تقرير
The ASTRODEEP Frontier Fields Catalogues: II - Photometric redshifts and rest-frame properties in Abell-2744 and MACS-J0416
| العنوان: | The ASTRODEEP Frontier Fields Catalogues: II - Photometric redshifts and rest-frame properties in Abell-2744 and MACS-J0416 |
|---|---|
| المؤلفون: | Castellano, M., Amorín, R., Merlin, E., Fontana, A., McLure, R. J., Mármol-Queraltó, E., Mortlock, A., Parsa, S., Dunlop, J. S., Elbaz, D., Balestra, I., Boucaud, A., Bourne, N., Boutsia, K., Brammer, G., Bruce, V. A., Buitrago, F., Capak, P., Cappelluti, N., Ciesla, L., Comastri, A., Cullen, F., Derriere, S., Faber, S. M., Giallongo, E., Grazian, A., Grillo, C., Mercurio, A., Michałowski, M. J., Nonino, M., Paris, D., Pentericci, L., Pilo, S., Rosati, P., Santini, P., Schreiber, C., Shu, X., Wang, T. |
| المصدر: | A&A 590, A31 (2016) |
| سنة النشر: | 2016 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We present the first public release of photometric redshifts, galaxy rest-frame properties and associated magnification values in the cluster and parallel pointings of the first two Frontier Fields, Abell-2744 and MACS-J0416. We exploit a multi-wavelength catalogue ranging from HST to ground-based K and Spitzer IRAC which is specifically designed to enable detection and measurement of accurate fluxes in crowded cluster regions. The multi-band information is used to derive photometric redshifts and physical properties of sources detected either in the H-band image alone or from a stack of four WFC3 bands. To minimize systematics median photometric redshifts are assembled from six different approaches to photo-z estimates. Their reliability is assessed through a comparison with available spectroscopic samples. State of the art lensing models are used to derive magnification values on an object-by-object basis by taking into account sources positions and redshifts. We show that photometric redshifts reach a remarkable ~3-5% accuracy. After accounting for magnification the H band number counts are found in agreement at bright magnitudes with number counts from the CANDELS fields, while extending the presently available samples to galaxies intrinsically as faint as H160~32-33 thanks to strong gravitational lensing. The Frontier Fields allow to probe the galaxy stellar mass distribution at 0.5-1.5 dex lower masses, depending on magnification, with respect to extragalactic wide fields, including sources at Mstar~ 10^7-10^8 Msun at z>5. Similarly, they allow the detection of objects with intrinsic SFRs>1dex lower than in the CANDELS fields reaching 0.1-1 Msun/yr at z~6-10. [abridged] Comment: 10 pages, 9 figures, accepted for publication on A&A. CDS images and catalogues interface at http://astrodeep.u-strasbg.fr/ff/ . Full catalogues available for download from the ASTRODEEP website at http://www.astrodeep.eu/frontier-fields/ |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/201527514 |
| URL الوصول: | http://arxiv.org/abs/1603.02461 |
| رقم الأكسشن: | edsarx.1603.02461 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/201527514 |
|---|