IRAS sources and the nature of the Galactic Bulge

Details IRAS sources and the nature of the Galactic Bulge IRAS sources and the nature of the Galactic Bulge

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.248..276w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 248, Jan. 15, 1991, p. 276-312.

Astronomy and Astrophysics

Astronomy

154

Galactic Bulge, Infrared Sources (Astronomy), Milky Way Galaxy, Mira Variables, Astronomical Photometry, Infrared Astronomy Satellite, M Stars, Near Infrared Radiation, Stellar Evolution, T Tauri Stars

Scientific paper

This paper presents NIR JHKL photometry data (collected over 4-5 years) for a sample of 141 IRAS objects lying in two strips across the Galactic Bulge, with the absolute value of b between 7 and 8 deg and the value of l between 15 and 345 deg. It is shown that the sample is comprised of 113 Miras, 22 M giants, a probable M dwarf, a T Tau star, three highly reddened objects of uncertain nature, and one peculiar object. Periods and bolometric magnitudes were derived for 104 Miras. Of the periods determined, 71 percent of these Miras lie in the range 360-560 days, with the maximum and the minimum values of 722 and 170 d, respectively. The evolution of Miras and the origin of the Mira P-L relationship are discussed.

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