Far-infrared observations of NGC 7027

Abstract

view Abstract Citations (58) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Far-infrared observations of NGC 7027. Telesco, C. M. ; Harper, D. A. Abstract Far-infrared observations of the planetary nebula NGC 7027 show that its total infrared flux is 2.4 by 10 to the -10th power W/sq m, approximately one-third of which is emitted in each of the intervals from 1 to 17, 17 to 30, and 30 to 300 microns. Sufficient energy to account for the corresponding infrared luminosity of 23,000 times the solar value at 1.77 kpc is available as diffuse nebular radiation or from moderate competition between dust and gas for Lyman continuum photons. Most of the infrared flux arises from a source comparable in size to the H II region. The flux at wavelengths greater than 17 microns can be attributed to grains with temperatures not exceeding 120 K and total mass such that the gas-to-dust ratio is close to the lower limit allowed by cosmic abundances. Publication: The Astrophysical Journal Pub Date: January 1977 DOI: 10.1086/154954 Bibcode: 1977ApJ...211..475T Keywords: Far Infrared Radiation; Infrared Astronomy; Luminous Intensity; Planetary Nebulae; Abundance; Diffuse Radiation; H Ii Regions; Near Infrared Radiation; Thermal Emission; Astrophysics full text sources ADS | data products SIMBAD (1)