Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988rmxaa..16...99l&link_type=abstract
Revista Mexicana de Astronomia y Astrofisica, Vol. 16, No. 2, p. 99 - 103
Astronomy and Astrophysics
Astronomy
6
Cometary Nebulae:Energy Distribution, Cometary Nebulae:H Ii Regions, Cometary Nebulae:Infrared Maps, Cometary Nebulae:Star Formation, Cometary Nebulae:Vla Maps, H Ii Regions:Cometary Nebulae, Infrared Maps:Cometary Nebulae, Star Formation:Cometary Nebulae, Vla Maps:Cometary Nebulae
Scientific paper
Multifrequency observations have been obtained for the cometary nebula P18 (NGC 2316). The set of data consists of CCD frames in the I and R bands; J,H,K and Larcmin near-infrared photometry and maps in the H and K bands, and radio continuum observations at λ 6-cm. These have been combined with previously published photometry at 10 and 22 μm, IRAS and Kuiper data. The results indicate that P18 is a compact H II region located at a distance of ≡1 kpc and is being excited by an embedded single early B-type star. Two condensations located near the apex of the nebula, apparent in the optical-red and near-infrared maps and previously misidentified as "stars", are related to light from the H II region shining through the disrupted circumstellar dust shell.
Friedman Scott David
Lopez Jose Alberto
Rodriguez Luis F.
Roth Marcel
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