Spitzer Sage/lmc Observations Of Extreme Carbon Stars As A Probe Of Carbon-rich Stardust Properties

Details Spitzer Sage/lmc Observations Of Extreme Carbon Stars As A Probe Of Carbon-rich Stardust Properties Spitzer Sage/lmc Observations Of Extreme Carbon Stars As A Probe Of Carbon-rich Stardust Properties

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934302p&link_type=abstract

American Astronomical Society, AAS Meeting #219, #343.02

Astronomy and Astrophysics

Astronomy

Scientific paper

Intermediate mass stars eventually evolve into asymptotic giant branch (AGB) stars and are major contributors of new mateiral to the interstellar medium (ISM) and the next generation of stars. The Spitzer legacy program Surveying the Agents of Galaxy Evolution (SAGE) performed an infrared survey of the Large and Small Magellanic Clouds(LMC and SMC, respectively). SAGE's goal is to follow the life cycle of matter that drives galactic evolution. SAGE-Spec is the spectroscopic follow up project in which we study the dust production in more detail. Here we present a study of extreme carbon stars in the LMC. These stars have intermediate mass and are losing copious amounts of material to the ISM. These carbon stars have such high mass-loss rates that the dust shells they form completely obscure their starlight. The SAGE program has discovered that these extreme carbon stars are more common than expected compared to the number found in our own galaxy and for the sub-solar metallicity of the LMC. This dataset allows us to investigate the variations in properties of the dust around are fairly homogeneous sample of stars. We show that the emissivity of the dust around extreme carbon stars varies markedly and is rarely consistent with the commonly-assumed emissivity power-law value of 1.2.

Affiliated with

Also associated with

No associations

Rating

Spitzer Sage/lmc Observations Of Extreme Carbon Stars As A Probe Of Carbon-rich Stardust Properties 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 Spitzer Sage/lmc Observations Of Extreme Carbon Stars As A Probe Of Carbon-rich Stardust Properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer Sage/lmc Observations Of Extreme Carbon Stars As A Probe Of Carbon-rich Stardust Properties will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1581441