Academic Journal
Lyman continuum escape fraction of faint galaxies at z ~ 3.3 in the CANDELS/GOODS-North, EGS, and COSMOS fields with LBC
| العنوان: | Lyman continuum escape fraction of faint galaxies at z ~ 3.3 in the CANDELS/GOODS-North, EGS, and COSMOS fields with LBC |
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| المؤلفون: | Grazian, A., Giallongo, E., Paris, D., Boutsia, K., Dickinson, M., Santini, P., Windhorst, R. A., Jansen, R. A., Cohen, S. H., Ashcraft, T. A., Scarlata, C., Rutkowski, M. J., Vanzella, E., Cusano, F., Cristiani, S., Giavalisco, M., Ferguson, H. C., Koekemoer, A., Grogin, N. A., Castellano, M., Fiore, F., Fontana, A., Marchi, F., Pedichini, F., Pentericci, L., Amorín, R., Barro, G., Bonchi, A., Bongiorno, A., Faber, S. M., Fumana, M., Galametz, A., Guaita, L., Kocevski, D. D., Merlin, E., Nonino, M., O’Connell, R. W., Pilo, S., Ryan, R. E., Sani, E., Speziali, R., Testa, V., Weiner, B., Yan, H. |
| Thesis Advisors: | Univ Arizona, Dept Astron & Steward Observ |
| بيانات النشر: | EDP SCIENCES S A, 2017. |
| سنة النشر: | 2017 |
| المجموعة: | University of Arizona |
| Original Material: | Lyman continuum escape fraction of faint galaxies at z ~ 3.3 in the CANDELS/GOODS-North, EGS, and COSMOS fields with LBC 2017, 602:A18 Astronomy & Astrophysics Astronomy & Astrophysics |
| مصطلحات موضوعية: | galaxies: distances and redshifts, galaxies: evolution, galaxies: high-redshift, galaxies: photometry |
| الوصف: | Context. The reionization of the Universe is one of the most important topics of present-day astrophysical research. The most plausible candidates for the reionization process are star-forming galaxies, which according to the predictions of the majority of the theoretical and semi-analytical models should dominate the H I ionizing background at z greater than or similar to 3. Aims. We measure the Lyman continuum escape fraction, which is one of the key parameters used to compute the contribution of star-forming galaxies to the UV background. It provides the ratio between the photons produced at lambda L*), while for the faint population (L = 0.2L*) the limit to the escape fraction is less than or similar to 10%. We computed the contribution of star-forming galaxies to the observed UV background at z similar to 3 and find that it is not sufficient to keep the Universe ionized at these redshifts unless their escape fraction increases significantly (>= 10%) at low luminosities (M-1500 >= -19). Conclusions. We compare our results on the Lyman continuum escape fraction of high-z galaxies with recent estimates in the literature, and discuss future prospects to shed light on the end of the Dark Ages. In the future, strong gravitational lensing will be fundamental in order to measure the Lyman continuum escape fraction down to faint magnitudes (M-1500 similar to -16) that are inaccessible with the present instrumentation on blank fields. These results will be important in order to quantify the role of faint galaxies to the reionization budget. |
| Original Identifier: | oai:arizona.openrepository.com:10150/625832 |
| نوع الوثيقة: | Article |
| اللغة: | English |
| تدمد: | 0004-6361 1432-0746 |
| Relation: | http://www.aanda.org/10.1051/0004-6361/201730447 |
| DOI: | 10.1051/0004-6361/201730447 |
| الاتاحة: | http://hdl.handle.net/10150/625832 http://arizona.openrepository.com/arizona/handle/10150/625832 |
| Rights: | © ESO, 2017 |
| رقم الانضمام: | edsndl.arizona.edu.oai.arizona.openrepository.com.10150.625832 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
Full Text Finder | تدمد: | 00046361 14320746 |
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| DOI: | 10.1051/0004-6361/201730447 |