Other
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998an....319..375s&link_type=abstract
Astronomische Nachrichten, Vol. 319, No. 6, p. 375 - 386
Other
8
M Stars: Luminosities, Magellanic Clouds: Distances
Scientific paper
On the bases of the new classification system introduced by Malyuto et al. (1997) a new technique to determine luminosities for M type stars has been established. Due to the lack of accurate distances and their inhomogeneity especially for supergiants the intrinsic scatter is rather high with 0.4 to 0.5 mag. The uncertainty of the zeropoint is 0.07 to 0.08 mag. Applying the new method to M supergiant members of the LMC a distance modulus of 18.34±0.09 mag is derived which agrees well with recent work. The luminosities of the stars range from those of Galactic Iab to those of Ia-Ia-0 supergiants, i.e. the upper luminosity limit does not exceed that of their Galactic counterparts. Like the Ca II H and K emission technique of Wilson and Bappu (1957), for which a revised calibration is given, the new method spans an extremely wide range of luminosities. It is less universal, as it can be applied to M stars only, but not to K stars. On the other hand the Wilson-Bappu-method requires high resolution spectroscopy so that it is restricted to bright stars in our Galaxy. The authors' new technique may be applied to faint stars in nearby galaxies since it requires low resolution spectroscopy only.
Oestreicher M. O.
Schmidt-Kaler Theodor
No associations
LandOfFree
The luminosity index for M stars and the distance to the LMC. 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 The luminosity index for M stars and the distance to the LMC., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The luminosity index for M stars and the distance to the LMC. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1719802