THE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0
We present an analysis of the luminosities and equivalent widths of the 284 z < 0.56 [O II]-emitting galaxies found in the 169 arcmin2 pilot survey for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). By combining emission-line fluxes obtained from the Mitchell spectrograph on the...
| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Journal article |
| Langue: | English |
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Institute of Physics Publishing
2013
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| _version_ | 1826297387432280064 |
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| author | Ciardullo, R Gronwall, C Adams, J Blanc, G Gebhardt, K Finkelstein, S Jogee, S Hill, G Drory, N Hopp, U Schneider, D Zeimann, G Dalton, G |
| author_facet | Ciardullo, R Gronwall, C Adams, J Blanc, G Gebhardt, K Finkelstein, S Jogee, S Hill, G Drory, N Hopp, U Schneider, D Zeimann, G Dalton, G |
| author_sort | Ciardullo, R |
| collection | OXFORD |
| description | We present an analysis of the luminosities and equivalent widths of the 284 z < 0.56 [O II]-emitting galaxies found in the 169 arcmin2 pilot survey for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). By combining emission-line fluxes obtained from the Mitchell spectrograph on the McDonald 2.7 m telescope with deep broadband photometry from archival data, we derive each galaxy's dereddened [O II] λ3727 luminosity and calculate its total star formation rate. We show that over the last ∼5 Gyr of cosmic time, there has been substantial evolution in the [O II] emission-line luminosity function, with L* decreasing by ∼0.6 ± 0.2 dex in the observed function, and by ∼0.9 ± 0.2 dex in the dereddened relation. Accompanying this decline is a significant shift in the distribution of [O II] equivalent widths, with the fraction of high equivalent-width emitters declining dramatically with time. Overall, the data imply that the relative intensity of star formation within galaxies has decreased over the past ∼5 Gyr, and that the star formation rate density of the universe has declined by a factor of ∼2.5 between z ∼ 0.5 and z ∼ 0. These observations represent the first [O II]-based star formation rate density measurements in this redshift range, and foreshadow the advancements which will be generated by the main HETDEX survey. © 2013. The American Astronomical Society. All rights reserved. |
| first_indexed | 2024-03-07T04:30:50Z |
| format | Journal article |
| id | oxford-uuid:ce41a3ea-9180-4d45-aa3e-7e7fcb59b6b0 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:30:50Z |
| publishDate | 2013 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:ce41a3ea-9180-4d45-aa3e-7e7fcb59b6b02022-03-27T07:34:28ZTHE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ce41a3ea-9180-4d45-aa3e-7e7fcb59b6b0EnglishSymplectic Elements at OxfordInstitute of Physics Publishing2013Ciardullo, RGronwall, CAdams, JBlanc, GGebhardt, KFinkelstein, SJogee, SHill, GDrory, NHopp, USchneider, DZeimann, GDalton, GWe present an analysis of the luminosities and equivalent widths of the 284 z < 0.56 [O II]-emitting galaxies found in the 169 arcmin2 pilot survey for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). By combining emission-line fluxes obtained from the Mitchell spectrograph on the McDonald 2.7 m telescope with deep broadband photometry from archival data, we derive each galaxy's dereddened [O II] λ3727 luminosity and calculate its total star formation rate. We show that over the last ∼5 Gyr of cosmic time, there has been substantial evolution in the [O II] emission-line luminosity function, with L* decreasing by ∼0.6 ± 0.2 dex in the observed function, and by ∼0.9 ± 0.2 dex in the dereddened relation. Accompanying this decline is a significant shift in the distribution of [O II] equivalent widths, with the fraction of high equivalent-width emitters declining dramatically with time. Overall, the data imply that the relative intensity of star formation within galaxies has decreased over the past ∼5 Gyr, and that the star formation rate density of the universe has declined by a factor of ∼2.5 between z ∼ 0.5 and z ∼ 0. These observations represent the first [O II]-based star formation rate density measurements in this redshift range, and foreshadow the advancements which will be generated by the main HETDEX survey. © 2013. The American Astronomical Society. All rights reserved. |
| spellingShingle | Ciardullo, R Gronwall, C Adams, J Blanc, G Gebhardt, K Finkelstein, S Jogee, S Hill, G Drory, N Hopp, U Schneider, D Zeimann, G Dalton, G THE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0 |
| title | THE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0 |
| title_full | THE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0 |
| title_fullStr | THE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0 |
| title_full_unstemmed | THE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0 |
| title_short | THE HETDEX PILOT SURVEY. IV. THE EVOLUTION OF [O II] EMITTING GALAXIES FROM z similar to 0.5 TO z similar to 0 |
| title_sort | hetdex pilot survey iv the evolution of o ii emitting galaxies from z similar to 0 5 to z similar to 0 |
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