A census of star-forming galaxies in the z~9-10 universe based on HST+spitzer observations over 19 CLASH clusters: three candidate z~9-10 galaxies and improved constraints on the star formation rate density at z~9
We utilise a two-color Lyman-Break selection criterion to search for z~9-10 galaxies over the first 19 clusters in the CLASH program. A systematic search yields three z~9-10 candidates. While we have already reported the most robust of these candidates, MACS1149-JD, two additional z~9 candidates are...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
3 Sep 2014
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| In: |
Arxiv
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| Online-Zugang: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1211.2230
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| Verfasserangaben: | R. Bouwens, L. Bradley, A. Zitrin, D. Coe, M. Franx, W. Zheng, R. Smit, O. Host, M. Postman, L. Moustakas, I. Labbe, M. Carrasco, A. Molino, M. Donahue, D.D. Kelson, M. Meneghetti, N. Benitez, D. Lemze, K. Umetsu, T. Broadhurst, J. Moustakas, P. Rosati, M. Bartelmann, H. Ford, G. Graves, C. Grillo, L. Infante, Y. Jiminez-Teja, S. Jouvel, O. Lahav, D. Maoz, E. Medezinski, P. Melchior, J. Merten, M. Nonino, S. Ogaz, S. Seitz |
MARC
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| 100 | 1 | |a Bouwens, Rychard J. |e VerfasserIn |0 (DE-588)1139869388 |0 (DE-627)89777695X |0 (DE-576)470764384 |4 aut | |
| 245 | 1 | 2 | |a A census of star-forming galaxies in the z~9-10 universe based on HST+spitzer observations over 19 CLASH clusters |b three candidate z~9-10 galaxies and improved constraints on the star formation rate density at z~9 |c R. Bouwens, L. Bradley, A. Zitrin, D. Coe, M. Franx, W. Zheng, R. Smit, O. Host, M. Postman, L. Moustakas, I. Labbe, M. Carrasco, A. Molino, M. Donahue, D.D. Kelson, M. Meneghetti, N. Benitez, D. Lemze, K. Umetsu, T. Broadhurst, J. Moustakas, P. Rosati, M. Bartelmann, H. Ford, G. Graves, C. Grillo, L. Infante, Y. Jiminez-Teja, S. Jouvel, O. Lahav, D. Maoz, E. Medezinski, P. Melchior, J. Merten, M. Nonino, S. Ogaz, S. Seitz |
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| 520 | |a We utilise a two-color Lyman-Break selection criterion to search for z~9-10 galaxies over the first 19 clusters in the CLASH program. A systematic search yields three z~9-10 candidates. While we have already reported the most robust of these candidates, MACS1149-JD, two additional z~9 candidates are also found and have H_{160}-band magnitudes of ~26.2-26.9. A careful assessment of various sources of contamination suggests <~1 contaminants for our z~9-10 selection. To determine the implications of these search results for the LF and SFR density at z~9, we introduce a new differential approach to deriving these quantities in lensing fields. Our procedure is to derive the evolution by comparing the number of z~9-10 galaxy candidates found in CLASH with the number of galaxies in a slightly lower redshift sample (after correcting for the differences in selection volumes), here taken to be z~8. This procedure takes advantage of the fact that the relative volumes available for the z~8 and z~9-10 selections behind lensing clusters are not greatly dependent on the details of the lensing models. We find that the normalization of the UV LF at z~9 is just 0.28_{-0.20}^{+0.39}\times that at z~8, ~1.4_{-0.8}^{+3.0}x lower than extrapolating z~4-8 LF results. While consistent with the evolution in the UV LF seen at z~4-8, these results marginally favor a more rapid evolution at z>8. Compared to similar evolutionary findings from the HUDF, our result is less insensitive to large-scale structure uncertainties, given our many independent sightlines on the high-redshift universe. | ||
| 650 | 4 | |a Astrophysics - Cosmology and Nongalactic Astrophysics | |
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| 700 | 1 | |a Carrasco, Mauricio |e VerfasserIn |0 (DE-588)1058273698 |0 (DE-627)796678987 |0 (DE-576)414321812 |4 aut | |
| 700 | 1 | |a Bartelmann, Matthias |d 1965- |e VerfasserIn |0 (DE-588)141554185 |0 (DE-627)629953090 |0 (DE-576)170611779 |4 aut | |
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