Ultracool Subdwarfs: Subsolar Metallicity Objects Down to Substellar Masses
| dc.creator | Burgasser, Adam J. | |
| dc.date | 2007-01-29 | |
| dc.date.accessioned | 2026-07-07T07:43:24Z | |
| dc.date.available | 2026-07-07T07:43:24Z | |
| dc.description | In the past few years, astronomers have uncovered several very low-temperature, metal-poor stars with halo or thick disk kinematics and peculiar spectral and photometric properties, so-called ultracool subdwarfs. These include the first examples of L subdwarfs - metal-poor analogs of the L dwarf spectral class - and slightly metal-deficient T dwarfs. Ultracool subdwarfs provide useful empirical tests of low temperature atmosphere and evolutionary models, and are probes of the halo mass function down to and below the (metal-dependent) hydrogen burning limit. Here I summarize the optical and near-infrared spectroscopic properties of these objects, review recent research results, and point out scientific issues of interest in this developing subject. | |
| dc.description | 5 pages, 4 figures, contribution to proceedings for the 14th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, 6-10 November 2006 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0701793 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0701793 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/122812 | |
| dc.subject | Astrophysics | |
| dc.title | Ultracool Subdwarfs: Subsolar Metallicity Objects Down to Substellar Masses | |
| dc.type | text |