The circumstellar molecular envelope of HD 101584

Details The circumstellar molecular envelope of HD 101584 The circumstellar molecular envelope of HD 101584

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...347..194o&link_type=abstract

Astronomy and Astrophysics, v.347, p.194-202 (1999)

Astronomy and Astrophysics

Astrophysics

18

Stars: Circumstellar Matter, Stars: Individual: Hd 101584, Stars: Mass-Loss, Stars: Agb And Post-Agb, Radio Lines: Stars

Scientific paper

CO radio line observations reveal a molecular gas envelope around the peculiar star HD101584 with characteristics very similar to those of wellknown young post-AGB objects. We estimate that there is at least 0.1 M_sun of molecular gas, very likely remnant gas from a former AGB-envelope. This gas has been efficiently accelerated to very high velocities (>50 {km s(-1) , and a significant fraction to >100 {km s(-1) ). There is evidence for an expanding disk-like structure seen close to edge-on, and a high-velocity bipolar outflow. In the latter the expansion velocity increases linearly with distance from the star, suggesting either a brief period of ejection or a fast wind interacting with a slower wind. A significant fraction of the high-velocity gas has reached a welldefined terminal velocity. Momentum well above the available radiation momentum has been transferred to the gas. There are also indications of high-density, low-velocity molecular gas, possibly in a disk close to the star. The (12) CO/(13) CO-ratio in the envelope is uncertain, but probably quite low ( ~ 10). The systemic heliocentric velocity is 50+/-2 {km s(-1) .

Affiliated with

Also associated with

No associations

Rating

The circumstellar molecular envelope of HD 101584 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The circumstellar molecular envelope of HD 101584, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The circumstellar molecular envelope of HD 101584 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1617142