Oxygen-rich semiregular and irregular variables

Details Oxygen-rich semiregular and irregular variables Oxygen-rich semiregular and irregular variables

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...83..329j&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 83, no. 2, p. 329-349.

Astronomy and Astrophysics

Astrophysics

46

K Stars, M Stars, Oxygen, Semiregular Variable Stars, Stellar Spectra, Mira Variables, Red Giant Stars, Stellar Color

Scientific paper

All the known oxygen-rich semiregulars and irregulars of spectral classes K and M with the absolute value of B not greater than 30 deg, Delta(m) not less than 0.5 mag, and, for the semiregulars, periods in the range of 50 to 400 d are compiled. On the basis of their distributions on the sky and their brightnesses in the K band at 2.2 microns, it is argued that the semiregulars with a period of 300-400 d appear to belong to the same population as the 'thin disk' Miras in the same period range and have an exponential scale height from the Galactic plane of about 250 pc. The semiregulars with a period range of 200 to 300 d belong to the population of the 'thick disk' Miras with an exponential scale height from the Galactic plane of about 500 pc. On the basis of the similarities of their space distributions and the presence of Tc in their atmospheres, and using the pulsational mode calculations by Ostlie and Cox (1986), it is suggested that the semiregulars with a period range of 100-150 d are first and second overtone pulsations of the same population of AGB stars as the Miras in their fundamental pulsational mode with periods longer than 300 d.

Affiliated with

Also associated with

No associations

Rating

Oxygen-rich semiregular and irregular variables 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 Oxygen-rich semiregular and irregular variables, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen-rich semiregular and irregular variables will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1113616