Physics
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eimw.confe..40m&link_type=abstract
"The Evolving ISM in the Milky Way and Nearby Galaxies, The Fourth Spitzer Science Center Conference, Proceedings of the confere
Physics
Stars: Symbiotic, Stars: Individual: Bi Crucis, Infrared: Ism, Ism: Dust, Ism: Structure
Scientific paper
Spitzer, IRAC and MIPS images reveal a large dust emission feature ˜6 arcmin in diameter which appears to be a shell in close proximity to, and perhaps physically related to, the D-type Mira symbiotic BI Cru. Smaller optical lobes are already known to be emanating from some symbiotics including BI Cru. However, this is the first extended structure found in the IR which is associated with a symbiotic Mira system. The IR shell of BI Cru is more than five times larger in arc size than the star's optical lobe. Published distance estimates imply that the IR shell is ˜4 to ˜8 pc in diameter, which is larger than the largest optical lobe known to be associated with any Mira symbiotic system. The large disparity between its IR and optical shell sizes, along with what appear to be multiple intersecting arcs, suggest that BI Cru has undergone multiple mass-loss episodes. A trend of rapidly increasing brightness toward longer wavelengths, along with a much more diffuse structure at 70μm than at shorter wavelengths, and suggests a greater abundance of relatively colder and older dust which may be the remnant of earlier mass outflows.
Bruhweiler Fred C.
Eriksson Martin
McCollum Bruce
Verner E. M.
Wahlgren Glenn Michael
No associations
LandOfFree
A Large Infrared Shell Structure Associated with the Symbiotic Star BI Crucis 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 Large Infrared Shell Structure Associated with the Symbiotic Star BI Crucis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Large Infrared Shell Structure Associated with the Symbiotic Star BI Crucis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1562792