A. R. Taylor papers related to 21cm line

A. Russell Taylor
Director, University of Calgary Centre for Radio Astronomy
Professor, Department of Physics and Astronomy

The Outer Disk of the Milky Way Seen in 21-cm Absorption
(download pdf)

Authors: John M. Dickey, Simon Strasser, B.M. Gaensler, Marijke Haverkorn, Dain Kavars, N. M. McClure-Griffiths, Jeroen Stil, A. R. Taylor

(Submitted on 8 Jan 2009) on arXiv

Abstract: Three recent surveys of 21-cm line emission in the Galactic plane, combining single dish and interferometer observations to achieve resolution of 1 arcmin to 2 arcmin, 1 km/s, and good brightness sensitivity, have provided some 650 absorption spectra with corresponding emission spectra for study of the distribution of warm and cool phase H I in the interstellar medium. These emission-absorption spectrum pairs are used to study the temperature of the interstellar neutral hydrogen in the outer disk of the Milky Way, outside the solar circle, to a radius of 25 kpc.

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BSc. (EEE) Thesis project – Reionization

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C-band radio telescope with cassegrian antenna

Cassegrain antenna on the rooftop of IUT (Bangladesh) academic building. It was brought for communicating with the satellites of SingTel. In fact it was used as a VSat. IUT has taken BTTB internet connection. So VSat is of no use now. We have taken this chance and implementing this dish antenna to build our Radio Telescope.

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Radio telescope operating at Ku-band

There are two kinds of radio astronomy projects: Low-cost projects for high schools and semi-professional projects for universities. We have decided to perform something in between these two projects. So, we have planned of a radio telescope that will operate at Ku-band, have sufficient sensitivity and resolution to make observations of the moon and it’s cost will be within the reach of our University.

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Yagi-Uda antenna

A Yagi-Uda Antenna, commonly known simply as a Yagi antenna or Yagi, is a directional antenna system consisting of an array of a dipole and additional closely coupled parasitic elements (usually a reflector and one or more directors). The dipole in the array is driven, and another element, 5% longer, operates as a reflector. Other shorter parasitic elements are typically added in front of the dipole as directors. This arrangement gives the antenna directionality that a single dipole lacks. Yagis are directional along the axis perpendicular to the dipole in the plane of the elements, from the reflector through the driven element and out via the director(s). If one holds out one’s arms to form a dipole and has the reflector behind oneself, one would receive signals with maximum gain from in front of oneself.

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Project ‘Radio Telescope’

Islamic University of Techonology (IUT), Organization of the Islamic Conference (OIC)

4th Year Project, BSc. Engg. (EEE)
Academic year – 2008-2009

Project group members:

– Raihan Abir (052470)

– Khan Muhammad Bin Asad (052413)

– Md. Emon Hossain Khan (052401)

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