RE 0503−289
| Observation data Epoch Equinox | |
|---|---|
| Constellation | Caelum[1] |
| Right ascension | |
| Declination | |
| Characteristics | |
| Spectral type | DO |
| Astrometry | |
| Details | |
| Temperature | 60,000-80,000 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
RE 0503−289 is a hot helium rich (DO type) white dwarf. Optical and UV spectroscopy of this white dwarf gives a range of temperature between 60,000-80,000 Kelvin.[2] It lies in a region of space with a low interstellar hydrogen density and close to another hot DO type white dwarf named RE 0457-281.[2] A large variety of chemical elements have been found, many of which are heavier than the element iron.[3][4]
RE 0503-289 was the only known DO type white dwarf detected by the ROSAT sky survey.[2]
Composition
[edit]The search for the signatures of chemical elements above iron (trans-iron) in RE 0503-289 started with the discovery of gallium (Ga), germanium (Ge), arsenic (As), selenium (Se), krypton (Kr), molybdenum (Mo), tin (Sn), tellurium (Te), iodine (I), zinc (Zn) and xenon (Xe).[4] The white dwarf has carbon abundances of about 1%. strontium (Sr) has also been detected in RE 0503-289.[3]
Reference
[edit]- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c Barstow, M. A.; Holberg, J. B.; Werner, K.; Buckley, D. A. H.; Stobie, R. S. (1994-04-01). "The nature of the newly discovered DO white dwarf RE 0503 – 289". Monthly Notices of the Royal Astronomical Society. 267 (3): 653–659. doi:10.1093/mnras/267.3.653. ISSN 0035-8711.
- ^ a b Rauch, T.; Quinet, P.; Knörzer, M.; Hoyer, D.; Werner, K.; Kruk, J. W.; Demleitner, M. (2017-10-01). "Stellar laboratories - IX. New Se v, Sr iv–vii, Te vi, and I vi oscillator strengths and the Se, Sr, Te, and I abundances in the hot white dwarfs G191−B2B and RE 0503−289". Astronomy & Astrophysics. 606: A105. arXiv:1706.09215. Bibcode:2017A&A...606A.105R. doi:10.1051/0004-6361/201730383. ISSN 0004-6361.
- ^ a b Sahal-Bréchot, S.; Elabidi, H. (2021-08-01). "Stark broadening for Br VI and Kr V-VII lines in hot star atmospheres". Astronomy & Astrophysics. 652: A47. Bibcode:2021A&A...652A..47S. doi:10.1051/0004-6361/202140729. ISSN 0004-6361.
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