In Zickgraf et al. 1989 (A&A, 220, 206) there is a comment on the density of the disk around the supergiant LHA 115-S 18. In Table 1 they provide (following Waters 1986) the mean particle density at r=R* for a number of sources: 3.2 x 1012, 2.6 x 1012, 4.6 x 1012, 1.7 x 1012 cm-3 for sources S 18, S 12, S 134, and R 126, respectively. Having calculated a maximum disk radius of 300R*, they calculate a mean density of few 109 cm-3. These values are consistent with both estimates from IR emission and by McGregor et al. (1988), who independently found densities of about 109 cm-3 from the CO first overtone emission in S 12, S 134, and R 66.
Archive for September, 2018
Notes on the density of the disk/rings around B[e] supergiants
Posted September 20, 2018 By grigorisKick-off meeting at a new position!
Posted September 10, 2018 By grigorisToday it was my first day at the new job! It will be based at the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS) of the National Observatory of Athens (Greece).
I will be working with Alceste Bonanos, along with Ming Yang and Frank Tramper, in a project related to the “Episodic Mass Loss in Massive Stars: Key to Understanding the Explosive Early Universe” (ASSESS).
Although excited I am too tired to write something more now. But more will come in the future!
