Infrared spectroscopy of radio-luminous OH/IR stars

Details Infrared spectroscopy of radio-luminous OH/IR stars Infrared spectroscopy of radio-luminous OH/IR stars

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..158j&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, Jan. 1988, p. 158-171. Research supported by the Australian National University.

Astronomy and Astrophysics

Astronomy

20

Hydroxyl Radicals, Infrared Spectroscopy, Infrared Stars, Radio Stars, Carbon Monoxide, Mira Variables, Supergiant Stars, Water Vapor

Scientific paper

Low-resolution 1.5-2.5 μm spectra for 21 radio-luminous OH/IR stars are presented. These spectra divide into two broad classes. Those with very strong water-vapor absorption closely resemble the spectra of classified Mira variables and are classified Type VM. Those with weaker water-vapor absorption, but still showing strong CO absorption, resemble the spectra of true core-burning supergiants and are classified Type SG. Comparison of the classification of 30 radio-luminous OH/IR stars with their ΔV's and luminosities suggests this classification is a good indicator of the intrinsic nature of the underlying star. There is some evidence, however, that some true supergiants (massive main-sequence progenitors) develop the pulsation properties and photospheric characteristics of the Mira-like OH/IR stars when they become optically obscured OH/IR stars.

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