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| DOI | 10.1111/J.1365-2966.2011.17247.X | ||||
| Año | 2011 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We have measured redshifts for 243 z approximate to 3 quasars in nine Very Large Telescope (VLT) Visible Imaging and Multi-Object Spectrograph (VIMOS) Lyman-break galaxy (LBG) redshift survey areas, each of which is centred on a known bright quasar. Using the spectra of these quasars, we measure the cross-correlation between neutral hydrogen gas causing the Ly alpha forest and 1020 LBGs at z approximate to 3. We find an increase in neutral hydrogen absorption within approximate to 5 h(-1) Mpc of a galaxy in agreement with the results of Adelberger et al. The Ly alpha-LBG cross-correlation can be described by a power law on scales larger than 3 h(-1) Mpc. When galaxy velocity dispersions are taken into account, our results at smaller scales (<2 h(-1) Mpc) are also in good agreement with the results of Adelberger et al. There is little immediate indication of a region with a transmission spike above the mean intergalactic medium value which might indicate the presence of star formation feedback. To measure the galaxy velocity dispersions, which include both intrinsic LBG velocity dispersion and redshift errors, we have used the LBG-LBG redshift-space distortion measurements of Bielby et al. We find that the redshift-space transmission spike implied in the results of Adelberger et al. is too narrow to be physical in the presence of the likely LBG velocity dispersion and is likely to be a statistical fluke. Nevertheless, neither our nor previous data can rule out the presence of a narrow, real-space transmission spike, given the evidence of the increased Ly alpha absorption surrounding LBGs which can mask the spike's presence when convolved with a realistic LBG velocity dispersion. Finally, we identify 176 C IV systems in the quasar spectra and find an LBG-CIV correlation strength on scales of 10 h(-1) Mpc consistent with the relation measured at approximate to Mpc scales.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Crighton, N. H. | Hombre |
Univ Durham - Reino Unido
University of Durham - Reino Unido Durham University - Reino Unido |
| 2 | Bielby, R. M. | Hombre |
Univ Durham - Reino Unido
UNIV PARIS 06 - Francia University of Durham - Reino Unido Institut d 'Astrophysique de Paris - Francia Durham University - Reino Unido Institut d’Astrophysique de Paris - Francia |
| 3 | Shanks, T. | - |
Univ Durham - Reino Unido
University of Durham - Reino Unido Durham University - Reino Unido |
| 4 | INFANTE-LIRA, LEOPOLDO | Hombre |
Pontificia Universidad Católica de Chile - Chile
|
| 5 | Bornancini, C. G. | - |
UNIV NACL CORDOBA - Argentina
Comision Nacional de Investigacion Cientifica y Tecnologica - Argentina Instituto de Astronomia Teorica y Experimental - Argentina Consejo Nacional de Investigaciones Científicas y Técnicas - Argentina |
| 6 | Bouche, N. | Hombre |
UNIV CALIF SANTA BARBARA - Estados Unidos
University of California, Santa Barbara - Estados Unidos |
| 7 | Garcia Lambas, Diego | Hombre |
UNIV NACL CORDOBA - Argentina
Comision Nacional de Investigacion Cientifica y Tecnologica - Argentina Instituto de Astronomia Teorica y Experimental - Argentina Consejo Nacional de Investigaciones Científicas y Técnicas - Argentina |
| 8 | Lowenthal, J. D. | Hombre |
Smith Coll - Estados Unidos
Smith College - Estados Unidos |
| 9 | MINNITI-DEL BARCO, DANTE | Hombre |
Pontificia Universidad Católica de Chile - Chile
Vatican Observ - Vaticano Vatican Observatory - Italia |
| 10 | Morris, Simon L. | Hombre |
Univ Durham - Reino Unido
University of Durham - Reino Unido Durham University - Reino Unido |
| 11 | Padilla, Nelson D. | Hombre |
Pontificia Universidad Católica de Chile - Chile
|
| 12 | Peroux, Celine | - |
Univ Aix Marseille - Francia
Laboratoire d'Astrophysique de Marseille - Francia Aix Marseille Université - Francia |
| 13 | Petitjean, P. | - |
UNIV PARIS 06 - Francia
|
| 14 | Theuns, Tom | - |
Univ Durham - Reino Unido
Univ Antwerp - Bélgica University of Durham - Reino Unido Universiteit Antwerpen - Bélgica Durham University - Reino Unido |
| 15 | Tummuangpak, P. | - |
Univ Durham - Reino Unido
University of Durham - Reino Unido Durham University - Reino Unido |
| 16 | Weilbacher, Peter M. | Hombre |
Astrophys Inst Potsdam - Alemania
Leibniz Institute for Astrophysics Potsdam - Alemania |
| 17 | Wisotzki, Lutz | Hombre |
Astrophys Inst Potsdam - Alemania
Leibniz Institute for Astrophysics Potsdam - Alemania |
| 18 | Worseck, G. | - |
Univ Calif Santa Cruz - Estados Unidos
University of California, Santa Cruz - Estados Unidos Lick Observatory - Estados Unidos |
| Fuente |
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| Consejo Nacional de Investigaciones Científicas y Técnicas |
| Science and Technology Facilities Council |
| BASAL CATA |
| FONDAP CFA |
| European Union through LENAC, the Latin American European Network for Astrophysics and Cosmology |
| Secretaria de Ciencia y Tecnica de la Universidad Nacional de Cordoba |
| Agradecimiento |
|---|
| This work was partially supported by the Consejo Nacional de Investigaciones Cientificas y Tecnicas and Secretaria de Ciencia y Tecnica de la Universidad Nacional de Cordoba, and the European Union Alfa II Programme, through LENAC, the Latin American European Network for Astrophysics and Cosmology. DM, NP and LI are supported by FONDAP CFA 15010003 and BASAL CATA PFB-06. |