Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.198..199g&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 198, Jan. 1982, p. 199-214.
Astronomy and Astrophysics
Astronomy
64
Galactic Structure, Infrared Photometry, Milky Way Galaxy, Mira Variables, Stellar Spectrophotometry, Variable Stars, Astronomical Catalogs, Colorimetry, Galactic Nuclei, Infrared Astronomy, Interstellar Extinction, Oort Cloud
Scientific paper
The 70 Mira variables in the galactic center windows Sgr I and NGC 6522 are subjected to JHKL infrared observations, with distances being derived by means of the Glass and Lloyd Evans (1981) period-luminosity relation for LMC Miras. It is found that the galactic center Miras fit a period-luminosity relation with a scatter of only about 0.2 mag. An analysis of the Mira data alone yields A(v) of 2.0 mag and a distance to the galactic center of 8.8 kpc, but upon combination with the Oort and Plaut (1975) analysis of RR Lyrae variables, A(v) and galactic center distance values of 1.5 mag and 9.2 + or - 0.6 kpc, respectively, are presented as the best estimate. With the exception of five red variables whose nature has not been determined, the Galactic Center Miras populate the same color-color plots as the solar neighborhood Miras.
Feast Michael W.
Glass S000. I.
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