Spectra of Cool Stars in the J Band (1.0-1.3 μm) at Medium Resolution
Abstract
A spectroscopic survey of 103 cool S-, C-, and M-type stars was undertaken with the Kitt Peak cryogenic spectrograph on the 1.3 m telescope to make a detailed search for new molecular bands in the 1.0-1.3 μm J-band region. While the spectra have high signal-to-noise ratios and good repeatability, no strong new features were found. Higher resolution spectra of a small sample of representative stars observed with the 4 m Fourier transform spectrometer were invoked in order to identify the features in these spectra. With few exceptions, the details of these spectra are well understood. Laboratory spectra were obtained to aid in the identification of some weak features. Spectral features from dominant lines of Ti, Fe, Al, Si, Mn, Na, and K, and molecular bands due to TiO, TiS, ZrO, ZrS, VO, H_2O, and CN, have been identified in the spectra. Several weak unidentified bands are found.
- Publication:
-
The Astronomical Journal
- Pub Date:
- November 1998
- DOI:
- 10.1086/300594
- Bibcode:
- 1998AJ....116.2520J
- Keywords:
-
- INFRARED RADIATION;
- STARS: AGB AND POST-AGB;
- STARS: VARIABLES: GENERAL