Search for radio recombination lines at 408 MHz with the northern cross

Details Search for radio recombination lines at 408 MHz with the northern cross Search for radio recombination lines at 408 MHz with the northern cross

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26at...20..203s&link_type=abstract

Astronomical and Astrophysical Transactions, vol. 20, Issue 2, pp.203-206

Astronomy and Astrophysics

Astronomy

1

Ism, Radio Lines, Hii Regions, Cassiopeia A

Scientific paper

Spectral line search was carried out for the first time with the Northern Cross radiotelescope at Medicina (Italy). The total bandpass of the antenna was sampled and processed in real time with the high resolution digital FFT spectrometer. The radio recombination line of carbon C252 was reliably detected toward Cassiopeia A. The observed line profile is composed of 3 emission components at positions -47 km s-1, -38 km s-1 and 0 km s-1 and relative intensities as 3:2:1. The detection of the component at zero velocity is of special importance since there has been only one measurement of such an emission made at 325 MHz.

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