A spectroscopic atlas of the A7 Ib supergiant ι Carinae in the near-IR
Abstract
High-quality spectral atlases provide the basis for the exploration of the line features in stellar spectra and provide benchmarks for the comparison of models with observations. Currently, we face a dearth of high-resolution spectral atlases of the near-IR wavelength range, with only two such atlases available, for the Sun and for Arcturus. The CRIRES-POP project aims at making available high-quality atlases covering the 1-5μm range for strategic targets throughout the Hertzsprung-Russell diagram. Here, we discuss the preparation of a high-resolution (R ≈ 100 000), high-signal-to-noise ratio (SNR > 200) near-IR spectral atlas of the A7 Ib supergiant ι Car. Using BRITE-Constellation data we find that the star is not variable, facilitating a meaningful spectral atlas to be constructed from nearly 200 spectral exposures collected throughout a year of service observations with CRIRES on the ESO VLT. Emphasis is given on the different reduction steps in the atlas preparation, and on problems encountered in the process.
- Publication:
-
Second BRITE-Constellation Science Conference: Small Satellites - Big Science
- Pub Date:
- September 2017
- Bibcode:
- 2017sbcs.conf..240K