2005/02/24 by Adam J. Burgasser, Burgasser, Adam J.
Earth and Planetary Sciences · Economics, Econometrics and Finance · Physics and Astronomy · #Arctic and Antarctic ice dynamics #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Geophysics and Gravity Measurements #Regional Economic and Spatial Analysis #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0502527
4 pages, 4 figures, contribution to "The Spitzer Space Telescope: New Views of the Cosmos" meeting held 9-12 November 2004; v2 fixes some botched references (thanks to R. Scholz for pointing them out)
openalex publication_date 2005/02/24 · arxiv created 2005/03/01 · arxiv updated 2009/12/01 · openalex created_date 2020/06/25 · openalex updated_date 2026/07/28
Recent discoveries from red optical proper motion and wide-field\nnear-infrared surveys have uncovered a new population of ultracool subdwarfs,\nmetal-poor stars and brown dwarfs extending into the late-type M, L and\npossibly T spectral classes. These objects are among the first low-mass stars\nand brown dwarfs formed in the Galaxy, and are valuable tracers of metallicity\neffects in low-temperature atmospheres. Like solar metallicity late-type\ndwarfs, ultracool subdwarfs emit the majority of their emergent flux at\ninfrared wavelengths. Here I discuss how Spitzer observations will contribute\nto the study of these objects, enabling measurement of the temperature scale,\ntests for dust formation and the identification of surface gravity and\nmetallicity diagnostics in the coldest brown dwarfs.\n