Limits on planetary-mass primordial black holes from the OGLE high-cadence survey of the Magellanic Clouds
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866929598082580480 |
|---|---|
| author | Mróz, Przemek Udalski, Andrzej Szymański, Michał K. Soszyński, Igor Pietrukowicz, Paweł Kozłowski, Szymon Poleski, Radosław Skowron, Jan Ulaczyk, Krzysztof Gromadzki, Mariusz Rybicki, Krzysztof Iwanek, Patryk Wrona, Marcin Mróz, Mateusz J. |
| author_facet | Mróz, Przemek Udalski, Andrzej Szymański, Michał K. Soszyński, Igor Pietrukowicz, Paweł Kozłowski, Szymon Poleski, Radosław Skowron, Jan Ulaczyk, Krzysztof Gromadzki, Mariusz Rybicki, Krzysztof Iwanek, Patryk Wrona, Marcin Mróz, Mateusz J. |
| contents | Observations of the Galactic bulge revealed an excess of short-timescale gravitational microlensing events that are generally attributed to a large population of free-floating or wide-orbit exoplanets. However, in recent years, some authors suggested that planetary-mass primordial black holes (PBHs) comprising a substantial fraction (1%-10%) of the dark matter in the Milky Way may be responsible for these events. If that was the case, a large number of short-timescale microlensing events should also be seen toward the Magellanic Clouds. Here, we report the results of a high-cadence survey of the Magellanic Clouds carried out from 2022 October through 2024 May as part of the Optical Gravitational Lensing Experiment. We observed almost 35 million source stars located in the central regions of the Large and Small Magellanic Clouds and found only one long-timescale microlensing event candidate. No short-timescale events were detected despite high sensitivity to such events. That allows us to infer the strongest available limits on the frequency of planetary-mass PBHs in dark matter. We find that PBHs and other compact objects with masses from $1.4 \times 10^{-8}\,M_{\odot}$ (half of the Moon mass) to $0.013\,M_{\odot}$ (planet/brown dwarf boundary) may comprise at most 1% of dark matter. That rules out the PBH origin hypothesis for the short-timescale events detected toward the Galactic bulge and indicates they are caused by the population of free-floating or wide-orbit planets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_06251 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Limits on planetary-mass primordial black holes from the OGLE high-cadence survey of the Magellanic Clouds Mróz, Przemek Udalski, Andrzej Szymański, Michał K. Soszyński, Igor Pietrukowicz, Paweł Kozłowski, Szymon Poleski, Radosław Skowron, Jan Ulaczyk, Krzysztof Gromadzki, Mariusz Rybicki, Krzysztof Iwanek, Patryk Wrona, Marcin Mróz, Mateusz J. Cosmology and Nongalactic Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Experiment High Energy Physics - Phenomenology Observations of the Galactic bulge revealed an excess of short-timescale gravitational microlensing events that are generally attributed to a large population of free-floating or wide-orbit exoplanets. However, in recent years, some authors suggested that planetary-mass primordial black holes (PBHs) comprising a substantial fraction (1%-10%) of the dark matter in the Milky Way may be responsible for these events. If that was the case, a large number of short-timescale microlensing events should also be seen toward the Magellanic Clouds. Here, we report the results of a high-cadence survey of the Magellanic Clouds carried out from 2022 October through 2024 May as part of the Optical Gravitational Lensing Experiment. We observed almost 35 million source stars located in the central regions of the Large and Small Magellanic Clouds and found only one long-timescale microlensing event candidate. No short-timescale events were detected despite high sensitivity to such events. That allows us to infer the strongest available limits on the frequency of planetary-mass PBHs in dark matter. We find that PBHs and other compact objects with masses from $1.4 \times 10^{-8}\,M_{\odot}$ (half of the Moon mass) to $0.013\,M_{\odot}$ (planet/brown dwarf boundary) may comprise at most 1% of dark matter. That rules out the PBH origin hypothesis for the short-timescale events detected toward the Galactic bulge and indicates they are caused by the population of free-floating or wide-orbit planets. |
| title | Limits on planetary-mass primordial black holes from the OGLE high-cadence survey of the Magellanic Clouds |
| topic | Cosmology and Nongalactic Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.06251 |