Asymptotic Giant Branch and Supergiant Stellar Diameters in the Mid-Infrared

Details Asymptotic Giant Branch and Supergiant Stellar Diameters in the Mid-Infrared Asymptotic Giant Branch and Supergiant Stellar Diameters in the Mid-Infrared

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...589..976w&link_type=abstract

The Astrophysical Journal, Volume 589, Issue 2, pp. 976-982.

Astronomy and Astrophysics

Astronomy

32

Infrared: Stars, Stars: Agb And Post-Agb, Stars: Individual (Χ Cygni, Α Herculis), Stars: Individual: Constellation Name: R Leonis, Stars: Individual: Constellation Name: Α Orionis, Techniques: Interferometric

Scientific paper

The size of the continuum photospheres of α Ori, α Her, R Leo, and χ Cyg have been measured at 11 μm using heterodyne interferometry to accuracies as high as 1%. An assortment of narrow wavelength bands near 11 μm (each having a width ~0.17 cm-1) were used to avoid spectral lines. The resulting apparent diameters for α Ori and α Her are ~30% larger than measured near-infrared sizes, whereas the Mira variables, R Leo and χ Cyg, have 11 μm apparent diameters roughly twice their reported near-infrared sizes. The complexities of interpretation are discussed.

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