Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasj...51..197y&link_type=abstract
Publications of the Astronomical Society of Japan, v.51, p.197-209.
Astronomy and Astrophysics
Astronomy
11
Data Analysis, Principal-Component Analysis, Stars: Late-Type, Stars: Mass Loss, Stars: Supergiants, Stellar Distances
Scientific paper
Based on the Principal Component Analysis on IRAS colors and the radio data, the distances to 183 mass-losing red giant stars were determined using the radial velocity and Oort's galactic rotation model for a zero-point calibration in the distance modulus. Also, based on the requirement of higher accuracy of the distance determination, the mass-losing red giant stars were divided into two groups by means of the first-principal component representing an intrinsic photometric property of the expanding shell; then, the distances were estimated to be log {d(kpc)}=0.458 p_2+0.09+/-0.13 for group 1 and log {d(kpc)}=0.325 p_2+0.45+/-0.15 for group 2, where p_2 is the principal component corresponding to the distance, as obtained from the IRAS flux, which was assumed to be inversely proportional to the square of the distance. Thus,these two groups differ from each other not only by their photometric properties, but also by their average distances, by a factor of about 2. Systematic differences exist between the two groups in their population characteristics and in their evolutionary stages.
Magono Shigeko
Unno Wasaburo
Yuasa Manabu
No associations
LandOfFree
Distance Determination of Mass-Losing Stars 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 Distance Determination of Mass-Losing Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distance Determination of Mass-Losing Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-893756