تقرير
An Eclipsing 47 minute Double White Dwarf Binary at 400 pc
| العنوان: | An Eclipsing 47 minute Double White Dwarf Binary at 400 pc |
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| المؤلفون: | Munday, James, Tremblay, P. -E., Hermes, J. J., Barlow, Brad, Pelisoli, Ingrid, Marsh, T. R., Parsons, Steven G., Jones, David, Kepler, S. O., Brown, Alex, Littlefair, S. P., Hegedus, R., Baran, Andrzej, Breedt, Elmé, Dhillon, V. S., Dyer, Martin J., Green, Matthew J., Kennedy, Mark R., Kerry, Paul, Lopez, Isaac D., Romero, Alejandra D., Sahman, Dave, Worters, Hannah L. |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | We present the discovery of the eclipsing double white dwarf (WD) binary WDJ 022558.21-692025.38 that has an orbital period of 47.19 min. Following identification with the Transiting Exoplanet Survey Satellite, we obtained time-series ground based spectroscopy and high-speed multi-band ULTRACAM photometry which indicate a primary DA WD of mass 0.40 +- 0.04 Msol and a 0.28 +- 0.02 Msol mass secondary WD, which is likely of type DA as well. The system becomes the third-closest eclipsing double WD binary discovered with a distance of approximately 400 pc and will be a detectable source for upcoming gravitational wave detectors in the mHz frequency range. Its orbital decay will be measurable photometrically within 10 yrs to a precision of better than 1%. The fate of the binary is to merge in approximately 41 Myr, likely forming a single, more massive WD. Comment: Accepted for publication in MNRAS, 8 pages + 2 appendix pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stad2347 |
| URL الوصول: | http://arxiv.org/abs/2308.00036 |
| رقم الأكسشن: | edsarx.2308.00036 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stad2347 |
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