Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-25T18:25:21.020Z Has data issue: false hasContentIssue false
  • English
  • Français

Measuring and calibrating galactic synchrotron emission

Published online by Cambridge University Press:  01 November 2008

Wolfgang Reich  and
Patricia Reich
Wolfgang Reich
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-52121 Bonn, Germany email: [email protected], [email protected]
Patricia Reich
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-52121 Bonn, Germany email: [email protected], [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Our position inside the Galaxy requires all-sky surveys to reveal its large-scale properties. The zero-level calibration of all-sky surveys differs from standard ‘relative’ measurements, where a source is measured in respect to its surroundings. All-sky surveys aim to include emission structures of all angular scales exceeding their angular resolution including isotropic emission components. Synchrotron radiation is the dominating emission process in the Galaxy up to frequencies of a few GHz, where numerous ground based surveys of the total intensity up to 1.4 GHz exist. Its polarization properties were just recently mapped for the entire sky at 1.4 GHz. All-sky total intensity and linear polarization maps from WMAP for frequencies of 23 GHz and higher became available and complement existing sky maps. Galactic plane surveys have higher angular resolution using large single-dish or synthesis telescopes. Polarized diffuse emission shows structures with no relation to total intensity emission resulting from Faraday rotation effects in the interstellar medium. The interpretation of these polarization structures critically depends on a correct setting of the absolute zero-level in Stokes U and Q.

Keywords

Techniques: polarimetric – surveys – ISM: radio continuum
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S259: Cosmic Magnetic Fields: From Planets, to Stars and Galaxies , November 2008 , pp. 603 - 612
Copyright
Copyright © International Astronomical Union 2009

References

Battistelli, C. S., Rebolo, R., & Rubino-Martin, J. A. 2006, ApJ (Letters) 645, L141CrossRefGoogle Scholar
Bennett, C. L., Bay, M., & Halpern, M. et al. 2003, ApJ 583, 1CrossRefGoogle Scholar
Brouw, W. & Spoelstra, T. 1976, A&AS 26, 129Google Scholar
Dicke, R. H., Peebles, P. J. E., Roll, P. G., & Wilkinson, D. T. 1965, ApJ 142, 414CrossRefGoogle Scholar
Han, J. L., Manchester, R. N., Lyne, A. G., Quiao, G. J., & van Straten, W. 2006, ApJ 642, 868CrossRefGoogle Scholar
Haslam, C. G. T., Salter, C. J., Stoffel, H., & Wilson, W. E. 1982, A&AS 47, 1Google Scholar
Hinshaw, G., Nolta, M. R., & Bennett, C. L., et al. 2007, ApJS 170, 288CrossRefGoogle Scholar
Hinshaw, G., Weiland, J. L., & Hill, R. S., et al. astro-ph 0803.0732Google Scholar
Kallas, E. & Reich, W. 1980, A&AS 42, 227Google Scholar
Kogut, A., Fixsen, D., & Fixen, S., et al. 2006, New Astron. Revs. 50, 925CrossRefGoogle Scholar
Mather, J. C., Cheng, E. S., & Cottingham, D. A., et al. 1994, ApJ 420, 439CrossRefGoogle Scholar
Page, L., Hinshaw, G., & Komatsu, E., et al. 2007, ApJS 170, 335CrossRefGoogle Scholar
Pearson, T. J. & C-BASS collaboration 2007, AAS-Meeting 211.9003Google Scholar
Penzias, A. A. & Wilson, R. W. 1965, ApJ 142, 419CrossRefGoogle Scholar
Reich, P. & Reich, W. 1986, A&AS 63, 205Google Scholar
Reich, P., Reich, W., & Fürst, E. 1997, A&AS 126, 413Google Scholar
Reich, P., Testori, J. C., & Reich, W. 2001, A&A 376, 861Google Scholar
Reich, P., Reich, W., & Testori, J. C. 2004 in Uyanıker, B., Reich, W. & Wielebinski, R. (eds.), The Magnetized Interstellar Medium, Katlenburg-Lindau: Copernicus GmbH, p. 63Google Scholar
Reich, W. 1982, A&AS 48, 219Google Scholar
Reich, W. 2006 in Fabbri, R. (ed.), Cosmic Polarization, Kerala/India: Research Signpost, p. 91 (astro-ph 0603465)Google Scholar
Reich, W., Reich, P., & Fürst, E. 1990, A&AS 83, 539Google Scholar
Ridge, N. A., Schnee, S. L., Goodman, A. A., & Foster, J. B. 2006, ApJ 643, 932CrossRefGoogle Scholar
Sun, X. H., Han, J. L., & Reich, W., et al. 2007, A&A 463, 993; erratum: 469, 1003Google Scholar
Sun, X. H., Reich, W., Waelkens, A., & Enßlin, T. A. 2008, A&A 477, 573Google Scholar
Taylor, A. R., Gibson, S. J., & Peracaula, M., et al. 2003, AJ 125, 3145CrossRefGoogle Scholar
Testori, J. C., Reich, P., & Reich, W. 2008, A&A 484, 783Google Scholar
Turtle, A. Y., Pugh, G. F., Kenderdine, S., & Pauliny-Toth, I. I. K. 1962, MNRAS 124, 297CrossRefGoogle Scholar
Uyanıker, B., Fürst, E., Reich, W., Reich, P., & Wielebinski, R. 1999, A&AS 138, 31Google Scholar
Watson, R. A., Rebolo, R., & Rubino-Martin, J. A., et al. 2005, ApJ (Letters) 624, L89CrossRefGoogle Scholar
Wolleben, M., Landecker, T. L., Reich, W., & Wielebinski, R. 2006, A&A 448, 441Google Scholar