 |
| title | The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at
Redshift 1.3 |
| title_full | The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at
Redshift 1.3 |
| title_fullStr | The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at
Redshift 1.3 |
| title_full_unstemmed | The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at
Redshift 1.3 |
| title_short | The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at
Redshift 1.3 |
| title_sort | gemini deep deep survey ii metals in star forming galaxies at redshift 1 3 |
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