surveys of the Magellanic Clouds - and the Potential for the New H
Survey Miroslav D. Filipovi\'c , Paul A. Jones , Graeme L. White , Raymond F. Haynes, PASA, 15 (1), 128
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Discrete Sources towards the Magellanic Clouds
Radio Data
Catalogues of discrete radio sources towards the LMC at six radio frequencies are presented in Papers IV and IVa. The total number of catalogued radio sources is 483. The common area of the radio and H surveys (
100 square degrees) lies between RA(B1950)=04
23
to 0614 and Dec(B1950)=-64
to -74.
The new catalogues of radio sources in the SMC at five radio frequencies are given in Paper V. There are a total of 224 radio sources towards the SMC in a region of 42 square degrees between RA(B1950)=0012 to 0138 and Dec(B1950)=-6940' to -7620'.
As clear radio detections, we listed only radio sources that are stronger than 5
or seen in at least two frequencies.
H Data
The H investigation of the MCs started with the Henize (1956) catalogue of emission nebulae. These observations provided a remarkable data-base for investigating discrete sources, star formation regions and dust properties in the MCs. This is because the H emission from galaxies, such as MCs, is mostly due to thermal radiation, a process which is believed to be associated with HII regions.
Since Henize's pioneering work, a number of other H catalogues of sources in the MCs have been published. Some of them, such as the DEM catalogue (Davies et al. 1976), have a significant importance even today. For the comparison with radio data, we used the Kennicutt & Hodge (1986) catalogue of H objects in the field of the MCs. This catalogue consists of 235 objects in the field of the LMC and 99 in the SMC. Along with the positions and source extensions, they listed the H flux density for each catalogued source.
| Next Section: Radio to H Comparison Title/Abstract Page: A Comparison of Discrete Previous Section: Introduction | Contents Page: Volume 15, Number 1 |
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