Probing the AGB Tip - Luminous Carbon Stars in the Galactic Plane

Details Probing the AGB Tip - Luminous Carbon Stars in the Galactic Plane Probing the AGB Tip - Luminous Carbon Stars in the Galactic Plane

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...275..163k&link_type=abstract

Astronomy and Astrophysics, Vol.275, NO. 1/AUG(I), P. 163, 1993

Astronomy and Astrophysics

Astrophysics

41

Surveys, Stars: Carbon, Stars: Agb, Stars: Evolution, Circumstellar Matter, Radio Lines: Stars

Scientific paper

To address the question of the progenitor mass range of carbon stars, we searched for CO emission from a sample of distant (d ˜ 2-10 kpc), heavily obscured asymptotic giant branch (AGB) stars that are confined to the galactic plane. We detected 47 stars for the first time, and have determined luminosities for ˜40 of these via a kinematic technique. Based on IRAS low resolution spectra, detections of circumstellar molecules other than CO, IR colors, and/or CO line strength relative to IRAS flux, we have classified the bulk of the circumstellar envelopes as carbon- or oxygen-rich. We deduce similar average luminosities for carbon stars and oxygen-rich stars from 1.3 104 to 2 1O4 Lsun, depending on the method used to compute bolometric fluxes. These averages are larger than typically assumed or derived for carbon stars in the solar neighborhood, and are similar to the average luminosity of "cold" OH/IR stars. The results suggest that luminous carbon and oxygen-rich AGB stars near the galactic plane are descended from stellar populations of similar mean mass. This mean mass (>2Msun) is probably larger than the mean progenitor mass of AGB stars in general.

Affiliated with

Also associated with

No associations

Rating

Probing the AGB Tip - Luminous Carbon Stars in the Galactic Plane 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 Probing the AGB Tip - Luminous Carbon Stars in the Galactic Plane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probing the AGB Tip - Luminous Carbon Stars in the Galactic Plane will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1489947