Studying the Radiation of a White Dwarf Star Falling onto a Black Hole
We investigate electromagnetic and gravitational radiation generated during the process of the tidal stripping of a white dwarf star circulating a black hole. We go beyond Chandrasekhar’s ideas and not only consider the white dwarf itself as a quantum object, but also describe the dynamics of the pr...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adae8c |
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| author | Marek Nikołajuk Tomasz Karpiuk Lorenzo Ducci Mirosław Brewczyk |
| author_facet | Marek Nikołajuk Tomasz Karpiuk Lorenzo Ducci Mirosław Brewczyk |
| author_sort | Marek Nikołajuk |
| collection | DOAJ |
| description | We investigate electromagnetic and gravitational radiation generated during the process of the tidal stripping of a white dwarf star circulating a black hole. We go beyond Chandrasekhar’s ideas and not only consider the white dwarf itself as a quantum object, but also describe the dynamics of the produced accretion disk in a quantum way. We model the white dwarf star as a Bose–Fermi droplet and use the quantum hydrodynamic equations to simulate the evolution of the black hole–white dwarf binary system. While going through periastron, the white dwarf loses a small fraction of its mass. The mass falling onto a black hole is a source of powerful electromagnetic and gravitational radiation. Bursts of ultraluminous radiation are flared at each periastron passage. This resembles the recurrent flaring of X-ray sources discovered recently by Irwin et al. Gravitational energy bursts occur mainly through emission at very low frequencies. The accretion disk, formed due to stripping of the white dwarf, starts at some point to contribute continuously to radiation of both electromagnetic and gravitational types. |
| format | Article |
| id | doaj-art-c39b4df237f34e4aa4390e8e0e9c1c6c |
| institution | DOAJ |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-c39b4df237f34e4aa4390e8e0e9c1c6c2025-08-20T02:56:02ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980225610.3847/1538-4357/adae8cStudying the Radiation of a White Dwarf Star Falling onto a Black HoleMarek Nikołajuk0https://orcid.org/0000-0003-4075-6745Tomasz Karpiuk1https://orcid.org/0000-0001-7194-324XLorenzo Ducci2https://orcid.org/0000-0002-9989-538XMirosław Brewczyk3https://orcid.org/0000-0002-5273-0641Faculty of Physics, University of Białystok , ul. K. Ciołkowskiego 1L, 15-245 Białystok, Poland ; m.nikolajuk@uwb.edu.pl, t.karpiuk@uwb.edu.plFaculty of Physics, University of Białystok , ul. K. Ciołkowskiego 1L, 15-245 Białystok, Poland ; m.nikolajuk@uwb.edu.pl, t.karpiuk@uwb.edu.plInstitut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Eberhard Karls Universität , Sand 1, 72076 Tübingen, Germany; Department of Astronomy, University of Geneva , Chemin d’Ecogia 16, CH-1290 Versoix, SwitzerlandFaculty of Physics, University of Białystok , ul. K. Ciołkowskiego 1L, 15-245 Białystok, Poland ; m.nikolajuk@uwb.edu.pl, t.karpiuk@uwb.edu.plWe investigate electromagnetic and gravitational radiation generated during the process of the tidal stripping of a white dwarf star circulating a black hole. We go beyond Chandrasekhar’s ideas and not only consider the white dwarf itself as a quantum object, but also describe the dynamics of the produced accretion disk in a quantum way. We model the white dwarf star as a Bose–Fermi droplet and use the quantum hydrodynamic equations to simulate the evolution of the black hole–white dwarf binary system. While going through periastron, the white dwarf loses a small fraction of its mass. The mass falling onto a black hole is a source of powerful electromagnetic and gravitational radiation. Bursts of ultraluminous radiation are flared at each periastron passage. This resembles the recurrent flaring of X-ray sources discovered recently by Irwin et al. Gravitational energy bursts occur mainly through emission at very low frequencies. The accretion disk, formed due to stripping of the white dwarf, starts at some point to contribute continuously to radiation of both electromagnetic and gravitational types.https://doi.org/10.3847/1538-4357/adae8cWhite dwarf starsHydrodynamical simulationsStellar accretion disksSchwarzschild black holes |
| spellingShingle | Marek Nikołajuk Tomasz Karpiuk Lorenzo Ducci Mirosław Brewczyk Studying the Radiation of a White Dwarf Star Falling onto a Black Hole The Astrophysical Journal White dwarf stars Hydrodynamical simulations Stellar accretion disks Schwarzschild black holes |
| title | Studying the Radiation of a White Dwarf Star Falling onto a Black Hole |
| title_full | Studying the Radiation of a White Dwarf Star Falling onto a Black Hole |
| title_fullStr | Studying the Radiation of a White Dwarf Star Falling onto a Black Hole |
| title_full_unstemmed | Studying the Radiation of a White Dwarf Star Falling onto a Black Hole |
| title_short | Studying the Radiation of a White Dwarf Star Falling onto a Black Hole |
| title_sort | studying the radiation of a white dwarf star falling onto a black hole |
| topic | White dwarf stars Hydrodynamical simulations Stellar accretion disks Schwarzschild black holes |
| url | https://doi.org/10.3847/1538-4357/adae8c |
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