J-PAS delivers its main white paper
On March 20th, 2014, the J-PAS collaboration finialized and posted its white paper. This paper describes in detail the characteristics of the instruments, as well as the science that will be produced with the astrophysical surveys that will be conducted by J-PAS. The paper can be found on the arXiv website.
This paper is the result of the work of a team of scores of scientists and engineers in Europe, Brazil, and the U.S., and took more than two years in the making. Congratulations to all the J-PAS team for this important landmark!
Below is the title and abstract of the white paper.
J-PAS: The Javalambre-Physics of the Accelerated Universe Astrophysical Survey
The Javalambre-Physics of the Accelerated Universe Astrophysical Survey (J-PAS) is a narrow band, very wide field Cosmological Survey to be carried out from the Javalambre Observatory in Spain with a purpose-built, dedicated 2.5m telescope and a 4.7 sq.deg. camera with 1.2Gpix. Starting in late 2015, J-PAS will observe 8500sq.deg. of Northern Sky and measure 0.003(1+z) photo-z for 9×107 LRG and ELG galaxies plus several million QSOs, sampling an effective volume of ∼14 Gpc3 up to z=1.3 and becoming the first radial BAO experiment to reach Stage IV. J-PAS will detect 7×105 galaxy clusters and groups, setting constrains on Dark Energy which rival those obtained from its BAO measurements. Thanks to the superb characteristics of the site (seeing ~0.7 arcsec), J-PAS is expected to obtain a deep, sub-arcsec image of the Northern sky, which combined with its unique photo-z precision will produce one of the most powerful cosmological lensing surveys before the arrival of Euclid. J-PAS unprecedented spectral time domain information will enable a self-contained SN survey that, without the need for external spectroscopic follow-up, will detect, classify and measure σz∼0.5% redshifts for ∼4000 SNeIa and ∼900 core-collapse SNe. The key to the J-PAS potential is its innovative approach: a contiguous system of 54 filters with $145\AA$ width, placed $100\AA$ apart over a multi-degree FoV is a powerful “redshift machine”, with the survey speed of a 4000 multiplexing low resolution spectrograph, but many times cheaper and much faster to build. The J-PAS camera is equivalent to a 4.7 sq.deg. “IFU” and it will produce a time-resolved, 3D image of the Northern Sky with a very wide range of Astrophysical applications in Galaxy Evolution, the nearby Universe and the study of resolved stellar populations.
O empenho em analisar o entendimento das metas propostas possibilita uma melhor visão global do impacto na agilidade decisória.