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Pregled bibliografske jedinice broj: 766721

Initial LOFAR observations of epoch of reionization windows. II. Diffuse polarized emission in the ELAIS-N1 field

Jelić, Vibor; de Bruyn, A. G.; Mevius, M.; Abdalla, F. B.; Asad, K. M. B.; Bernardi, G.; Brentjens, M. A.; Bus, S.; Chapman, E.; Ciardi, B. et al.
Initial LOFAR observations of epoch of reionization windows. II. Diffuse polarized emission in the ELAIS-N1 field // Astronomy and astrophysics, 568 (2014), A101-1 doi:10.1051/0004-6361/201423998 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 766721 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Initial LOFAR observations of epoch of reionization windows. II. Diffuse polarized emission in the ELAIS-N1 field

Autori
Jelić, Vibor ; de Bruyn, A. G. ; Mevius, M. ; Abdalla, F. B. ; Asad, K. M. B. ; Bernardi, G. ; Brentjens, M. A. ; Bus, S. ; Chapman, E. ; Ciardi, B. ; Daiboo, S. ; Fernandez, E. R. ; Ghosh, A. ; Harker, G. ; Jensen, H. ; Kazemi, S. ; Koopmans, L. V. E. ; Labropoulos, P. ; Martinez-Rubi, O. ; Mellema, G. ; Offringa, A. R. ; Pandey, V. N. ; Patil, A. H. ; Thomas, R. M. ; Vedantham, H. K. ; Veligatla, V. ; Yatawatta, S. ; Zaroubi, S. ; Alexov, A. ; Anderson, J. ; Avruch, I. M. ; Beck, R. ; Bell, M. E. ; Bentum, M. J. ; Best, P. ; Bonafede, A. ; Bregman, J. ; Breitling, F. ; Broderick, J. ; Brouw, W. N. ; Brüggen, M. ; Butcher, H. R. ; Conway, J. E. ; de Gasperin, F. ; de Geus, E. ; Deller, A. ; Dettmar, R.-J. ; Duscha, S. ; Eislöffel, J. ; Engels, D. ; Falcke, H. ; Fallows, R. A. ; Fender, R. ; Ferrari, C. ; Frieswijk, W. ; Garrett, M. A. ; Grießmeier, J. ; Gunst, A. W. ; Hamaker, J. P. ; Hassall, T. E. ; Haverkorn, M. ; Heald, G. ; Hessels, J. W. T. ; Hoeft, M. ; Hörandel, J. ; Horneffer, A. ; van der Horst, A. ; Iacobelli, M. ; Juette, E. ; Karastergiou, A. ; Kondratiev, V. I. ; Kramer, M. ; Kuniyoshi, M. ; Kuper, G. ; van Leeuwen, J. ; Maat, P. ; Mann, G. ; McKay-Bukowski, D. ; McKean, J. P. ; Munk, H. ; Nelles, A. ; Norden, M. J. ; Paas, H. ; Pandey-Pommier, M. ; Pietka, G. ; Pizzo, R. ; Polatidis, A. G. ; Reich, W. ; Röttgering, H. ; Rowlinson, A. ; Scaife, A. M. M. ; Schwarz, D. ; Serylak, M. ; Smirnov, O. ; Steinmetz, M. ; Stewart, A. ; Tagger, M. ; Tang, Y. ; Tasse, C. ; ter Veen, S. ; Thoudam, S. ; Toribio, C. ; Vermeulen, R. ; Vocks, C. ; van Weeren, R. J. ; Wijers, R. A. M. J. ; Wijnholds, S. J. ; Wucknitz, O. ; Zarka, P.

Izvornik
Astronomy and astrophysics (0004-6361) 568 (2014); A101-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
radio continuum: ISM; techniques: interferometric; techniques: polarimetric; cosmology: observations; diffuse radiation; dark ages; reionization; first stars

Sažetak
This study aims to characterise the polarized foreground emission in the ELAIS-N1 field and to address its possible implications for extracting of the cosmological 21 cm signal from the LOw-Frequency ARray - Epoch of Reionization (LOFAR-EoR) data. We used the high band antennas of LOFAR to image this region and RM-synthesis to unravel structures of polarized emission at high Galactic latitudes. The brightness temperature of the detected Galactic emission is on average ~4 K in polarized intensity and covers the range from -10 to + 13 rad m-2 in Faraday depth. The total polarized intensity and polarization angle show a wide range of morphological features. We have also used the Westerbork Synthesis Radio Telescope (WSRT) at 350 MHz to image the same region. The LOFAR and WSRT images show a similar complex morphology at comparable brightness levels, but their spatial correlation is very low. The fractional polarization at 150 MHz, expressed as a percentage of the total intensity, amounts to ≈1.5%. There is no indication of diffuse emission in total intensity in the interferometric data, in line with results at higher frequencies. The wide frequency range, high angular resolution, and high sensitivity make LOFAR an exquisite instrument for studying Galactic polarized emission at a resolution of ~1-2 rad m-2 in Faraday depth. The different polarized patterns observed at 150 MHz and 350 MHz are consistent with different source distributions along the line of sight wring in a variety of Faraday thin regions of emission. The presence of polarized foregrounds is a serious complication for epoch of reionization experiments. To avoid the leakage of polarized emission into total intensity, which can depend on frequency, we need to calibrate the instrumental polarization across the field of view to a small fraction of 1%.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA

Profili:

Avatar Url Vibor Jelić (autor)

Poveznice na cjeloviti tekst rada:

doi arxiv.org www.aanda.org dx.doi.org

Citiraj ovu publikaciju:

Jelić, Vibor; de Bruyn, A. G.; Mevius, M.; Abdalla, F. B.; Asad, K. M. B.; Bernardi, G.; Brentjens, M. A.; Bus, S.; Chapman, E.; Ciardi, B. et al.
Initial LOFAR observations of epoch of reionization windows. II. Diffuse polarized emission in the ELAIS-N1 field // Astronomy and astrophysics, 568 (2014), A101-1 doi:10.1051/0004-6361/201423998 (međunarodna recenzija, članak, znanstveni)
Jelić, V., de Bruyn, A., Mevius, M., Abdalla, F., Asad, K., Bernardi, G., Brentjens, M., Bus, S., Chapman, E. & Ciardi, B. (2014) Initial LOFAR observations of epoch of reionization windows. II. Diffuse polarized emission in the ELAIS-N1 field. Astronomy and astrophysics, 568, A101-1 doi:10.1051/0004-6361/201423998.
@article{article, author = {Jeli\'{c}, Vibor and de Bruyn, A. G. and Mevius, M. and Abdalla, F. B. and Asad, K. M. B. and Bernardi, G. and Brentjens, M. A. and Bus, S. and Chapman, E. and Ciardi, B. and Daiboo, S. and Fernandez, E. R. and Ghosh, A. and Harker, G. and Jensen, H. and Kazemi, S. and Koopmans, L. V. E. and Labropoulos, P. and Martinez-Rubi, O. and Mellema, G. and Offringa, A. R. and Pandey, V. N. and Patil, A. H. and Thomas, R. M. and Vedantham, H. K. and Veligatla, V. and Yatawatta, S. and Zaroubi, S. and Alexov, A. and Anderson, J. and Avruch, I. M. and Beck, R. and Bell, M. E. and Bentum, M. J. and Best, P. and Bonafede, A. and Bregman, J. and Breitling, F. and Broderick, J. and Brouw, W. N. and Br\"{u}ggen, M. and Butcher, H. R. and Conway, J. E. and de Gasperin, F. and de Geus, E. and Deller, A. and Dettmar, R.-J. and Duscha, S. and Eisl\"{o}ffel, J. and Engels, D. and Falcke, H. and Fallows, R. A. and Fender, R. and Ferrari, C. and Frieswijk, W. and Garrett, M. A. and Grießmeier, J. and Gunst, A. W. and Hamaker, J. P. and Hassall, T. E. and Haverkorn, M. and Heald, G. and Hessels, J. W. T. and Hoeft, M. and H\"{o}randel, J. and Horneffer, A. and van der Horst, A. and Iacobelli, M. and Juette, E. and Karastergiou, A. and Kondratiev, V. I. and Kramer, M. and Kuniyoshi, M. and Kuper, G. and van Leeuwen, J. and Maat, P. and Mann, G. and McKay-Bukowski, D. and McKean, J. P. and Munk, H. and Nelles, A. and Norden, M. J. and Paas, H. and Pandey-Pommier, M. and Pietka, G. and Pizzo, R. and Polatidis, A. G. and Reich, W. and R\"{o}ttgering, H. and Rowlinson, A. and Scaife, A. M. M. and Schwarz, D. and Serylak, M. and Smirnov, O. and Steinmetz, M. and Stewart, A. and Tagger, M. and Tang, Y. and Tasse, C. and ter Veen, S. and Thoudam, S. and Toribio, C. and Vermeulen, R. and Vocks, C. and van Weeren, R. J. and Wijers, R. A. M. J. and Wijnholds, S. J. and Wucknitz, O. and Zarka, P.}, year = {2014}, pages = {A101-1-A101-12}, DOI = {10.1051/0004-6361/201423998}, keywords = {radio continuum: ISM, techniques: interferometric, techniques: polarimetric, cosmology: observations, diffuse radiation, dark ages, reionization, first stars}, journal = {Astronomy and astrophysics}, doi = {10.1051/0004-6361/201423998}, volume = {568}, issn = {0004-6361}, title = {Initial LOFAR observations of epoch of reionization windows. II. Diffuse polarized emission in the ELAIS-N1 field}, keyword = {radio continuum: ISM, techniques: interferometric, techniques: polarimetric, cosmology: observations, diffuse radiation, dark ages, reionization, first stars} }
@article{article, author = {Jeli\'{c}, Vibor and de Bruyn, A. G. and Mevius, M. and Abdalla, F. B. and Asad, K. M. B. and Bernardi, G. and Brentjens, M. A. and Bus, S. and Chapman, E. and Ciardi, B. and Daiboo, S. and Fernandez, E. R. and Ghosh, A. and Harker, G. and Jensen, H. and Kazemi, S. and Koopmans, L. V. E. and Labropoulos, P. and Martinez-Rubi, O. and Mellema, G. and Offringa, A. R. and Pandey, V. N. and Patil, A. H. and Thomas, R. M. and Vedantham, H. K. and Veligatla, V. and Yatawatta, S. and Zaroubi, S. and Alexov, A. and Anderson, J. and Avruch, I. M. and Beck, R. and Bell, M. E. and Bentum, M. J. and Best, P. and Bonafede, A. and Bregman, J. and Breitling, F. and Broderick, J. and Brouw, W. N. and Br\"{u}ggen, M. and Butcher, H. R. and Conway, J. E. and de Gasperin, F. and de Geus, E. and Deller, A. and Dettmar, R.-J. and Duscha, S. and Eisl\"{o}ffel, J. and Engels, D. and Falcke, H. and Fallows, R. A. and Fender, R. and Ferrari, C. and Frieswijk, W. and Garrett, M. A. and Grießmeier, J. and Gunst, A. W. and Hamaker, J. P. and Hassall, T. E. and Haverkorn, M. and Heald, G. and Hessels, J. W. T. and Hoeft, M. and H\"{o}randel, J. and Horneffer, A. and van der Horst, A. and Iacobelli, M. and Juette, E. and Karastergiou, A. and Kondratiev, V. I. and Kramer, M. and Kuniyoshi, M. and Kuper, G. and van Leeuwen, J. and Maat, P. and Mann, G. and McKay-Bukowski, D. and McKean, J. P. and Munk, H. and Nelles, A. and Norden, M. J. and Paas, H. and Pandey-Pommier, M. and Pietka, G. and Pizzo, R. and Polatidis, A. G. and Reich, W. and R\"{o}ttgering, H. and Rowlinson, A. and Scaife, A. M. M. and Schwarz, D. and Serylak, M. and Smirnov, O. and Steinmetz, M. and Stewart, A. and Tagger, M. and Tang, Y. and Tasse, C. and ter Veen, S. and Thoudam, S. and Toribio, C. and Vermeulen, R. and Vocks, C. and van Weeren, R. J. and Wijers, R. A. M. J. and Wijnholds, S. J. and Wucknitz, O. and Zarka, P.}, year = {2014}, pages = {A101-1-A101-12}, DOI = {10.1051/0004-6361/201423998}, keywords = {radio continuum: ISM, techniques: interferometric, techniques: polarimetric, cosmology: observations, diffuse radiation, dark ages, reionization, first stars}, journal = {Astronomy and astrophysics}, doi = {10.1051/0004-6361/201423998}, volume = {568}, issn = {0004-6361}, title = {Initial LOFAR observations of epoch of reionization windows. II. Diffuse polarized emission in the ELAIS-N1 field}, keyword = {radio continuum: ISM, techniques: interferometric, techniques: polarimetric, cosmology: observations, diffuse radiation, dark ages, reionization, first stars} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus

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