On the evidence of a dark matter density spike around the primary black hole in OJ 287
Fuente:
arXiv
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866913783098638336 |
|---|---|
| author | Deb, Debabrata Gopakumar, Achamveedu Valtonen, Mauri J. |
| author_facet | Deb, Debabrata Gopakumar, Achamveedu Valtonen, Mauri J. |
| contents | The central engine of blazar OJ~287 is arguably the most notable supermassive black hole (SMBH) binary candidate that emits nano-Hertz (nHz) gravitational waves. This inference is mainly due to our ability to predict and successfully monitor certain quasi-periodic doubly peaked high brightness flares with a period of $\sim$12 years from this blazer. The use of post-Newtonian accurate SMBH binary orbital description that includes the effects of higher order GW emission turned out to be a crucial ingredient for accurately predicting the epochs of such Bremsstrahlung flares in our SMBH binary central engine description for OJ~287. It was very recently argued that one should include the effects of dynamical friction, induced by certain dark matter density spikes around the primary SMBH, to explain the {\it observed} decay of SMBH binary orbit in OJ~287. Invoking binary pulsar timing-based arguments, measurements, and OJ~287's orbital description, we show that observationally relevant SMBH binary orbital dynamics in OJ~287 are insensitive to dark matter-induced dynamical friction effects. This implies that we could only provide an upper bound on the spike index parameter rather than obtaining an observationally derived value, as argued by \cite{Chan2024}. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_05715 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the evidence of a dark matter density spike around the primary black hole in OJ 287 Deb, Debabrata Gopakumar, Achamveedu Valtonen, Mauri J. High Energy Astrophysical Phenomena Astrophysics of Galaxies General Relativity and Quantum Cosmology The central engine of blazar OJ~287 is arguably the most notable supermassive black hole (SMBH) binary candidate that emits nano-Hertz (nHz) gravitational waves. This inference is mainly due to our ability to predict and successfully monitor certain quasi-periodic doubly peaked high brightness flares with a period of $\sim$12 years from this blazer. The use of post-Newtonian accurate SMBH binary orbital description that includes the effects of higher order GW emission turned out to be a crucial ingredient for accurately predicting the epochs of such Bremsstrahlung flares in our SMBH binary central engine description for OJ~287. It was very recently argued that one should include the effects of dynamical friction, induced by certain dark matter density spikes around the primary SMBH, to explain the {\it observed} decay of SMBH binary orbit in OJ~287. Invoking binary pulsar timing-based arguments, measurements, and OJ~287's orbital description, we show that observationally relevant SMBH binary orbital dynamics in OJ~287 are insensitive to dark matter-induced dynamical friction effects. This implies that we could only provide an upper bound on the spike index parameter rather than obtaining an observationally derived value, as argued by \cite{Chan2024}. |
| title | On the evidence of a dark matter density spike around the primary black hole in OJ 287 |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2504.05715 |