Abstract
We have developed an affordable horn antenna at St. Stephen’s College, which has been used to perform various research-based activities in the college astronomy lab. In this article, we present three of our experiments performed in our undergraduate lab with respect to radio frequency interference in the campus and provide the relevant data. We also present and analyse our results for the 21-cm Hydrogen line emission data collected using our affordable horn antenna. In the third experiment, we study the radiation pattern of our horn antenna. The aim of the article is to present experiments to explore radio astronomy in the lab that can be done by undergraduate students with minimum cost.
Similar content being viewed by others
Suggested Reading
Ronald L Snell, Jonathan M Marr and Stanley E Kurtz, Fundamentals of Radio Astronomy Observational Methods, CRC Press, Boca Raton, FL 33487, United States, 2015.
Paul W Hodge, Milky way galaxy, Encyclopedia Britannica, Chicago, IL 60654-2682, 2019.
Bikram Phookun and Biman Nath, Dark matter: Part 2 – Dark matter in the universe, Resonance, Vol.4, No.10, pp.40–46, 1999.
Ashish A Mhaske, Joydeep Bagchi, Bhal Chandra Joshi, Joe Jacob and K T Paul, A Bose Horn Antenna Radio Telescope (BHARAT) design for 21 cm hydrogen line experiments for radio astronomy teaching, Am. J. Phys., Vol.90, No.12, pp.948–960, 12 2022.
M Valdés, A Ferrara, M Mapelli and E Ripamonti, Constraining dark matter through 21-cm observations, Mon. Notices Royal Astron. Soc., Vol.377, No.1, pp.245–252, 2007.
Victor Boesen, H-line software, https://github.com/byggemandboesen/H-line-software
Altair, Feko, https://altair.com/feko
R D Ekers and J F Bell, Radio frequency interference, In: The Universe at Low Radio Frequencies, A Pramesh Rao, G Swarup and Gopal-Krishna (eds), Vol.199, p.498, 2002.
National frequency allocation plan, Government of India, Department of Telecommunications, Ministry of Communications, 2022.
Rajaram Nityananda, Discovering the rotation of our own galaxy, Resonance, Vol.20, No.10, pp.869–879, 2015.
Leo W H Fung, Albert Wai Kit Lau, Ka Hung Chan and Ming Tony Shing, WTH! wok the hydrogen: Measurement of galactic neutral hydrogen in noisy urban environment using kitchenware, 2023.
Bertil Lindblad, Theories of Spiral Structure in Galaxies, In: Problems of Extra-galactic Research, George Cunliffe McVittie (ed.), Proceedings from International Astronomical Union Symposium No. 15, Macmillan Publishers, New York, p.146, 1962.
B Arul Pandian, Ganesh Lakshamanan, Stephen Inbanathan, K B Raghavendra, Ramaiah Somashekar and T Prabu, Galaxy rotation curve measurements with low cost 21 cm radio telescope, Sadhana: Acad. Proc. Eng. Sci., Vol.47, 2022, Article ID 0068.
J H Oort, Observational evidence confirming Lindblad’s hypothesis of a rotation of the galactic system, Bull. Astronomical Inst. Netherlands, Vol.3, p.275, 1927.
Stacy McGaugh, A precise milky way rotation curve model for an accurate galactocentric distance, Research Notes of the AAS, Vol.2, No.3, p.156, 2018.
Acknowledgements
The authors are grateful to Prof. Avinash Deshpande and Pavan Uttarkar for their constant support and the Raman Research Institute, Bengaluru, for providing us with the initial instrumentation to set up the horn antenna. The authors are also grateful to the Principal, St. Stephen’s College, for his encouragement and support by providing the facility and funds to conduct experiments. The authors are also grateful to the reviewer for very insightful comments.
Author information
Authors and Affiliations
Corresponding authors
Additional information
Nadia Makhijani is a third-year student at St. Stephen’s College, Delhi, pursuing a degree in Physics and plans to continue in the field of Astronomy.
Udish Sharma is a final year student of BSc Physics Hons at St. Stephen’s College, Delhi.
Geetanjali Sethi is an Associate Professor at the Department of Physics in St. Stephen’s College, Delhi, and works primarily in Cosmology and Astrophysics.
Rights and permissions
About this article
Cite this article
Makhijani, N., Sharma, U. & Sethi, G. Affordable Astronomy using Horn Antenna. Reson 29, 935–951 (2024). https://doi.org/10.1007/s12045-024-0935-2
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12045-024-0935-2