Abstract
Eighteen days of MERLIN data and 42 hours of A-array VLA data at 1.4 GHz have been combined to image a 10-arcmin field centred on the Hubble Deep Field (HDF). This area also includes the Hubble Flanking Fields (HFF). A complete sample of 92 radio sources with S1.4GHz>40μJy was detected using the VLA data alone and then imaged with the MERLIN+VLA combination. The combined images offer: i) higher angular resolution (synthesised beams of diameter 0.2-0.5 arcsec) ii) improved astrometric accuracy and iii) improved sensitivity compared with VLA-only data. The images are amongst the most sensitive yet made at 1.4 GHz, with rms noise levels of 3.3μJy/beam in the 0.2-arcsec images. Virtually all the sources are resolved, with angular sizes in the range 0.2 to 3 arcsec. Radio sources associated with compact galaxies have been used to align the HDF, the HFF and a larger CFHT optical field, to the radio-based International Celestial Reference Frame. The HST optical fields have been registered to 70% of the sources are starburst-type systems associated with major disc galaxies in the redshift range 0.3 - 1.3.
Original language | English |
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Title of host publication | AIP Conference Proceedings |
Editors | Susanne Hüttmeister |
Pages | 408-414 |
Number of pages | 7 |
Volume | 783 |
DOIs | |
Publication status | Published - 4 Aug 2005 |
Event | THE EVOLUTION OF STARBURSTS: 331st Wilhelm and Else Heraeus Seminar - Bad Honnef Duration: 4 Aug 2005 → … |
Conference
Conference | THE EVOLUTION OF STARBURSTS: 331st Wilhelm and Else Heraeus Seminar |
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City | Bad Honnef |
Period | 4/08/05 → … |
Keywords
- galaxies
- red shift
- optical images
- astrometry
- radiosources (astronomical)