Published April 1983
| Version v1
Journal article
The infrared spectrum and variability of Eta Carinae
- 1. Council for Scientific and Industrial Research, Cape Town (South Africa). South African Astronomical Observatory
Description
JHKL photometry shows a slow brightening of eta Car between 1972 and 1980 with a more rapid increase in 1980/81. The total range is about 0.4 mag at K. The visual brightness also increased in 1972-82. Unless variable neutral extinction is involved the brightness variations imply simultaneous changes in the dust emission and at least one other component in the system. This is consistent with these components being powered by a single (variable) central source. Variable He I lines are noted in the infrared and optical regions. The He I line intensity ratios show that the nebula is optically thick in the He I resonance line at 584 A. (author)
Additional details
Publishing Information
- Journal Title
- Mon. Not. R. Astron. Soc.
- Journal Volume
- 203
- Journal Issue
- 1
- Series
- Mon. Not. R. Astron. Soc.
- Journal Page Range
- 385-392
- ISSN
- 0035-8711
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 14804175
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- BRIGHTNESS; COSMIC DUST; EMISSION SPECTRA; INFRARED SPECTRA; NEBULAE; OPACITY; PHOTOMETRY; VARIABLE STARS; VARIATIONS; VISIBLE RADIATION
- Descriptors DEC
- DUSTS; ELECTROMAGNETIC RADIATION; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; SPECTRA; STARS