Evidence for Polarized Solar Flare Emission From Simultaneous Radio Observations in Australia and Vietnam

Nguyen Thi Thao, Nguyen Thi Phuong, Pierre Darriulat, Pham Ngoc Diep, Do Thi Hoai, Pham Tuyet Nhung, Pham Tuan Anh
Author affiliations

Authors

  • Nguyen Thi Thao Vietnam National satellite center
  • Nguyen Thi Phuong VATLY, VNSC, VAST, 18 Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
  • Pierre Darriulat VATLY, VNSC, VAST, 18 Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
  • Pham Ngoc Diep VATLY, VNSC, VAST, 18 Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
  • Do Thi Hoai VATLY, VNSC, VAST, 18 Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
  • Pham Tuyet Nhung VATLY, VNSC, VAST, 18 Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam
  • Pham Tuan Anh VATLY, VNSC, VAST, 18 Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam

DOI:

https://doi.org/10.15625/0868-3166/25/1/5829

Keywords:

radio astronomy, radio emission of the Sun, solar flares, polarization.

Abstract

A sample of 34 solar flares recorded in Ha Noi using the VATLY radio telescope between April 2012 and January 2014 at frequencies of 1415 and 1417.6 MHz is compared with the corresponding observations made at 1415 MHz by the solar observatory of Learmonth (Australia). While good overall agreement is obtained, a few differences are noted and studied in some detail. In particular, the use of different feeds in Ha Noi and Learmonth reveals a case of very large polarization of the flare emission.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

N.V. Hiep et al., Radio Observation of Solar-Activity-Related mHz Oscillations, Sol. Phys. 289, 3 (2014), 939-950. DOI: https://doi.org/10.1007/s11207-013-0356-y

N.T. Phuong (on behalf of VATLY) presented at 2nd South East Asia Young Astronomer Collaboration, November 19-22, Bandung, Indonesia, 2013.

P.T. Nhung (on behalf of VATLY) presented at the Conference “Windows on the Universe”, August 11-17, Quy Nhon, Vietnam, 2013.

P.N. Diep et al., Correlated Oscillations Due to Similar Multipath Effects Seen in Two Widely Separated Radio Telescopes, Publications of the Astronomical Society of Australia, 31, e029 doi:10.1017/pasa.2014.24. DOI: https://doi.org/10.1017/pasa.2014.24

N.T. Phuong (on behalf of VATLY), presented at Workshop on Astronomy and Astrophysics in Vietnam, April 7-11, Institute for Nuclear Science and Technology, Ha Noi, Viet Nam.

P.N. Diep (on behalf of VATLY), presented at 12th Asia-Pacific Region IAU Meeting, Daejeon, Korea, 2014.

N.T Phuong, Solar and other observations using the VATLY radio telescope, Master thesis, in preparation.

N.V. Hiep et al., The VATLY radio telescope, Comm. Phys. Vietnam 22/4 (2012) 365; DOI: https://doi.org/10.15625/0868-3166/22/4/435

N.V. Hiep (on behalf of VATLY), Presented at the Second Academic Conference on Natural Science for Master and PhD students from Cambodia, Laos, Malaysia and Vietnam, 11-15 October 2011, Vinh, Vietnam.

P.T.Anh (on behalf of VATLY) presented at the 7th Annual Conference of the Thai Physics Society, May 9-12, 2012, Phranakhon Si, Ayutthaya, Thailand.

N.V.Hiep (on behalf of VATLY) presented at the 1st Southeast Asian Young Astronomers Collaboration (SEAYAC) Meeting, November 5-9, 2012, Puerto Princesa City, Palawan, Philippines.

N.T. Phuong et al., The VATLY radio telescope: performance study, accepted for publication in Comm. Phys. Vietnam.

B.V. Tuan, A study of the six major solar flares recently detected from Ha Noi and Learmonth at 1415 MHz compared with other frequencies, internship report presented at University of Science and Technology of Hanoi, Master Space and Applications, September, 2014.

N.H. Phuong Thanh, A study of 34 solar flares detected by Hanoi and Learmonth telescope at 1415 MHz between 2012 and 2014, internship report presented at University of Science and Technology of Hanoi, Master Space and Applications, September, 2014.

Australian Government, Bureau of Meteorology, Radio and Space Weather Services, http://www.ips.gov.au/World_Data_Centre/1/10. http://www.ips.gov.au/World_Data_Centre/1/10.">

http://solar.nro.nao.ac.jp/norh/html/event/ http://solar.nro.nao.ac.jp/norh/html/event/">

See for example M. Karlicky and M. Barta, Nonlinear Processes in Geophysics (2004) 11: 471 and references therein. DOI: https://doi.org/10.5194/npg-11-471-2004

J.D. Kraus, A Helical-Beam Antenna Without a Ground Plane, IEEE Antennas and Propagation Magazine,, April 1995, p. 45. DOI: https://doi.org/10.1109/74.382338

J.D. Kraus, Antennas, McGraw-Hill, 1950.

J.D. Kraus and R.J. Marhefka, Antennas: for All Applications, third edition, McGraw-Hill, 2002.

See also http://www.w1ghz.org/antbook/conf/Helical_feed_antennas.pdf and references therein for an excellent summary. http://www.w1ghz.org/antbook/conf/Helical_feed_antennas.pdf and references therein for an excellent summary.">

http://www.nasa.gov/content/goddard/sun-emits-2nd-solar-flare-in-2-days/ http://www.nasa.gov/content/goddard/sun-emits-2nd-solar-flare-in-2-days/">

TESIS, http://www.tesis.lebedev.ru/en/about_tesis.html; http://www.tesis.lebedev.ru/en/about_tesis.html;">

NOAA, http://www.swpc.noaa.gov/ftpmenu/warehouse/2013.html; http://www.swpc.noaa.gov/ftpmenu/warehouse/2013.html;">

http://solar.physics.montana.edu/max_millennium/data_archives.shtml. http://solar.physics.montana.edu/max_millennium/data_archives.shtml.">

http://www.ngdc.noaa.gov/stp/space-weather/solar-data/solar-features/solar-radio/rstn http://www.ngdc.noaa.gov/stp/space-weather/solar-data/solar-features/solar-radio/rstn">

-1-second/san-vito/2013/

R. Hanbury Brown and R. Q. Twiss, Nature 178/4541 (1956) 1046. DOI: https://doi.org/10.1038/1781046a0

Space Weather Highlights, SWPC PRF 1991, 28 October 2013, http://www.swpc. http://www.swpc.">

noaa.gov/weekly/2013_WeeklyPDF/prf1991.pdf.

IPS: 2012, Australian Government, Bureau of Meteorology, Radio and Space Weather Services, http://www.ips.gov.au/Satellite/6/3. http://www.ips.gov.au/Satellite/6/3.">

E.W. Cliver, S.M. White and K.S. Balasubramaniam, The Astrophysics Journal, 743 (2011) 145 and references therein. DOI: https://doi.org/10.1088/0004-637X/743/2/145

Downloads

Published

21-04-2015

How to Cite

[1]
N. T. Thao, N. T. Phuong, P. Darriulat, P. N. Diep, D. T. Hoai, P. T. Nhung and P. T. Anh, Evidence for Polarized Solar Flare Emission From Simultaneous Radio Observations in Australia and Vietnam, Comm. Phys. 25 (2015) 75. DOI: https://doi.org/10.15625/0868-3166/25/1/5829.

Issue

Vol. 25 No. 1 (2015)

Section

Papers

License

Authors who publish with CIP agree with the following terms:
  1. The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
  2. The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).
Crossref
Scopus
Google Scholar
Europe PMC
Received 14-01-2015
Published 21-04-2015

Most read articles by the same author(s)

1 2 > >>