The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey
Here we describe the first results of the Advanced Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey, which provides cosmic tomography of the evolution of the contents of the universe over most of cosmic history. Our novel approach employs 20 contiguous, equal-width, medium-...
| Autores: | , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/62320 |
| Acceso en línea: | http://hdl.handle.net/11441/62320 https://doi.org/10.1088/0004-6256/136/3/1325 |
| Access Level: | acceso abierto |
| Palabra clave: | Galaxies: evolution Techniques: photometric Cosmology: observations |
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The alhambra survey: a large area multimedium-band optical and near-infrared photometric surveyMoles, M.Benítez, N.L. Aguerri, J. A.Alfaro, Emilio J.Broadhurst, T.Cabrera Caño, Jesús MaríaCastander, F. J.Cepa, J.Cerviño, M.Cristóbal Hornillos, D.Galaxies: evolutionTechniques: photometricCosmology: observationsHere we describe the first results of the Advanced Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey, which provides cosmic tomography of the evolution of the contents of the universe over most of cosmic history. Our novel approach employs 20 contiguous, equal-width, medium-band filters covering from 3500 to 9700 , plus the standard JHKs near-infrared (NIR) bands, to observe a total area of 4 deg2 on the sky. The optical photometric system has been designed to maximize the number of objects with accurate classification by spectral energy distribution type and redshift, and to be sensitive to relatively faint emission features in the spectrum. The observations are being carried out with the Calar Alto 3.5 m telescope using the wide-field cameras in the optical, Large Area Imager for Calar Alto, and in the NIR, Omega-2000. The first data confirm that we are reaching the expected magnitude limits (for a total of 100 ks integration time per pointing) of AB ≤ 25 mag (for an unresolved object, signal-to-noise ratio = 5) in the optical filters from the blue to 8300 , and from AB = 24.7 to 23.4 for the redder ones. The limit in the NIR, for a total of 15 ks exposure time per pointing, is (in the Vega system) Ks 20 mag, H 21 mag, J 22 mag. Some preliminary results are presented here to illustrate the capabilities of the ongoing survey. We expect to obtain accurate redshift values, Δz/(1 + z) ≤ 0.03 for about five ×105 galaxies with I ≤ 25 (60% completeness level), and z med = 0.74. This accuracy, together with the homogeneity of the selection function, will allow for the study of the redshift evolution of the large-scale structure, the galaxy population and its evolution with redshift, the identification of clusters of galaxies, and many other studies, without the need for any further follow-up. It will also provide targets for detailed studies with 10 m class telescopes. Given its area, spectral coverage, and its depth, apart from those main goals, the ALHAMBRA survey will also produce valuable data for galactic studies.Ministerio de Educación y Ciencia AYA2002-12685-E AYA2003-08729-C02-01 AYA2003-0128 AYA2004-08260-C03-01 AYA2004-20014-E AYA2004-02703 AYA2004-05395 AYA2005-06816 AYA2005-07789 AYA2006-14056Junta de Andalucía TIC114 TIC101IOP Publishing Ltd.Física Atómica, Molecular y NuclearMinisterio de Educación y Ciencia (MEC). EspañaJunta de Andalucía2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/62320https://doi.org/10.1088/0004-6256/136/3/1325reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésAstronomical Journal, 136 (3), 1325-1339.AYA2002-12685-EAYA2003-08729-C02-01AYA2003-0128AYA2004-08260-C03-01AYA2004-20014-EAYA2004-02703AYA2004-05395AYA2005-06816AYA2005-07789AYA2006-14056TIC114TIC101http://dx.doi.org/10.1088/0004-6256/136/3/1325info:eu-repo/semantics/openAccessoai:idus.us.es:11441/623202026-06-17T12:51:07Z |
| dc.title.none.fl_str_mv |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey |
| title |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey |
| spellingShingle |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey Moles, M. Galaxies: evolution Techniques: photometric Cosmology: observations |
| title_short |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey |
| title_full |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey |
| title_fullStr |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey |
| title_full_unstemmed |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey |
| title_sort |
The alhambra survey: a large area multimedium-band optical and near-infrared photometric survey |
| dc.creator.none.fl_str_mv |
Moles, M. Benítez, N. L. Aguerri, J. A. Alfaro, Emilio J. Broadhurst, T. Cabrera Caño, Jesús María Castander, F. J. Cepa, J. Cerviño, M. Cristóbal Hornillos, D. |
| author |
Moles, M. |
| author_facet |
Moles, M. Benítez, N. L. Aguerri, J. A. Alfaro, Emilio J. Broadhurst, T. Cabrera Caño, Jesús María Castander, F. J. Cepa, J. Cerviño, M. Cristóbal Hornillos, D. |
| author_role |
author |
| author2 |
Benítez, N. L. Aguerri, J. A. Alfaro, Emilio J. Broadhurst, T. Cabrera Caño, Jesús María Castander, F. J. Cepa, J. Cerviño, M. Cristóbal Hornillos, D. |
| author2_role |
author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Física Atómica, Molecular y Nuclear Ministerio de Educación y Ciencia (MEC). España Junta de Andalucía |
| dc.subject.none.fl_str_mv |
Galaxies: evolution Techniques: photometric Cosmology: observations |
| topic |
Galaxies: evolution Techniques: photometric Cosmology: observations |
| description |
Here we describe the first results of the Advanced Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey, which provides cosmic tomography of the evolution of the contents of the universe over most of cosmic history. Our novel approach employs 20 contiguous, equal-width, medium-band filters covering from 3500 to 9700 , plus the standard JHKs near-infrared (NIR) bands, to observe a total area of 4 deg2 on the sky. The optical photometric system has been designed to maximize the number of objects with accurate classification by spectral energy distribution type and redshift, and to be sensitive to relatively faint emission features in the spectrum. The observations are being carried out with the Calar Alto 3.5 m telescope using the wide-field cameras in the optical, Large Area Imager for Calar Alto, and in the NIR, Omega-2000. The first data confirm that we are reaching the expected magnitude limits (for a total of 100 ks integration time per pointing) of AB ≤ 25 mag (for an unresolved object, signal-to-noise ratio = 5) in the optical filters from the blue to 8300 , and from AB = 24.7 to 23.4 for the redder ones. The limit in the NIR, for a total of 15 ks exposure time per pointing, is (in the Vega system) Ks 20 mag, H 21 mag, J 22 mag. Some preliminary results are presented here to illustrate the capabilities of the ongoing survey. We expect to obtain accurate redshift values, Δz/(1 + z) ≤ 0.03 for about five ×105 galaxies with I ≤ 25 (60% completeness level), and z med = 0.74. This accuracy, together with the homogeneity of the selection function, will allow for the study of the redshift evolution of the large-scale structure, the galaxy population and its evolution with redshift, the identification of clusters of galaxies, and many other studies, without the need for any further follow-up. It will also provide targets for detailed studies with 10 m class telescopes. Given its area, spectral coverage, and its depth, apart from those main goals, the ALHAMBRA survey will also produce valuable data for galactic studies. |
| publishDate |
2008 |
| dc.date.none.fl_str_mv |
2008 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11441/62320 https://doi.org/10.1088/0004-6256/136/3/1325 |
| url |
http://hdl.handle.net/11441/62320 https://doi.org/10.1088/0004-6256/136/3/1325 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Astronomical Journal, 136 (3), 1325-1339. AYA2002-12685-E AYA2003-08729-C02-01 AYA2003-0128 AYA2004-08260-C03-01 AYA2004-20014-E AYA2004-02703 AYA2004-05395 AYA2005-06816 AYA2005-07789 AYA2006-14056 TIC114 TIC101 http://dx.doi.org/10.1088/0004-6256/136/3/1325 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf application/pdf |
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IOP Publishing Ltd. |
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IOP Publishing Ltd. |
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reponame:idUS. Depósito de Investigación de la Universidad de Sevilla instname:Universidad de Sevilla (US) |
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Universidad de Sevilla (US) |
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