| Author | dc.contributor.author | Bergeron, P. | |
| Author | dc.contributor.author | Ruiz González, María Teresa | es_CL |
| Author | dc.contributor.author | Hamuy Wackenhut, Mario | es_CL |
| Author | dc.contributor.author | Leggett, K. | es_CL |
| Author | dc.contributor.author | Currie, M. J. | es_CL |
| Author | dc.contributor.author | Lajoie, C.-P. | es_CL |
| Author | dc.contributor.author | Dufour, P. | |
| Admission date | dc.date.accessioned | 2013-04-12T13:33:15Z | |
| Available date | dc.date.available | 2013-04-12T13:33:15Z | |
| Publication date | dc.date.issued | 2005-06-01 | |
| Cita de ítem | dc.identifier.citation | The Astrophysical Journal, 625:838–848, 2005 June 1 | en_US |
| Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/125782 | |
| General note | dc.description | Artículo de publicación ISI | en_US |
| Abstract | dc.description.abstract | A detailed analysis of 32 of the 38 halo white dwarf candidates identified by Oppenheimer et al. is presented, based
on model atmosphere fits to observed energy distributions built from optical BVRI and infrared JHK CCD photometry.
Effective temperatures and atmospheric compositions are determined for all objects, as well as masses and
cooling ages when trigonometric parallax measurements are available. This sample is combined with that of other
halo white dwarf candidates and disk white dwarfs to study the nature of these objects in terms of reduced proper
motion diagrams, tangential velocities, and stellar ages.We reaffirm the conclusions of an earlier analysis based on
photographic magnitudes of the same sample that total stellar ages must be derived in order to associate a white
dwarf with the old halo population, and that this can only be accomplished through precise mass and distance
determinations. | en_US |
| Patrocinador | dc.description.sponsorship | This work was supported in part by
the NSERC Canada and by the Fund FQRNT (Que´bec). M. T. R.
received partial support from Fondecyt (1010404) and FONDAP
(15010003). Support for this work was also provided to M. H. by
NASA through Hubble Fellowship grant HST-HF-01139.01A,
awarded by the Space Telescope Science Institute, which is operated
by the Association of Universities for Research in Astronomy,
Inc., for NASA, under contract NAS 5-26555. | en_US |
| Lenguage | dc.language.iso | en | en_US |
| Keywords | dc.subject | Galaxy: halo | en_US |
| Título | dc.title | On the interpretation of high-velocity white dwarfs as members of the galactic halo | en_US |
| Document type | dc.type | Artículo de revista | |
