Near-IR spectra of IPHAS extremely red Galactic AGB stars - Astrophysics > Solar and Stellar AstrophysicsReport as inadecuate




Near-IR spectra of IPHAS extremely red Galactic AGB stars - Astrophysics > Solar and Stellar Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present a library of 139 near-IR spectra of cool asymptotic giant branchstars that will be useful for comparison with theoretical model atmospherecalculations and for modeling the integrated emission from intermediate-agestellar populations. The source list was selected from the `extremely red-region of the INT Photometric H Alpha Survey IPHAS colour-colour plane thatis overwhelmingly dominated by very late-type stars. The spectral library alsoincludes a large fraction of S-type and carbon stars. We present a number ofspectral classification sequences highlighting the various molecular featuresidentified and discuss a number of rare features with uncertain identificationsin the literature. With its focus on particularly cool photospheres thiscatalogue serves as a companion to recent spectroscopic atlases of MK standardsin the near-IR. Finally the relationship between IPHAS r-i- and r-H Alphacolours and spectroscopically determined properties is discussed and a strongcorrelation between r-H Alpha colour and the C-O abundance index for S-typeand carbon stars is noted. This relation has the potential to separate O-rich,S-type and carbon stars in the Galaxy based on their photometry alone.



Author: N.J. Wright CfA, M.J. Barlow UCL, R. Greimel Graz, J.E. Drew Hertfordshire, M. Matsuura UCL, Y.C. Unruh Imperial, A.A. Zijlstra M

Source: https://arxiv.org/







Related documents