Near-IR spectra of IPHAS extremely red Galactic AGB stars

Wright, J. N., Barlow, M. J., Greimel, R., Drew, J. E., Matsuura, M. ORCID: https://orcid.org/0000-0002-5529-5593, Unruh, Y. C. and Zijlstra, A. A. 2009. Near-IR spectra of IPHAS extremely red Galactic AGB stars. Monthly Notices of the Royal Astronomical Society 400 (3) , 1413–1426. 10.1111/j.1365-2966.2009.15536.x

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Abstract

We present a library of 139 near-IR spectra of cool asymptotic giant branch stars that will be useful for comparison with theoretical model atmosphere calculations and for modelling the integrated emission from intermediate-age stellar populations. The source list was selected from the `extremely red' region of the Isaac Newton Telescope (INT) Photometric Hα Survey (IPHAS) colour-colour plane that is overwhelmingly dominated by very late-type stars. The spectral library also includes a large fraction of S-type and carbon stars. We present a number of spectral classification sequences highlighting the various molecular features identified and discuss a number of rare features with uncertain identifications in the literature. With its focus on particularly cool photospheres, this catalogue serves as a companion to recent spectroscopic atlases of MK standards in the near-IR. Finally, the relationship between IPHAS (r' - i') and (r' - Hα) colours and spectroscopically determined properties is discussed and a strong correlation between the (r' - Hα) colour and the C/O abundance index for S-type and 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....

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Oxford University Press
ISSN:	0035-8711
Date of Acceptance:	11 August 2009
Last Modified:	10 May 2024 14:15
URI:	https://orca.cardiff.ac.uk/id/eprint/168076

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