Halo Stars Near the Hydrogen-Burning Limit: The M/L Subdwarf Transition
| dc.creator | Gizis, J. E. | |
| dc.creator | Harvin, J. | |
| dc.date | 2006-08-26 | |
| dc.date.accessioned | 2026-07-07T11:25:57Z | |
| dc.date.available | 2026-07-07T11:25:57Z | |
| dc.description | We present the first far-red spectra of the L subdwarf 2MASS J16262034+3925190 and the late M/early L subdwarf 2MASS J16403197+1231068. We confirm the ultracool subdwarf nature of these objects. 2M1626+3925 shows strong K I absorption, like an L4 dwarf, and is very similar to, but hotter than, the late L subdwarf 2MASS J05325346+8246465. It is unambiguously an L subdwarf. 2M1640+1231 is very similar to SSSPM J1444-2019, which has been classified as sdM9 or early sdL. In contrast to the hotter M subdwarfs, L subdwarfs are characterized by not only enhanced hydrides but also strong TiO. Progress in a classification system requires identification of more subdwarfs to map out their variations. | |
| dc.description | accepted to Astronomical Journal | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0608573 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0608573 | |
| dc.identifier | Astron.J.132:2372-2375,2006 | |
| dc.identifier | doi:10.1086/508514 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195671 | |
| dc.subject | Astrophysics | |
| dc.title | Halo Stars Near the Hydrogen-Burning Limit: The M/L Subdwarf Transition | |
| dc.type | text |