An Extremely Hot Pulsating Pre-White Dwarf from OGLE
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909509384929280 |
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| author | Pietrukowicz, P. Werner, K. Mroz, M. J. Ratajczak, M. |
| author_facet | Pietrukowicz, P. Werner, K. Mroz, M. J. Ratajczak, M. |
| contents | We show that the blue 18.3-minute variable object discovered in the Galactic disk by the OGLE-III survey and named OGLE-GD-WD-0001 is a pulsating pre-white dwarf of PG 1159 spectral type. With an effective temperature of about 160,000 K it is among the hottest known pulsators being located close to the blue edge of the GW Virginis instability strip. The long-term OGLE observations indicate that the object has a positive period change rate of about $5 \times 10^{-10}$ $s~s^{-1}$ and thus already contracts. There are no traces of a planetary nebula around this star. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_17577 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An Extremely Hot Pulsating Pre-White Dwarf from OGLE Pietrukowicz, P. Werner, K. Mroz, M. J. Ratajczak, M. Solar and Stellar Astrophysics We show that the blue 18.3-minute variable object discovered in the Galactic disk by the OGLE-III survey and named OGLE-GD-WD-0001 is a pulsating pre-white dwarf of PG 1159 spectral type. With an effective temperature of about 160,000 K it is among the hottest known pulsators being located close to the blue edge of the GW Virginis instability strip. The long-term OGLE observations indicate that the object has a positive period change rate of about $5 \times 10^{-10}$ $s~s^{-1}$ and thus already contracts. There are no traces of a planetary nebula around this star. |
| title | An Extremely Hot Pulsating Pre-White Dwarf from OGLE |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2502.17577 |