UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Infrared photometry of southern planetary nebulae and emission-line objects

Cohen, M; Barlow, MJ; (1980) Infrared photometry of southern planetary nebulae and emission-line objects. The Astrophysical Journal , 238 (2) pp. 585-595. 10.1086/158015. Green open access

[img]
Preview
Text
Cohen_Barlow1980_ApJ238_585.pdf - Published version

Download (951kB) | Preview

Abstract

Ten-micron photometry is presented of 23 planetary nebulae, seven very low excitation (VLE) nebulae, and 11 emission-line objects, of which more than half were also detected at 20 microns. The 10-micron behaviors of the various classes of objects are compared, and it is shown that planetary nebulae can easily be distinguished from VLE nebulae by virtue of the silicate emission displayed by the latter. A uniform sample of planetary nebulae for statistical analysis is created by combining the present sample with an earlier northern hemisphere survey. It is shown that L alpha photons are the dominant grain heating mechanism for nebular electron densities less than approximately 15,000/cu cm, whereas above this density direct dust absorption of stellar continuum photons dominates.

Type: Article
Title: Infrared photometry of southern planetary nebulae and emission-line objects
Open access status: An open access version is available from UCL Discovery
DOI: 10.1086/158015
Publisher version: https://doi.org/10.1086/158015
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Infrared Astronomy; Infrared Photometry; Planetary Nebulae; Stellar Radiation; Stellar Spectrophotometry; Emission Spectra; Infrared Radiation; Infrared Spectra; Line Spectra; Lyman Alpha Radiation; Radiant Flux Density; Radiation Distribution; Radio Astronomy; Southern Hemisphere; Statistical Analysis; Astrophysics
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10095249
Downloads since deposit
12Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item