Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008seraj.177...53p&link_type=abstract
Serbian Astronomical Journal, vol. 177, pp. 53-59
Astronomy and Astrophysics
Astronomy
4
Planetary Nebulae: Individual: Smp L8, Smp L25, Smp L33, Smp L39, Smp L47, Smp L62, Smp L74, Smp L75, Smp L83, Smp L84, Smp L89
Scientific paper
We present 11 spectra from 12 candidate radio sources co-identified with known planetary nebulae (PNe) in the Large Magellanic Cloud (LMC). Originally found in Australia Telescope Compact Array (ATCA) LMC surveys at 1.4, 4.8 and 8.64~GHz and confirmed by new high resolution ATCA images at 6 and 3~cm (4 arcsec/2 arcsec), these complement data recently presented for candidate radio PNe in the Small Magellanic Cloud (SMC). Their spectra were obtained using the Radcliffe 1.9-meter telescope in Sutherland (South Africa). All of the optical PNe and radio candidates are within 2 arcsec and may represent a population of selected radio bright sample only. Nebular ionized masses of these objects are estimated to be as high as 1.8~M_&sun;, supporting the idea that massive PNe progenitor central stars lose much of their mass in the asymptotic giant branch (AGB) phase or prior. We also identify a sub-population (33%) of radio PNe candidates with prominent ionized iron emission lines.
Crawford Evan J.
de Horta Ain Yaci
Filipović Miroslav D.
Millar William C.
Payne Jeff L.
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