Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-04-19
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
5 pages, 4 figures, 1 table.
Scientific paper
In order to construct accurate point sources simulations at the frequencies relevant to 21-cm experiments, the angular correlation of radio sources must be taken into account. This paper presents a measurement of angular two-point correlation function, w(\theta), at 232 MHz from the MIYUN survey - tentative measurements of w(\theta) are also performed at 151 MHz. It is found that double power law with shape w(\theta) = A \theta^{-\gamma} fits the 232 MHz data well. For the angular lenght of 0.2 degrees < \theta < 0.6 degrees, \gamma ~ -1.12, and this value of slope is independent of the flux-density threshold; while for angular lenghts much greater than 0.6 degrees, \gamma has a shallower value of about -0.16. By comparing the results of this paper with previous measurements of w(\theta), it is discussed how w(\theta) changes with the change of frequency and completness limit.
de Oliveira-Costa Angélica
Lazio Joseph
No associations
LandOfFree
Clustering of Extragalactic Sources from 151 MHz to 232 MHz: Implications for Cosmological 21-cm Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Clustering of Extragalactic Sources from 151 MHz to 232 MHz: Implications for Cosmological 21-cm Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clustering of Extragalactic Sources from 151 MHz to 232 MHz: Implications for Cosmological 21-cm Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-59685