EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 410/3 Article
Free access article

Issue A&A
Volume 410, Number 3, November II 2003
Page(s) 847 - 863
Section Stellar clusters and associations
DOI http://dx.doi.org/10.1051/0004-6361:20031125



A&A 410, 847-863 (2003)
DOI: 10.1051/0004-6361:20031125

Full sky study of diffuse Galactic emission at decimeter wavelenghts

P. Platania1, C. Burigana2, D. Maino1, E. Caserini1, M. Bersanelli1, 3, B. Cappellini1 and A. Mennella3

1  Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy
2  IASF/CNR, Sezione di Bologna, via P. Gobetti 101, 40129 Bologna, Italy
3  IASF/CNR, Sezione di Milano, via Bassini 15, 20133 Milano, Italy

(Received 5 March 2003 / Accepted 24 July 2003)

Abstract
A detailed knowledge of the Galactic radio continuum is of high interest for studies of the dynamics and structure of the Galaxy as well as for the problem of foreground removal in Cosmic Microwave Background measurements. In this work we present a full-sky study of the diffuse Galactic emission at frequencies of few GHz, where synchrotron radiation is by far the dominant component. We perform a detailed combined analysis of the extended surveys at 408, 1420 and 2326 MHz (by Haslam et al. 1982; Reich 1982; Reich & Reich 1986; Jonas et al. 1998, respectively). Using the technique applied by Schlegel et al. (1998) to the IRAS data, we produce destriped versions of the three maps. This allows us to construct a nearly-full-sky map of the spectral index and of the normalization factor with sub-degree angular resolution. The resulting distribution of the spectral indices has an average of $\bar\beta = 2.695$ and dispersion $\sigma_{\beta} = 0.120$. This is representative for the Galactic diffuse synchrotron emission, with only minor effects from free-free emission and point sources. The maps produced in this work are available via ftp at cdsarc.u-strasbg.fr


Key words: Galaxy: general -- methods: data analysis

Offprint request: P. Platania, Paola.Platania@mi.infn.it


Tables at the CDS



© ESO 2003


What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.