Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.4420h&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #44.20; Bulletin of the American Astronomical Society, Vol. 32, p.1475
Astronomy and Astrophysics
Astronomy
Scientific paper
We report on high spectral resolution 2.3 and 5 μ m observations of HD 44179, the central star of the red rectangle. The red rectangle is an exotic bipolar object with a disk surrounding a post-AGB, spectroscopic binary. The F I star HD 44179 is the observed member of the binary. The 2.3 μ m first overtone CO lines are in absorption with two excitation temperatures, ~100 K for the low J lines and ~800 K for the high J lines. The heliocentric radial velocity of all the 2.3 μ m 12CO lines is +19 km s-1, the radial velocity previously reported for the circumstellar nebula. 13CO lines are detected. The 4.6 μ m CO lines are in emission, confirming lower resolution ISO observations of the 4.6 μ m CO in emission in HD 44179. NOAO is operated by the Association of Universities for Research in Astronomy, Inc. under cooperative agreement with the National Science Foundation.
Bernath Peter
Hedden Abigail
Hinkle Kenneth H.
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