sukye

astro-ph 0801w4

January 27, 2008 on 11:26 pm | In Uncategorized |

NICMOS Measurements of the Near Infrared Background
http://arxiv.org/abs/0801.3825
he near infrared background is now spatially resolved and is dominated by galaxies in the redshift range between 0.5 and 1.5

Estimating the Redshift Distribution of Faint Galaxy Samples
http://arxiv.org/abs/0801.3822
assigns weights to galaxies in a spectroscopic subsample such that the weighted distributions of photometric observables (e.g., multi-band magnitudes) match the corresponding distributions for the photometric sample. The weights are estimated using a nearest-neighbor technique that ensures stability in sparsely populated regions of color-magnitude space. The derived weights are then summed in redshift bins to create the redshift distribution.

Optical monitoring of the z=4.40 quasar Q 2203+292
http://arxiv.org/abs/0801.3729

Confirmation of a correlation between the X-ray luminosity and spectral slope of AGNs in the Chandra Deep Fields
http://arxiv.org/abs/0801.3599
0.1 < z < 4

Large Scale Structures at High Redshift in the GOODS Field
http://arxiv.org/abs/0801.3557
GOODS-South, catalogue of overdensities, up to z ~ 2.5

*Detecting quasars at very high redshift with next generation X-ray telescopes*
http://arxiv.org/abs/0801.3482
modelling of the evolution of the optical and X-ray AGN luminosity function at 2 < z < 6 based on a CDM merger-driven model

Difference Imaging of Lensed Quasar Candidates in the SDSS Supernova Survey Region
http://arxiv.org/abs/0801.3432
Difference imaging provides a new way to discover gravitationally lensed quasars because few non-lensed sources will show spatially extended, time variable flux.

Can very massive stars avoid Pair-Instability Supernovae?
http://arxiv.org/abs/0801.3397
magnetic fields provide the strong coupling that is lacking in standard evolution metal-free models and our 150 Msol Population III model avoids indeed the pair-instability explosion.

Astroparticle Physics: Puzzles and Discoveries
http://arxiv.org/abs/0801.3028