A detached dust shell surrounding the J-type carbon star Y Canum Venaticorum.

Details A detached dust shell surrounding the J-type carbon star Y Canum Venaticorum. A detached dust shell surrounding the J-type carbon star Y Canum Venaticorum.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.221i&link_type=abstract

Astronomy and Astrophysics, v.315, p.L221-L224

Astronomy and Astrophysics

Astrophysics

58

Stars: Carbon, Stars: Evolution, Stars: Imaging, Stars: Individual: Y Cvn, Stars: Mass-Loss, Stars: Agb And Post-Agb, Dust

Scientific paper

This paper reports the first clear detection of a detached dust shell surrounding the prototypical J-type carbon star Y CVn in 90μm and 160μm maps taken with the ISO/ISOPHOT. The projected inner radius of the shell is 180"-190", corresponding to (6.4-7.1)x10^17^cm at a distance of 250pc. The shell thickness is obtained to be (2-5)x10^17^cm. The mass-loss rate at the formation of the shell is estimated to be in the range (7-20)x10^-6^Msun_/yr, about two orders of magnitude higher than the present-day mass-loss rate derived from CO gas observations. The obtained mass in the shell is (4-14)x10^-2^Msun_. It is concluded that the mass-loss rate decreased by two orders of magnitude on a short time scale 1.4x10^4^ years ago assuming an average shell expansion velocity of 15km/s, and that Y CVn has been staying at the low mass-loss state. The duration of the previous higher mass-loss phase would be at most 2x10^4^ years even if the asymmetry in the shell geometry is taken into account. The evolutionary status of Y CVn is also discussed.

Affiliated with

Also associated with

No associations

Rating

A detached dust shell surrounding the J-type carbon star Y Canum Venaticorum. 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 A detached dust shell surrounding the J-type carbon star Y Canum Venaticorum., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A detached dust shell surrounding the J-type carbon star Y Canum Venaticorum. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1144785