RE 0503−289
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Caelum[1] |
| Right ascension | 05h 03m 55.5149s[2] |
| Declination | −28° 54′ 34.631″[2] |
| Apparent magnitude (V) | 13.58[3] |
| Characteristics | |
| Spectral type | DOZ[3] |
| Astrometry | |
| Proper motion (μ) | RA: +76.715 mas/yr[2] Dec.: +72.251 mas/yr[2] |
| Parallax (π) | 7.2332±0.0325 mas[2] |
| Distance | 451 ± 2 ly (138.3 ± 0.6 pc) |
| Details | |
| Temperature | 60,000-80,000[4] K |
| Other designations | |
| WD 0501-289, 2MASS J05035551-2854345, RE J0503-289, MCT 0501-2858[3] | |
| 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.[4] 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.[4] A large variety of chemical elements have been found, many of which are heavier than the element iron.[5][6]
RE 0503-289 was the only known DO type white dwarf detected by the ROSAT sky survey.[4]
Composition
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).[6] The white dwarf has carbon abundances of about 1%. strontium (Sr) has also been detected in RE 0503-289.[5]
References
- ^ 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 d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c "MCT 0501-2858". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ a b c d 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.