White Dwarfs in the HET Dark Energy Experiment
| Autor: | B. G. Castanheira, D. E. Winget, K. Williams, M. H. Montgomery, R. E. Falcon, J. J. Hermes, Klaus Werner, T. Rauch |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
media_common.quotation_subject Dark matter Astrophysics::Instrumentation and Methods for Astrophysics Astronomy White dwarf Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Universe Galaxy Stars Observatory Dark energy Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Massive compact halo object Astrophysics::Galaxy Astrophysics media_common |
| Zdroj: | AIP Conference Proceedings. |
| ISSN: | 0094-243X |
| DOI: | 10.1063/1.3527795 |
| Popis: | In the past decades, large scale surveys have discovered a large number of white dwarfs. For example, the Sloan Digital Sky Survey (SDSS) Data Release 7 [5] lists about 20 000 spectroscopically confirmed new white dwarfs. More than just a number, the new discoveries revealed different flavors of white dwarfs, including a new class of pulsators [7] and a larger percentage of stars with a magnetic field [4]. The HET Dark Energy Experiment (HETDEX) will use the 9.2 m Hobby‐Eberly Telescope at McDonald Observatory and a set of 150 spectrographs to map the three‐dimensional positions of one million galaxies. The main goal of the survey is to probe dark energy by observing the recent universe (2⩽z⩽4). However, this unique, magnitude‐limited survey (V⩽22) will also provide a variety of by‐products. We expect to obtain spectra for about 10 000 white dwarfs in the next 3 to 4 years. |
| Databáze: | OpenAIRE |
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