SIMBAD references

1999A&A...351L...1L - Astronomy and Astrophysics, volume 351, L1-4 (1999/11-1)

The young detached CO shell around U Camelopardalis.

LINDQVIST M., OLOFSSON H., LUCAS R., SCHOEIER F.L., NERI R., BUJARRABAL V. and KAHANE C.

Abstract (from CDS):

We report IRAM Plateau de Bure interferometer observations of the carbon star U Cam in the CO(J=1-0) and CO(J=2-1) lines. The remarkable images show that U Cam is surrounded by a geometrically thin, ∼1016cm, shell of gas at a distance of ∼6x1016cm from the star, that expands with a velocity of ∼23km/s. The estimated mass of the shell is low, ∼10–3M. In addition, we detect emission that peaks at the stellar position. From this we estimate a present mass loss rate and gas expansion velocity of ∼2.5x10–7M/yr and 12km/s, respectively. One possible explanation to the structure of the circumstellar medium is that the shell was produced during a very short period, ∼150yr, of high mass loss rate, ∼10–5M/yr, about 800yr ago. U Cam may fit into the scenario where a helium-shell flash modulates the mass loss rate on short times scales.

Abstract Copyright:

Journal keyword(s): stars: carbon - stars: circumstellar matter - stars: individual: U Cam - stars: mass-loss

Simbad objects: 9

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:1999A&A...351L...1L and select 'bookmark this link' or equivalent in the popup menu


2019.10.17-21:25:19

© Université de Strasbourg/CNRS

    • Contact